11-10-2013, 10:25 PM
I've been having a weird issue when running 2 GPUs in crossfire, my VRAM usage skyrockets. Wondering if this is attributed to using the pixel clock patcher or CRU.
I am running a Overlord monitor OC'd to 120hz in conjunction with AMD Pixel Clock Patcher / CRU. AMD driver 13.11 b8 - I've tested drivers going back to WHQL 13.4 and they all seem to have same issue. 2 crossfire bridges connected (is that still required?)
When running identical GFX quality settings (1x 7970 vs 2x 7970 ) I have large variances in memory usage, with 2x 7970 using almost twice the VRAM. In demanding games this maxes out the 3GB buffer and I get a directx OUT OF MEMORY error and the game crashes.
For example, BF4 on 1 GPU @ ULTRA - NO MSAA = 1.9GB VRAM
2 GPU same settings = jumps to 3GB and game quickly crashes with error. This jump in VRAM usage is across the board; games like BF3/BF4 or benchmark tools like 3dMark11/Unigine Valley.
I searched the error and some said to enable page file, which I had at 1024mb, increased to 4096mb with same result. Also tested @60hz to reduce bandwidth but same issue.
I am running a Overlord monitor OC'd to 120hz in conjunction with AMD Pixel Clock Patcher / CRU. AMD driver 13.11 b8 - I've tested drivers going back to WHQL 13.4 and they all seem to have same issue. 2 crossfire bridges connected (is that still required?)
When running identical GFX quality settings (1x 7970 vs 2x 7970 ) I have large variances in memory usage, with 2x 7970 using almost twice the VRAM. In demanding games this maxes out the 3GB buffer and I get a directx OUT OF MEMORY error and the game crashes.
For example, BF4 on 1 GPU @ ULTRA - NO MSAA = 1.9GB VRAM
2 GPU same settings = jumps to 3GB and game quickly crashes with error. This jump in VRAM usage is across the board; games like BF3/BF4 or benchmark tools like 3dMark11/Unigine Valley.
I searched the error and some said to enable page file, which I had at 1024mb, increased to 4096mb with same result. Also tested @60hz to reduce bandwidth but same issue.