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2 x gtx 590 on a z68 motherboard

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November 20, 2011 11:01:52 PM

Hello every one ,

I have a question about the gtx 590s GPU,would 2 gtx 590 or 1 single GPU card + a gtx 590 be supported on a z68 mobo,and if yes,are there any compatibily issue on games or other software?

Thank you for helping me.
a c 261 U Graphics card
a c 243 V Motherboard
November 20, 2011 11:13:37 PM

I don't know why they would not be supported.
Some games do not play well with multiple gpu's, but they will still run very well.

A Z68 based motherboard will usually be able to have two X8 speed pcie x16 slots. There will be a minor performance impact that can be measured with a benchmark, but probably not be noticed by you.

Get a motherboard with widely separated pcie slots so you do not impact gpu card cooling.

Also, there are some high end Z68 motherboards that have added chips to give you two or more X16 speed x16 slots. Check that out.

Why do you contemplate the need for such gpu power??
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November 21, 2011 12:09:35 AM

Well first off,thank you for replying.

To answer you question I just wanna play most of the newest game at ultra setting hitting at least 60 fps.
Now I have gtx 580 and I know I'll be able to run game such BF3 without any probleme at 40-45 fps in ultra.
I just wanna hit 60 fps or more on those game and I also know that a 400 gtx serie and up would be enough to add power along with the gtx 580.
But I want it to last for the next couple coming years and I can afford a gtx 590.
I post this thread because knowing most of z68's mobos can phisicly support 2 gpu,I was just wondering if there would be any compatibility issus with dual gpu's cards.

Thank you again for your help.
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a c 261 U Graphics card
a c 243 V Motherboard
November 21, 2011 12:32:40 AM

luc_skysmoker said:
Well first off,thank you for replying.

To answer you question I just wanna play most of the newest game at ultra setting hitting at least 60 fps.
Now I have gtx 580 and I know I'll be able to run game such BF3 without any probleme at 40-45 fps in ultra.
I just wanna hit 60 fps or more on those game and I also know that a 400 gtx serie and up would be enough to add power along with the gtx 580.
But I want it to last for the next couple coming years and I can afford a gtx 590.
I post this thread because knowing most of z68's mobos can phisicly support 2 gpu,I was just wondering if there would be any compatibility issus with dual gpu's cards.

Thank you again for your help.


I don't think there is any compatibility issue. Using the normal x8/x8 slots would and a second GTX580 would be about as good as you can get. If you tried to sli a GTX4xx along with a GTX580 you would operate at the lower capability of the two cards. Not a great idea.

If you are going to buy a motherboard for sli GTX580, look for one which can run two cards at X16/X16. These will be high end motherboards like the GIGABYTE GA-Z68X-UD7-B3
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

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a b U Graphics card
November 21, 2011 12:52:39 AM

2xgtx590 could be bottlenecked by 2xpciex8 slots.

effectively, each gtx580 has 4x pcie bandwidth.
and quad sli scales poorly.
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November 21, 2011 2:12:18 AM

Yeah dam I got the GA-Z68X-UD4-B3 which feature a x16/x8 :(  !

Ok so I understand that if an other GPU will be added both will run at x8.
So if i go in SLI I'll probably better to get an other gtx 580 than the gtx 590.
What do you think guys?

Thanks again.
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a b U Graphics card
November 21, 2011 2:24:48 AM

If you go SLI your only option is another GTX 580. You cannot SLI different GPU configurations. It must be the same GPU and the same amount of RAM on each card or it wont even give you the option to SLI.

2x GTX 580 will be more than enough to max anything out, if anything its overkill for the resolution you play at. I max everything with 2 GTX 580's easily hitting 60fps+ and I game at 2560x1440.
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a b U Graphics card
November 21, 2011 2:26:30 AM

No your board doesnt run 16x/8x, when two cards are installed it will run 8x/8x

Just get another Gtx 580, it is the best idea in my opinion, you will have the best part of SLI scaling (from 1 to 2 cards is the biggest jump), and you wont bottleneck the second card you add in. Since pci-e 2.0 at 8x should be fine for a gtx 580 sli.

Although I would agree with Energy96 that you are pretty much wasting your money because it's overkill by far...
On my single 6850 (much weaker than your card) on bf3 I just turn shadows from ultra to high and get a pretty large performance advantage, why not sacrifice so little (there is virtually no visual difference from ultra to high) and save like what $400?
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a c 143 U Graphics card
a b V Motherboard
November 21, 2011 2:28:29 AM

@ luc_skysmoker

Regarding the x16/x8 thing;
There's no difference between x16/x16 configuration, as stated by geofelt it's a slight performance increase that would be noticed if you ran a benchmark program like 3D mark, but in real world performance there's no increase at all.

Regarding the GTX 590 in SLI vs GTX 580s in SLI;
- GTX 590s in SLI is the ultimate gaming performance ever but they produce a lot of heat as they are reference design cards and too noisy, you'd feel like you're running a vacuum machine when the GPUs are in full load, same thing for HD 6990s in CF.
- You need to have a strong CPU such as the 2600K to handle those GPUs in SLI and benefit from the GPUs scaling.
- If you're running a single 1080P monitor and wanna play all the games @ 60 FPS then you should consider the GTX 570s/80s in SLI, Up coming GTX 6K series are said to be using XDR2 rambus memory which is twice faster than GDDR5 that's a nice reason not to pay $1500 for GPUs when a single high end one from the 6K series will perform better.
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a c 143 U Graphics card
a b V Motherboard
November 21, 2011 2:30:17 AM

@ mayankleoboy
I don't understand what you're saying but i can emphasize that's extremely wrong.
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November 21, 2011 3:00:17 AM

Ok guys I really apreciated your help and thank you again to have spent some time to help me.
So I've understood that I'll better get an another gtx 580 and that gtx 590 / 580 cannot be SLIed together.I don't know when the 6xx serie come out but I should wait and keep my money to buy one of those.Also from what I understood from energy26 my gtx 580 will be useless with a gtx 6xx serie cause I won't be able to SLI 2 different GPU's card configuration.
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November 21, 2011 3:00:32 AM

If you want to SLI 2 GTX590's get a X79 motherboard.
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a c 143 U Graphics card
a b V Motherboard
November 21, 2011 3:06:32 AM

luc_skysmoker said:
Ok guys I really apreciated your help and thank you again to have spent some time to help me.
So I've understood that I'll better get an another gtx 580 and that gtx 590 / 580 cannot be SLIed together.I don't know when the 6xx serie come out but I should wait and keep my money to buy one of those.Also from what I understood from energy26 my gtx 580 will be useless with a gtx 6xx serie cause I won't be able to SLI 2 different GPU's card configuration.

Good decision, a single GTX 580 is able to max out most of the games @ 60FPS, even if 35-40 FPS the game is greatly playable and no issues at all.
Save the money for the GTX 6k series, they will be out @ Q1 2012.
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a b U Graphics card
November 21, 2011 3:26:43 AM

yes I agree with ilysaml completely
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November 21, 2011 3:16:22 PM

Agreed, another 580 is def the best option, and more than sufficient.

For the record, I have a 590, and it by itself would likely have been satisfactory for your needs.
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November 21, 2011 3:48:05 PM

Thank you all for your advice,but I'll just wait for the GTX 6xx serie.I'll just overclock my current gtx 580 to get a bit more power while waiting for my new one.
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a b U Graphics card
November 21, 2011 4:31:29 PM

mayankleoboy1 said:
2xgtx590 could be bottlenecked by 2xpciex8 slots.

effectively, each gtx580 has 4x pcie bandwidth.
and quad sli scales poorly.

LOL!
Link: http://www.youtube.com/watch?v=rSfifE2Domo
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a b U Graphics card
November 21, 2011 5:02:46 PM

OP you will not be sliing a 4XX series gpu with your current 580, the easy solution is to wait a while til the next gen drops and get a smoking deal on a second gtx 580 for maybe 350bucks, buying a 590 to sli with your 580 is an absolute waste imo
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a b U Graphics card
November 21, 2011 11:46:51 PM

jjb8675309 said:
buying a 590 to sli with your 580 is an absolute waste imo


It's not a waste, its absolutely impossible due to hardware design.

Another tidbit to consider also, 2 x GTX 580 in SLI outperform a single GTX 590, even though the 590 is essentially 2 gtx 580 GPU's on a single card. Since you already have a 580 getting another is the best choice from both a performance standpoint and a financial one.

You can wait for the new 6 series card but you would likely have to get 2 of them in order to beat out (performance wise) the cheaper solution of adding a second 580. 2x 580 in SLI will more than likely still beat a single 6 series as it is extremely unlikely that the 6 series card will be double the performance of the 5 series card. It will probably take until the 7 or 8 series card to double performance unless some massive change in hardware technology occurs. I would still recommend getting another 580 now unless you fully plan on buying two 6 series cards to SLI when they come out.
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November 28, 2011 11:01:07 PM

Best answer selected by luc_skysmoker.
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