Memory Bus Width

[jshhndsd]

Hi,

Interested to know what memory bus width is?


Thanks in advance.

 

[Rookie_MIB]

Are talking about CPU->RAM? GPU->VRAM? For pretty much all x86/x64 CPU's, it's 64bits wide (applies to DDR-DDR4). For GPUs, it can vary from 64bits to 1024bits.

 

[jshhndsd]

Are talking about CPU->RAM? GPU->VRAM? For pretty much all x86/x64 CPU's, it's 64bits wide (applies to DDR-DDR4). For GPUs, it can vary from 64bits to 1024bits.

My apologies, I was referring to GPU's

 

[Rookie_MIB]

Well, they vary from GPU to GPU. Here's the list of Radeon GPUs, it has a chart of full specs, including bus width:

https://en.wikipedia.org/wiki/List_of_AMD_graphics_processing_units

And for Nvidia GPUs:

https://en.wikipedia.org/wiki/List_of_Nvidia_graphics_processing_units

Google is your friend... 😉

 

[Eximo]

amd64/x86-64 computers typically have a 128bit memory bus.

Bus width is a minor figure for GPUs. Bandwidth is more important. And even more important than that, how the data is processed from such a data pipeline.

AMD has cards with a 1024 bit bus, but they don't compete with the 256bit bus width of the latest Nvidia cards, excepting the Titan XP with is 384bit bus. AMD's latest cards also have a 256bit bus. We can probably assume AMD will release their Vega line with a 512bit bus. This typically what has happened every other generation or so.

Buses are more expensive the larger they are, and there is more chance for defective construction.