And WTF is this? 640 mb video card? 15 replies

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Revenge Advanced Member

Shizzle my nizzle

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28th July 2004

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#11 15 years ago
Rookie_42Of course, you could always SLI two 7800GTX 512mb cards to give you 1gb in total, but that's just overkill at the moment.

Heh, anything from GeForce starting with '7' is overkill on its own at the moment too ;)

As Rookie said, most games don't even need 256Mb. The main thing holding back graphical power is the processor, not the memory - it's quite easy to add more memory modules to a card and double the price. It's not so easy to improve the onboard processor performance and still keep the heat in double figures (using celsius for the pessimistics).




Agentlaidlaw

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21st February 2005

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#12 15 years ago

Wait till UT2007 comes out. Then your gonna be wishing you had a 512MB video card or SLI and a dual core processor. And yes UT2007 will be made for dual cores and SLI.




C38368

...burning angel wings to dust

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14th February 2004

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#13 15 years ago
AgentlaidlawWait till UT2007 comes out. Then your gonna be wishing you had a 512MB video card or SLI and a dual core processor.

Except that there's still that one niggling little issue about graphics cores not being able to keep 256MB of textures in the buffer.




[21Pz]Stauffenberg

the Wishmaster

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#14 15 years ago
Rookie_42...Of course it does. That's the whole idea of SLI, patching together two GPUs (Note that a GPU consists of a VPU (Visual Processing Unit), a memory interface, and the video RAM itself) in order to split the workload between the two cards.

It does not really, two SLI cards running a game always have(!!!) to have quite alot files on both memories, meaning they occupy this space on both, and its not shared at all.

SLI doesnt put two cards and vpus to render one picture, but it splits the picture and has the top half rendered by one and the bottom half by the other. So its not as you say, patched together.




Rookie Advanced Member

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#15 15 years ago

Not necessarily. SLI uses two methods to render frames - AFR (Alternate Frame Rendering) and SFR (Split Frame Rendering), depending on driver settings. SFR essentially breaks down the rendered image and sends the data to both VPUs, allowing them to simultaneously render the image. AFR is a process whereby one card renders the first frame in a scene, the second card renders the next one, and so on and so forth.

As for the memory, you are correct in as much as neither GPU can access the memory bus of the other, however in effect twice as much texture data can be held by the SLI system at any one time (especially when the GPUs render using SFR), which effectively doubles the Video RAM capacity of the computer.




[21Pz]Stauffenberg

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#16 15 years ago

Rookie_42Not necessarily. SLI uses two methods to render frames - AFR (Alternate Frame Rendering) and SFR (Split Frame Rendering), depending on driver settings. SFR essentially breaks down the rendered image and sends the data to both VPUs, allowing them to simultaneously render the image. AFR is a process whereby one card renders the first frame in a scene, the second card renders the next one, and so on and so forth.

As for the memory, you are correct in as much as neither GPU can access the memory bus of the other, however in effect twice as much texture data can be held by the SLI system at any one time (especially when the GPUs render using SFR), which effectively doubles the Video RAM capacity of the computer.

Oh okay, now i know more, thx :p




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