psu to supply only r9 290

[mghgs91]

what minimum power smps  would be required to power only one r9 290.other hardware will be running on seperate power supply.would a corsair vs 450 be perfect. it have 34 amp on its 12 volt rail.or a corsair vs 550 which have 42 amp on its 12 volt rail.

[JohnnyCorporalTech]

450 watts is way more than enough to power just the GPU. 

[genexis_x]

Yes 450W is enough but don't go for Corsair VS PSU. It's a bad PSU.

[mghgs91]

43 minutes ago, ZM Fong said:

Yes 450W is enough but don't go for Corsair VS PSU. It's a bad PSU.

what's your recommendation.because i am using corsair gs800 for four years.its now powering my both r9 290.(no problem, no fan ramp) but i want be on safe side.so buying another psu.

[mghgs91]

3 hours ago, JohnnyCorporalTech said:

450 watts is way more than enough to power just the GPU. 

does 12v rail current output(amperage) matters.

[HKZeroFive]

2 hours ago, mghgs91 said:

what's your recommendation.because i am using corsair gs800 for four years.its now powering my both r9 290.(no problem, no fan ramp) but i want be on safe side.so buying another psu.

The Corsair VS series is mediocre at best, and it's not that good of a power supply. The Corsair GS series, on the other hand, is actually quite good. If it's not giving you any problems, there's no need to upgrade it. The Corsair VS would be a significant downgrade.

[genexis_x]

2 hours ago, mghgs91 said:

what's your recommendation.because i am using corsair gs800 for four years.its now powering my both r9 290.(no problem, no fan ramp) but i want be on safe side.so buying another psu.

GS series is not bad. PSU change not needed.

[mghgs91]

On 28/04/2017 at 11:25 AM, ZM Fong said:

GS series is not bad. PSU change not needed.

but there is no space for overclocking.

 

[mghgs91]

On 28/04/2017 at 11:04 AM, HKZeroFive said:

The Corsair VS series is mediocre at best, and it's not that good of a power supply. The Corsair GS series, on the other hand, is actually quite good. If it's not giving you any problems, there's no need to upgrade it. The Corsair VS would be a significant downgrade.

i know but to power only single gpu.is vs series so bad? on current gs800 i have to run everything on stock.but i want to overclock everything.

[HKZeroFive]

1 hour ago, mghgs91 said:

i know but to power only single gpu.is vs series so bad? on current gs800 i have to run everything on stock.but i want to overclock everything.

It's intended for basic/low power systems. It's not good for power hungry cards like the R9 290.

 

Why do you have to run everything in stock? 800W is way more than enough for a overclocked R9 290. It can easily power two.

[mghgs91]

20 hours ago, HKZeroFive said:

It's intended for basic/low power systems. It's not good for power hungry cards like the R9 290.

 

Why do you have to run everything in stock? 800W is way more than enough for a overclocked R9 290. It can easily power two.

two r9 290 consumes 600w of power i.e. only 200w left for everything else.also running power supply on full load is not good for power supply.so i am considering vs450 to power only r9 290 alone. vs 450 provides single 12v rail with 34 amp current while a r9 290 needs maximum of 31 amp current.also will vs550 be any good? it can provide 42 amp of current on single 12v rail.

[HKZeroFive]

52 minutes ago, mghgs91 said:

two r9 290 consumes 600w of power i.e. only 200w left for everything else.also running power supply on full load is not good for power supply.so i am considering vs450 to power only r9 290 alone. vs 450 provides single 12v rail with 34 amp current while a r9 290 needs maximum of 31 amp current.also will vs550 be any good? it can provide 42 amp of current on single 12v rail.

Two R9 290s in Crossfire actually consume about 500W. Even so, 200W for the other components is more than enough... with 800W, you still have alot of headroom so you wouldn't be running a power supply at "full load".

 

And I think you're missing the point. The VS450 isn't a good quality power supply. Many people make the mistake of only looking at the rated wattage output of a PSU and completely ignore the quality of the unit.

 

So the bottom line is this... while 450W is enough for a single R9 290, the quality of the VS450 is simply not good enough. Get a better power supply.

[quan289]

On 4/27/2017 at 8:52 PM, mghgs91 said:

what minimum power smps  would be required to power only one r9 290.other hardware will be running on seperate power supply.would a corsair vs 450 be perfect. it have 34 amp on its 12 volt rail.or a corsair vs 550 which have 42 amp on its 12 volt rail.

No. Whether you get the 450w version or the 650w version, the Corsair VS series is a bad choice for such an application. In a dual GPU application, you want to ensure you have an independent regulated or DC-DC regulated PSU, as the supplementary power supply will be put in a severe crossload scenario where there is little to no loads on the minor rails and all on 12V. In a group-regulated design such as the VS series, the voltages will behave erratically and even goes out-of-specs.

[Going_AFK]

I see you are going the Austin Evans route

(Scrapyard Wars Reference)