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DO 2 SLI card have to be identical?

post #1 of 13
Thread Starter 
thats about it....

DO 2 SLI card have to be identical?
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post #2 of 13
their gpu has to be identicle.. the manufacturer doesnt really matter

i think
post #3 of 13
no from what i read they can be differt brands but have to be the same type aka 7900gs needs a 7900gs to run sli.
post #4 of 13
Quote:
Originally Posted by eureka View Post
their gpu has to be identicle.. the manufacturer doesnt really matter

i think
Nvidia
The graphics cards 's need to match. like a 7800gt with a 7800gt , not a 7800gt with a 7900gt.
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post #5 of 13
Thread Starter 
so as long as the nubers match up? like i cant link a 7800 with a 8600 i guess but 2 8800s one from evga and another from bfg would be ok? what about the gt and gtx and all that?
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post #6 of 13
also needs to be the same. and they both need to run at identical clock speeds, AFAIK.
post #7 of 13
Quote:
Originally Posted by ChielScape View Post
also needs to be the same. and they both need to run at identical clock speeds, AFAIK.
Wouldn't it just default the clock on the OCed version? Then you could go and OC it yourself. Don't quote me on that, though.
post #8 of 13
Quote:
Originally Posted by s7raker View Post
so as long as the nubers match up? like i cant link a 7800 with a 8600 i guess but 2 8800s one from evga and another from bfg would be ok? what about the gt and gtx and all that?
As long as you pair for example a 320mb 8800GTS with another 320mb GTS and not an 8800GTS with a 8800GTX.
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post #9 of 13
Quote:
Originally Posted by ChielScape View Post
also needs to be the same. and they both need to run at identical clock speeds, AFAIK.
clocks automatically set to the first/master cards stock clocks and you can overclock from there
    
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post #10 of 13
The answers to most of your quesions are available on Nvidia's SLiZone homepage.

Quote:
Can I mix and match graphics cards?

In order to provide optimal symmetric scaling, SLI technology requires the NVIDIA GPUs 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 or later graphics drivers, NVIDIA GPUs sold by different manufacturers can be used together in an SLI configuration. 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 clocked 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), you 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.

Nvidia, 2007, SLiZone - FAQ
http://www.slizone.com/page/slizone_faq.html
Accessed: 09/07/2007
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