Zanthor,

I agree with your question and there is little available serious testing out there (if any) for us multi-boxing on a single PC with 2 wide-screen monitors.

I run a Quad Core 6600 2.4ghz, bios O/C to 3.0ghz, with 4 Go ram under Vista, with GFX 512mo (3870 or 8800 GT).

What I've found, and this is no bullet-proof testing so take it as such, is that I never max out on QuadCore nor the 4Go (actually 3.5go under Vista) : I barely ever reach 50% of max CPU power and 65% of MB ram.
In other words, I don't feel like a bottleneck there.

Using Riva Tuner, I found that my 3870 is running at 50% of its GPU usage on average, so no obvious bottleneck from the GPU raw power either.

But ONE thing I haven't been able to look into yet is the load on the GPU Ram (ie. the 512mo) and I'd love to investigate that when I have the time.

In summary, while Mbxing 5 clients on a single PC with 2 wide-screens 1680*1050 monitors under Vista :
- Quad Core 6600 : 50% usage
- 3.5Go Ram : 65% usage
- GFX GPU : 50% usage
- GFX Ram : no idea

My gut feeling tells me there might be something about GFX Ram usage for us MBoxers on single PC.

/salute

PS : any link for a GFX Ram usage applet most welcome.