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the 320mb card at 1440x900 playing crysis will have at least 15-20 fps greater than a 640mb card at 1680x1050 playing crysis. and thats a big diff. the 320mb card comes in many oc'ed varieties, and the oced version of the 320mb card outperforms the stock 640mb card in 1600x1200 and sometimes even 1920x1200. go with the 320mb card at 1440x900, u wont be disappointed cuz all ur games will run smooth for around 1-2 years.
[QUOTE="suetracy"]and one more question, can you SLI an 8800gts 320mb with an 8800gts 640mb?SLI_Yoshi
lol, no you cant.
I think you can, but the 640 will only use 320 of the ram
uhh, no you cant... you need to have 2 of the exact same card. and ram doesnt stack up in sli so if u sli two 320mb cards, you wont get 640mbs. you'll still have 320mb of VRAM.SLI_Yoshi
yes you can
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. Instructions to enable this feature can be found
http://www.slizone.com/page/slizone_faq.html#c3
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