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View Full Version : Whats the mathematical equation for determining memory bandwith?


ChrisRay
10-31-03, 06:53 PM
Does anyone have it handy?

ClyssaN
10-31-03, 08:31 PM
Example for the 9700 Pro

256bit bus * 310MHz * 2(DDR) / 8 = 19.8GB/s

ChrisRay
10-31-03, 08:38 PM
Originally posted by ClyssaN
Example for the 9700 Pro

256bit bus * 310MHz * 2(DDR) / 8 = 19.8GB/s

K. So my Geforce FX 5900SE which is 400/700 should be 22.4 Gigs of bandwith?

bkswaney
10-31-03, 10:03 PM
Originally posted by ChrisRay
K. So my Geforce FX 5900SE which is 400/700 should be 22.4 Gigs of bandwith?


Yep. :)

So my 5900u clocked at 950 is getting 30.

StealthHawk
10-31-03, 10:57 PM
Originally posted by ChrisRay
Does anyone have it handy?

Memory bus width / 8 * effective memory clock / 1000 = bandwidth(in GB/sec)