Why don't my DX9 games run on my DX10 system??

Question

I cant play any of my old DX9 games anymore since i got my new system. It simply does not want to work. When i installed crysis, it obviously worked without any hesitation. I really don't think DX9 games will not work on DX10 systems so there has to be a problem.

My system specs:

- Windows vista ultimate 32-bit

- 2 8800gts 512s in SLI

- EVGA 780i mobo

- 4gb ram ddr2 1200mhz

- Intel quad core Q6600

I appreciate the help.

Answer 1

The problem is, that Vista's DirectX 10 is not downward compatible with DirectX9.

You need to install DirectX9 yourself first, and then your DX9 games will work flawlessly.

Just find a DirectX 9 game, and on the CD should be a folder called "DirectX" or DX Redist" or something like this.

Install DX9 from that or download it from the website below.

By the way: The guy who sold you this PC should be kicked in the butt. You have 4GB RAM in your PC, but a 32-bit Vista. So a whole Gigabyte of RAM is not usable by this system.

In order to use all 4GB of RAM you will need the 64bit version of Vista.

Answer 2

You need to be a bit more specific about the "don't work" part. What exactly happens? Does your pc squirt flames when you start dx9 games? Do you get a certain error?