Witcher 3 Massive FPS drops when above 1080p
Hi all, me again
I am I pickle, I have been playing the Witcher 3 (with expansions and most recent patch) in 1080p with no problems for a while but when I upgraded to my new 4k monitor and I try to play in 4k resolution it works fine hovering around 40 fps but after I move forward a few meters in game it drops right down to 20 fps and is stuttering loads.
Temps are fine (GPU max 67c and my card throttles at 71c, CPU max 60c)
I attempted to drop the resolution down to 1440p and I get a constant 60fps but after running around for a few mins I get the drops when loading new areas and sometimes when cut scenes happen (same fps, down to 20)
Its worth noting that alt tabing out and back into the game bring the FPS back up to normal but the problem happens again after varying times, I am running in full screen.
I have looked at GPU-z and I notice that when the fps drops occur, my core clock goes down from 1050 to about 450 and this is only happening with this game (I play lots of games and never have a problem like this)
Things I have tried but problem still happening;
Wipe and reinstall AMD drivers with driver wiper
Attempted using non-beta latest version of drivers and hotfix
Complete reinstall of game and delete user config files
Using low, medium, high and ultra settings
Checked various performance guides and used everything you could think of
Wiped my PC of any overclocking hardware and tested using stock clocks/voltages
Disabling ULPS
Using Radeon pro to force constant clocks and flip queue size to 1
Setting high priority in task manager
Used a few different crossfire profiles reccomended from various sorces
Any thoughts?
System specs;
Intel i5 4690k @ 4.7GHz
Thermaltake Water 3.0 push/pull
8GB Crucial 1666MHz DDR3
MSI R9 295x2 8GB 1050/1550
MSI Z97 Gaming 3
XFX Pro 850w
LG 27MU67