You can see the difference in "highest playable settings" between a single card and SLI. With SLI you'll see higher minimum frame rates, and you should be able to move up the game image quality substantially (enabling a higher level of AA, post processing and PhysX). Not really aside from the vagaries of multi-GPU scaling and profiles. You can adjust the second card with EVGA Precision or MSI Afterburner to synchronize the core clocks ( the boost clocks on Kepler cards are independent under SLI so that area is immaterial) EVGA cards usually stick to the reference memory frequency (6008M effective) that your Giga card has. Any warranty claims are done by the subsequent owner under the Guest RMA procedure. EVGA might be a better bet since the 3 -year warranty is linked to the card and not the registered owner. Considering the potential problems and cost of a 4GB card over a 2GB, I'd just stick with the latter.Īnother Gigabyte might make the overall look more aesthetic maybe, but I'd look at pricing (I presume you're looking at second hand) and warranty. If the first card is 4GB then the second card is only transferring 2GB, and if the second card is 4GB then it can only transfer 2GB to the 2GB card. This is because the buffer from the second card in the SLI setup flips to the first card. The framebuffer is limited to the smaller of the two. Different framebuffers so long as the memory frequency is the same can be extremely problematic (more so since CoolBits is no longer an option). They can be from different manufacturers.
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