Solved PSU upgrade from ATX2.0 12V 400W

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April 21, 2012 at 02:45:35
Specs: Windows 7, Pentium Dual Core / 2 gigs
I currently own the FSP400 60THA(1) PSU which came with the stock Aspire M5641, specs below.

I've been wanting to upgrade to a 500W for a while now and today, I finally decided to take the jump. I'm thinking FSP BLUE STORM II 500-WATT PSU, now my current PSU is an ATX2.0 12V while the Storm II is an ATX2.2.

Somebody please tell me if the Storm II is compatible with my motherboard and if not, what other options I have to check out.

See More: PSU upgrade from ATX2.0 12V 400W

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April 21, 2012 at 03:27:07
ATX 2.2 should be fine - dimensions & screw mounting points are same - main difference is that on 2.2 version the main power plug to the motherboard is 24-pin instead of 20-pin (to accomodate PCI-express). However, it's a two-piece plug so it easily converts to 20-pin if your motherboard socket is 20-pin.

I fitted an ATX 2.2 PSU to my son's 7-year old PC last month and had no problems at all - just make sure it's got the right type of output connectors (and enough of them) to match the power connectors on your internal drives.

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April 21, 2012 at 06:10:02
You didn't say why you need to upgrade the psu, but if you do, you should really go with a psu that has only a single 12 volt rail like the Corsair line. The one you picked has two 12 volt rails. I would suggest you look at something like this one.

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April 21, 2012 at 06:46:55
✔ Best Answer
The Aspire M5641 certainly isn't a high end system. Unless you plan on installing a high end / power hungry gaming card, I see no reason to upgrade the PSU. FSP makes decent units & the specs to the 400W look reasonable. Going from v2.0 to v2.2 is pretty much a non-issue. If you feel the upgrade is necessary, take grasshopper's advice & go for a unit with a single high amperage +12v rail.

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April 21, 2012 at 06:57:19
The stock Aspire came with one HDD and on-board graphics, but now, I've got 4 HDDs and a GeForce 8400 GS running on the same 400W PSU, it's too much. What's more, I've been having trouble with the PSU lately, high pitched noises and the display goes crazy (output alternates between on-board graphics and the card) when the GS is fixed up.

I've checked the board and it's got a 24-pin socket, can I still go for the FSP BLUE STORM II 500W?

Thanks for the replies, appreciated.

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April 21, 2012 at 09:41:44
You can, but you're not listening. It has two 12 volt rails. Get a psu with a single rail.

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April 21, 2012 at 10:55:49
The 8400GS is a low end card with low power requirements, maybe 40W max under full load, say 3A from the +12v. Each HDD pulls about 1-2A from the +12v.

Is there some reason you prefer the Storm II with its dual +12v design over a unit with a single +12v rail? Did you check the specs for the Corsair posted by grasshopper? 600W, ATX12V v2.3, 80 Plus certified, active PFC, single +12v @ 40A, 5 yr warranty, only $50 after rebate.

Rosewill has some decent units as well, but the warranty isn't as good.

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April 21, 2012 at 11:16:32
I did check it out, and I do understand a single rail is preferred over a double rail but the situation is a little complicated and it's a lot easier for me to get my hands on a Storm II than anything else. In any case, thanks for the advice, I will try to get my hands on a single rail PSU.

@grasshopper why is it a bad idea to go for a double rail here?, just curious.

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April 21, 2012 at 14:55:33
Single versus multiple rails. You don't have to juggle the loads so that you don't exceed the current draw on one.

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April 21, 2012 at 15:10:53
What's complicated? Are you not from the US or are you unable to order online? And if you understand that a single +12v rail is preferred, why ask why it's a bad idea go to for a dual? Preferred does not mean required, if for some reason you prefer a dual rail PSU, go for it.

Single vs. Multiple +12V rails: The splitting of the +12V rail

So what's all this rubbish about multiple 12 volt rails?

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April 21, 2012 at 20:58:08
I knew the deal about load balancing that came with duel rails, I asked because I thought there was some other reason why a single rail was preferred in my case.

Complicated because I'm not in the US and ordering online is not an option either.

Thanks for the advice, appreciated.

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