I am thinking of upgrading form HD4890 to HD5850 but as always I wonder if I will see any improvement in FSX.Would welcome your thoughts on this matter.My system is made up of:Intel Core 2 Duo E8400 Socket 775 LGA @ 3.00GHz. Overclocked to 3.60.Gigabyte EP45_UD3LR motherboard with Award F5 bios. 45nm optimized.4GHz Kingstone Hyper DDR2. Sapphire Radeon HD4890 1GHz.Corsair TX650 power supply.Thermaltake ISGC-300 air cooler.Windows 7 64bit.

I am thinking of upgrading form HD4890 to HD5850 but as always I wonder if I will see any improvement in FSX.Would welcome your thoughts on this matter.

While you are nowhere near maxing out the fillrate on the 4890, you may see better performance in heavy clouds with the 5850. Also if you are running a high resolution e.g. 1920 x 1080 you may see a modest bump in framerates. KJ

While you are nowhere near maxing out the fillrate on the 4890, you may see better performance in heavy clouds with the 5850. Also if you are running a high resolution e.g. 1920 x 1080 you may see a modest bump in framerates. KJ

Thanks for that. I run @ 1900 X 1200. I notice on some forums they are saying that these new 5xxx cards are much better for running Flight sims.I may save myself A$425. Most of the time I Overclock to 4.09GHz with good results except @ Orbx's Ymml where things get very slow.