Question about modular PSU and new videocard

dufidimmus

Reputable
Oct 26, 2014
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Hello!
The card, which I'll buy is msi gtx760 2G/OC gaming.
CPU: i5-4690
MB: Asus H97 Plus
HDD: 2x 7500 rpm. SATA drives
RAM: 2x4 Geil dragon bl
 
The power is not new and has specifications: 700W (Peak) - 600W (Rated)
+ 3.3V - 28A
+ 5V - 28A
+ 12V1 - 20A
+ 12V2 - 20A
-12V - 0.8A
+ 5Vsb - 2.0A
 
(+ 12V1) + (+ 12V2) ≤ 480W
Power supply is modular and has 2 slots for 6pin pci-e cables.
As far as I know the video card requires 30-31A provided by 1x 6pin and 1x 8 (6 + 2) pin.So I have 2x +12V rails each at 20A, will 1 rail be enough if I plug both power cables from the videocard in it, or for safety - one 6pin must be on one 20A rail(+2x sata HDD's 7500rpm) and the other 8(6+2)pin on the second 20V rail(+ sata dvdrw)? I can move the DVDRW sata cable on the rail with 2x sata HDD and 6pin connector (for the VGA).
 
Solution
Hello,

No way an GTX760 use 30Amps; its official rating is 170W, maybe 200W if overclocked, so max. +12V/17 Amps; your PSU should be fine.

On the other hand, what make/model is your PSU? A good PSU retains its power capabilities over time (you can expect at least a 5-year stint for such PSUs), a bad PSU suffer severe power derating (bad caps, overheating, old architecture) in a relatively short period of time (1-2 years).

Cristi72

Admirable
Hello,

No way an GTX760 use 30Amps; its official rating is 170W, maybe 200W if overclocked, so max. +12V/17 Amps; your PSU should be fine.

On the other hand, what make/model is your PSU? A good PSU retains its power capabilities over time (you can expect at least a 5-year stint for such PSUs), a bad PSU suffer severe power derating (bad caps, overheating, old architecture) in a relatively short period of time (1-2 years).
 
Solution

Vic 40

Titan
Ambassador


I agree.

One of the rails is probably for the motherboard.cpu anyway and the other for the gpu,with 20amps=240watt (if necesssary and availble) for the gpu would you be fine,75watts come from the pcie slot anyway which is powered from the other rail=>motherboard.