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What card for sli

post #1 of 21
Thread Starter 
hello guys i need help finid a card to go sli setup.

i have an XFX 7800GTX xxx 512

now i want another card which is going to work well with this one in sli mode.

the XFX 512 is out of stock everyware, so is there another solution


any help would be great.

i live in the uk.
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post #2 of 21
you have to get the EXACT same card for sli to work, it has to be another xfx... whatever the card you have now is, if you get something else it is going to tell you that your system is not compatible with sli, I know this because i tried to mix and match cards and i ended up having to get the exact same card
post #3 of 21
Thread Starter 
i have found these alternatives but not sure if they would work well because of how much difference the xfx has in memory speed and core frequency etc.

http://www.ebuyer.com/customer/produ...uct_uid=101752

http://www.ebuyer.com/customer/produ...uct_uid=105498
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post #4 of 21
Quote:
Originally Posted by bangelta
hello guys i need help finid a card to go sli setup.

i have an XFX 7800GTX xxx 512

now i want another card which is going to work well with this one in sli mode.

the XFX 512 is out of stock everyware, so is there another solution


any help would be great.

i live in the uk.
With the updates to SLI you can now mix and match cards(same series 6800,7800,7900,).

Both will have to be a 7800 with 512 memory for your setup so you can look to other makers for cards in stock..........I would also look for one with similar clock speeds.
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post #5 of 21
Thread Starter 
Quote:
Originally Posted by noshibby
you have to get the EXACT same card for sli to work, it has to be another xfx... whatever the card you have now is, if you get something else it is going to tell you that your system is not compatible with sli
right i didnt know that. thanks for the information.

guess i will have to wait till there back in stock.


do you think i should go with 2 XFX 7800 gtx's or get one 7900gtx 512

i have looked at the 7900 and it doesnt seem much of an improvement from my card
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post #6 of 21
because you have a 7800 i would go for a second 7800 because having the two cards will almost double 1 7900
post #7 of 21
Thread Starter 
Quote:
Originally Posted by ItsLasher
With the updates to SLI you can now mix and match cards(same series 6800,7800,7900,).

Both will have to be a 7800 with 512 memory for your setup so you can look to other makers for cards in stock..........I would also look for one with similar clock speeds.

well it looks like im gonna have to get another XFX7800 gtx to match the speeds then.

well hopefully they will start coming down in price.

any one got any uk links where i can get one

cheers
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post #8 of 21
Quote:
Originally Posted by bangelta
hello guys i need help finid a card to go sli setup.

i have an XFX 7800GTX xxx 512

now i want another card which is going to work well with this one in sli mode.

the XFX 512 is out of stock everyware, so is there another solution


any help would be great.

i live in the uk.
Any other 7800GTX from other companies will work
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post #9 of 21
Quote:
Originally Posted by bentrinh
Any other 7800GTX from other companies will work
no it wont between the different companies the card design and clock speeds differ so, windows will tell you that they are not compatible for sli
post #10 of 21
From Nvidia's web site the SLIzone

Can I mix and match graphics cards?

In order to provide optimal symmetric scaling, SLI Technology requires the NVIDIA GPU to match. For example, a GeForce 7800 GTX must be paired with another GeForce 7800 GTX. Likewise, a GeForce 6600 GT must be paired with another GeForce 6600 GT. However, using the latest Release 80 Graphics Drivers, NVIDIA GPUs sold by different manufacturers can be used together in SLI Mode. For example, a GeForce 7800 GT from vendor ABC can be matched with a GeForce 7800 GT from vendor XYZ. Can I mix and match graphics cards is one of them is Overclocked by the Manufacturer?
Yes. A GeForce 7800 GTX that is overclocked (for example BFG GeForce 7800 GTX OC) can be mixed with a standard clock GeForce 7800 GTX.
Can I mix and match graphics cards with different sizes of memory?
While it is not recommended, NVIDIA does offer this flexibility using Coolbits. When purchasing a second graphics card, you should try to match the memory size so that you are ensured full value and performance from your purchase. For example, if your first card is a GeForce 6600 GT with 128MB of memory, you should purchase a second GeForce 6600 GT with 128MB of memory. However, using Coolbits (value set to 18), customers can force both of the cards to use the lower of the two memory sizes and operate together in SLI Mode. When dissimilar memory sizes are enabled to work together using Coolbits, the effective memory size for each card becomes the smaller of the two memory sizes. Instructions to enable this feature can be found here.
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