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Hi. Just posting before/after a memory upgrade on a stock 6,2 MacBook Pro runing Lion. System Info: "Core i7" 2.66 15" Mid-2010 Identifiers: Mid-2010 15" - MC373LL/A Before stats: Execution results Operating system: Mac OS X 10.7.2 (Build 11C74) Model: MacBookPro6,2 Processor: Intel® Core™ i7 CPU M 620 @ 2.67GHz Frequency: 2.66 GHz Total CPU number: 4 Physical CPU number: 1 Bus frequency: 4.80 GHz Memory size: 4.00 GB Memory type: 1067 MHz DDR3 Compiled with: GCC 4.2.1 (Apple Inc. build 5646) Final result: 4.44 iBench_fp test suite Edge detection: 1.78 JPEG compression: 8.66 Fast Fourier Transform: 5.30 Eigenvalue: 2.07 Numerical integration: 2.41 Householder transformation: 6.68 Gaussian blur: 1.30 Mandelbrot set generation: 5.88 LU decomposition: 3.37 Partial result: 3.45 iBench_int test suite Quick sorting: 11.91 N Queens problem: 5.29 Bubble sorting: 3.44 Integer factorization: 4.50 MD5 hashing: 5.96 Maximum Common Divisor: 5.25 Prime numbers calculation: 5.12 Kruskal tree search: 9.96 Blowfish cipher: 2.15 ZIP compression: 7.08 Binary searching: 8.88 Partial result: 5.71