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gpu memory bus topic


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#1 synergy513

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Posted 04 November 2013 - 12:18 AM

i was just browsing the newegg catalogue checking out the new AMD offerings and noticed some details that i haven't seen discussed very much ~   the whole 128 / 192 / 256 / 384 / 512 bit memory bus width specs.  when is this memory bus width going to be an issue with some of the newer games emerging on the scene? i noticed a considerable price jump when the bus is wider.   theoretically ...would 256bit 1gb gddr3 be an advantage over 128bit 1gb gddr5 ? 


Moore's Law : 4d Graph in Progress


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#2 GreenGiant117

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Posted 04 November 2013 - 01:47 PM

You want the highest combination of the two, but this is weighted towards GDDR5, so for the two that you list you would want to go with the GDDR5 even though its 128 rather than 256.

 

its a complicated thing to wrap your head around but for the most part the new cards are GDDR5 with at least 256



#3 synergy513

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Posted 05 November 2013 - 02:10 PM

i found an interesting read, it clarifies the topic a little more

 

Memory Bandwidth: Memory bandwidth is the max amount of data (in units of MB per second) that can be transported over the external memory interface in one second. It is worked out by multiplying the card's interface (bus) width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.


Edited by synergy513, 05 November 2013 - 02:10 PM.

Moore's Law : 4d Graph in Progress





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