PSU for Sapphire 7900XTX Nitro+

kjaerligkatt

kjaerligkatt

kjaerligkatt

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24 Feb 2021
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Location
Norfolk
Next week I have a 7900XTX Nitro+ arriving. I do plan to change my PSU soon, although ideally had intended to change it if a few months when I replace my MB and CPU. The current set up is:

Asus STRIX Z490 MB
Intel i5 10600K
16GB HyperX Predator 3200MHz
Sapphire 6800XT Nitro+ OC SE
2 x 1TB M.2 NVMEs
Asus ROG 750W PSU

The current PSU is smaller than I intended, but had to be replaced at short notice during the height of component shortage due to my Phanteks 1000W being faulty. The Asus 750W was intended as a fill-in until I could get something more suitable, but tbh has worked perfectly well with the current kit, so had no need to change.

According to Sapphire, the recommended PSU for my 6800XT Nitro+ is 850W, and for the 7900XTX Nitro+ 800W!!!

So, am I safe to stay with the current PSU for now, and change it when I upgrade to a Z690/790 + 13700? At that point I'll probably drop in an Asus Thor 1000W+ PSU, or should I just get that now to be safe? Advice appreciated :-)
 
I'd stick with the ROG even after the upgrade, it is a decent PSU with a long warranty, so don't see much point changing unless it's having problems.
 
Should be fine. Some PSUs may struggle with spikes, but if that model can deal/dealt with them without issues, I’m confident it will be fine. Total power under load won’t be anywhere close to the PSU capacity, and despite small loss in efficiency when going over it, is quite common for good PSUs to supply 10-20% over their rated capacity before shutting down.
 
Here's another thing, tbh I wouldn't be upgrading my PSU right now unless I had no other option, because I'd want to be getting a ATX3.0 PCI-5.0 unit, and availability is sketchy at the moment. There's also the issue with any new tech, there might be some teething problems with 3.0 so best to wait a while.
 
Darujhistan said:
Here's another thing, tbh I wouldn't be upgrading my PSU right now unless I had no other option, because I'd want to be getting a ATX3.0 PCI-5.0 unit, and availability is sketchy at the moment. There's also the issue with any new tech, there might be some teething problems with 3.0 so best to wait a while.
Click to expand...

The £360 Thor the OP refers to is ATX 3.0, I think (or at least, it has a 12/16 pin) :) Not sure what the difference is, but they seem to be marketed with a II (Thor II).
 
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