Stupid build - PSU requirements

Wakinglimb · 17 Sep 2009 at 15:45

Okay, so I get that this is a stupid build. It's not the best time to make this build and there are far better options, but I have always wanted a MATX SLI/Xfire rig, so I making one.

Basis is a DFI LANPARTY JR 790GX-M2RS, with one of the new Athlon II X4 quads, 4gb DDR2, 2x HD4890s, an OCZ Vertex SSD + 1tb Samsung F1 HDD - all in a Silverstone Sugo (undecided which one).

They take full size ATX PSUs, so just wondering which (modular) PSU to choose? I'm really thinking about a 650w decent brand one will be fine - any ideas?

Lemin · 17 Sep 2009 at 17:49

Quote,,,,

If you're looking at x2 HD4890s, then Corsair TX750W minimum is the recommended PSU ( certified to power two of those cards according to ATI ), but I'd go for the TX850W as a minimum just to be on the safe side.

GG ( Moderator @ SapphireTech's VGA / Mainboard Help Forums ).
http://forums.amd.com/game/messageview.cfm?catid=262&threadid=116721

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Wakinglimb · 18 Sep 2009 at 00:16

See, I think people go over the top on PSU power ratings these days. My current rig is a Q8200, 4gb DDR2, 1tb HDD and a HD4890 running on a 300w Silvertson MITX PSU - I'm not doubling everything so I think 750 is too much...

BIGBC · 18 Sep 2009 at 00:18

I would expect a decent 600W to manage it, but would want 700W to make sure - also leaves room for extras later on.

JonJ678 · 18 Sep 2009 at 00:30

Extras? Like more than two graphics cards in the matx computer?

That little Silverstone is working hard. I agree that 650W will be fine, but have to leave you there as I don't like modular supplies, and neither does my recommended pc p&c. If Seasonic make one that is suitable I'd go with that. Higher wattage has the benefit that it can be working more efficiently as the peak efficiency seems to be around 80% of maximum capacity. So it'll cost you less to run, if you judge it right.

Main reason to post is to mention the P55 asus maximus III gene

Which is exactly the board I would want to make a matx gaming computer from. Intel are worth a look here

Wakinglimb · 18 Sep 2009 at 08:56

I've been looking at that board, but there is a certain charm to the AMD rig I think. I know it's not DDR3 and isn't new tech, but I think the Athlon II x4's are great little chips and this rig would give me a nice bang per buck. Also tryingt help out the underdog a little. Not bought an AMD CPU for a few years now and feel bad for them!