Sign in with
Sign up | Sign in
Your question
Closed

I think I'm cutting it close - will this PSU be enough?

Last response: in Components
Share
December 9, 2011 1:27:02 AM

So I got this 430W Corsair CX430 V2 PSU on Black Friday because it was a good deal... since I've purchased the rest of the components for my build I'm kinda worried it may not be enough power. +3.3V@20A, +5V@20A, +12V@28A http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Here's my system:

Phenon II x6 1055t 125W
Biostar TA880GU3+
ASUS EAH6770/DI/1GD5 Radeon HD 6770
Kingston 64GB SSDNOW V100 SATA II
2x4GB G.SKILL X DDR3
Blu-ray burner
Old Seagate Blue SATA I HDD

The eXtreme PSU calc comes up with 270W MIN. On the other hand, I've found numbers that suggest the GPU draws 110W and the CPU draws 220W, which is close to my 12V x 28A = 336W power supply's spec w/o adding in the draw of my other components.

I'm having trouble finding out a definitive answer... idk why each component doesn't spec a power draw on the package...

Am I cutting it too close or will I be OK?

More about : cutting close psu

a c 700 ) Power supply
December 9, 2011 1:34:15 AM

It will handle your system fine with HD6770! I have one running on a 400watt Antec!
Score
0
a c 80 ) Power supply
December 9, 2011 1:43:23 AM

Seeing as how the power supply is an important component I tend to overkill on the size of the psu that I put in my computer because I believe that if it's there then it can be use by the system if it's not needed it's still available. That way I don't have to worry about being close and wondering if it's going to do it.
You have already bought the psu so put it in and see how it goes it certianly looks like you will be ok , but keep in mind that you most likely don't have the room to do any overclocking or adding another video card and doing crossfire.
Score
0
Related resources

Best solution

a b ) Power supply
December 9, 2011 1:51:57 AM

Measured power consumption one card:
System in IDLE = 165W
System Wattage with GPU in FULL Stress = 242W
Difference (GPU load) = 77W
Add average IDLE wattage ~ 19W
Subjective obtained GPU power consumption = ~ 96 Watts

You're good to go. The system setup consists of first generation core i7 965 / X58 system OC'ed to 3.75.

Source: http://www.guru3d.com/article/his-radeon-6770-iceqx-tur...
Share
December 9, 2011 11:43:46 AM

Thanks guys. I think I needed a second opinion because I'd kick myself if I fired her up and burnt out any of my components.

PSU specs are so vague... the manufacturer advertises the PSU at one wattage, then when you multiply Volts x Amps its a different story. On top of that the component manufs don't spec power draw reqs. Makes it hard to know what's really required.
Score
0
December 9, 2011 11:55:02 AM

u'll be fine
Score
0
a c 85 ) Power supply
December 9, 2011 1:23:40 PM

220W? How does a 125W CPU (at stock) draw 220W?

I agree that you'll be fine. I agree that a system like that will use around 250W-275W. You have 336W on your 12V rail so your fine.
Score
0
December 9, 2011 4:53:47 PM

4745454b said:
220W? How does a 125W CPU (at stock) draw 220W?

I agree that you'll be fine. I agree that a system like that will use around 250W-275W. You have 336W on your 12V rail so your fine.


Sorry, I should've specified - 125W is the TDP, not the power draw.
Score
0
a c 1174 ) Power supply
December 9, 2011 6:59:04 PM

For a system using a single Radeon HD 6770 graphics card a power supply that has a combined +12 Volt continuous current rating of 24 Amps or greater and that has at least one 6-pin PCI Express supplementary power connector is recommended.

The power supply unit's wattage is not the spec that matters.

Your Corsair Builder Series CX430 V2 (CMPSU-430CXV2), with its +12 Volt continuous current rating of 28 Amps and one 6-pin PCI Express supplementary power connector, is sufficient for your build.
Score
0
a c 1174 ) Power supply
December 9, 2011 7:15:01 PM

Newegg's PSU calculator is one of the crappiest ones out there.
Score
0
December 12, 2011 7:01:59 PM

Best answer selected by bchaney.
Score
0
!