Will it cause problems installing DirectX 9.0C on Vista?

[9nines]

I am using Vista Home Premium 64.

I have a fairly new game (Warhammer Online) that is having stuttering issues, periodic frame-per-second drop etc. I have found various messages suggesting that Vista users install MicroSoft?s latest DirectX 9.0c and it will improve performance for this game.

Will installing DirectX9.0c cause problems for Vista and/or conflict with the DirectX10 that is already installed?

If I install Directx9.0c, will it cause problems for Directx10 games?

 

[dguy6789]

See if the people telling you this will help have actually done this themselves. If they are just making this suggestion up and have not tried it themselves(Which I believe is the case because if they did try it themselves, then you wouldn't have any doubts as to if it would cause problems or not), I don't recommend bothering with it at all, because DX10 and such is supposed to be backwards compatible just fine.

What are the specifications of your computer?

 

[Mem]

Originally posted by: 9nines
I am using Vista Home Premium 64.

I have a fairly new game (Warhammer Online) that is having stuttering issues, periodic frame-per-second drop etc. I have found various messages suggesting that Vista users install MicroSoft?s latest DirectX 9.0c and it will improve performance for this game.

Will installing DirectX9.0c cause problems for Vista and/or conflict with the DirectX10 that is already installed?

If I install Directx9.0c, will it cause problems for Directx10 games?

There will be no problems,I have updated both my Vista PCs about 10 times now with DX9.0c,you'll still have DX10.


Microsoft even list Vista ,see below.

System Requirements

* Supported Operating Systems: Windows Server 2003; Windows Server 2003 R2 (32-Bit x86); Windows Server 2003 R2 Datacenter Edition (32-Bit x86); Windows Server 2003 R2 Datacenter x64 Edition; Windows Server 2003 R2 Enterprise Edition (32-Bit x86); Windows Server 2003 R2 Enterprise x64 Edition; Windows Server 2003 R2 Standard Edition (32-bit x86); Windows Server 2003 R2 Standard x64 Edition ; Windows Server 2003 R2 x64 editions; Windows Server 2003 Service Pack 1; Windows Server 2003 Service Pack 2; Windows Server 2003 Service Pack 2 x64 Edition; Windows Server 2003 x64 editions; Windows Server 2003, Datacenter Edition (32-bit x86); Windows Server 2003, Datacenter x64 Edition; Windows Server 2003, Enterprise Edition (32-bit x86); Windows Server 2003, Enterprise x64 Edition; Windows Server 2003, Standard Edition (32-bit x86); Windows Server 2003, Standard x64 Edition; Windows Server 2003, Web Edition; Windows Server 2008; Windows Server 2008 Datacenter; Windows Server 2008 Datacenter without Hyper-V; Windows Server 2008 Enterprise; Windows Server 2008 Enterprise without Hyper-V; Windows Server 2008 Standard; Windows Server 2008 Standard without Hyper-V; Windows Small Business Server 2003 ; Windows Small Business Server 2008 Premium; Windows Small Business Server 2008 Standard ; Windows Vista; Windows Vista 64-bit Editions Service Pack 1; Windows Vista Business; Windows Vista Business 64-bit edition; Windows Vista Business N; Windows Vista Enterprise; Windows Vista Enterprise 64-bit edition; Windows Vista Home Basic; Windows Vista Home Basic 64-bit edition; Windows Vista Home Basic N; Windows Vista Home Premium; Windows Vista Home Premium 64-bit edition; Windows Vista Service Pack 1; Windows Vista Starter; Windows Vista Starter N; Windows Vista Ultimate; Windows Vista Ultimate 64-bit edition; Windows Web Server 2008; Windows XP; Windows XP 64-bit; Windows XP Home Edition ; Windows XP Home Edition N; Windows XP Media Center Edition; Windows XP Media Center Edition 2005 Update Rollup 2; Windows XP Professional Edition ; Windows XP Professional N; Windows XP Professional x64 Edition ; Windows XP Service Pack 1; Windows XP Service Pack 2; Windows XP Service Pack 3; Windows XP Starter Edition; Windows XP Tablet PC Edition

Link.


Warhammer Online has issues period,their patch updates seem to improve performance etc... ,not played it for awhile so can't say how good WAR is now.

 

[9nines]

Originally posted by: dguy6789
See if the people telling you this will help have actually done this themselves. If they are just making this suggestion up and have not tried it themselves(Which I believe is the case because if they did try it themselves, then you wouldn't have any doubts as to if it would cause problems or not), I don't recommend bothering with it at all, because DX10 and such is supposed to be backwards compatible just fine.

What are the specifications of your computer?

The suggestions have been in sets of general FAQs for the game. For example, the #2 in on this page: http://www.warhammeralliance.c...showthread.php?t=57345


The game hits 60 FPS (I V-snyc) then plays around 40-60 then all of a sudden in same area, with nothing changing, it goes down to 15-20 then sometimes to single digits. One time I could not even move and I had to kill the game exe through task manager.

The game did not do this the first two months but has over the last few weeks. I uninstalled video drivers and reinstalled newest ones and it still does this.

My system is fairly high-end, which is why I am puzzled over performance in this game:

E8400 CPU (stock speed)
4GB of Mushkin DDR2 in 2 simms running at auto-speed settings (not overclocking)
Vista Home Premium 64
EVGA GTX280 (even if I overclock it 20%, it makes no difference in frames-per-second)
Corsair 750 watt power supply.
WD6400aaks hard drive in two partitions
Small Raptor WD hard drive where I have some back-up files and my page file.

 

[lxskllr]

Go ahead and give it a try. I had to install it because it was *required* for a game(I don't remember which). I've had no ill effects, and I was able to play the game I wanted to play.

 

[blackangst1]

Ive installed 9c on top of 10 on my system for Vanguard. It works just fine.

 

[9nines]

Thanks for confirming. From more reading, I think the issue is that Vista is using an older DX9 as part of Vista and Vista does not update its files as it would on an XP system, so by doing a new installation, you get the latest pieces of DX9.0c updated.

 

[sswingle]

Yup, I have several games that I had to install 9c, but Crysis is still able to use DX10.

In fact, if I go to the Vista games menu and right click on Crysis, I get the option to Run DX10 and Run DX9.

 

[zerocool84]

Originally posted by: sswingle
Yup, I have several games that I had to install 9c, but Crysis is still able to use DX10.

In fact, if I go to the Vista games menu and right click on Crysis, I get the option to Run DX10 and Run DX9.

Yep I put in DX9 and DX10 works fine as well.