700w passive enough for zen4/raptor lake i9 + 4080/4090?

Soldato
Joined
13 Mar 2006
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A bit out of the loop hardware-wise and a bit of a funny, specific question I have... I'm looking to upgrade my PC later this year when the next gen of GPUs and CPUs come out. It's for a completely fanless (hopefully no psu fan!) system(see sig if interested).

Can I realistically run the upcoming raptor lake i9 CPU overclocked (?350w) plus say a 4090 overclocked (?500w) and say 2 m2 ssds and a 20w water pump on a 700w seasonic prime tx700w/silverstone nj700 700w(rebadged seasonic) passive PSU (with added water cooling on the psu)? I'd be adding a large watercooling block to the base of the psu, which for previous watercooled fanless PSUs adds ~200w to the PSU capacity, so I'd guess call it 900w capacity plus the safety overhead on wattage seasonic give, but reviews haven't tested, annoyingly!

My understanding is from reviews of seasonic prime tx700w fanless the conponents/psu is rated for more wattage than specified for (? is it the 850w or 1000w seasonic prime tx series, but with bigger heatsinks and no fan?).

I've been running an old system of overclocked i750 at 4.2GHz (~250w I think) plus crossfire 290x (600w+?), 18w pump, 5 fans, 2 hdd off a Seasonic x750 psu quite happily (reviews at the time stated it has significant overhead over the stated 750w), so wondering if the 700w passive PSU is possible, or whether you feel it's a terrible idea and to go for say the corsair ax1600i. Thanks for any advice!
 
Ax1600i ordered! Exciting times - hopefully can add some passive cooling to it so it can run basically fanless anyhow - fan only comes on past 650w total load (from testing at 38-48C ambient) Tomshardware AX1600i testing - the ability to adjust the PSU fan profile via a micro-USB port and software excites me far more than it should.
 
I would have waited to buy an ATX 3.0 PSU

Now you'll be running adaptor pin cables to future GPU
Yes, and that doesn't bother me at all. A titanium efficiency 1600w PSU will still be a titanium efficiency PSU even if it needs an adapter cable... Or more accurately, the re-cabled cables will need one more recabled cable...

Besides which, I'd imagine the newer cable without the need for an adapter will be available from Corsair anyhow.
 
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