1000 watt PSU not enough?

[naefeart]

PC spec:

Intel 7900x overclocked to 4.7ghz
ASUS x299 Rampage Apex motherboard
360mm AIO with 3x fans
16GB ram (4x4 GB Corsair sticks)
12GB nVidia Titan Xp
1x NVME SSD
1x SATA HD
3x case fans
1000W Seasonic Titanium PSU

The computer minus GFX was built and overclocked by OCUK. It’s just over 3 years old and everything runs perfectly.

I recently replaced the GFX card with the following:

Sapphire 6900XT Toxic Extreme with 360mm AIO and 6x fans

I then started to get reboots during the standard 3DMark benchmarking. Temps for GFX and CPU were all fine with no spikes. Same would happen in games like Control, 20mins in and the PC would fully reboot with no error messages or anything.

I replaced the PSU with a 1300W Seasonic and all is fine. However I’m wondering if my old PSU should have been sufficient for my setup or if it has become faulty. Interested to hear people’s thoughts.

 

[naefeart]

There's no direct comparison but the Xp is the bigger brother to the 1080 Ti: https://www.techpowerup.com/review/amd-radeon-rx-6900-xt/31.html

The 6900 XT does use more power but only around ~50W odd. However looking at the 6900 XT you have it seems to be overclocked pretty heavily so that could cause it to use much more power than a normal 6900 XT would use. That mixed with the overclocked CPU is probably enough to cause the 1000W PSU to trip.

Hmm so the figures I looked at also suggested 1000w should be fine, but I have seen owners suggest this CPU and GFX card do pull a lot more when overclocked as you mention. Still nothing definitive, so I guess I’ll need to check and make sure the old PSU isn’t faulty.

 

[naefeart]

these new GPUs have high transient spikes which can trip the protections.

"Older Seasonic Focus revisions (made before 2018) had transient sensitivity issues. Some new SKUs are not affected because they were released later (Seasonic Focus GM/GX/PX refreshes, Phanteks AMP, NZXT C/E etc.)."

https://linustechtips.com/topic/1116640-psu-tier-list/

That’s interesting info. I can’t see a manufacturing date on my 1000W Titanium -bought March 2018- but it doesn’t appear on the list of those affected.

 

[naefeart]

If it was bought in March 2018 then it's a good chance it was manufactured pre 2018, it just may not be on the list as no one has reported any issues yet etc.

Indeed, that’s a good point. I guess I’d better give cs a shout and see who wants to decide how I raise an RMA for this unit to get checked over. Cheers guys.