Question 750W PSU can't handle RTX 3080?

[brandonc0431]

Hi! So like the title states, I'm under the impression that my Corsair RM750x is not able to keep up with the addition of my new Zotac RTX 3080 Trinity. I've posted this issue in other forums but haven't gotten to a reasonable conclusion as of yet. The main issue I'm facing is that my computer will completely power cycle at random when under load. I've attempted to solve this with fresh driver installations, Bios settings reset and more. I tried plugging my computer directly into the wall because I thought maybe my surge protector was getting saturated even though it's rated for 1875 Watts. At first I thought this solved my issue as I went a full 24 hours without a shutdown, then it happened again... I tried reproducing the issue to test certain fixes but I have been unable to do so. My computer has only shutdown during gaming at random times. I cannot get it to shutdown in a benchmark. For reference, these are the benchmarks I've run: Time Spy Extreme, Heaven, FurMark, OCCT Power Test, and I also ran Cinebench and Prime95 to make sure I wasn't imagining it was a GPU related issue. Like previously stated, I couldn't get any of these to shutdown my PC. So, part of me is unsure if this is even a PSU related issue. The solutions I have been recommended have all been for the case of people BSODing or crashing to desktop for I suppose GPU instability at 2+ GHz or driver issues. I haven't had this issue so I don't believe I'm facing the same problem as those folks. I would also Like to note that my PC previously worked fine with my Gigabyte RTX 2080 Gaming OC. Here is a list of my core specs:

• CPU: I7-9700k (stock clocks)
• AIO: Corsair H100i RGB Platinum SE
• GPU: Zotac RTX 3080 Trinity (Stock Clocks)
• RAM: 48 GB Corsair Vengeance RGB Pro @ 3200 MHz
• MOBO: MSI MPG Z390M Gaming Edge AC
• PSU: Corsair RM750x

I should also note that I don't think it's an overheating issue considering that with a good aggressive fan curve, my 3080 doesn't go above 74 C (which still baffles me as some folks claim they don't go above 65 C with stock settings on the same card as me). My CPU temps I believe are also not the issue, although it does run quite hot (70 - 85 C under load) despite regular remounting of the water block with thermal paste reapplication, but I suppose that's an issue for another thread. If you have any insight into this issue beyond the basics, I would greatly appreciate your help, I would like to know as definitively as I can if it IS or IS NOT my PSU that is causing the issue before I go out and replace it. I know it can't be said for sure if that's so, but I'm sure my problem can be narrowed down greatly.

 

[maqjav]

Understood
I will look for a new PSU then.
Thank you,