Using gtx760 sli and gtx 770 on 750w psu

Toggle sidebar Toggle sidebar
C

caboose2253

Honorable
Dec 5, 2013
60
0
10,630
Ok so Here is my rig roughly

Intel i5 3570k overclocked to 4.1ghz
Asus p8z77v-deluxe mobo
Consair 750w psu
2-8 gig ddr3
2-4 gig ddr3
5-various size sata drives
1-500gb ssd
1-gtx 770
1-gtx 760
1-soundblaster zx soundcard
1-4 port sata raid card
2-blu ray burners
1-dvd burner
5-various size fans


What I'm wanting, and trying to do, is add a 2nd gtx 760 into the system and have 2-sli 760s and my 770 running. HOWEVER I'm worried about power. If I use my consair 750w, I have to buy molex splitters, and then use a 2 molex-2 pci-e adapter to be able to plug in all the cards. But I might have to use as many as 3 molex splitters just to make that possible.

However I also have a 850w psu, that is a kentek 850w that I would have to adapt as well, but it would have more power, but might not be able to connect to everything else in the system....do you think the 750w could handle the system with the 3 graphics cards? Or should I consider maybe doing a 2 psu setup and have the 850w running the gpu's by themselves?

Should also mention I don't have the money for a bigger psu which is what I'd rather do. Just trying to work with what I have.
 
Solution
4745454b
I get that. I remember being a broke college student. I wasn't sure if the 5 drives were all old 250-1TB disks, or current 4TB+ drives. From what you listed it really seems like you are using whatever you can. Which is why I said what I did. And I stand by that. Two 760s at $80 each is $160. A 770 is another $100? $260? Maybe $280? That sounds like a 1060 to me, which will be a lot more powerful than an SLI setup of 760s. Which as DSzymborski won't even work on Fortnite. I can see burning disks for family, but three at a time? If you are worried about power draw you really should consider pulling some of the stuff out of there. It's just drawing power. I honestly believe there has to be a way for you to sell the GPUs...
Sort by date Sort by votes
C

caboose2253

Honorable
Dec 5, 2013
60
0
10,630
Honestly, I was going to use it to run some other monitors, I have 3 1920x1080 monitors hooked up to my system, one I use for my games and the other 2 for system info and other stuff while gaming, like obs. I've never done a SLI config before so I wasn't sure how easy or how much strain it would put on the config using all 3 while playing games at HD res with full graphics.
 
Upvote 0 Downvote
DSzymborski

DSzymborski

Curmudgeon Pursuivant
Moderator
Nov 19, 2010
20,873
5,106
106,640
Kentek PSUs are garbage, made by Leadman/Powmax, so it's the Corsair or a new one.

I don't think there's a need for *3* GPUs, either. I don't even think there's a need for a second from what you describe. Surfing the web uses very few GPU resources and OBS cares a lot more about the CPU, not additional GPU powering.
 
Upvote 0 Downvote
C

caboose2253

Honorable
Dec 5, 2013
60
0
10,630
No I do a lot of gaming, most recently fortnite. I'm getting from the gtx 770 roughly 40-60fps with high setting and I my 760 is identical to the one I just got today, so I was planning on putting them in sli for gaming purposes
 
Upvote 0 Downvote
4745454b

4745454b

Titan
Moderator
Apr 29, 2006
29,241
437
93,590
My standard advice is to never use adapters to force your PSU to power things. If they wanted you to power 3 high end cards like that, they would have provided the plugs needed. Using adapters to force your PSU to power a setup it wasn't designed to do is only asking for trouble. Just don't.

is add a 2nd gtx 760 into the system
Click to expand...

Why? I know I'm going to seem rude, but you seem to have a very piecemeal setup there. 3 optical drives? 5 random size spinning disks? A soundblaster zx? Mixed ram? It seems to me you are just plugging in anything you can find so your PC is "cool". Why buy/get another GTX760? SLI and multi GPU setups are losing ground, not gaining. Like most of the things in your setup, SLI is going away. Why move to it now? Don't buy the 760. Sell your 760, and 770 and get a single better GPU. Might want to do the same for your drives. What on earth would three burners be used for? It seems to me that you could get rid of a lot of the stuff in your PC, and with the money gained by selling it build something that makes a lot more sense.
 
Upvote 0 Downvote
DSzymborski

DSzymborski

Curmudgeon Pursuivant
Moderator
Nov 19, 2010
20,873
5,106
106,640


Oh, then this is easy then. Last I checked, Fortnite doesn't get any benefit from SLI. The only workaround is to force alternate frame rendering, which crashes more people's Fortnite than it helps. Even if it works, you'll likely have micro-stuttering. Except for the very high-end, crossfire/SLI are about as dead as disco.

But even if you can get 2x760 working with Fortnite, for the sake of argument, I still don't see why you also need a 770 in there. If you're doing anything that needs anywhere near a 770 *while* playing a game on 760x2, you're going to max out your CPU already.

As 474 notes, you're really getting into FrankenRig territory here, a mishmash of things thrown together. I think you need to take a step back, figure out what your needs *actually* are, and then edit. Your desired GPU solution, as far as I can tell, has little to do with the things you'd like to do with your PC.
 
Upvote 0 Downvote
C

caboose2253

Honorable
Dec 5, 2013
60
0
10,630
Everything in there has a purpose, I do, believe it or not, a lot of disk burning for family who don't know how to stream and use online media. The 5 disks are for family backups and various media, I have roughly 20tb worth of data on the computer. The ram isn't mixed its 2 kits, just bought at different times for 24gb ram. And I didnt pay anything for the gpu's. Unfortunately some of us are not wealthy enough to afford 700 dollar graphics cards, and selling the cards I have wouldn't even get me a 1070 since they are so in demand. And the soundcard is for high definition sound, and the fact the rear audio ports on my motherboard, for some reason, stopped working. Yea its piecemeal to a degree, but some of us cannot afford to drop 2 grand ever on a decent set up. I have been off work for 4 months due to severe medical issues, and still am suffering. I have no current income. So yea, i have to work with what I got and what's given to me. And I love my set up, as piecemeal as it may be.
 
Upvote 0 Downvote
4745454b

4745454b

Titan
Moderator
Apr 29, 2006
29,241
437
93,590
I get that. I remember being a broke college student. I wasn't sure if the 5 drives were all old 250-1TB disks, or current 4TB+ drives. From what you listed it really seems like you are using whatever you can. Which is why I said what I did. And I stand by that. Two 760s at $80 each is $160. A 770 is another $100? $260? Maybe $280? That sounds like a 1060 to me, which will be a lot more powerful than an SLI setup of 760s. Which as DSzymborski won't even work on Fortnite. I can see burning disks for family, but three at a time? If you are worried about power draw you really should consider pulling some of the stuff out of there. It's just drawing power. I honestly believe there has to be a way for you to sell the GPUs, maybe a blu ray burner and perhaps a smaller drive or two, and have the money to get a 1060.

https://hardforum.com/threads/32gb-ddr4-7700k-5820k-1060-6gb.1958363/

1060s for $250. Would be much faster and better than an SLI setup of 760s. Again, not trying to be a jerk though I'm sure you think I'm a horrible person. Just trying to think outside the box and help you with a system that seems to be taking over.
 
Upvote 0 Downvote
Solution
delaro

delaro

Judicious
Ambassador
Aug 23, 2011
4,428
250
33,740
If I was going to run a SLI it would be with 2X 770's and not 2X 760's. a 760 SLI is slower than a 970 GTX "$180-$225" You could sell both your GPU's and grab a 970 which handles Fortnight @ 70+ fps without the SLI annoyances on low end GPU's.

Selling

760 GTX... ~ $70
770 GTX ... ~ $90+
...........................
$160+

Buying Example

EVGA GeForce GTX 970 4GB "SuperClocked" ACX 2.0 $190 shipped
https://www.reddit.com/r/hardwareswap/comments/8c2nkx/usamn_h_evga_gtx_970_4gb_sc_acx_20_w_paypal_local/
 
Upvote 0 Downvote
4745454b

4745454b

Titan
Moderator
Apr 29, 2006
29,241
437
93,590
It seems he already got another 760 already.

my 760 is identical to the one I just got today.
Click to expand...

I read this as he has two 760s, and a 770. There "has" to be some way to sell both 760s for some cash, and the 770. Assuming he gets "normal" used prices, he should end up with at least $250, probably more. Which should be enough to get a 1060, 970, 980, etc. Those are all gaming cards without SLI or driver issues. I could see keeping the 7xx cards if he was mining on all them, but he didn't say he was mining when asked about it. I'm really hoping it just didn't occur to him that he could sell these cards and get enough for something good. While a 1070 or 1080 would be a great card to have, even a 1060 should power what he wants and do ok.
 
Upvote 0 Downvote
You must log in or register to reply here.

TRENDING THREADS

Latest posts

Moderators online

Share this page

COMPANY
RESOURCES
FOLLOW
Top Bottom