Hallo guys, I hope somebody can help me here. I am sorry for my bad English, but I have a problem with my new Club3D Radeon HD4870. My system: Windows XP Pro SP3 (clean installation) SP2 also tried Core™ 2 Quad Q6600 @3200Mzh Thermaltake Big Thyphoon GigaByte P35-DS4 OCZ 2 GB DDR2-800@1000?zh Kit (Reaper HPC, EPP, OCZ2RPR800EB2GK) Club3D Radeon HD4870 Creative X-Fi Xtreme Music Creative MegaWokrs THX 5.1 550 HD Maxtor DiamondMax 10 SATA= 250Gig HD Seagate Barracuda IDE=80Gig Cooler Master 550 WATT Real Power MiDi Tower Thermaltake Soprano (Retail, VB1000BWS, Window) Iiyama E2403WS-B1 (DVI to HDMI) In games card performs verry well. No problem! 3DMARK06 - 14900, CRYSIS good fps, COD3 good FPS! But in widows...:shadedshu When I move one window above the other one then my GPU come to 70%! Or just scrolling a webpage... also fast moving of windows.. Look at this screenshots, I get some strange effect: Looks like driver problem, but I tried all drivers! So, my GPU Activity each time when I move some window comes to 50+ percent! Why is that and how can I fix that? It's looks like GPU comes to 3D mode... but why in Windows? Should the CATALYST 8.7 fix that? Hope someone can help me here! Maybe bug in bios?