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What does "dedicated" video RAM mean?


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#1 Grand Maester

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Posted 09 December 2008 - 21:55

I've been trying to figure out what manufacturers mean when they say that a gpu has so much "dedicated video memory" (RAM). My impression is that it means that the RAM in question is separate from the main system RAM (i.e. the GPU doesn't share it's RAM with the rest of the system), which is what I am looking for. This impression is based on the fact that I've only seen that term used when talking about systems with actual GPUs (rather than integrated graphics), and that they are usually accompanied by a larger number referred to as something like "maximum available memory" (which I take to mean the combined total of the dedicated memory and additional memory shared with the rest of the system). Can someone confirm this for me?


#2 Ci7

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Posted 09 December 2008 - 21:59

yea .

dedicated ram as in rams that the graphic card has exclusive access to all the times and they are onboard(in the card)

#3 OP Grand Maester

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Posted 09 December 2008 - 22:05

yea . dedicated ram as in rams that the graphic card has exclusive access to all the times and they are onboard(in the card)


Thanks! I was pretty sure that was the case but after an hour of looking I hadn't found anything to back it up and I figured one of my fellow neowinians could probably tell me quicker than I was going to find it.

#4 +Nik L

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Posted 09 December 2008 - 22:05

OK, so laptops on the lower end "lend" system RAM to the graphics chip. So a 2gig laptop with 512mb graphics memory, will only have 1.5gig once the GPU borrows some.

When a laptop has a dedicated graphics "card", it usually has it's own RAM and so none is being taken from the system.

#5 Ci7

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Posted 09 December 2008 - 22:14

OK, so laptops on the lower end "lend" system RAM to the graphics chip. So a 2gig laptop with 512mb graphics memory, will only have 1.5gig once the GPU borrows some.

When a laptop has a dedicated graphics "card", it usually has it's own RAM and so none is being taken from the system.


exactly

#6 fixxxer2014

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Posted 09 December 2008 - 22:16

OK, so laptops on the lower end "lend" system RAM to the graphics chip. So a 2gig laptop with 512mb graphics memory, will only have 1.5gig once the GPU borrows some.

When a laptop has a dedicated graphics "card", it usually has it's own RAM and so none is being taken from the system.



pretty much, my laptop does this with the nvidia gpu.



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