Hi For i9-10900K overclocked and RTX 3090 do you advice 850 W or 1050 W PSU?
¨From the above thread. Jonnyguru, well known PSU expert, high up at Corsair PSU division, used to run a reknowned PSU review site. I also know for a fact certain high end EVGA and Seasonic 850w
PSU's have been causing some people problems with 3090's.
Some 850's work. Some don't. Most 1000W's do. Maybe that's where the confusion is coming from.
The problem is not the ability to deliver power, per se. A good 850W should be able to deliver and sustain an 850W load. The problem is, and this is what "calculators" and reviews aren't taking into consideration, is that Ampere series cards have these transient spikes that are so hard and fast that you need an oscilloscope to capture them. Some PSUs have enough capacitance in their secondary side to power these spikes before the supervisor IC even knows it's happening. Some PSUs see the spikes as noise and shut down to protect the PSU. It's really a crap shoot.
Check out the 20ms spikes here over 500W! I know its a custom model and the Founders is lower, but still.
MSI's GeForce RTX 3080 Ti Suprim X comes with a huge triple-slot cooler that's 33 cm long. Its large factory OC makes the card faster than even the RTX 3090. Thanks to great fan settings, the card is the quietest RTX 3080 Ti tested today, even quieter than the watercooled ASUS STRIX LC.
12900K with power limits removed can hit over 350 watts stress testing:
The Intel Core i9-12900K is Intel's flagship processor for the Alder Lake architecture. In our testing, we saw fantastic gaming performance from this new processor. Not only low-threaded tests have improved, the 12900K can even beat AMD at highly threaded workloads.
12700K almost hits 350 watts with power limit removed too.
With the Core i7-12700K, Intel has released a formidable competitor to AMD's Ryzen 5800X and even 5900X. Thanks to eight powerful Golden Cove cores, the processor handles all workloads very well, including gaming. Compared to the i9-12900K, it runs almost as fast, but much cooler, with better...
Now the above is worst case scenario for power consumption, but personally I want to be able to cover the worst case scenario comfortably with my builds and have the option to do some overclocking if i fancied. For myself I'd be leaning towards a top quality 1000W PSU for a 12900K/12700K(F) with a 3080Ti and certainly for an RTX 3090.