The max total RAM address space for a 32bit OS is 4 gigabyte. If your graphic card has 1G of RAM, your maximum memory is going to at most be 3GB, because the 32bit OS has to use 1GB of that address space to address your video memory. It’ll actually be lower than the 3GB because there are other hardware resources that need address space, too. So, saying there is no reason to go with a 64bit OS is BS to be honest. The real fact is that there is no reason to go with a 32bit OS on a new build PC.
Simple fact, if you have a new 64bit CPU and are getting a new OS then it is much wiser to go with a 64bit OS to get the full benefit from it. I see many people who purchase a new 32bit version of Vista or Windows 7 and stick 4GB of RAM and a 1GB high end graphics card. Before they have enven built their new PC they have crippled it by practically throwing away 1.4GB tp 1.5GB of usable RAM.
Using some simple mathematics with RoF on a 32bit OS with a 1GB Graphics card and 4G RAM.
4GB RAM
- 1GB RAM for GPU (effectively eliminating 1GB of system RAM)
- 1.7GB for RoF
- approx 0.3 - 0.5GB for other hardware addressing
That leaves a total of 0.8 - 1.0GB RAM for your OS and other apps that are running in the background. I can assure you that if RoF was running on such a system your free RAM would be measured in the low Megabytes, and that the paging file would be used a lot.
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"If the world didn't suck, we would all fall off"