GPU Showing the Wrong Memory

[Aid4nTheNoob]

I have an OcUK Radeon HD 6850. It has 1024mb GDDR5.

Earlier today, I went on the Systems requirements Lab website to see if I could run a game, L.A Noire, and I was shocked to see that it was reporting my GPU to only have 328mb of RAM.

I opened up DXdiag and it is showing the same thing there.

I seem to be able to run games such as BF3, 60-80fps on medium and 45-60fps on High. That is no different to what is usually like.

I'm not really bothered about this if I'm still able to play my games with the same performance as usual, however, I would still like to fix it if it's possible.

Here is a screenshot of my dxdiag screen:

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http://imgur.com/yvm7K

 

[Space Monkey]

Just checked mine (GTX 580) and it says I have 4GB of ram, yet the card is only 1.5GB? My system has 16GB ram, so what its showing is anybodies guess?

 

[reflux]

This refers to something else, not your GPU memory.

Use GPU-Z to check GPU RAM.

 

[Orcvader]

Just ignore it. Other programs such as GPU-Z and MSI AfterBurner report the full memory. Dxdiag is reporting something else for the memory, but I've no idea what.

 

[Space Monkey]

Could it be reporting the pagefile size as 4GB seems very close to my current pagefile allocation?

 

[Orcvader]

Don't think so, mine reports as 2.7gb but that's not even close to my pagefile size...

Found the answer by googling. It's the virtual memory virtualization: http://www.sevenforums.com/tutorials/89278-video-memory-virtualization-brief-guide.html

EDIT: Scrap that link, this is the true reason: http://support.microsoft.com/kb/2026022/en-us?p=1

Seems Microsoft messed up .

 

[Aid4nTheNoob]

This refers to something else, not your GPU memory.

Use GPU-Z to check GPU RAM.

Thanks man, checked GPU-Z and it shows the correct memory.

 

[ltnmzh]

it's probably showing the memory that is mapped to main mem.