Do I have to buy a micro ATX PSU if my motherboard is also mATX?

vhn1 · Jan 14, 2014

Here is a link to my rig:
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01625662&cc=us&dlc=en&lc=en&product=3876397#N477

The board is microATX: 24.4 cm (9.6 inches) x 24.4 cm (9.6 inches).

Also, according to this link, the case is labeled Mid-sized ATX, though it seems quite small inside:
Height: 39.6 cm (15.6 inches)
Width: 18 cm (7.09 inches)
Length: 42.8 cm (16.85 inches)

bmanv13 · Jan 14, 2014

It all depend on if it will fit inside your case. ATX, mid-ATX, etc., are just sizes. If your case is ATX or midATX, it will fit all of your microATX parts inside.

Dark Lord of Tech · Jan 14, 2014

Made by Seasonic and OEM sized.If your PSU is this size below it would make a nice replacement.

5.5" x 5.9" x 3.4"

PCPartPicker part list / Price breakdown by merchant / Benchmarks

Power Supply: XFX 550W 80+ Bronze Certified ATX Power Supply ($49.99 @ NCIX US)
Total: $49.99
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-01-14 22:42 EST-0500)

MagicPants · Jan 14, 2014

I run a Micro-ATX mobo off of an ATX PSU so I'd tentatively say the answer to your question is no. (You still need room for it in the case.)

FALC0N · Jan 14, 2014

No you don't. Micro ATX boards are compatible with the larger ATX cases. If you use a micro board in a larger case with room for a full size PSU, use it. Power delivery specs are the same. Now if your case is also smaller, that could be a problem. The PSU obviously needs to fit in the case.

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Do I have to buy a micro ATX PSU if my motherboard is also mATX?

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