Running a 64bit program on a 32bit os

MrSpock2002 · Sep 5, 2007, 09:01 PM

Is that possable?

I only ask because Unreal 3 is coming out in November. I'll be buying it. But it's coming out with both 32bit and 64bit versions. The 64bit version will have better textures.

I do not want to buy a 32 bit version for my current XP machine then have to re buy a 64 bit version when I upgrade to my new machine.. Though I'm thinking that will be the case anyways..

I know 32 bit programs can run for the most part fine on a 64bit os.. But never heard of it the other way around.

Please advise

**ChaosMinionX** · Sep 5, 2007, 09:05 PM

Yes. 64bit runs both 32 and 64bit programs.

The only problem you run into is when a program needs a 64bit driver, and if it only has 32bit it wont work. As well with Vistax64 if the driver isnt digitally signed, it can be a pain in the ass.

Ignore this

PandaZ3 · Sep 5, 2007, 11:24 PM

I think you misread Mr. Spock's post

I don't think it will work, I think the 64 bit program will only work if all the drivers are for 64 bit and that won't be the case with a 32 bit OS.... but you knew that didn't you!

It makes me happy as I have XP64 on one macine and Vista HP 64 on this one and my Crossfire rig ...is it going to be DX10? .... I'd be sucking pondwater there

**ChaosMinionX** · Sep 5, 2007, 11:28 PM

Yep I read it wrong, too many numbers lol....

No you cannot run a 64bit program on a 32bit OS.