HotHardware has access to some Intel Core 2 Duo E6750 samples and put them to the test. The results mean more bad news for the folks at AMD.
E6750 running at stock speeds is barely distinguishable from the E6700 The E6750 is basically a E6700 processor that runs on a 1333MHz Front Side Bus. This increase in FSB speed from 1066MHz means the CPU gets a performance boost of about 5%. Not bad but nothing to get excited about.
What is exciting is the overclocking potential of this CPU. The HotHardware team got it to run at 3.92GHz using the stock Intel air-cooler. Even while overclocked the CPU temperature didn't go beyond 48°C/118°F. Admittedly, this was an open-air bench test so results might vary when it's locked up inside a PC case.
A note about overclocking: You have to take overclocking results based on sample processors with at least a small pinch of salt. It's quite possible that Intel has hand-picked samples that offer the best performance under higher than rated speeds. There's no guarantee that the E6750 you end up with will perform as well as these samples. Overclocking can also seriously shorten the life of your processor. You have been warned!
The bottom line is that overclocking aside, the E6750 running at stock speeds is barely distinguishable from the E6700. The higher FSB speeds mean a greater memory bandwidth which in turn means a performance boost on about 1 - 6% depending on the application. The place that the E6750 stands out is the increased overclocking headroom that Intel has managed to achieve. Depending on price (and how well production models act under real world overclocking conditions) this could be the must have CPU for power enthusiasts.