mvmiller12
[H]ard|Gawd
- Joined
- Aug 7, 2011
- Messages
- 1,536
I'm planning on rebuilding this thing for a few reasons:
Even after I did my best to clean my loop, I'm seeing debris in my CPU block, so it needs a clean.
I've heard that GPU PCBs are cracking so I bought a new vert PCIe4.0 GPU mount.
I want to update my storage while I have this thing apart so I bought a 4TB 990Pro to install while I have it in pieces.
Has anyone lapped a 7800X3D? I'm tempted to have a crack at it while I have it apart to take maybe 1mm of the height of it. I'm not particularly impressed with the temps on this CPU and how quickly it climbs to max temp. I've never seen a CPU temp spike so quickly in this loop and I suspect it is the super thick IHS to blame. My GPU sits at around 50C while gaming but fan speed is based on CPU temps. This usually isn't an issue for gaming as CPU temps remain fairly low but for something dumb like looking through youtube the temps spike and fans start ramping which is absurd.
AM5 CPUs almost always shoot right up to max temp under any kind of load. ALL of them do it. It's a deliberate design decision by AMD. Der Bauer did a whole thing on it back in early AM5 release days. Lapping the CPU die is unlikely to make much difference for you, but he had great success de-lidding the CPU and going with direct-die cooling. De-lidding a non-X3D AM5 processor is pretty straightforward, but I am unsure how much of a complication the 3D cache adds to the process (if any). Might be worth looking into if this is a thing you are very intent on fighting without sacrificing any performance.
Alternative (and what I do): Use PBO to limit the CPU to 105W or 65W. I limit my 7950X to 105W, and the performance difference is only 5% give or take a few points depending on the task, but temps and power draw sit a bunch lower. I know you can't use PBO to OVERCLOCK an X3D CPU, but I have not heard if it can be used to power limit those CPUs or not.