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750w XFX able to run GTX 770s in SLI?

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  • Gtx
  • XFX
  • Graphics Cards
  • SLI
  • Graphics
Last response: in Graphics Cards
July 22, 2013 8:44:14 AM

I am going to be upgrading to Haswell and my Graphics cards are coming along for the ride.

I will be snagging an i5 4670k with a new Motherboard. Will my PSU have anough leftover to run two 770's in SLI?

I'm looking at this model:
http://www.amazon.com/Gigabyte-GDDR5-4GB-WINDFORCE-Grap...

I've tried calculating, but I'm still noobish...

More about : 750w xfx run gtx 770s sli

a b U Graphics card
July 22, 2013 8:52:37 AM

stat30fbliss said:
I am going to be upgrading to Haswell and my Graphics cards are coming along for the ride.

I will be snagging an i5 4670k with a new Motherboard. Will my PSU have anough leftover to run to 770's in SLI?

I'm looking at this model:
http://www.amazon.com/Gigabyte-GDDR5-4GB-WINDFORCE-Grap...

I've tried calculating, but I'm still noobish...


yea it should work, but to be safe, you have to look at the amps provides by the 12vrail on ur psu. What model is the psu?
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July 22, 2013 8:56:22 AM

oczdude8 said:
stat30fbliss said:
I am going to be upgrading to Haswell and my Graphics cards are coming along for the ride.

I will be snagging an i5 4670k with a new Motherboard. Will my PSU have anough leftover to run to 770's in SLI?

I'm looking at this model:
http://www.amazon.com/Gigabyte-GDDR5-4GB-WINDFORCE-Grap...

I've tried calculating, but I'm still noobish...


yea it should work, but to be safe, you have to look at the amps provides by the 12vrail on ur psu. What model is the psu?


I have this model:
XFX PRO750W Core Edition 80+ Bronze ATX 750 Energy Star Certified Power Supply - P1750SNLB9
http://www.amazon.com/gp/product/B0045L4BJ6/
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a b U Graphics card
July 22, 2013 9:02:27 AM

There are 62 amps on that +12v rail and Nvidia's requirement is 62 amps.
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July 22, 2013 9:08:47 AM

sophiebeth100 said:
There are 62 amps on that +12v rail and Nvidia's requirement is 62 amps.


So does that mean it will work ok, or could I see performance issues?

I will be interested in Overclocking my Processor. Though I doubt I will have any interest in Overclocking the GPU's.
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a b U Graphics card
July 22, 2013 9:12:00 AM

stat30fbliss said:
oczdude8 said:
stat30fbliss said:
I am going to be upgrading to Haswell and my Graphics cards are coming along for the ride.

I will be snagging an i5 4670k with a new Motherboard. Will my PSU have anough leftover to run to 770's in SLI?

I'm looking at this model:
http://www.amazon.com/Gigabyte-GDDR5-4GB-WINDFORCE-Grap...

I've tried calculating, but I'm still noobish...


yea it should work, but to be safe, you have to look at the amps provides by the 12vrail on ur psu. What model is the psu?


I have this model:
XFX PRO750W Core Edition 80+ Bronze ATX 750 Energy Star Certified Power Supply - P1750SNLB9
http://www.amazon.com/gp/product/B0045L4BJ6/


Unfortunately not, each standard gtx 770 requires 42A and since you are getting 2 OC models, expect to need about 90A
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a b U Graphics card
July 22, 2013 9:21:30 AM

90A would be plenty for 770 three-way SLI. Nvidia specifies 62 amps is all you'll need.
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a b U Graphics card
July 22, 2013 9:35:34 AM

sophiebeth100 said:
90A would be plenty for 770 three-way SLI. Nvidia specifies 62 amps is all you'll need.


Do you mind posting a link for this? I checked and each 770gtx(non OC) requires 42A.
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July 22, 2013 9:51:45 AM

I am only wanting to attempt a 2-way SLI.

So would I even be able to pull of 760's in 2-way SLI?
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a b U Graphics card
July 22, 2013 9:54:41 AM

oczdude8 said:
sophiebeth100 said:
90A would be plenty for 770 three-way SLI. Nvidia specifies 62 amps is all you'll need.


Do you mind posting a link for this? I checked and each 770gtx(non OC) requires 42A.


They don't require 42A per card, they require 42A supplies from the PSU. The card won't be using up all of the amps supplies by the PSU, meaning you don't have to double the amps when adding another card. Take a look at this thread: http://www.tomshardware.com/answers/id-1711435/psu-good...
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July 22, 2013 10:24:26 AM

So basically what I am getting from this post is that in my current set-up, I should be able to add a single 770 for the time being, and can upgrade my PSU to roughly a 1000w with sufficient amps for 770's in 2-way SLI at a later date.

Perhaps someone could recommend a good PSU that will perform the tasks I am wanting it to?

I have made a lot of mistakes with my first custom build (the one in my signature), and would like to avoid many of these hiccups when I overhaul my system right now.
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a b U Graphics card
July 22, 2013 10:29:22 AM

oczdude8 said:
sophiebeth100 said:
90A would be plenty for 770 three-way SLI. Nvidia specifies 62 amps is all you'll need.


Do you mind posting a link for this? I checked and each 770gtx(non OC) requires 42A.


stat30fbliss said:
So basically what I am getting from this post is that in my current set-up, I should be able to add a single 770 for the time being, and can upgrade my PSU to roughly a 1000w with sufficient amps for 770's in 2-way SLI at a later date.

Perhaps someone could recommend a good PSU that will perform the tasks I am wanting it to?

I have made a lot of mistakes with my first custom build (the one in my signature), and would like to avoid many of these hiccups when I overhaul my system right now.


The 850w version of the PSU you listed will definitely be plenty, but I think you could manage it with the 750w. Looking at your build.. why not just add a second 660ti?
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July 22, 2013 10:58:10 AM

sophiebeth100 said:

The 850w version of the PSU you listed will definitely be plenty, but I think you could manage it with the 750w. Looking at your build.. why not just add a second 660ti?


My motherboard is Crossfire compatible, but not SLI. The lack of SLI support is what spawned this string of upgrades to where I find myself now overhauling my whole machine. My end goal for all of these upgrades is to play Planetside 2 accross 3x27" monitors in 1080p. And to have a solid build set up that I can rely on for the next 2-3 years that I wont have to worry about upgrading 1 component here, and another there.

I have learned a lot of lessons from my first build, and it is currently worth it to me to just pay for the premiums now and then rest easy for a while.

Also, I have found sources touting the 770's in 2-way SLI the best cost/performance increase, and will push everything out accross 3 monitors at high/ultra settings except for Crysis 3, which I dont play.

byogamingpc said:
I'd go with a TX850 http://amzn.to/11DR1nn and your Gigabyte GTX 770 WF 4GB's http://amzn.to/16OAqkj This setup would be quite nice.


Thanks for the suggestions!
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a b U Graphics card
July 22, 2013 11:16:08 AM

stat30fbliss said:
sophiebeth100 said:

The 850w version of the PSU you listed will definitely be plenty, but I think you could manage it with the 750w. Looking at your build.. why not just add a second 660ti?


My motherboard is Crossfire compatible, but not SLI. The lack of SLI support is what spawned this string of upgrades to where I find myself now overhauling my whole machine. My end goal for all of these upgrades is to play Planetside 2 accross 3x27" monitors in 1080p. And to have a solid build set up that I can rely on for the next 2-3 years that I wont have to worry about upgrading 1 component here, and another there.

I have learned a lot of lessons from my first build, and it is currently worth it to me to just pay for the premiums now and then rest easy for a while.

Also, I have found sources touting the 770's in 2-way SLI the best cost/performance increase, and will push everything out accross 3 monitors at high/ultra settings except for Crysis 3, which I dont play.

byogamingpc said:
I'd go with a TX850 http://amzn.to/11DR1nn and your Gigabyte GTX 770 WF 4GB's http://amzn.to/16OAqkj This setup would be quite nice.


Thanks for the suggestions!


770s in sli are very strong, and I also think that your are right in going all out in a rig so you don't have to touch it for a long time. I think a 850w would be okay, but again, I do recommend a 1000w if you have room in your budget and if you want to rest easy. To use the 750w would be a BIG gamble.

In terms of planetside, I find its very un-optimized. I am having issues with it because it is only using 2 cores out of my 8 cores (4normal+4HT) on my old i7 920 oc to 4ghz. I have a 660ti as well and the game tells me that cpu is bottlenecking my game and I get really strange fpses
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July 22, 2013 11:31:05 AM

oczdude8 said:

770s in sli are very strong, and I also think that your are right in going all out in a rig so you don't have to touch it for a long time. I think a 850w would be okay, but again, I do recommend a 1000w if you have room in your budget and if you want to rest easy. To use the 750w would be a BIG gamble.

In terms of planetside, I find its very un-optimized. I am having issues with it because it is only using 2 cores out of my 8 cores (4normal+4HT) on my old i7 920 oc to 4ghz. I have a 660ti as well and the game tells me that cpu is bottlenecking my game and I get really strange fpses


Tell me about it... My CPU is the bottleneck in the Warpgate! I am heavily invested in this game, and am really pulling for them to get their shit together with optimization. But even with Battlefield 4 on the horizon, I am looking to beef things up.

I have just added this Corsair Professional Series AX 1200 Watt to my wishlist, and will be picking it up one of these paychecks down the road.
http://www.amazon.com/Corsair-Professional-Series-Modul...

My current timeline is:
Motherboard and i5 4670k first
Then first 770
then PSU
Then Second 770
Then my third 27"

Ill be getting the mobo and CPU at once. Then the rest will happen 1 per paycheck.

Ill be happily gaming by this fall, and ready to hibernate alllll winter :) 
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