Synthetic CPU and Memory Tests
SiSoft Sandra 2009 SP4
The latest version of SiSoft Sandra offers up a lot of new features including GPU performance testing and Nehalem processor support. 

Intel Lynnfield Core i7-870 and Core i5-750 Processor Review - Processors 120

Intel Lynnfield Core i7-870 and Core i5-750 Processor Review - Processors 121

Intel Lynnfield Core i7-870 and Core i5-750 Processor Review - Processors 122

Intel Lynnfield Core i7-870 and Core i5-750 Processor Review - Processors 123

Intel Lynnfield Core i7-870 and Core i5-750 Processor Review - Processors 124

Intel Lynnfield Core i7-870 and Core i5-750 Processor Review - Processors 125

Intel Lynnfield Core i7-870 and Core i5-750 Processor Review - Processors 126
 
In the raw CPU arithmetic results we see that the Core i5-750 is competing well with the Core i7-920 and the i7-870 falls just a bit behind the Core i7-975 part that costs about twice as much.  The multimedia results seem to mirror that as well though the memory bandwidth results clearly show how the third channel in the Nehalem memory controller can offer theoretical improvements in performance. 

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