New AMD user here. Upgraded from a 9900k to a 7800x3D. I have experience overclocking the Intel platforms from various generations. Very new to AMD stuff.
Heard PBO Curve editor could potentially squeeze out some extra performance by undervolting... but will I really notice a real world difference if I don't have problems with temps?
Don't really want to have a run in with messing with system stability for a 1-2% gain in overall performance/fps in games.
I use a Noctua NH-D15 and on Cinebench stress tests I hit max 70C on all cores at stock. No PBO set. Only thing set is EXPO for RAM
Videos
Wondering if anyone has experience with using PBO and curve optimizer with the 7800x3d. I’ve went-30 nothing happens. Boost clock offset nothing happens. Manual Thermal limit nothing happens.
I spent hours messing with these settings and always get 18500-18600 in cinebench. 18605 was my highest. Pulls around 87w. 4.919mhz max boost.
I’ve seen some say this is normal but watching online people are making huge drops in watts.
If I’m stupid just tell me. Coming from 8700k. That’s the last year I built a pc. Never had amd. Thanks.
My goal is to keep my system completely stock, no overclocking and within AMD spec. Like my RAM speed for example I want to keep it at 5200mt/s as that is what AMD officially supports as the max for this chip.
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But what I'm confused about is what exactly is considered "not an overclock" by AMD with the 7800x3D. Do I just keep the standard "Core Performance Boost" enabled and let the single core clock boost to 5Ghz as that is what is in the specs for the chip, or should I still look at enabling PBO? It's not clear to me if enabling PBO is actually considered an "overclock" and I've tried Googling this (and searching here) without a clear answer. Using Curve Optimizer does seem to be out of the question as I'm looking for a completely stable system and I don't like the idea of possible instabilities with undervolting (which is overclocking or maybe it isn't with this chip?).
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Just looking for clarity on this. My understanding, which could be wrong, is that PBO is lifting some limits to increase the voltage to get a higher clock speed as long as the power and thermal overhead are available to it. On paper it does read like an "overclock", but considering the CPU at stock dynamically changes frequency under load I am not sure either. So if this isn't considered an "overclock" then I would enable it if there's room for performance gain but otherwise all I really care about is stability and not overclocking.
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GPU: Asus RTX4090
CPU: 7800x3D
Motherboard: Asrock B650M-HDV/M.2
BIOS Version: 3.01
RAM: Crucial 32GB Kit (16GBx2) DDR5-5200 UDIMM - JEDEC timings
PSU: Corsair AX1600i
Case: Fractal Torrent
Operating System & Version: Windows 11 23H2
GPU Drivers: GEFORCE GAME READY DRIVER - WHQL Driver Version: 560.70
Chipset Drivers:AMD REV 6.07.22.037
Background Applications: N/A
Description of Original Problem: Trying to figure out if PBO is considered an overclock by AMD.
Troubleshooting: I've done googling on this but haven't reached a clear answer that I'm sure about.
So, I noticed people saying that it was safe to enable PBO on a 7800x3d so I did so with a -30 (seemed like a common number people were using). My system seems to be boosting up to 5050 now where before I think 4750mhz was the top end.
My temps however went from maxing out around 65 to going up as high as 83 but settling around 70.
I have the galahad LCD sl inf 360 AIO which is more than enough to keep this thing cool from the wattage estimations. I know thermal throttle isn't until around 100c on this thing but I'd like to keep it as cool as possible for longevity reasons.
Is PBO really helping me much (7900xtx GPU, 32gb ddr5-6000) or should I just put it back the way it was? I feel like 250-300mhz probaably isn't worth the added thermal stress on the CPU.
Or should I play with lower offsets... or am I overthinking the whole thing?
I had an I9-9900k with a 240mm AIO and didn't like that it stayed around 80-85c all the time even after a repaste. Temps wig me out.
Have you benchmarked and played any games to see what benefit the extra speed gives you? If it’s not enough for you, I personally, would run it stock.
Your CPU is plenty cool. The x3d chips do have a different max temp though. It's 89C vs 95C on the normal non-x3d chips. The normal chips without 3d v-cache will also boost as far as they can and basically target that 95C max whereas the x3d work more like an old school CPU like your 9900k.
Your temps and settings are fine though. I would double check and make sure you have a negative offset set, because you can also set a positive offset. My settings are PBO and EXPO on and was able to get down to a -32 all core offset. My temps will spike into the mid-high 70's but usually settle around 60-63C in game with my fans set to 1350rpm and an EKWB 360mm AIO.
First time PC builder here, and I was playing around with PBO and CO but I'm not exactly sure if I might have missed a setting or two in BIOS.
PBO was set to enhancement with thermal limit increased to 90C.
CO offset to -35
RAM set to EXPO II @ 6000mhz CL30.
I have encountered zero thermal throttling issues on both prime95 and cinebench. Temperatures averaging around 62C and 78C respectively.
CPU sits at 4.5 ghz for prime95 and stable 4.9 ghz on cinebench. With no stability issue encountered. Final score 17971 but I'm not sure if that's average or not.
Are there any settings that I have missed or should I attempt a lower CO offset since everything is going suspiciously well in my opinion.
Hardware
CPU: 7800X3D
Motherboard: ASUS ROG Crossfire X670E Hero with updated BIOS
RAM: 2x Corsair EXPO sticks
Hey all,
A few months ago my buddies convinced me to move to desktop from laptops and it's been great. I've been attempting to learn how to OC. As someone who's taught/tutored in the past, I definitely understand the annoyance of people asking questions you can find info about online, but I wouldn't be honest if I didn't say I'm having a tough go of learning how to OC. There's just a lot of knowledge that isn't there.
So when I encounter an issue like the one I had, it takes me a long time to troubleshoot. I've attempted an OC of my RAM using Buildzoids timings (so it's Hynix die despite being CL38) which has been fine, and a PBO CO undervolt on the 7800X3D.
I read a post from another user mentioning that if you go with maximum LLC for your motherboard, you can essentially undervolt the heck out of it. His theory was "what you get with the LLC, you take away in CO". I read other users talking about the danger of daily driving with maxed LLC, but my voltages all seemed fine and stable.
Everything was decently good. But I wasn't getting good results in benchmarking software. I know real world use is different than synthetic tests, so I shrugged and felt if I was getting above the average, I was good. In the AI Tweaker section, my CO offsets were pretty strong. Basically, everything was -40.
Everyone has a different definition of 'stable'. IDK how to exactly test it. But for a month it ran fine without crashing, ever. I ran OCCT CPU, CPU+RAM, and Memory tests for a few hours with no errors, and torture tests in Prime95 for like 6, 7 hours. I figured I was good to go.
What changed was one day I noticed I was applying PBO settings in AI Tweaker. I noticed AMD Overclocking was in a separate section. I didn't know there was two! So I set the same settings in both, and then I noticed that while I could run benchmarking software fine, I would crash under specific loads. For me I would crash in OCCT's Ram Latency test. It always crashed when benchmarking L3. I have absolutely no idea why, or what would point to that.
I fiddled with settings so long and crashed every time that I ran my computer stock, and would run a suite of tests after adding things on. EXPO enabled, RAM timings were OK. What crashed it was my PBO CO negative offsets when running it on the AMD Overclocking side. Huh? Even with my old settings of LLC 4 maxed out, I couldn't get anywhere close to -40. Or -35. Or honestly -30.
That being said - My scores improved dramatically. In CB23 I actually hit 18.2-18.5k. I can actually hit higher with stronger offsets (but again, it crashes in OCCT Ram Latency test lol). It was very strange. All of a sudden I was getting the performance uplift I saw people talk about for the X3D chips and undervolting. I was going from below the average score in every program to now suddenly being right in the middle of the average and the top scores, which is good enough for me.
So, all this rambling aside - what is going on? I didn't know there was a difference in the BIOS. Now that I have this, I decided to turn LLC to 3 because I was worried about the voltages (my MOBO goes from Level 1 to 4 at the max) because my offset was so much weaker. My second question is, how can I learn to do offsets per core? I was getting really great results with a strong undervolt, it just wasn't stable in certain other benchmarking programs. If I could learn which cores need less or more, that would be great. But honestly, it really is hard to find certain info out there (for ex, I heard some LLC settings are opposite as in 1 is low, but for others 1 is high. But for my 650 motherboard, literally not a single thread discussing my specific board)
If anyone has info on those two questions I would appreciate it. I also would love to learn more about RAM overclocking but thats a different story (and I've read theres not much of an uplift for 7000 series X3D chips)
Current Specs: Asus Tuf B650M Mobo, 7800X3D CPU, 4080Super Gigabyte WFV2, Teamgroup TForce 32GB of 6000CL38 RAM
-30 all co is cope and you’re most likely clock stretching somewhere.
reset everyhing then go to ai tweaker. enable xpo. overclock memory a bit and tighter timings. LLC at what u wish i wont suggest a level. higher voltage for memory overclock of course. then sonce you got your memory set. then start stress testing each core til it crashes and then back off 1-2. and do that for each core til u got all there maxs. and youll be golden. it takes days btw. days. sha3 will instantly kno if your undervolt is stable or not. goodluck.
Hi guys First time pc builder. Have 7800x3d with b650 aorus elite ax mobo. How to do PBO for lower temp ? Is it safe to do so ? On bios only xmp enabled nothing else changed.
I'm very confused on what I need to do just to get a basic overclock on my 7800x3d to get it from 4.2 to closer to its rated 5.0 speed. I have PBO enabled under advanced/amd overclocking in my bios on my rog strix x670e-e, but hardware monitor in the Asus x670e-e bios still says its at 4200 MHz. How can I see my actual max MHz limit? Is the limit actually closer to ~5.0 now that I have PBO enabled even though it still says 4.2 in the Asus bios?
Relevant Specs
CPU: 7800x3D
MOBO: X670E-F Gaming Wifi, BIOS 2506
CPU Cooler: EK-Nukleus CR360 Lux D-RGB
RAM: DDR5 Kingston Fury Beast CL36, 36-38-38-80, 1.35v EXPO rated kits
2x16GB
SK Hynix A-Die
------------------------------------------RAM part starts here---------------------------------------------------
Overclocking results (RAM)
Note that I have another post for just my RAM OC but I have updated it very slightly so I will include the details in this post which is for both CPU + RAM OC.
https://www.reddit.com/r/overclocking/comments/1ckpm09/oc_kingston_fury_beast_ddr5_6000_cl36_overclocked/
Overclocked from 6000 MHz CL36 36-38-38-80 to 6400 CL30 30-38-38-80It does not show in ZenTimings but I have also put VDDG CCD = 1050mV and VDDG IOD = 950mV.
I do want to raise the point that I previously had BIOS version 2007 and in this version, the VDDG IOD and VDDG CCD settings were only found in AMD CBS (AMD Overclocking) setting in the BIOS. With BIOS 2506 (which I am currently running), these settings can be found in both Ai Tweaker and in AMD CBS. I have set these values in the Ai Tweaker but I do not know if it is better to set them in AMD CBS.
Perhaps someone here on Reddit knows better and can give me some insights?
I could probably tune these to have tighter timings, such as tRAS, tRC, tRP. Keep in mind that I went from 6200 with tighter primary & secondary timings but had to loosen them a little for 6400. I could also probably have a look to reduce VSOC, VDD, VDDQ, and VDDIO a little and continue my stress testing for a few days but I don't have the time and motivation for that... yet :D
Stress testing results (RAM)
| Stress test tool | Time spent | Result |
|---|---|---|
| TestMem5, Exteme Anta777 config | Overnight 9h + Overnight 11h | Passed, no errors. |
| Y-cruncher FFT + VT3 | 10h + 8h (another day) | Passed, no errors. |
| Gaming and regular use | 8 months | No BSODs, no indication of instability. |
| Aida64 | - | 59ns without Safe boot. Removing unnecessary background processes. |
------------------------------------------RAM part ends here---------------------------------------------------
------------------------------------------CPU part starts here--------------------------------------------------
Overclocking results (CPU)
I went full brainless mode and opted to start off with PBO All cores with negative offset of -35.
Same question here to all you guys as in the RAM section, there is two ways of tuning PBO in my MOBO, Ai Tweaker and AMD CBS (AMD Overclocking setting). In this case, I opted for tuning PBO CO in AMD CBS as I did some quick research and people seemed to recommend doing anything PBO related in AMD CBS instead.
If you guys have any views/insights on this, let me know.
Stress testing results (CPU)
I want to preface this by saying that I did extensive stress testing and monitoring of my effective clocks vs "normal" clocks in HWInfo64 in terms of clock stretching. So what I mean here is that I sat and monitored HWInfo64 while doing stress testing for majority of the time (on and off).
I do not do stress testing for 30min and call my system stable. I am extremely against these short stress tests and against people calling their system stable by just testing the system for a few minutes. Some of you might even comment that this is not enough stress testing and I should use more programs. That may be true lol, I am open for suggestions.
| Stress test tool | Time spent | Result | Temps (Celsius) |
|---|---|---|---|
| Prime95 (both default and low-load config) | 20min per core, 10 iterations | Passed, no clock stretching identified. Difference between effective clocks and "normal" clocks were approximately 20-40MHz. Although, Core 0 and 1 seemed to be a bit weaker than my other cores. | Max was 72.4 |
| CoreCycler | 20min per core, 10 iterations | Passed, no errors, no clock stretching indications. | Max was around 70 |
| Y-Cruncher | 20min per core, 10 iterations | Passed, no errors, no clock stretching indications. | Max was 76 |
| Cinebench R23 (just to check score) | - | Score: 18895 | Don't remember actually... |
My idle temps used to be 45-55 degrees celsius (sometimes spiking randomly spiking to 61 degrees) but now it seems to be around 40-41. This just might be placebo/confirmation bias but yeah, I dunno lol.
Another thing that might be placebo is that my system feels smoother and snappier. No facts here that can back this up, this is purely just what I perceive when I am using my PC.
Playing Tarkov, my FPS has been boosted by around 10-15 FPS on all maps. Temps never go above 63 degrees. Although, my effective cores almost never goes above like 3.6GHz (sometimes it hits 4.6GHz maybe) and CPU utilization is at 50-60%. So perhaps some issues here? Let me know.
Overall, gaming experience seems smoother and PC feels overall more snappy. Like I said, this can be placebo or I actually got some slight performance increase complementing my RAM OC with CPU PBO CO.
GPU: RTX 3080 10GB CPU: 7800x3d Motherboard: Strix B650-A BIOS: latest RAM: 32GB Team Group 6000Mhz cl30 PSU: MSI MPG A1000G OS: WINDOWS 11 Pro
Description of Original Problem: I upgraded from an EVGA GQ 750W to a MONTECH Titan Gold 1000W PSU (got it bc it's A tier on psucultists). Started crashing under low load/idle scenarios (desktop, browsing, watching videos). Never crashes during cinebench or gaming. Crashes show bugcheck 0x116 and nvddlmkm.sys crashing according to win dbg. Hours and hours and days of troubleshooting later (including getting a third PSU) and I realized it was the pbo curve.
Changed it from -30 all core to -25 all core and I thought it was stable as my PC went from crashing every 5 min to stable for 2 days, so I thought my crashing was over with. Continued to crash all the way to -23. I could keep going lower but at that point the temp and performance are basically the same as pbo on auto. At -30 gaming temps are 10°C lower and clocks steady at 5050Mhz.
Troubleshooting: I don't need help continuing to troubleshoot. I have done everything in the book. Clean install windows, DDU, reseat all components and cables, background software off, eliminating the riser cable and PSU cable extensions, running sfc/scannow, S.M.A.R.T drive health check, GPU undervolt, updating BIOS and more. I am 100% sure it is the pbo curve. No instability on auto pbo, just higher temps and lower clocks.
NOW ONTO MY QUESTION: I have no experience with prime 95 or corecycler. Would running this benefit my situation? If I run these and single out crashing cores at high load would that even conclude that those are the same cores that are crashing under low/no load? I want to get close to that -30 all core or even a per core curve. Should these software even be my next test?
I was one of the people who commented to turn off CO and DDU on your last post, and seriously, stability is stability, you're gonna have problems if it's not stable. If temperatures are a problem then power limit your cpu.
for reference, on my 5950x, set per core, my worst core CO setting is at +6. That's what it takes for stability. I have put hours into stability testing my system and it is rock solid and I absolutely never crash. If you're okay with crashing and system corruption, go ahead and ignore stability testing, but you have seen the results. Don't expect to sit anywhere near -30 on all cores when all is said and done, if you want a truly stable system. (I will note a lot of people like to just stick all their cores to -30 and never stability test and talk loudly on reddit about their cinebench scores and that makes a perception that it's all fine and loads of people can do -30 co on all core and they are wrong)
with that said, I recommend corecycler, prime95 large ffts test. It's been a while but I think I did 25 mins per core for curve optimizer stability testing. I did 3 runs and when all cores passed 3 times, I consider that stable
While some people say they just set CO -30 all cores and it works perfectly fine, it may not be fine, they just have not found a trigger that crashes the whole thing.
As for Corecycler if you have some free time to run it, would not be a bad idea to try and find the best values for each core.
Hey guys, I'm new to all this so please do correct what I'm doing wrong
I got a 7800x3d with Asrock x670E and DDR5 6000 CL30, and I'm trying to enable PBO on it but can't seem to get anything out of it
Cinebench score is the exact same with PBO - Disabled / PBO - Enabled / PBO - Advanced with 200+ and offset -30, -30, -6, -14, -19, -26, -16, -23 and temperature is around 63C with all of the settings with voltage maxing at 1.000.
If anyone could point to me what I'm doing wrong that would be appreciated
Prime95 Torture test on7800x3d is locked at 5,050mhz max, you can do some overlocking with bclk or eclk if you have it but honestly its just not worth it.
PBO will drop your temp but it won't help it boost unless you were thermal throttling.
Couple of things.
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The CPU frequency offset doesn't work in the positive direction with X3D chips. It is fused at 5050 max. If your motherboard supports it, you can use asynchronous clocks to force the frequency and whole curve up. Kinda like curve optimizer but it shifts the whole thing including the max frequency. If you set it at 104, that would be 4% and new max would be 5250. I tried all of this, made it through a few stress tests to my satisfaction and then crashed while watching YouTube. My point is it's extremely finicky even more than curve optimizer and the chances you're stable across all workloads is slim even pushing it just low enough to see a change. If it's so low, like 101 you're much better off just using curve optimizer. And to get 106 or something you need a positive curve optimizer offset which I'm pretty sure doesn't work with these chips.
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those curve optimizer values, where did you get those. I'm just making sure you didn't try to copy somebody else here and you tested these. Tested in what?
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cinebench may not show much of an improvement but that is just one workload. It could not show an improvement in cinebench but then show one in Geekbench. It really just depends. You should see some difference though even if it's just 100 points, no?
Personally I just ended up sticking with curve optimizer because of the instability.
I watched optimum's video and after it I expected slight reduction in temps and power package but it was the opposite. Is it normal for 7800x3D? What's the math behind it?
Here are my results:
Someone told me it might be worth messing with (lowering it).
https://i.imgur.com/9csWOSa.jpg
any suggestions as to what i should set it to, or do you think it's not worth changing?
Thanks
I just built a new pc the other day, it has a 7800x3d on gigabyte b650 elite ax. I was trying to set a negative pbo on it and basically I have some questions. So basically in the advanced settings of gigabyte bios there is a spot to turn on and configure pbo. In here you can set multiple different settings including what sets the temp limits, thermal trottle limit and curve. In here I have my curve set to a negative 20. However in the normal tweaker menu, there is a single pbo option that has a ton of choice. It goes by 70 - 80 - 90 celsius options with levels 1 to 5 for each temperature max. Do i need to enable this alongside pbo in my advanced settings or is this tweaker setting like a basic version? thanks
Computer Type: Desktop
GPU: nitro+ 7800xt
CPU: ryzen 7800x3d
Motherboard: gigabyte b650 elite ax
BIOS Version: cant remember, newest version for my motherboard
RAM: 32gb t-force ddr5 6000
PSU: season focus gx 750 gold
Case: lancool 216
on windows 11
Im pretty sure its just a basic version but ive also struggled to confirm this. Im curious to know if anyone can confirm either way
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Components: Cpu: 7800x3d Gpu: 7900xtx Ram: 2x16gb cl 30 6000mhz Motherboard: Gigabyte B650m Elite AX
Settings: XMP Enabled: Expo 1 6000mhz PBO Limit: Motherboard Curve opt.: All Core -30 Cpu AIO at 100%
With the above settings i see my pc cpu edging at 4.9-5.03 GHZ on 10 min Cinebench R24 without crashing with temps under 77°C.
I also noticed one instance where a couple cores had max boost of 5.33 GHZ.
When i tried testing Cinebench on GPU however, the program crashed a couple times but worked after a restart.
Wanted to stress test CPU with OCCT but just opening the program crashes my pc completely, even without running any tests. Is this an indication that my CPU is unstable? Note i didnt even run any test on occt, just unable to open the program without it crashing my PC.
What would be a reccomend direction for me to proceed IF my CPU is unstable.
Insight would be appreciated!
Did you test if you even get performance out of it or if just Clock Stretching is doing its throttling?
The frequency numbers you see are meaningless if the internal clocks are throttled because of instability with the silicon.
My 7800x3D in Cinebench_R23 from today | back-2-back runs => https://imgur.com/a/kgD98hv
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PBO -30 CO (OCCT and core-cycler tested for a few days)
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19555
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19553
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19530
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STOCK
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18437
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18390
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18358
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Temps are <80°C with a Noctua D15 (AM5 offset kit + KryoSheet instead of paste), just as stock.
-30 CO should get you above 19k CB_R23 if the silicon has any headroom for frequency.
-25>-20>-15 etc