GTX 970 Performance Problem/Allocation bug
Seems a lot of Nvidia 970 customers have been lied to or misled, and should be reimbursed imo. Myself when I buy something that says 4GB dedicated Vram I expect to get 4GB of useable Vram without any sudden performance drops when accessing Vram past 3.5GB...
http://www.pcper.com/news/Graphics-Cards/NVIDIA-Responds-GTX-970-35GB-Memory-Issue
http://www.lazygamer.net/general-news/nvidias-gtx970-has-a-rather-serious-memory-allocation-bug/
"Over the past couple of weeks users of GeForce GTX 970 cards have noticed and started researching a problem with memory allocation in memory-heavy gaming. Essentially, gamers noticed that the GTX 970 with its 4GB of system memory was only ever accessing 3.5GB of that memory. When it did attempt to access the final 500MB of memory, performance seemed to drop dramatically. What started as simply a forum discussion blew up into news that was being reported at tech and gaming sites across the web."
"NVidia’s GTX 970 is the current price-to-performance darling, offering incredible visual for incredible value. It seems, however, that it’s harbouring a dark secret. It’s a 4GB card, but it looks like a significant chunk of that VRAM doesn’t work.
According to a number of rather angry people on Reddit, Overlock and the Guru3D forums who’ve noticed their shiny, powerful GTX 970’s come to a screeching halt when maxing out their cards. Clever people, using VRAM benchmarking software, have discovered that when the last 500`700MB of VRAM gets accessed, memory performance drops significantly. Some users have even found that their cards go belly up when hitting 3GB."
