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Will two 8800GTS 640 cards support 2560 x 1600?

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Last response: in Graphics & Displays
November 30, 2008 12:37:50 PM

I am considering purchasing a 30" monitor and want to make sure I have enough GPU to support this choice. I currently only have 1 8800GTS but would have to buy a new mother board and a second card.

Is this a good solution or do I need to step up to a 4850 or something of the like?

Any opinions would be welcome.


CPU: Intel E6850
RAM: 2GB DDR2 800MHz Patriot PC2-6400 (4-4-4-12)
GPU: EVGA 8800 GTS 640MB
Power: 620W Zero dba

More about : 8800gts 640 cards support 2560 1600

a b U Graphics card
November 30, 2008 1:04:22 PM

8800gts i not going to cut it at that resolution or even the 4850. at least aim for a 4870 or gtx 260. to get best performance get a 4870x2 or gtx280.
a c 177 U Graphics card
November 30, 2008 1:24:00 PM

What you have isn't bad. At that res, its the video card thats holding you back. Get the 4870 1GB, the 4870x2, or the GTX280/260.
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November 30, 2008 1:34:25 PM

Thanks invisik. Are you saying I need at least 2 4870's in crossfire mode?
November 30, 2008 1:53:36 PM

For the money, would I be better off performance wise with 2 gtx260's?

1 x 4870x2 = $470
2 x gtx260 = $420

i.e. will the 4870x2 give me similar performance to 2 x 260's? Or am I better off spending a little more cash on the 4870x2 and have room to upgrade to a second one when the come down in price?

Thanks for all your help!
a b U Graphics card
November 30, 2008 2:06:24 PM

Both cards should perform well but the 4870x2 will take the lead by a bit.
There is no point in adding 2 4870x2 because they dont scale well at all.
In my opinion if you dont mind spending a little more the 4870x2 would be the way to go but the gtx.260 sli shouldnt be to far off.
Do you like to play games such as crysis and farcry 2? they tend to play better on nvidia cards
November 30, 2008 2:06:53 PM

The performance from the 4870X2 is slightly greater, and it costs slightly more than GTX260 so value wise it's the same.

I would go with the 4870X2 because you will not be forced to get an SLI motherboard, as you would be with GTX 260 SLI. The nvidia chipsets on average tend to not overclock well, among other things, and are more expensive than necessary.

The money you would spend on the nvidia motherboard will probably negate the amount you would save by going with the SLI configuration anyways.
November 30, 2008 2:17:07 PM

I wasn't thinking about 2 4870x2's out of the gate, just more for future expansion. So are you saying that the 4870x2 would never be good in crossfire? Would the GTX 280 be better?

As it stands, for me to go to a 4870x2 I would need to purchase a new motherboard. Would it make more sense for me to go to a SLI board, get a GTX 280 and add another in SLI when I can afford it?
November 30, 2008 2:40:13 PM

Why do you need a new mobo if you get a 4870x2?

Also if your talking x2s and sli, you better have one hell of a power supply and CPU, or your wasting your time and money.
November 30, 2008 2:44:11 PM

Thanks roadrunner. Doesn't the 4870x2 require the PCI-E 16 2.0 slot? My board is not 2.0.

Yea I would have to purchase a new power supply if/when I bought the 2nd vid card.
November 30, 2008 2:56:02 PM

PCI-E 2.0 is backwards compatable with PCI-E 1.1 You will have no problems putting a 4870x2 into your board.
November 30, 2008 3:01:29 PM

Maybe I'm confused, but the card requires a 2.0, my board is a 1.1, how can my board support a 2.0?

What you stated says that a 2.0 board will support a 1.1, which I understand but either the 4870x2 does not need 2.0, or you misunderstood that my board is not 2.0.

Can you clarify?
a b U Graphics card
November 30, 2008 3:25:12 PM

the 4870x2 only requires one pcie slot. quad gpu isnt optimized and probably wont me till the next 2 gen in my opinion. stick with your mobo and just get the 4870x2. as for ur psu that psu should be able to handle it. the 4870x2 does not require pcie2.0 1.1 is fine.
November 30, 2008 3:35:51 PM

Awesome, thanks invisik!

And thanks everyone else!
December 5, 2008 9:31:11 PM

So I purchased the monitor and the 4870 x2. I can run any resolution on my desktop, but when I am in game, it runs for like a minute then the system reboots. I've tried several games and the same thing happens. This tends to only happen at higher resolutions.

Could it be that my power suply is not up to the task? Any way I can tell?
I cranked up the fan to 100% on the card so it can't be overheating.

Any ideas on how to figure this out?
a b U Graphics card
December 5, 2008 9:41:44 PM

It could be your PSU. What kind is it?
December 5, 2008 9:47:02 PM

More than likely the PSU like cjl says. The 4870X2 needs quite a bit...quite a bit. Youre probably going to need something like the 750W Corsair
December 5, 2008 10:43:47 PM

As stated above:


CPU: Intel E6850
RAM: 2GB DDR2 800MHz Patriot PC2-6400 (4-4-4-12)
GPU: EVGA 8800 GTS 640MB
Power: 620W Zero dba

Only running 1 Hard Drive and 1 DVD Drive. Everything else is CPU and GPU.
a b U Graphics card
December 6, 2008 12:27:53 AM

It could be the psu. Do you have an extra psu or one you can borrow? give it a shoot and see if it runs stable without reboot.
December 6, 2008 12:41:53 AM

I have an extra 480W, but how will that help me?
December 6, 2008 12:48:36 AM wont.
December 6, 2008 1:11:39 AM

err... what games do you want to paly on 2560x1600... i mean anything but crysis would probly be fine with two 8800GTS's..
December 6, 2008 12:24:59 PM

I am thinking your PSU is drawing to much power, so it is rebooting, you more then likely need a good 750W one with that card.
December 6, 2008 1:13:09 PM

Yea that is what I was thinking as well. Not sure why I was told my 620w would do the job or I would have ordered a new PSU at the time I got the card.

Got a Cooler Master 1100w on the way so hopefully that will do the trick.