I know for a fact that the 6000+ has poor gaming performance. This is my data from a variety of tests.
Intel rig: E6850, Gigabyte P35 DS3L
Amd rig: 6000+, Gigabyte M57SLI-S4
It's not an apples to apples comparison, but close enough.
3DMark06:
Intel E6850 --- 3.0Ghz --- 2Gb --- 8800GTS 512 --- 7,200 ---12,528
AMD 6000+ --- 3.0Ghz --- 2Gb --- 9800GTX 1024 --- 10,000 --- 6,612
Lightsmark07 - 1280x1024:
Intel E6850 447.2 fps, AMD 6000+ 199.1 fps
- 1680x1050
Intel E6850 380.1 fps, AMD 6000+ 186.9 fps
From AMD to Intel rig = +95% increased fps
Crysis Benchmark Tool - High Spec, 1680x1050
- GPU Test
Intel - 32.89 avg fps, AMD - 21.95 avg fps
- CPU Test
Intel - 30.71 avg fps, AMD - 22.02 avg fps
From AMD rig to Intel rig = +50% increased fps