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Old 08-04-21, 04:11 PM
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demonking demonking is offline
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Hadron Air and i9 9900k

Hi all,

Need common sense opinions. I have done several different PSU calculators and all seem to say I am well above requirements but my logic and experience says that these aren't right.
The Hadron is stuck with its 500w PSU as finding a good Flex ATX PSU to replace it with seems both difficult and expensive and I am just concerned that the PSU in the case is not going to be up to the job.
Not all parts brought yet but the end system should end up around the below

i9 9900k
Aurous z390i Pro Wifi
Palit gtx 1070 dual
a single m.2 nvme drive
2 non rgb 120mm case fans
2 dimms most likely 8gb models probably 3600mhz
and an air cooler, currently undecided either the Cryorig c1 or noctua NH-U9S

My head says 500w is going to be pushing it a bit but this might only be a temporary system depending if I can successfully mod the case later down the line by taking out the HDD cage and putting in a bigger PSU in its place, as I am on a budget (I got the i9 and Mobo for a steal) this might not happen for a while and i'll need something to keep me going until I can afford to do this.

you guys think i'll struggle? not planning on OC'ing at all really as the case is not really up for it

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Old 08-04-21, 04:31 PM
grec grec is offline
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I think it'll be fine mid term
The PSUs rated 40 A on +12 V rail means 480 W for the power hungry bits

The 9900K seems to have a max of 205W draw to the CPU and Palit 1070 is capped at 217W, giving 422W internal draw for the main bits.

NVMe drives are capped at 7W max, chipset and key gubbins will rarely go over 10W, though possibly rarely abit closer to 20W with everything else if the WiFi is on. RAM sticks will come in around 3W each. Each fan should be firmly under 1W each if 120mm non-RGB. So say 40W max for all of the rest to be super safe.

Gives you 460W, tight, but that's assuming the rig is running 100% full pelt, Prime AVX on the CPU with a heavy workload on the GPU, chipset running full whack with WiFi ect all at once. Given without overclocking, gaming loads will likely come in around 60% of this, I think you should be safe for a couple of years while the PSU securely holds its rated capacity. Issue is of course, it won't take too much wear and tear to start hitting instability if talking longer term, though not sure how over-spec'd these EVGA PSUs are.
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Old 08-04-21, 05:43 PM
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demonking demonking is offline
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Quote:
Originally Posted by tgrech View Post
I think it'll be fine mid term
The PSUs rated 40 A on +12 V rail means 480 W for the power hungry bits

The 9900K seems to have a max of 205W draw to the CPU and Palit 1070 is capped at 217W, giving 422W internal draw for the main bits.

NVMe drives are capped at 7W max, chipset and key gubbins will rarely go over 10W, though possibly rarely abit closer to 20W with everything else if the WiFi is on. RAM sticks will come in around 3W each. Each fan should be firmly under 1W each if 120mm non-RGB. So say 40W max for all of the rest to be super safe.

Gives you 460W, tight, but that's assuming the rig is running 100% full pelt, Prime AVX on the CPU with a heavy workload on the GPU, chipset running full whack with WiFi ect all at once. Given without overclocking, gaming loads will likely come in around 60% of this, I think you should be safe for a couple of years while the PSU securely holds its rated capacity. Issue is of course, it won't take too much wear and tear to start hitting instability if talking longer term, though not sure how over-spec'd these EVGA PSUs are.
Thank you kind sir. I had figured it might be alright and that the 322 Watts I was getting on the calculation was based off Intels dodgy tdp and real use cases
Planning eventually to take out the hdd cage and put a psu in its place so as to gain a higher power ceiling and give the gpu more air to breathe.
Might try undervolting too but I will have to see, I know those chips are very power hungry and may prove to be a fruitless exercise.
Thank you again
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