I had previously undervolted my 5900x following a great guide in this sub, now aiming to get my 9800X3D in a good spot. My main goal is efficiency over stock with cooler temps / less power and higher scores and I've watched who knows how many videos from good channels (buildzoid / etc) and not so good ones. I've landed on what is a pretty achievable UV and OC for most of my friends with the same chip and wanted to share a few things I took away from all of the guides.
Here are the videos I found the most helpful and my stability results / performance benchmarks confirmed their info:
Buildzoid https://www.youtube.com/watch?v=IYK0hxQqCoA I didn't go for Buildzoid's most extreme memory timings, but was able to get a 65535 interval w/ 1.2V SoC which I'm very happy with – amounted to a 10% increase in scores with very little increases to power / heat over my original 1.15 SoC. 1.15 SoC was not stable w/ 65535
Kleo Yan https://www.youtube.com/watch?v=IYK0hxQqCoA Great advice wrt power draw and curve shaping, as well as SoC limits for chip longevity. I largely followed this video for my first UV and power limits. While the first settings cleared OCCT and YCruncher, they crashed after about 5 mins in AIDA64, all in all I found AIDA64 to be the easiest thing to crash an unstable setup along with Core Cycler on YCruncher for AM5.
Blackbird https://www.youtube.com/watch?v=9y_MGzrQHDg I did not follow all of his recommendations as he sets MoBo power limit, but he has really good performance charts for each individual step as well as the better stress test setup for stability.
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Don't use the scaler
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I personally don't recommend to use MoBo power limits, nor does it increase my R23, R24, Time Spy scores dramatically, but it does take way more power and generate more heat. Is that the best way to get the highest score, sure – but as I'm going for efficiency and don't have air conditioning, the default limits were the best balance for me.
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I landed on a better score with a 100 boost than 200, with less heat / voltage, definitely play around with this and see how your % performance weighs your temp / heat
The two stable setups I ended up with are:
- EXPO 1: High efficiency, Tightest memory timing , 65535 DRAM Interval
- CPU Core Voltage: Offset Mode – Negative – .0500V
- CPU NB/SoC: Override Mode – 1.2V
- PBO Core Boost: 100
- PBO: All Core – Negative 20
- PBO Curve Shaper: -10 on all Med Freq, -5 on all High Freq, nothing on Max Freq (if you can get away with -15 on Med, -10 on High, and -5 on Max that was what was recommended, but my chip couldn't clear 5 mins of AIDA at that range).
This setup gave m:
- R24: 1395, 70C CPU TCTL/TDIE
- R23: 23,515 maxing at 72C CPU TCTL/TDIE
- Time Spy: 25128, 64C CPU TCTL/TDIE
The other setup is the exact same with no core boost and resulted in 23,715 65C and maxing 120W. I'll be sticking with the first setup as most of my games are GPU bound and won't even hit 61C such as Deadlock, Valorant, etc. My next step is to undervolt my NVIDIA card. Anyway I hope this helps!
Before Undervolting with the only MoBo setting being enabling EXPO on ram:
- R24 – 1343, 74.4C CPU TCTL/TDIE
- R23 – 23014, 79.5C CPU TCTL/TDIE
- 3D Mark Time Spy – 24858, 72C CPU TCTL/TDIE
My system is a
- 9800X3D
- 5070 TI OC
- G.Skill DDR5 6000 32GB CL30
- MSI 870e Tomahawk
- Arctic Liquid Freezer 3 Pro 240 – Exhaust mounted on top
- Fractal North w/ 2 Noctua 140 Intake fans and 1x 120 Exhaust