Corsair HX620 handle GTX 280 SLI and Core i7 920?

[Dkcode]

I have a single GTX 280 and i don't know weather to upgrade to a single 295 or just buy another 280 for SLI.

Either solution works out economically for me as i can sell my 280 and put it towards a 295, or i can keep the 280 and buy a second card. The latter will be faster obviously.

The concern i have is power, i know this PSU is very well made but i still have doubts. Does anyone have a 280 system running with a quad core or better: a Core i7 running with this setup?

 

[ghost recon88]

Yea there's no way that PSU would work for a dual GTX280 + i7 setup. For that you want at least the HX1000. Even a GTX295 + i7 would probably struggle on the 620.

 

[uclaLabrat]

Originally posted by: ghost recon88
Yea there's no way that PSU would work for a dual GTX280 + i7 setup. For that you want at least the HX1000. Even a GTX295 + i7 would probably struggle on the 620.

Um, I'm running an OC'd 4870X2 and an i7 on my PC P&C 750w, and it's plenty. The 620 would be pushing it for SLI, but I think the GTX280 SLI has slightly less power draw, if I remember.

 

[yacoub]

And here you see the difference between people who actually know from experience & research, and people who just run on rumors and perpetuate them (i.e. "omg you need at least a HX1000".)
Use a system power calculator and you'll see that in reality, total system power isn't quite as extreme as rumormills make it out to be.
Here's a good one, although it is now sponsored by a PSU maker. Hopefully it's still as accurate : http://www.antec.outervision.com/

 

[z1ggy]

I calculated no more than 600 watts woudl be needed for an i7 920 Oc'ed to 3.4 Ghz with 2 HD 4890's (similiar power to your 275) 4 fans, 1 hd, 1 dvd drive, and one other PCI card. So as long as you dont hook up like 10 USB devices while your running prime95 I think your 620 shoudl be fine, but If you wanted to be safe.. you get a 750 w.

 

[error8]

Although the 620 W PSU might do the trick, I personally would take a Corsair 750 W for that SLI, i7 setup. I just don't like running PSUs that hard.

 

[OCGuy]

Originally posted by: ghost recon88
Yea there's no way that PSU would work for a dual GTX280 + i7 setup. For that you want at least the HX1000. Even a GTX295 + i7 would probably struggle on the 620.

Well the first part is correct. The 2nd part is not.


1000W PSUs are needed for a very select few setups. 280 SLI is not one of them.


I wouldnt (and didnt) go under a solid 750 personally.

 

[Dkcode]

Cheers guys.

I had a 4870X2 running on this thing with no problems. A review reported around 510W total draw power from GTX 280 SLI.

I might go for a 295 and make to make things a little easier.

 

[1ManArmY]

Originally posted by: ghost recon88
Yea there's no way that PSU would work for a dual GTX280 + i7 setup. For that you want at least the HX1000. Even a GTX295 + i7 would probably struggle on the 620.

My friend was able to run 280 SLI with your PSU, but he sold it and upgraded to the HX1000 once he saw mine😀

Corsair PSU ratings are conservative you probably have a 750W power supply there. I know the HX1000 are 1200W just not certified

 

[uclaLabrat]

Originally posted by: 1ManArmY

Originally posted by: ghost recon88
Yea there's no way that PSU would work for a dual GTX280 + i7 setup. For that you want at least the HX1000. Even a GTX295 + i7 would probably struggle on the 620.

My friend was able to run 280 SLI with your PSU, but he sold it and upgraded to the HX1000 once he saw mine😀

Corsair PSU ratings are conservative you probably have a 750W power supply there. I know the HX1000 are 1200W just not certified

Also depends if they're certified peak or continuous. The better brands (Corsair, PC P&C) rate at continuous power at 50 deg C I believe.

 

[Dkcode]

Originally posted by: 1ManArmY

Originally posted by: ghost recon88
Yea there's no way that PSU would work for a dual GTX280 + i7 setup. For that you want at least the HX1000. Even a GTX295 + i7 would probably struggle on the 620.

My friend was able to run 280 SLI with your PSU, but he sold it and upgraded to the HX1000 once he saw mine😀

Corsair PSU ratings are conservative you probably have a 750W power supply there. I know the HX1000 are 1200W just not certified

What made him upgrade?

I really don't know weather or not to go for GTX 280's or a single 295. What does everyone reckon?

The Corsairs seem to be the VTEC of PSU's. I could always upgrade if it starts to have fits.

 

[OCGuy]

Originally posted by: Dkcode

Originally posted by: 1ManArmY

Originally posted by: ghost recon88
Yea there's no way that PSU would work for a dual GTX280 + i7 setup. For that you want at least the HX1000. Even a GTX295 + i7 would probably struggle on the 620.

My friend was able to run 280 SLI with your PSU, but he sold it and upgraded to the HX1000 once he saw mine😀

Corsair PSU ratings are conservative you probably have a 750W power supply there. I know the HX1000 are 1200W just not certified

What made him upgrade?

I really don't know weather or not to go for GTX 280's or a single 295. What does everyone reckon?

The Corsairs seem to be the VTEC of PSU's. I could always upgrade if it starts to have fits.

Go with the 295.


Edit: Go with whatever you can get cheaper. 2X275, 2X280, or 1X295.

http://www.newegg.com/Product/...x?Item=N82E16814130492

$219 AMIR? That is a lot of power for ~ $450. I paid $449 for my first one :laugh:

 

[yh125d]

280sli ought to be pulling 500-550 raw watts at peak, which figuring 80% efficiency for that psu would be a 400-425w load as a maximum. Most of the time you're playing games, your system won't be quite at 100% load like it would during torture tests, so something in the 350-400w range for load while gaming is more likely, so the corsair should have no problems

 

[OCGuy]

Originally posted by: yh125d
280sli ought to be pulling 500-550 raw watts at peak, which figuring 80% efficiency for that psu would be a 400-425w load as a maximum. Most of the time you're playing games, your system won't be quite at 100% load like it would during torture tests, so something in the 350-400w range for load while gaming is more likely, so the corsair should have no problems

Ive seen the high 500s on my kill-a-watt, but that was only during the FC2 benchmark. COD4 tops out at ~545 (from the wall).

 

[thilanliyan]

It's best not to run the PSU close to maximum...they're most efficient at less than 100% load usually.

 

[yh125d]

Originally posted by: OCguy

Originally posted by: yh125d
280sli ought to be pulling 500-550 raw watts at peak, which figuring 80% efficiency for that psu would be a 400-425w load as a maximum. Most of the time you're playing games, your system won't be quite at 100% load like it would during torture tests, so something in the 350-400w range for load while gaming is more likely, so the corsair should have no problems

Ive seen the high 500s on my kill-a-watt, but that was only during the FC2 benchmark. COD4 tops out at ~545 (from the wall).

Maybe the 350-400w gaming number was a bit conservative, but even at those numbers the 620 (which is probably more like a 650 or higher knowing corsair) shouldn't have a problem, unless its more than a couple years old

 

[imported_Shaq]

260 Core 216 SLI and i7 @ 4Ghz I peak at 500 watts according to the built in meter on my APC. That is during gaming not the OCCT power supply test. That equates to 410 watts draw on a decent PS. I also have 4 Raptors, 4 case fans..etc. SLI 280's would add 70 watts tops. The 620 would be loaded at close to 80%, which is a little high, but should be fine. I had a Q6600 and a 295 before it died and it was only 20-30 watts lower.

 

[Piano Man]

That PS will be fine. There was review that had it running at 750W before it started to give weird readings. Thing is built like a truck.

 

[TemjinGold]

Originally posted by: yh125d
280sli ought to be pulling 500-550 raw watts at peak, which figuring 80% efficiency for that psu would be a 400-425w load as a maximum. Most of the time you're playing games, your system won't be quite at 100% load like it would during torture tests, so something in the 350-400w range for load while gaming is more likely, so the corsair should have no problems

Your math is off there. 80% efficiency means the PSU would still produce 620 watts; that 620 would just be 80% of the juice it's actually drawing.

 

[kyotousa]

just wondering is the computer running at 100% load when we play game such as crysis or some hard core FPS game?

I got 582watts using that calculator with 100% load and 25% capacitor age.
Should I get the Corsair 620watts anyway?

 

[yh125d]

Originally posted by: TemjinGold

Originally posted by: yh125d
280sli ought to be pulling 500-550 raw watts at peak, which figuring 80% efficiency for that psu would be a 400-425w load as a maximum. Most of the time you're playing games, your system won't be quite at 100% load like it would during torture tests, so something in the 350-400w range for load while gaming is more likely, so the corsair should have no problems

Your math is off there. 80% efficiency means the PSU would still produce 620 watts; that 620 would just be 80% of the juice it's actually drawing.

No. PSU ratings (500w, 650w, 750w) refer to the amount of power they can output, meaning the power leaving the psu to the components. Devices like kill a watts and other meters measure how much power is going into the psu from the wall. So imagine a 620w psu that is 80% efficient at 100% load (outputting 620w). 620 x 1/.8 = 775w. What this means is that for a 620w PSU that is 80% eff at 100% load (Like the corsair is) to go over spec it must pull more than 775w from the socket


So, as I stated earlier, a 280sli rig with overclocked quad core should be pulling 500-550w (I got that number from gtx280 reviews, not pulling out of my butt) from the socket. Let's figure a worst case scenario that it's using 600w. 600w x .8 = 480w, which is ~78% load for a 620w psu, which is fine. Most of the time it will be well under that

 

[TemjinGold]

Originally posted by: yh125d

Originally posted by: TemjinGold

Originally posted by: yh125d
280sli ought to be pulling 500-550 raw watts at peak, which figuring 80% efficiency for that psu would be a 400-425w load as a maximum. Most of the time you're playing games, your system won't be quite at 100% load like it would during torture tests, so something in the 350-400w range for load while gaming is more likely, so the corsair should have no problems

Your math is off there. 80% efficiency means the PSU would still produce 620 watts; that 620 would just be 80% of the juice it's actually drawing.

No. PSU ratings (500w, 650w, 750w) refer to the amount of power they can output, meaning the power leaving the psu to the components. Devices like kill a watts and other meters measure how much power is going into the psu from the wall. So imagine a 620w psu that is 80% efficient at 100% load (outputting 620w). 620 x 1/.8 = 775w. What this means is that for a 620w PSU that is 80% eff at 100% load (Like the corsair is) to go over spec it must pull more than 775w from the socket


So, as I stated earlier, a 280sli rig with overclocked quad core should be pulling 500-550w (I got that number from gtx280 reviews, not pulling out of my butt) from the socket. Let's figure a worst case scenario that it's using 600w. 600w x .8 = 480w, which is ~78% load for a 620w psu, which is fine. Most of the time it will be well under that

I guess I misunderstood what you originally said. We both understand it the same way, just different ways of saying it.

 

[yh125d]

Yeah I reread your post and now I see what you were getting at. Oh English language, how you burden us so!

 

[Dkcode]

Originally posted by: yh125d

Originally posted by: TemjinGold

Originally posted by: yh125d
280sli ought to be pulling 500-550 raw watts at peak, which figuring 80% efficiency for that psu would be a 400-425w load as a maximum. Most of the time you're playing games, your system won't be quite at 100% load like it would during torture tests, so something in the 350-400w range for load while gaming is more likely, so the corsair should have no problems

Your math is off there. 80% efficiency means the PSU would still produce 620 watts; that 620 would just be 80% of the juice it's actually drawing.

No. PSU ratings (500w, 650w, 750w) refer to the amount of power they can output, meaning the power leaving the psu to the components. Devices like kill a watts and other meters measure how much power is going into the psu from the wall. So imagine a 620w psu that is 80% efficient at 100% load (outputting 620w). 620 x 1/.8 = 775w. What this means is that for a 620w PSU that is 80% eff at 100% load (Like the corsair is) to go over spec it must pull more than 775w from the socket


So, as I stated earlier, a 280sli rig with overclocked quad core should be pulling 500-550w (I got that number from gtx280 reviews, not pulling out of my butt) from the socket. Let's figure a worst case scenario that it's using 600w. 600w x .8 = 480w, which is ~78% load for a 620w psu, which is fine. Most of the time it will be well under that

:thumbsup:

 

[1ManArmY]

Originally posted by: Dkcode

Originally posted by: 1ManArmY

Originally posted by: ghost recon88
Yea there's no way that PSU would work for a dual GTX280 + i7 setup. For that you want at least the HX1000. Even a GTX295 + i7 would probably struggle on the 620.

My friend was able to run 280 SLI with your PSU, but he sold it and upgraded to the HX1000 once he saw mine😀

Corsair PSU ratings are conservative you probably have a 750W power supply there. I know the HX1000 are 1200W just not certified

What made him upgrade?

I really don't know weather or not to go for GTX 280's or a single 295. What does everyone reckon?

The Corsairs seem to be the VTEC of PSU's. I could always upgrade if it starts to have fits.

He upgraded becaused he saw mine and thought it wouldn't hurt to have more power but he was perfectly fine with what he had. It just so happens another friend just upgraded his graphics card to GTX 260 216 and he was going to need a new power supply so he sold his to him and upgraded to the HX 1000