why the drop in performance and frame rate occure when uv texture in game engine?

hi every body, my qeustion is : why the drop in performance and frame rate occure when uv texture a plane in game engine?? ,

in details:
when I render the game (press P for embedded player or start a stand alone player) , while I make my plane textured with UV unwrap , the performance is so low and there is a drop in frame rate and high in rasterizer usage as explained in next picture


when I remove the uv unwrap of the plane, and make the plane without texture (by remove the picture which in uv/image editor while I am in Edit mode(press X) and then return to object mode , or while i select the plane and go to properties-> object data -> uv maps -> press (-)(remove uvmap) ) , i notice a high gain in performance and frame per second and low in rasterizer as showen in next picture


I also notice that when the camera look away from that uv textured plane , the rasterizer usage return low and the performance and frame rate return high (the drop in performance gone!) ,althought the plane is still uv textured

the question is why this break down in performance and frame rate happend??? and how if possiple we can avoid this ???

here is the blender file
uv texture in render game problem.blend (391 KB)

You need to pack textures before uploading the .blend file. Please try that and upload again :slight_smile:

The Rasterizer is at 31.9ms in your screenshot without UV textures, but when I run it on my PC with a dedicated gpu, it is 0.19ms. My immediate guess would be that your pc has a low-end (maybe onboard) gpu, therefore it cannot handle texture mapping. Can you play other games on your pc without lag? What are your system specifications? Try updating your drivers - might help.

here is the blender file
[ATTACH]262172[/ATTACH]

and here is my computer specific






i know it’s quit old , but it play other game good , like nebours from hell or PraetoriansDemo or Need For Speed Hot Pursuit 2 Demo …etc and also fifa2005 demo

Okay yeah you have a pretty outdated PC (2006 gpu), but if it can handle those demos, it should handle blender. Make a system restore point then try install these: http://support.amd.com/us/gpudownload/Pages/radeon-prer300-xp.aspx drivers… The default microsoft drivers currently installed might not have the latest openGL version available for your card.

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when in textured plane the drop in frame rate (248 ms 4fps !!) and high in rasterizer(237 ms) usage

when in non textured plane the high gain in performance and frame per second (43ms 23fps) and low in rasterizer(31ms)

Your screen says that your drivers are from Microsoft Corporation, what you need to be aware of is that Microsoft’s drivers by default will limit your OpenGL display ability to version 1.1 because their primary focus is support of DirectX.

What you need to do is go to ATI’s website and download the latest drivers that they have available for your card, once you do that, your performance should see a significant improvement.

Those were the latest drivers I could find for ATI 9250.

congratolation , the problem is resolved , it was in cause of that i didn’t setup the driver of my ati vedio card and the version of opengl was of version 1.1 of microsoft driver which is old and not good , now i setup the driver
(xp driver on vista windows by advanced select . inf file by my self method from device manager --> update driver of my vedio card)
thanks to @MrPutuLips for the good and right advices , it’s now the time to change the prefix of the object to (resolved)

congratolation , the problem is resolved , it was in cause of that i didn’t setup the driver of my ati vedio card and the version of opengl was of version 1.1 of microsoft driver which is old and not good , now i setup the driver
(xp driver on vista windows by advanced select . inf file by my self method from device manager --> update driver of my vedio card)
thanks to @MrPutuLips for the good and right advices , it’s now the time to change the prefix of the object to (resolved)