

Sharing something I found while shopping for a used P104-100 that might help others here.
I tested two different P104-100 units (same model, same seller's test rig: i3-9100T, 16GB RAM, driver 531.41) on Unigine Superposition 1080p Medium:
Unit A: OCCT VRAM test showed 337 WHEA errors within 2 min 28 sec. Superposition score: 3837 (avg 28.7 FPS)
Unit B: OCCT VRAM test showed 0 errors over a full 15 min run. Superposition score: 11641 (avg 87 FPS)
Same GPU model, same test system, same driver. The only difference was VRAM health, and it caused a 3x difference in score. For reference, a GTX 1070 with a mild OC scores around 13683 on the same test, so a healthy P104-100 lands surprisingly close to that.
My takeaway: if you're buying one of these off Marketplace/FB, always ask the seller to run OCCT (GPU > VRAM > 90% dataset > 15 min) before you commit. The visual/physical condition tells you nothing about VRAM health, and the performance gap between a healthy and degraded unit is massive.
Happy to answer questions if anyone's going through the same buying process.