Raijintek for psu choice? Finalizing 5090 build

Posted by Guitarshot@reddit | buildapc | View on Reddit | 12 comments

Hello, my retailer said nzxt brand is problematic right now and he's not anymore in contact with them.

He's offered me some other options at a similar price:

1) Raijintek ampere 1200w bl (standard cybernetics, does 45db at 900+ watt, how likely am i to go up there at 4k 240hz with a 9800x3d?)

2) Raijintek cratos 1200w (A- cybernetics, atx 3.1, 12v2x6 native, both of these were in the best psu 2025 of hardware buster towards the 92-93 points but there really isn't much information, though this seems to be the best one)

3) Thermaltake GF3 1200w (standard cybernetics, seems solid and is A tier on cultist, but is 3.0 and loud)

4) Be quiet! pure power 12m 1200w (48db at 900w wtf, standard cybernetics, 3.1 atx, 5.1 pci with native 12v2x6)

5) Enermax revolution d.f.x. (3.0, standard cybernetics, doesn't seem to have anything over the others)

Which should i choose? Anything i should be considering over noise and position in cultist/HWBusters tierlist? I don't mind the efficiency too much, just want it to be stable at high watts, the gpu should do 30 to 36 db at max load so i was hoping to get a psu around that noise range. Also newer connector is nice, but from what i understand it doesn't matter a lot.

Ty!

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BenFloydy@reddit

Not sure I'd trust a brand that was literally telling me to take a rain check.

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BenFloydy@reddit

More seriously, you dont need 1200w PSU. Dont believe the hype.

1000W is more than adequate unless you're doing something very unusual.

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BenFloydy@reddit

Presumably I've been downvoted by someone from the PSU marketing industry. 😁

Honestly, do the maths. Tell me where you're using the extra 400W. 😁 I can tell you where you're not.

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Sudden-Most-8214@reddit

PSUs have the best of their efficiency when they're working between 50% and 70%

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BenFloydy@reddit

Not strictly true (especially the minimum), but I'd accept 0%-80% (Corsair produce some nice graphs of this comparing their models).

Also worth noting that the fan noise levels do tend to increase noticeably with higher wattage models relative to the absolute wattage, not the % wattage (so no gain there).

Bur realistically, with 1000W PSU OP was going to be under 70% anyway imo.

Would be very interested to know what the final build measured socket sustained-peak wattage was. 🙂

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Guitarshot@reddit (OP)

Which brand? Well, as i've said i'm going for a quieter pc, psu runs better when not at 90% capacity, my part picker says i'm at 852 watts without counting the monitor and peripherals. So maybe i could, but why risk it?

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BenFloydy@reddit

I was just making a facetious pun about Raijintek.

Nothing wrong with a 1200W PSU as such but you're honstely likely about 550W over likely real world usage, so dont limit yourself or pay over for it.

People are running 5090 rigs on 850W PSUs with headroom.

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Guitarshot@reddit (OP)

Do you mean with undervolt? Well you'd likely not run the gpu at high wattage if you play competitive games at lower than 4k, where the cpu bottlenecks you first. But from what i've seen the 5090 pulls 600+ watts when it's at max load. I could undervolt it i suppose, that seems to use 200w less or so. Sorry that i missed the pun lol.

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BenFloydy@reddit

No out of the box.

Yes the GPU can pull 600W, but its the rest of the calculation people over estimate.

Things people generally overlook -

The partpicker estimate (and almost all gpu manufacturers recomnemdation minimum) is a max load calc, not a running wattage.
Its very unlikely your CPU and GPU will be at TGP at the same time, this almost never happens.
Decent model PSUs will be able to handle at least 200% spikes.
Decent model PSUs will run at at least 120% rated wattage for prolonged periods.