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Quick question

Last response: in Graphics & Displays
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November 21, 2006 1:38:51 AM

Hey, guys. New to this forum and site. Realized if I need any hardware help this is the place to be. Anyways, I'm planning on purchasing a new graphic card for my pc. I know what most of the specs mean except for the "memory bandwidth". What's that and how does it differ from gpus with lower memory bandwidth?

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November 21, 2006 2:16:05 AM

The quickest answer: for current DX9 cards, 256bit is the way to go. Avoid 128bit interfaces. One exception would be the 7600GT. Higher clock and memory speeds, and architecture make up for the 128mb interface.
November 21, 2006 2:30:46 AM

Technically, memory bandwidth refers to the size of the "chunk" of data that can be written to or read from the memory per clock cycle.

So, the higher the better, all things being equal.
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November 23, 2006 1:27:12 AM

Thanks for the replies. Sorry, just a bit confused, mdalli you stated that "memory bandwidth refers to the size of the "chunk" of data that can be written to or read from the memory per clock cycle." By memory you mean the main system memory i.e RAM? Or the memory on the graphic card?
November 23, 2006 1:51:16 AM

I believe he was refering to the mem on the gpu.
November 28, 2006 3:38:54 PM

Quote:
Thanks for the replies. Sorry, just a bit confused, mdalli you stated that "memory bandwidth refers to the size of the "chunk" of data that can be written to or read from the memory per clock cycle." By memory you mean the main system memory i.e RAM? Or the memory on the graphic card?


If you have a dedicated graphics card (and if you care about things like "memory bandwidth", you should), it refers to how fast the GPU accesses the dedicated graphics memory on the graphics card. Don't worry, especially with PCIe x16, the roadblock is not between the graphics card and the system memory bus.

However, motherboard-integrated graphics solutions almost always share system memory.
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