My Vista machine rates 2.6, but it rated 3.9 when I bought it. (and I have upgraded the ram). As such I take that rating system with a grain of salt. If adding RAM decreases the rating... I don't think that is what did it though... I think Vista SP1 sharply modified the ratings values.
The windows rating system was updated in March 2010 with Vista Sp2 to Windows 7 levels to account for the Intel i7 processor series.
Windows 7 can run on systems lower than a 5.5 rating, however the OS is severely gimped due to under performing hardware. the OS is designed to take advantage of newer hardware.. I find 5.5 to ge the "minimal" benchmark to shoot for for full functionality of the OS.
Also nothing less than 4GB DDR2 Ram running at low latency (maybe even boosted to 1.1v is you have good cooling).
Also running a 4GB memory stick dedicated to Ready Boost works wonders on older systems (this offloads most of the OS from system memory and allows your Ram to be free for programs).
a 6.0 rating (or 5.09 for standard SATA HDDs @7200 RPM with 32 MB cache) is a smooth machine and fair to decent for gaming. If you want a dynamite gaming machine you want to shoot for 6.5 or higher.. the rating system work good if you understand the value levels.
As for Vista vs Win 7, Win 7 blows the doors off Vista, however if you have decent hardware (5.5 rating on the new Windex scores), Vista ultimate x64 is pretty good (not great but better than XP except for the DirectX 8 and lower issues).. lower versions of Vista are stripped versions of Vista Ultimate and as such that broke certain components.
Windows 7 on the other hand improves memory management and works IMHO about 60% better than Vista Ultimate.. and lower versions are 10K times better since with Windows 7, they built it up instead of stripping down like with Vista.. so the core OS in Windows 7 is the Home Edition and the other stuff to improve the OS and boost the OS performance is added on to the core to make the Enterprise and Ultimate editions
Windex rating is the crux for performance.. 5.5 seems to be the breakpoint.. if you are running just an office machine doing mindless repetative tasks with low end 2D / 3D applications, then machines rated 2.0 to 5.5 is good to have. 5.5 to 7.0 is midrange system that is fair to good for gaming (high end), and system ratings 7.1 to 7.9 don't even worry about any applications thrown at it.. a 7.9 machine smokes.. Unfortunately I won't have one rating in the 7.* range until 2012 tax return.. I have to make this one last for another year.
Currently the best I have seen any machine reach is 7.4 fully maxed out, so the Windex leaves room for hardware to grow, at least for the next year or so.
Manitoba, sweet setup you have there.. nice on the RAM.. If you want the ram to hit the magic 7.9 mark.. go to DDR3.. the CPU to 7.9 go to an Intel i975 Extreme... and graphics to go to 7.9 (actually beyone the 7.9 rating cap) the new NVidia 580 GTX (or totally bust the 7.9 Windex rating with 2x 580GTX in SLI
) If you decide to upgrade your drives.. look for drives with 10K or faster RPM with 64MB cache or go with solid state Drives rated at 6Gbps transfer rate(the common version available).. I think 12Gbps transfer rate drives will be hitting the market soon.
If you want to get higher with lower end drives, then go for a Raid0 array and make sure your mainboard supports 6Gbps transfer rate (that will bring you to 6.5 with write protection enabled in Device Manager, 6.8 with write protection disabled) and the drives are sporting 32MB cache (given spin speed is 7200 RPM).
But your rig blows mine out of the water, no doubt about it.. I'm stuck at 5.9 with my HDD, but if I had my HDDs in RAID0 config, I would still only rate a 6.2 due to CPU and ram (or lack there of.. only 4GB instead of 8GB).
Is yours Cryo cool, Water cool or air cool with many fans? Good temps regardless.. Sweet. I like your rig... I'll take it when your done with it.
It has been killing me with my family finances for the last couple of years.. I really want to build a new rig.. this one is 3 years old.. I've lived my life building myself a new system every tax return with exception of the last 2 years (going to be 3 in Feb.. that is ancient in computer terms and I have to make it last until it turns 4).
Sigh....