Is my PSU powerful enough?

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cesium666

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I currently have the corsair hx520 in my sig. I plan to do an i7 build in a few weeks, and I'm not sure if my PSU can handle it.

The planned build:
core i7 920 (hopefully OC'd to 3.8ghz or so)
gigabyte GA-EX58-UD3R
either a 4890 or 4870 1gb
6gb ram
3 hdds

if its not enough, would hte hx620 or silverstone ST70Fsuffice?
 
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520HX would be cutting it close. A bit too close with the 4890. I would suggest getting another unit.

HX620 is good as is the Silverstone. Is modular a requirement for you? If not, you can save money by going with the Corsair TX650 or TX750.
 
yeah, i refuse to go back to a non-modular psu heh

this one cooler master psu seems interesting, the Silent Pro 700W. it has a single 12v rail which is always nice, and its rated quite well


EDIT: actually, i was just taking a look, and for example, anandtechs system with an i7@3.2ghz and 4890 only draws 287w at load. factor in the overclock, and it shouldn't be more than 350w or so. is there really a need for a new psu?
 
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I think it would depend on amperage needed at the 12V rails. What does the 4890 consume for amperage?:confused:
 
brasherman said:
I think it would depend on amperage needed at the 12V rails. What does the 4890 consume for amperage?:confused:
Click to expand...

Using the GTX 260 as a close approximation (they use about the same amount of power), according to eVGA, about 36A on the +12V rail is needed for a system + the GTX 260.

@ cesium666
Hit up the Corsair PSU Finder. They recommended a Corsair 450VX PSU for your setup, even with the OC'd CPU. So you're fine with the 520HX :)
 
Great! The less money I have to spend, the better :p

That calculator is great. Even with the extremely overclock CPU option and overclock 4890, it recommends the hx520, so yeah, there should be no issue then :D
 
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