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Minimum PSU needed?

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August 4, 2010 8:32:41 PM

AMD Phenom X4 9650 2.3GHz Socket AM2+
Corsair 450W VX Series PSU
OCZ 4GB (2x2GB)
Sapphire HD 4670 512MB
LiteOn 20X DVD±RW
Maxtor 320GB Hard Drive
Running Windows 7 64bit.

ATM I have the 450w corsair without the 4670 in since it locks up whenever it wants.

So what's the minimum PSU i need to run my computer without it locking up?

More about : minimum psu needed

a c 139 ) Power supply
August 4, 2010 8:39:25 PM

The minimum PSU for a 4670 is something like 300-350W.
The Sapphire website recommends a 400W PSU - which is an 'average' 400W PSU while the Corsair 450VX is quite a bit better than average.
You should look at something other than a PSU issue I think.

Why didnt you list your motherboard?
August 4, 2010 8:40:40 PM

Locking up doesn't sound like a power supply problem, I'm not sure what it is.

I've got.
Phenom 9850 overclocked to 3.0Ghz
Gskill 4Gb (2x2Gb)
Sapphire 4670 512mb
DVD burner(not sure brand)
Seagate 250Gb Hard drive
Seagate 80Gb hard drive
Western Digital 80Gb hard drive
Hitatchi 80Gb hard drive
3 case fans


This all runs fine with a 380W Antec Earthwatts power supply. I've also got 2 similar systems with overclocked quads and radeon 4670's, one of them is also on a 380W Antec Earthwatts and the other a generic 400W Antec. The systems have run fine since 08 with these.
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August 4, 2010 8:43:05 PM

Sorry, missed the motherboard.
Its a SSapphire PE-AM2RS740G Pure 740G Socket AM2+ onboard VGA DVI 6 channel audio mATX Motherboard
a b ) Power supply
August 4, 2010 8:46:02 PM

I would choose one of these. I'm running an E8600, 4 GB DRR2 RAM, two 3870s in crossfire, plus 5 HDDs, 1 DVDRW, a TV tuner, and security video on the CMPSU-650TX with no probs for 18 months.
August 4, 2010 9:01:05 PM

So nobody know's the minimum I need, just going to go by their experiences with a different system?

Seriously, Is it my PSU being to low power for my computer? Even without the graphics card in, my computer does lock up and freeze randomly sometimes just not as much as it did when the graphics card was in.
a c 139 ) Power supply
August 4, 2010 9:06:22 PM

Without your video card your PSU might be using 120-150watts.
It's not your PSU.

a c 139 ) Power supply
August 4, 2010 9:08:32 PM

Detach all but one of your case fans, all the HDDs not used a boot drive and your DVD drive (power and data cables). Run some tests to see if still locks up.

If you still have problems try testing with 1 stick of RAM.
a c 139 ) Power supply
August 4, 2010 9:09:33 PM

Still having problems? Try running your CPU at stock.

August 4, 2010 9:15:45 PM

"CPU at stock"?
It's not overclocked.
a c 139 ) Power supply
August 4, 2010 9:16:45 PM

Sorry about that.... I was looking @ loneninja's list when I wrote that.. not yours.
August 4, 2010 9:19:47 PM

So what about mine? think it could be PSU?
a c 139 ) Power supply
August 4, 2010 9:24:46 PM

I think if it was the PSU you'd get shutdowns instead of lockups.
August 4, 2010 9:31:00 PM

It used to restart if I left it when my computer locked up. But since I'm getting used to it I just hit the restart button before it can.
Tbh, I'm just thinking of saving up and building a new computer from scratch since this one has only given me problems since I build it like a year ago.
August 4, 2010 9:31:25 PM

I just put your specs into newegg's PSU calculator. It reads 380W for your system, . This isn't "gospel truth", it's just a general idea. You need electrical test equipment to know anything better. Still, I agree, your PSU SHOULD work.

Keep following WR2's test suggestions. The best you can do is start eliminating components to determine the cause of the lockup.
!