I was going to wait for PCIe 3 cards. From what I have seen most people say they would not wait. I see people saying that most cards can't even max out the bandwidth of PCIe 2 slot. How do you figure the bandwidth of a video card. All I see on the product pages is Core Clock, Effective Memory Clock, etc...
inzone
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- Mar 12, 2011
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The memory interface , 256 bit , 320 bit , 384 bit. The type of ram , GDDR5. The Effective memory clock xxxxmhz. These are the determining factors in calculating the bandwidth of any video card. Since most all newer cards have GDDR5 ram , the memory interface and the clock speed are the two things that you want to look at without actually doing the calculation to get a ball park idea.
A card with an interface of 384 bit and a clock of 4050mhz is going to have a bandwidth higher than a card with an interface of 320 and a clock of 3902mhz.
(GTX 580 vs. GTX 570)
A card with an interface of 384 bit and a clock of 4050mhz is going to have a bandwidth higher than a card with an interface of 320 and a clock of 3902mhz.
(GTX 580 vs. GTX 570)
I fount this Effective Speed (MHz) x Memory Bus width (Bits) = Bandwidth (Mbps). I looked at this http://www.newegg.com/Product/Product.aspx?Item=N82E16814150552 .
Using that formula that would be 1250MHz x 256 = 320000 Mbps. Which is 40GBps.
40GBps is way more than PCIe 2 or PCIe 3 can handle. Is this right?
Using that formula that would be 1250MHz x 256 = 320000 Mbps. Which is 40GBps.
40GBps is way more than PCIe 2 or PCIe 3 can handle. Is this right?
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