HP Z4 G4 - RTX 3070TI

[ALIKO85]

Just to wrap things up for anyone coming across this in the future:
After a few white hairs and a couple of hours of troubleshooting, everything turned out great in the end! I’ve included a few photos for reference. Hopefully, they’ll help someone down the line.

A few things might be worth noting if you’re doing this yourself:

1. I tested both the CableMatters and the original HP 6-to-8 pin adapters — both performed flawlessly, even under stress testing.

2. The HP pin connectors are really short and rigid, especially the 8-pin side, which has a cap that seemed almost unbendable. I carefully pushed it back and bent it slightly—and was still able to close the side panel without any issues.

3. The case pins on the GPU bracket can be a pain. Be careful not to damage your GPU. Make sure to align everything before pushing the card into the x16 slot.

4. The 750W PSU with dual 6-pin connectors is more than enough to power the RTX 3070 Ti.

5. Performance reference @1440p in Warzone (Ultra settings):

   • Average FPS: 155

   • GPU Temps: 60–64°C with the side panel closed, ~58°C with it open.

   • CPU Temps: 65-70°C
   • The GPU and Xeon W-2133 with dual channel 32GB 2666 ECC seem to really like 1440p—both were utilized around 70% during full gaming sessions.
   • pin connectors are really short and rigidThe pins on the GPU bracketHP 6-to-8 pin adaptersI carefully pushed the cap back

[SDH]

ALIKO85,

Kudos to you for taking the risk (and your wife's advice) and getting this done. I'm sure many others will follow your lead.

A little tip on your genius idea to shift the heat shrink tubing (with its visible internal round ferrite core) up and away from the 8-pin plug end of the adapter so you got just enough extra flex at that end of the adapter's wires to be able to close the case cover.

The 6-pin plug end does not have a ferrite core, and its heat shrink tubing can stay where it is. The tip is that the heat shrink HP uses on the adapter is not adhesive-lined so you can use the low setting on a heat gun (or the high setting on a hair dryer) to get the heat shrink to soften up enough to easily slip it up and away from its original position to what you show in your last picture. Thanks!