Journal #8527

Posted 5 years ago2015-03-29 20:43:32 UTC
Alberto309 Alberto309weapon_spaghetti
I need help on Power Supply Units (PSU).

I need your help choosing a proper PSU to power this computer:
  • Intel Core 2 Quad Q9450 LGA775 "Yorkfield" 2.66Ghz 12MB-cache (1333FSB).
I would like to overclock it to at least 3.20Ghz. No worries, I have a Zalman CNPS9700-LED CPU Cooler. ;)
  • Asus Rampage Formula Intel x48 PCI-Express DDR2 Motherboard.
  • OCZ Gold Edition 4GB (2x2GB) DDR2 PC2-8500C5 Dual Channel (OCZ2G10664GK).
  • XFX ATI Radeon HD 5870 1024MB GDDR5 PCI-Express Graphics card.
  • Maxtor STM3320614AS 320GB HDD SATA.
This computer has been donated to me by a kind friend, so I would like to power it with a quality PSU. The total power consumption for this rig is exactly 402 Watts.
I was looking for 80 Plus Bronze Corsair PSUs. Here is the only available choice for my budget:

http://www.eprice.it/alimentatori-CORSAIR/d-4625640 for 66,79€.

If this isn't enough, I've looked for this:

http://www.eprice.it/alimentatori-CORSAIR/d-5246873 for 95,29€.
It's way too expensive, but there are no other choices on the site (damn 80 Plus "Gold").

Do you think I can handle the whole thing (with the overclock) with the first PSU?

Thanks to all in advance. :)

11 Comments

Commented 5 years ago2015-03-29 21:16:46 UTC Comment #67472
If you know with a certainty that the maximum consumption is exactly 402 watts, get any one that produces more than that. The cheapest ones might produce less than they advertise though, so don't get the cheap junk.

I suppose the first one should do just fine. Doesn't look like cheap junk.
Commented 5 years ago2015-03-29 21:31:19 UTC Comment #67475
Of course not, SugarMan. That's why I've chosen that. :)
The main problem is the overclocking process. I do know the exact power consumption, but just with the default CPU's clock. That's my dilemma. :(
Commented 5 years ago2015-03-29 21:52:56 UTC Comment #67473
I don't think it would be a lot more. 500W should have you covered.
Commented 5 years ago2015-03-30 02:33:15 UTC Comment #67468
Yeah you want to go 402+15 or 25% (460-500). Standard Engineering practice. 500 watts should do nicely and give you breathing room for future expansion.
Commented 5 years ago2015-03-30 06:56:56 UTC Comment #67471
Ive ran a q6600 with gtx560ti couple of hard drives some extra doo dads with a 550w just fine.
Commented 5 years ago2015-03-30 13:37:09 UTC Comment #67476
Alright, thanks guys. :)

And, what if I would like to add 1 or even 2 more HDDs and a wireless PCI card with 3 antennas? Does this exceeds or am I still covered with 500w?
Commented 5 years ago2015-03-30 16:18:08 UTC Comment #67469
I would calculate the maximum wattage used on the most complicated system you would want to have.
Buy a power supply to match that if you're actually planning on going that far.
Commented 5 years ago2015-03-31 10:19:00 UTC Comment #67477
Nah Tet, just that, no more additional stuff. :P
At least 2 HDDs and a PCI Card with OCed CPU, that's all. :)
Commented 5 years ago2015-03-31 11:02:29 UTC Comment #67470
Don't forget your fans.
Commented 5 years ago2015-03-31 12:02:31 UTC Comment #67474
#1 fan.
Commented 5 years ago2015-03-31 19:05:27 UTC Comment #67478
There's one actually... One big one.

Here's the full set without HDD and PSU (fan on the left):

http://i.imgur.com/ilZbYP2.jpg

Does a stock CPU fan consumes a lot more than a custom Zalman one of that kind (other than the other sole fan)?

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