New build power requirements

[TheDankKoosh]

I was wondering how well a CX550M would work on a system that includes a xeon x3440 overclocked to 3.6 ghz on stock voltage and a 290x at stock. I will be trying to undervolt the 290x as far as it'll go, but some insight would be nice.

[brob]

I suspect 550W is not going to be enough, even undervolting the r9 290X. At stock with 1 drive the system would likely have a maximum estimate above 550W.

[TheDankKoosh]

6 minutes ago, brob said:

I suspect 550W is not going to be enough, even undervolting the r9 290X. At stock with 1 drive the system would likely have a maximum estimate above 550W.

I figure that I might be pushing the power budget, so that's why I'll be undervolting. I figure at stock settings with a healthy undervolt, the 290x won't use more than 250w then I figure that my cpu is using about 110w with rest of system consumption being 50-70w. So, I believe at worst on a stress test I'll be seeing numbers around the 400w mark, possibly 450w if my numbers are off. I tend to not trust psu calculators due to them inherently being used to sell higher end products. With these numbers, do you think the CX550M will be able to handle the sustained load? 

[Streetguru]

32 minutes ago, TheDankKoosh said:

I was wondering how well a CX550M would work on a system that includes a xeon x3440 overclocked to 3.6 ghz on stock voltage and a 290x at stock. I will be trying to undervolt the 290x as far as it'll go, but some insight would be nice.

You should be fine in gaming loads, just don't do any heavy rendering or stress tests. Not so much about power requirement, more about PSU quality

[TheDankKoosh]

5 minutes ago, Streetguru said:

You should be fine in gaming loads, just don't do any heavy rendering or stress tests. Not so much about power requirement, more about PSU quality

The CXM line seems to be pretty good according to the updated psu tier list and jonnyguru reviews, so I figure it can handle anything that it's rated for well enough. Do you think I'll be hitting power limits if I stress test?

[Streetguru]

Just now, TheDankKoosh said:

The CXM line seems to be pretty good according to the updated psu tier list and jonnyguru reviews, so I figure it can handle anything that it's rated for well enough. Do you think I'll be hitting power limits if I stress test?

Buy a Kill-A-Watt if you want to watch what your power draw from the wall is

[brob]

3 hours ago, TheDankKoosh said:

I figure that I might be pushing the power budget, so that's why I'll be undervolting. I figure at stock settings with a healthy undervolt, the 290x won't use more than 250w then I figure that my cpu is using about 110w with rest of system consumption being 50-70w. So, I believe at worst on a stress test I'll be seeing numbers around the 400w mark, possibly 450w if my numbers are off. I tend to not trust psu calculators due to them inherently being used to sell higher end products. With these numbers, do you think the CX550M will be able to handle the sustained load? 

The estimate I mentioned is simply the addition of max power draw estimates from the various manufacturers. You should be ok.

[rgbManiac]

The power supply should be able to handle those two without undervolting the gpu.