just an idea... u upgraded your equipment, did u also upgrade your psu? the r9 280x consumes alot of power; a 600W is recommended by AMD afaik. i heard 700-750 is perfekt. just a guess...
Funny thing since, I also have upgraded my computer. When I had Intel Core i7 950 at standard clockrate I could play normally and my GPU never reached usage above 85% in BF4. Probably because CPU was too slow for GPU. I mean GPU couldn't reach it's full potential probably. I had DX error only in the beta when my GPU reached above 90% because of the bugs in the code, I guess. But after they patched it, everything was fine. After I've changed my CPU into Core i5 4670K, my GPU is always reaching over 95% of usage while playing. Whether I play on low settings or high and even force through the config file my framerates down to even 40, my GPU is still used in 95% or more. I've checked it by using MSI Afterburner. Logs show that every other hardware was fine. CPU temp, CPU usage for all core is not getting above over 80%, GPU temp, GPU fan speed. Only GPU usage isn't normal. It shouldn't get so high because the game is on low settings and with forcing low fps, it doesn't require so much power from the GPU, I think. It happens in all new games that are using DX 11.1 probably. Why? Because I saw on the CoD forums while I was googling the solution for this problem,that CoD players are having the same problem. So it seems that it might be problem with DX 11.1 libraries?
