Hi Guys Please Help me I really dont understand eventhough i belive i had high spec computer but still it lags while playing fsx. while i kept same setting in directx 10 it is very smooth no problem but when i untick preview directx10 mode and run fsx then there is lagging. i really dunno why please get me rid of this problem. if want to know my computer spec here it follows: Motherboard: CPU Type 4x , 4033 MHz Motherboard Name Unknown Motherboard Chipset Unknown System Memory 8181 MB BIOS Type Unknown Display: Video Adapter ATI Radeon HD 5800 Series Video Adapter ATI Radeon HD 5800 Series Video Adapter ATI Radeon HD 5800 Series Monitor SyncMaster T240HD/T240MD(Digital) [NoDB] (H1AK500000) CPU Properties: CPU Type 4x CPUID CPU Name Intel® Core i7 CPU 975 @ 3.33GHz CPUID Revision 000106A5h CPU Speed: CPU Clock 4025.23 MHz (original: 3333 MHz, overclock: 21%) CPU Cache: L1 Data Cache 32 KB L2 Cache 256 KB (On-Die, ATC, Full-Speed) --------[ CPU ]--------------------------------------------------------------------------------------------------------- CPU Properties: CPU Type 4x , 4033 MHz Instruction Set x86, x86-64, MMX, SSE, SSE2, SSE3 Original Clock 3333 MHz L1 Data Cache 32 KB L2 Cache 256 KB (On-Die, ATC, Full-Speed) Multi CPU: CPU #0 Intel® Core i7 CPU 975 @ 3.33GHz, 4025 MHz CPU #1 Intel® Core i7 CPU 975 @ 3.33GHz, 4025 MHz CPU #2 Intel® Core i7 CPU 975 @ 3.33GHz, 4025 MHz CPU #3 Intel® Core i7 CPU 975 @ 3.33GHz, 4025 MHz CPU #4 Intel® Core i7 CPU 975 @ 3.33GHz, 4025 MHz CPU #5 Intel® Core i7 CPU 975 @ 3.33GHz, 4025 MHz CPU #6 Intel® Core i7 CPU 975 @ 3.33GHz, 4025 MHz CPU #7 Intel® Core i7 CPU 975 @ 3.33GHz, 4025 MHz --------[ Memory ]------------------------------------------------------------------------------------------------------ Physical Memory: Total 8181 MB Used 1586 MB Free 6594 MB Utilization 19 % Swap Space: Total 16579 MB Used 1687 MB Free 14892 MB Utilization 10 % Virtual Memory: Total 24761 MB Used 3274 MB Free 21487 MB Utilization 13 % Physical Address Extension (PAE): Supported by Operating System Yes Supported by CPU Yes Active Yes Please Help me : Thanks Bikash

Even with that computer you will get performance problems if you max out all display settings in FSX.What bothers me is the 8GB system memory. What motherboard do you have? With an i7 975 you should normally use tripple channel RAM, that is three memory sticks (6GB) or six sticks (12GB). 8GB???Did you OC the system your self? Could you post pictures from CPU-Z. One picture for each of the tabs CPU, Mainboard and Memory.Here is a link to a good tuning guide written by Nick Needham: http://www.simforums.com/forums/forum_posts.asp?TID=29041

Ok here it goes .. plz refer to attachment.

Your system is most likely clocking down. CPU automatically adjusts to load conditions. While in FSX it should be a it's max mhz and then lets say you alt-tab out and check CPU-Z if will be clocked down because FSX has stopped and you are in 2D desktop view. Run FSX in widowed mode while having cpu-z running and your mhz should be back up to 3.33 if not o/c'd.

Strange that your first post with system information states that you have 8GB system memory. CPU-Z says 12GB, which is correct.

Strange that your first post with system information states that you have 8GB system memory. CPU-Z says 12GB, which is correct.

i am also wondering . as physically i see my memory there are 6 pcs x 2 GB = 12GB but dunno why but in system properties it shows 8 GB i really dont understand . i talk to my computer technicall support team they told me that rest is used by graphics card . i really dont understand .. is that possible.

This has happended to me, i fixed this by downloading FSX service pack 1 + 2 it gets rid of the laggyou can get SP1 here: http://www.microsoft.com/downloads/details...;displaylang=enand SP2 here: http://www.microsoft.com/downloads/details...32-5a41a3e27ff0Hope this helps