crossfire on GTA V= 2x vram?

[justanoob]

I just started play GTA V and I have 2 r9 270x's that have 2 GB's of ram each. In GTA V however it shows I have 4 GB's and last time I checked CS/SLI doesn't combine vram( until dx 12 apparently). After playing for a bit(story mode) the game crashed and said i was low on memory. So is GTA V combining Vram or is it stealing RAM.

 

[andy_Man]

You only have an effective vram of 2gb. I would keep GTA V using under that.
It's probably trying to use too much memory and going to system memory. (This is bad, sys memory is slow compared to vram)

 

[photonboy]

1) Yes, effective 2GB.

2) Is it low on VIDEO or System memory? What was the exact error?

3) It's a new game so perhaps a glitch to be fixed? Google to see if others have same problem.

4) For now, try dropping anything using excessive video memory such as anti-aliasing. (i.e. go to 8xMSAA to 4xMSAA) and possibly drop the resolution to say 1600x900 if at 1920x1080. Again, just temporary.

 

[photonboy]

https://support.rockstargames.com/hc/communities/public/questions/203283328-GTA-V-PC-Memory-leak

As I suspected, it's a memory leak. New game.

I suspect that's a SYSTEM memory (i.e. DDR3) issue not video but either way you may want to hold off for a patch as it's probably a priority or spend more time looking for a solution which may not be there yet for your scenario.

*Paging file:
It MAY help to set your pagefile to be managed by Windows not capped by you. You can Google for how. This is still an issue needed to be patched as the Pagefile is a temporary buffer on physical drive (SSD or HDD) in case the main System Memory is filled up (similar to how video memory can buffer to system memory).

Using the Pagefile could stop the "low memory" problem. Or DELAY it, however it may also cause a lot of stutter due to slow access on the drive instead of System/Video memory.

**REBOOTING your computer and playing GTA5 for a limited time may delay significantly the time to run out of memory

 

[Pinhedd]

I just started play GTA V and I have 2 r9 270x's that have 2 GB's of ram each. In GTA V however it shows I have 4 GB's and last time I checked CS/SLI doesn't combine vram( until dx 12 apparently). After playing for a bit(story mode) the game crashed and said i was low on memory. So is GTA V combining Vram or is it stealing RAM.

The dedicated memory on each graphics card are independently addressable. If you have two GPUs with 2GiB of GDDR5 each, this will be managed as two separate blocks of 2GiB for a total of 4GiB.

However, with the way automated resource management is implemented in DirectX and WDDM, most memory is mirrored across all adapters when SLI or CrossfireX are used.

For the purposes of accounting, each adapter's memory is discrete. Each adapter will have a copy of each buffer, shader, etc... so enabling certain memory intensive graphical options will have twice the impact on a 2-way Crossfire/SLI configuration as it would on a single GPU configuration.

 

[justanoob]

would having more ram help in general. also tried playing again near my "max" of 4 GB's it was laggy but no crashes i also had less programs open( I made sure this time only steam was running)