Re: 4870 X2 performance
Every processor bottlenecks in 06, especially at the low default resolution of 1280x1024, it's probably the worst benchmark in existance behind SuperPi.
Vantage is a definite improvement, especially with the performance/extreme presets, and as you have Vista 64, you should definitely give it a try.
There has been nothing conclusive as to whether the PCI-E 1.0 bus provides sufficient bandwidth or not, I personally think that 2.0 is still not required.
AMD Phenom II X4 955 BE @ 4.0GHz + TU120E lapped - MSI 770-CD45 AM3 - 2x2GB OCZ DDR3 1333MHz - Sapphire HD 4870 - Samsung Spinpoint 500GB 7200RPM 16MB cache HDD - Tagan TG600-BZ Piperock - (Currently open test bed) - Windows Vista Home Premium 64bit.