Minimum power supply needed for rebuild

Microsoft / Asrock k10n78
May 12, 2013 at 16:30:17
Specs: Windows XP Home Edition, Athlon II X4 640
I've pretty much decided on the hardware for my Windows 7 rebuild, but I'm trying to decide if I can get away with reusing my old Hiper 530W Type M PSU which seems to be in mint condition. For reference, my existing build runs absolutely fine and is:

Windows XP
Asrock K10N78 motherboard
AMD Athlon II X4 640 (95W)
4GB PC2-6400
512MB GeForce 9800GT
500GB Western Digital Green SATA HDD
LG DVD writer

The hardware I'll be rebuilding with is:

Gigabyte GA-970A-UD3
AMD FX-6300 (95W)
16GB 1600MHz DDR3
Radeon HD 7750 or HD 7770
250GB Samsung 840 SSD
1TB Western Digital Green SATA HDD
The DVD writer from my old machine!

Given that my current setup behaves perfectly, is there any reason to change the PSU as I think 530W should be enough to cope with the addition of the SSD. From what I remember/worked out, it can continuously support about 30A on the 12V rails. For anyone who wants to try and interpret it, the spec is at the link below:

Any suggestions would be appreciated!



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May 12, 2013 at 20:17:49
CPU and video card are the two components that demands high power from +12v rail.
AMD FX-6300 (95W TDP) = 8A
HD 7770 (80W TDP) = 7A
Total = 15A from +12 rail
It's a good unit (not good as Corsair or Antec) and it will handle the new components just fine.
Green hard drives are good for storage, get black or blue version if u want performance hard drive.

You know the real meaning of peace only if you have been through the war.

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May 12, 2013 at 20:35:19
Replace it. It is of an older or cheaper design with higher ratings on the lower voltages (unusable), two relatively low power 12Volt rails, non-PFC in US version and not greater than 80% efficient.
Look to something like these:
Single 12Volt rails with 44-50 Amps, 80-85% efficient certified, active PFC, quality name brands, and reasonably long warranties (3-5years).

You have to be a little bit crazy to keep you from going insane.

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May 12, 2013 at 20:40:22
The only knock I could find against your PSU is the low efficiency rating of 76%, other than that, it appears to be OK. It has dual +12v rails combined for 360W max, so 30A is correct. It should be adequate for your new build.

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Related Solutions

May 13, 2013 at 00:13:28
Thanks for the suggestions people. I'm aware that this PSU isn't the most efficient, but as long as it works, I'll use it for now. I'm definitely considering replacing it for something more modern and efficient though

Does anyone have any replacement suggestions for someone who lives in the UK?

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May 13, 2013 at 19:29:15
My calcs say a 300W, but I'd go 350W high-efficiency, like this --


FYI: Thermaltake Power Supply Calculator

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May 14, 2013 at 06:39:37
Yeah, I ran my setup through several calcuators, including Thermaltake's own. The current PSU will work providing it's aged well, but I plan on upgrading it as soon as possible in order to get the most efficient setup and ensure reliability.

I've actually got 2 machines like this and I'm in the process of rebuilding both - one for me, one for the parents. One's going to be a straightforward single GPU mid-spec for my family, but my own will be a Crossfire compliant setup so that I have that option if I want it. I'm using AMD processors (Piledriver FX-6300), as although I'd love it, I can't afford an i5 or i7 on my budget!

On that note, what PSU would be a good idea if I wanted to run say 2x HD 7770? I'm not into multi-monitor high-res gaming, I just want to be able to run games like Crysis 2 at 1280x1024 on reasonably decent settings!

I'm currently looking at Corsair, Thermaltake and OCZ as I know they've got a good reputation. Just for reference, I'm based in the UK.



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