Gtx 660 SLI?

[Derik22]

Hi guys i'm planning to buy msi gtx 660 twin frozr (non-ti) in SLI,i have seasonic 620gm 620w, this is my curent setup:

Haf 912 Plus
I5 3570k @4.2ghz 1.152v
Corsair H60
MSI Z77A-GD55
2x4gb kingston 1600mhz
2tb WD green
500gb WD blue
Intel 520 180gb
Seasonic 620GM
Gtx 580

 

[FalseChristian]

I'm getting the same setup as you. Does your PS have 2 6-pin GPU connectors? You'll need those. 1 of our GTX 660 is 70% faster than 1 of my GTX 460 1GB. You should be good until the Maxwell GTX 8xx series comes out.

 

[Derik22]

My psu have one 6pin and 6+2pin also have two rails 12v1 24A and 12v2 24a so total 576w but is it enough for my setup?

 

[toyota]

I'm getting the same setup as you. Does your PS have 2 6-pin GPU connectors? You'll need those. 1 of our GTX 660 is 70% faster than 1 of my GTX 460 1GB. You should be good until the Maxwell GTX 8xx series comes out.

are you sure? so lets see...gtx670, gtx660, gtx660ti, gtx650 ti boost and even waiting for gtx860 and gtx750 ti boost have been what you are going with just in the last few weeks. lol



http://forums.anandtech.com/showpost.php?p=34999445&postcount=8

http://forums.anandtech.com/showpost.php?p=35034414&postcount=919

http://forums.anandtech.com/showpost.php?p=34996052&postcount=1

http://forums.anandtech.com/showpost.php?p=35082750&postcount=13

http://forums.anandtech.com/showpost.php?p=34898966&postcount=64

 

[Jodiuh]

I've had 2 660s for a couple months now. My conclusion? SLI is balls. BF3 and GRID 2 perform poorly with terrible scaling that's all over the place. Sometimes its 90%, sometimes its -20%.

 

[Rezist]

I would still opt single card over multi-card. Too bad the 760ti isn't out yet probably would be a great fit.

 

[Eureka]

Your power is fine. I'm running two OCed 7950s and an OCed 3570K off of a 600W power supply.

For the price you'd pay for those 660s, I'd recommend getting a 7970 or 770. mGPU is more of a headache than it's worth, IMO.

 

[Face2Face]

Your power is fine. I'm running two OCed 7950s and an OCed 3570K off of a 600W power supply.

For the price you'd pay for those 660s, I'd recommend getting a 7970 or 770. mGPU is more of a headache than it's worth, IMO.

Really....? What kind of PSU do you have?

 

[Eureka]

Surprisingly enough, an OCZ Modxstream 600W PSU. I'm pulling power for my second card through molex adapters but it works.

i5-3570K at 1.3V for 4.6 GHz
WF3 7950 at 1.25V (stock) for 1000/1250
Sapphire 7950 at stock for 1000/1250

It's been mining and gaming for 24 hours and no power issues yet. I'm pretty sure it's at the limit but I'm not going to keep it running at this for very long so I'm not too worried about long-term durability. Originally I thought I would have to downclock everything to stock (and the WF3 to stock 7950 levels) but it's been going fine.

 

[Jodiuh]

mGPU is more of a headache than it's worth, IMO.

This x 1000.

 

[Face2Face]

Surprisingly enough, an OCZ Modxstream 600W PSU. I'm pulling power for my second card through molex adapters but it works.

i5-3570K at 1.3V for 4.6 GHz
WF3 7950 at 1.25V (stock) for 1000/1250
Sapphire 7950 at stock for 1000/1250

It's been mining and gaming for 24 hours and no power issues yet. I'm pretty sure it's at the limit but I'm not going to keep it running at this for very long so I'm not too worried about long-term durability. Originally I thought I would have to downclock everything to stock (and the WF3 to stock 7950 levels) but it's been going fine.

Wow.. Pretty crazy. Sometimes I feel like my power supply is not enough for just one 7950 @ 1250/1650. Playing Crysis 3 the PSU becomes the loudest fan in the system. Silencer my A$$ - I really need to get a Kila-watt or a quieter PSU

 

[Eureka]

Wow.. Pretty crazy. Sometimes I feel like my power supply is not enough for just one 7950 @ 1250/1650. Playing Crysis 3 the PSU becomes the loudest fan in the system. Silencer my A$$ - I really need to get a Kila-watt or a quieter PSU

Well, you are at 1250, and what voltage is that? The power consumption does not increase linearly with clock and voltage...

Guru3D did a power consumption test, they calculated roughly 135W per card. So with two cards at 260W (add another 50-100W for overclock and fudge factor) and a CPU that draws 100W at max, it should still be within my 500W 12V rail.

 

[Face2Face]

Well, you are at 1250, and what voltage is that? The power consumption does not increase linearly with clock and voltage...

Guru3D did a power consumption test, they calculated roughly 135W per card. So with two cards at 260W (add another 50-100W for overclock and fudge factor) and a CPU that draws 100W at max, it should still be within my 500W 12V rail.

1.185v on the core. 135W on each card sounds awful low for a 7950 @ stock. But hey if it works it works. I'm impressed. :thumbsup:

 

[Fastx]

Fwiw guys.

http://www.realhardtechx.com/index_archivos/Page362.htm

 

[Derik22]

For single gpu i can choose gtx 770 lightning but problem is it have 2x8 pin and my psu have one 6pin and 6+2pin,so i must use 6 to 8pin adapter for gpu but i don't how much safe is to use 6pin to 8pin adapter and i also want to oc a little more?

 

[TakeNoPrisoners]

For single gpu i can choose gtx 770 lightning but problem is it have 2x8 pin and my psu have one 6pin and 6+2pin,so i must use 6 to 8pin adapter for gpu but i don't how much safe is to use 6pin to 8pin adapter and i also want to oc a little more?

It will be fine. I had a Gtx 680 lightning at 1333mhz on the core and 7200mhz on the memory with extreme overvolts on both and the tower barely drew 400w with an ivy i7 at 4.4ghz. This was with a 6 pin to 8 pin adapter for the video card.

 

[Derik22]

It will be fine. I had a Gtx 680 lightning at 1333mhz on the core and 7200mhz on the memory with extreme overvolts on both and the tower barely drew 400w with an ivy i7 at 4.4ghz. This was with a 6 pin to 8 pin adapter for the video card.

You used adapter from gtx 680 package?

 

[UNhooked]

Get the GTX 770 over the SLI GTX 660

 

[Derik22]

So it's safe to use 6 to 8 pin adapters?

 

[UNhooked]

So it's safe to use 6 to 8 pin adapters?

Ahh I see what you mean. I am honestly not sure. I know the 8 pin is required to draw more power. Perhaps go with another GTX 770?

 

[guskline]

Hi guys i'm planning to buy msi gtx 660 twin frozr (non-ti) in SLI,i have seasonic 620gm 620w, this is my curent setup:

Haf 912 Plus
I5 3570k @4.2ghz 1.152v
Corsair H60
MSI Z77A-GD55
2x4gb kingston 1600mhz
2tb WD green
500gb WD blue
Intel 520 180gb
Seasonic 620GM
Gtx 580

I have 2 660s in sli in a FX 8320 rig OC'd to 4.3 Ghz. LOVE it. However, I already owned a 660 and later added the second for @$200. Also the GTX 770 was not out at that time. Now? Buy a single GTX770 which should be @ the same as 2 660s in sli both in price and performance.

 

[bystander36]

While SLI isn't bad, I also recommend getting a single 770 instead. There is more frame variance in SLI and it's not supported in all games.

 

[Derik22]

Ahh I see what you mean. I am honestly not sure. I know the 8 pin is required to draw more power. Perhaps go with another GTX 770?

Gigabyte GTX 770 Widforce 3X or Palit Jetstream they have 6pin and 6+2pin

 

[UNhooked]

Says over here the Palit has better VRMS and also has a decent factory OC.

http://www.techpowerup.com/reviews/Palit/GeForce_GTX_770_Jet_Stream/1.html

How is the warranty for Palit?

 

[iFati]

from that revie it seems with a 750 u can handle every gpu single.