AMD Phenom II X4 955 / ATI Radeon 4890 Crash to desktop / low FPS

HI!

First: Iam using an AMD Phenom II X4 955 / ATI Radeon 4890 graphics card. I run Armed-Assault 1.16 Beta and the ATI Catalyst 9.5(may 2009) (on Windows Vista 64). CPU/GPU not overclocked, fresh BIOS (may 2009)update.

The Problem occurs in Window and Fullscreen mode.

Games like Day of Defeat: Source, Anno1701, Lockon F.C., 3DMark Vantage or Farcry2 all run fine. But ArmA does not.

Ive got very high FPS and the game runs fine but after 10-20 secs playing (most times on Sahrani) the FPS decrease for 1-2 seconds. It seems like something stops the game for a very short time, then it runs fine again for a short time. (this happens again and again)

Once the game started these FPS-decreases it crashes to the desktop sooner or later. I do not get any error messages. The Games closes instant.

Iam sick of Armed-Assault problems so far, but I hope someone may help me or anyone having the same problems with the ATI 4890 may find help in this thread. I hope it will be fixed in Beta-Assault II.

My hardware:

- AMD Phenom II X4 955 4x3.20GHz

- Gigabyte GA-MA790XT-UD4P 790X

- G1024P Club3D ATI Radeon HD4890 1024MB video card

- 4096MB Corsair PC3-10666 CL9 Kit (DDR3 1333+)

- 680W SuperFlower Atlas Design Modular

- (temps never higher than 55°Celsius)

setting every detail on very high works for me right now (texture settings on very high too)

I feel for you. but ARMA2 soon here. Should get kick ass performance with your hardware. Much better than ArmA1 wich is not as optimized. ;)