Intel's Core i5 Analyzed and Tested (150+ Benchmarks)
Benchmark Analysis
Sisoft Sandra RAM

(higher is better)
Sisoftware’s Sandra RAM benchmark lets the Core i7-920 strut its tri-channel DDR3 stuff. Keep in mind, we tested the Core i7-920 at its officially rated speed of DDR3/1066 vs. DDR3/1333 for the five other parts here. That extra bandwidth of the 920, in fact, may help it keep pace with the newer processors despite a general clock deficit. Still, as we’ve said, the vast majority of folks just don’t need that bandwidth.
WinRar 3.20

(lower is better)
Now that we’ve said don’t pay attention to bandwidth, here’s a test that does actually show how much it can help. We used WinRar 3.20 to compress a folder of RAW files shot with a Canon EOS 5D. The files, pretty much, are near uncompressible so we thought it would be a good way to stretch the processors. The Core i7-920 just edges out the Core i7-870 despite a 266MHz gap between the two chips.
World in Conflict

(higher is better)
We ran World In Conflict at low resolutions to take the GPU out of the equation for performance. Some have questioned this but it tells you what you would get if you had the fastest GPU in ze vorld. The results were a bit odd but we saws the Core i7-870 up front and then the budget Core i5-750 next in line. Huh? Why would the results be so whacky? We have two theories: Turbo Boost can play havoc with unpredictability. Afterall, it automatically overclocks individual cores for a given thermal load and power consumption load so it’s possible the Turbo Boost for the 750 just kicked up into high gear in the most single-threaded game. Our other theory is that the oddly super low latency that the 750 exhibitied may have contributed to its scores. The other conclusion you can draw from this is that the Phenom II and Core 2 Quad should have just stayed off the field.
Crysis

(higher is better)
We used the same low quality and low resolution mode for our Crysis runs to show you just what kind of frame rates you’ll get in four years when the newest GPUs finally make Crysis its bitch. If you happened to still be running the same rig in 2013, here’s how your CPU would shape up. Unlike some of the multi-threaded benchmarks, we actually saw very predictable results with the most expensive 870 on top, the budget builder’s favorite, the 860, in second, and the 750 and 920 pretty even.
Valve Particle Test

(higher is better)
Valve’s Particle Test is a quad-core optimized test that measures CPU performance. Here, our results were predictable with the Lynnfields seemingly scaling with clock speeds. The surprise again is how well the 920 does which can only be attributed to its third-channel of DDR3.
Proshow Producer

(lower is better)
Our Proshow Producer benchmark hammers all cores available and again, there’s that pesky Turbo Boost messing with us. The Core i7-870 should have been the fastest, but the Core i7-860 just edges past all contenders. If you’ve wondered if Hyper-Threading pays off? Yes. Notice the roughly 10 percent gain the 2.66GHz 920 has against the 2.66GHz 750. That’s generally what we’ve seen from Hyper-Threading in other benchmarks. One other conclusion: Core 2 Quad and Phenom II X4, why are you here again?