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

Monkey Puzzle

Monkey Puzzle

Monkey Puzzle

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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!
 
I wouldn't try it on current-gen stuff and the rumors / leaks are saying next-gen GPU's are going to be even more power hungry.

And it's not just the high TBP numbers (for Ampere at least.) The power spikes have been tripping OCP in a lot of otherwise high quality PSU's that meet the recommended power numbers. EVGA has a thread of which PSU's work...basically a lot of community trial and error.

Alderlake's performance is great, but the i9 pulls a lot of power in productivity workloads. (Have not payed attention to raptor lake leaks about power draw.)
 
Trouble with Ampere is the spikes. They can spike with big power draws. And the i9 had a huge draw, don’t see Raptor Lake being any different. I would personally want to upgrade the PSU if it were me, looking at a system like that.
 
Monkey Puzzle said:
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!
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As the others have said, it's the spikes that'll get you. 700 watts just isn't enough for a high end card such as the 4090 when the item can spike really heavily and trigger over current protection. AX1600i is total overkill for what you'll need but sometimes going overkill is better than pushing your luck. A fanless titanium rated 1200 watt PSU should be enough (maybe even a very good titanium rated quality 1000 watt would be enough but adding the water cooling and all that does add up).
 
JollyJamma said:
700 watts just isn't enough for a high end card such as the 4090 when the item can spike really heavily and trigger over current protection.
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Aren't rumours of next top graphics cards putting their power draw alone toward 500W level?
So transients are likely at 600-700W level.

And Intel's advertised TDPs aren't nowadays anymore reliable.
 
If you want a fanless PSU to run this theoretical system, are you prepared to use multiple 480mm radiators with slow-spinning fans to cool it all? No point going for a silent PSU if you don't have silent cooling.
 
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.
 
Monkey Puzzle said:
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.
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I would have waited to buy an ATX 3.0 PSU

Now you'll be running adaptor pin cables to future GPU
 
Grim5 said:
I would have waited to buy an ATX 3.0 PSU

Now you'll be running adaptor pin cables to future GPU
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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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Monkey Puzzle said:
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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This ^ 100 times this

The new standard is not exactly coming out in many PSUs and an AX1600i will be of use for many years to come before all graphics cards have switched over to the new standard.

I have the founders edition with that new 12 point plug and look at how many PSUs switched over to that new standard immediately. Very few.
 
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