Posted 01 February 2010 - 03:00 AM
with PCI express theres several options available, theres PCI_E 1x, 4x, 8x, and 16x. the number is how many lanes each slot has, the more lanes the more data can travel along them and the faster it goes (this is the simple version. Each one is a different length, however somewhat interchangeable. a expansion card that is PCI_E 1x will run on any PCI_E slot 1x and bigger, while a 4x card will run on anything 4x or bigger, but not anything smaller. now a PCI express 16 slot running at 4x means that the slot is the same size as a PCI_E 16 slot, so you can fit a video card in it, but it only runs at the speed of a 4x slot. So if your only running a single video card you do not want to use that slot. In crossfire however, you would use that slot, as the top card is the primary card it would still be doing most of the work, the bottom card is there to basically help the top one and its not necessary that it runs at the full 16x. now boards with both slots running at 16x will perform better though.
Primary system: Motherboard: ASUS M4A89GTD PRO/USB3, Processor: AMD Phenom II x4 945, Memory: 16 gigs of Patriot G2 DDR3 1600, Video: AMD Sapphire Nitro R9 380, Storage: 1 WD 500 gig HD, 1 Hitachi 500 gig HD, and Power supply: Coolermaster 750 watt, OS: Windows 10 64 bit.
Media Center: Motherboard: Gigabyte mp61p-S3, Processor: AMD Athlon 64 x2 6000+, Memory: 6 gigs Patriot DDR2 800, Video: Gigabyte GeForce GT730, Storage: 500 gig Hitachi, PSU: Seasonic M1211 620W full modular, OS: Windows 10.
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