Sorry, I forgot you had a 7950. When I read 850MHz I wasn't thinking of stock a max 3D clock for the 7950 model, but the base non boosted clock for a 280X or 7970 GHz which is similar to its highest UVD clock (that when gets stuck, doesn't let the card reach 1000/1050MHz, the native boosted 3D clock). So your previous post was spot on. From my previous response, you can just look at the suggestion to set the lowest UVD clock as 300/150 instead of 500/1250, so even if it'll force the card to run most times at full 3D clocks during video play or browser peak loads (as 300/150 isn't enough), it'll at least idle at a lower speed if that's an advantage to you. In my testing on a 7970, the increased vram clocks of a stuck UVD mode caused it to draw an extra 30W vs 300/150. It's quite significant. In the past I've kept reporting my UVD bug findings on current drivers, but since then I've sold the 7970 to get a RX480, and the 7870 I kept on a secondary computer has died (baked it once to resurrect it, but it only lasted 3 months).