TheoRichel,
you said above: "Thank you. Nevertheless, the box in which the graphics card came clearly says beneath the Recommended System Requirements: 'A minimum 500Wsystem power supply (with 12 V current rating of 40A)'.
That is what it says and other people on the net have wondered about it as well."
What the sales box was saying was that the video card must be installed in a computer with a minimum power supply for the system of 500 watts. This makes total sense as that is least I would put in a gamng or graphics workstation. Now, based on the ATI Radeon™ HD 5770 GPU Feature Summary
The second part of a 12 volt currect rating of 40 amps is totally wrong. Per the ATI Radeon™ HD 5770 GPU Feature Summary located on the AMD website, the card has a Maximum board power: 108 Watts
and a Idle board power: 18 Watts. The 108 watts devided by 12.0 VDC gives 9 amps total. The 108 watts devided by 5.0 VDC gives 21.6 amps total. So this proves that the printing on the box was in error. I used the ATI Radeon™ HD 5770 GPU for the current as I could not locate the card number that you listed; "Asus EAH5770/2DI/512MD5" anywhere on the ASUS homepage. I did use the area selection of the USA for my search, if that is incorrect please advise.
In reference to the Asus P7P55D, S1156, P55, 4xDDR3, 2xPCIe, ATX motherboard, which will carry a
i5 750 2.66GHz, 8MB, S1156 processor. According to the analysis on this page:
http://techreport.com/articles.x/17598/5, the Asus P7P55 Deluxe in the Xtreme phase consumed only 235 watts. The confiruration on the mobo undertest is here:
http://techreport.com/articles.x/17598/4,
It is very heavy load for the machines with a matching power supply.
Now if we take the 235 watts from the mobo add this to the 108 watts found on the ATI site and you have a processing load of 343 watts. Add on 150% for HD's, optical hardware and auxillary cards and you get 514 watts. Now add on 120% surges and unexpected loadings and you get 617.4 watts. This is very close to your Cooler master and I would not hesitate to use it.
On a website I have calculated the power needs of this combination and the conclusion was that a PSU of 350 watt would be enough. As I said above that is least I would put in a gamng or graphics workstation would be a 500 watt PSU.
Now I read on the package that the mobo requires 600 w and the graphics card 500 w.
I have now bought a Cooler master (which I can still return though) of 600 w (m620). One would think that would suffice largely, but the graphic card also requires 'a 12 v current rating of 40A'.
The salesmen didnt believe his ears.
My advice is similar to dmbgo, I would install everything and power it up. The only power supplies that I know of that produce 40 amps at 12 volts are not computer oriented.
I hope that this helps. Please post further concerns.
curtisla
