DirectX problem causing Games to lag

Hi all,

I am having some problems in playing a game Call of Duty 7 Black Ops.I had Nvidia Geforce 210 1 gb gpu earlier,although it's not a high end gpu for gaming yet I would play this same game at a resolution 800 x 600 or 1024 x 768 resolution without any lag.Few weeks ago I have upgraded my gpu to Nvidia Geforce Gt610 2gb and tried my hands on Cod 7 .In spite of having larger memory and better graphic engine I am experiencing lag while playing the same game Cod7. Game playing is stuttering and lagging,not running smoothly unlike before.I have also tried with lower resolution 800 x 600 but the result is same.

I then googled a bit and interestingly i found that it might be the Directx version causing this problem.My earlier gpu used to support Directx10 but this new one supports Directx11. I found that most of the games don't support Directx 11 and that's why lag might occur. I also found a list of games supporting Directx11 where most of the call of duty games are missing including the one I am telling about.The link is given below.You can also check it.

https://en.wikipedia.org/wiki/List_o...ctX_11_support

One more thing,when I was installing Cod 7 after installing my new gpu,the game installed successfully but it gave options to install Directx and Visual c++ 2005.I checked the boxes next to these two options but some error appeared in case of both.The message was something like "Error 740: The requested operation requires elevation " with the path to a folder called "Redist" containing both Directx and Visual c++ applications within the game's installation folder.I then went to that location and installed both of them manually and launched the game and then experienced a stuttering and lagging game play.

I don't exactly know what is really causing my problem.So I came here,asking for some help from you people,looking for some fix or tweaks if any.If you have some questions or any queries do ask me,I will try my best to answer them.

Thanks in Advance.

Thanks @Mellon Head for your reply,I will definitely give it another try as I just love COD games,just would like to ask you what do you exactly mean by reinstalling COD 7 using elevated privilege?I mean how to do it?Choosing "Run as Administrator" while performing re installation will do it or is there any thing more to do?Would you please explain the procedure?

Hi Mellon Head,i did what you said,I reinstalled the game with elevated privilege after uninstalling it.This time the previous error message didn't appear but while installing directx,towards the completion of it's installation process a different error message came saying "An internal error occurred.Please refer to DXError.log and DirectX.log in your Windows folder to determine problem".In case of Visual c++ installation it got successfully completed.
I went to the Windows folder but didn't find any file such as DXError.log but did find the DirectX.log . For your convenience I've attached the file.See if you could figure out something from it.

When I launched the game it was stuttering and lagging like before.

Hi Mellon Head, I run the DXDiag according to the way you suggested,but no such error showed up.Only the reporting window showed up.For your convenience I've attached it.

Hi Mellon Head,just one more thing I would like to inform you,I have Core 2 duo E7300 cpu which has 2 cores at 2.66 Ghz and 2.67 Ghz respectively.During booting before the appearence of windows logo it also used to show up like I mentioned but lately it is only showing one core at 1.60 Ghz (266 x 6). I checked at task manager's resource monitor option,under the cpu tab there both cpu's i.e. cpu 0 and cpu 1 are being shown,but when I ran CPU Z program it only showed one core at 1.60 Ghz.I am wandering if one of my cpu cores might have collapsed.I would like to know if it is at all possible for one of the two cores to collapse like that?

Could it be a possible reason behind the lag during gameplay? I just noticed the problem yesterday that's why I'm posting it today.

Hi Mellon Head,sorry for my late reply as i was ill for past few days, please don't mind for that.But now I've recovered a bit and feeling quite well.

No,I didn't change any power management settings or any such settings which could downclock the cpu. Although recently i formatted the c drive and fresh installed windows and after that entered into the bios and from there increased the cpu frequency multiplier from 6 to 10.Now my cpu is again running at 2.66 Ghz.Also reinstalled the game with elevated privilege but the lag is still there during the gameplay. I don't understand what could possibly be causing this problem.

One more thing within msconfig->Boot->Advanced options the Number of processors box is unchecked and it is showing 1.My cpu is Intel core 2 duo e7300 at 2.66ghz,2.67 ghz .Should it show 1 or 2 for 2 cores?