After a week of deciding to purchase memory upgrade to 4GB or 8GB. I finally decided on taking the risk of upgrade it to the maximum hardware limit of my Macbook 5,1; 8GB. During those time I did some research and did not find any good review. Mostly said that its unstable and requires reboot after several minutes using them.
It’s been almost a week since the upgrade and I did not bump into any issues and felt a lot better now considering that I have more memory to use and allows me to open more application and leave them minimized if not used.
For RM240, I’ve purchased two piece of Kingston SO-DIMM memory KVR1066D3S7/4G. Here’s some screenshots and memory test result if you’re considering to upgrade to 8GB as well. However, be sure to install the EFI Update on Snow Leopard which allows you to use a maximum of 8GB RAM.
Memtest version 4.22 (64-bit) Copyright (C) 2004 Charles Cazabon Copyright (C) 2004 - 2008 Tony Scaminaci (Macintosh port) Licensed under the GNU General Public License version 2 only Log file written to //memtest.log Mac OS X 10.6.7 (10J869) running in single user mode Memory Page Size: 4096 System has 2 Intel core(s) with SSE Requested memory: 7648MB (8019578880 bytes) Available memory: 7648MB (8019578880 bytes) NOTE: Memory request is too large, reducing to acceptable value... Allocated memory: 7433MB (7795030656 bytes) at local address 0x0000000101000000 Attempting memory lock... ERROR: Memory lock failed - reason unknown. WARNING: Testing with unlocked memory may be slower and less reliable Splitting allocated memory into 2 comparison buffers... Buffer A: 3716MB (3897515328 bytes) starts at local address 0x0000000101000000 Buffer B: 3716MB (3897515328 bytes) starts at local address 0x00000001e94f5d40 Running 3 test sequences... (CTRL-C to quit) Test sequence 1 of 3: Running tests on entire 7433MB region... Stuck Address : ok Linear PRN : ok Running comparison tests using 3716MB buffers... Random Value : ok Compare XOR : ok Compare SUB : ok Compare MUL : ok Compare DIV : ok Compare OR : ok Compare AND : ok Sequential Increment: ok Solid Bits : ok Block Sequential : ok Checkerboard : ok Bit Spread : ok Bit Flip : ok Walking Ones : ok Walking Zeroes : ok Test sequence 2 of 3: Running tests on entire 7433MB region... Stuck Address : ok Linear PRN : ok Running comparison tests using 3716MB buffers... Random Value : ok Compare XOR : ok Compare SUB : ok Compare MUL : ok Compare DIV : ok Compare OR : ok Compare AND : ok Sequential Increment: ok Solid Bits : ok Block Sequential : ok Checkerboard : ok Bit Spread : ok Bit Flip : ok Walking Ones : ok Walking Zeroes : ok Test sequence 3 of 3: Running tests on entire 7433MB region... Stuck Address : ok Linear PRN : ok Running comparison tests using 3716MB buffers... Random Value : ok Compare XOR : ok Compare SUB : ok Compare MUL : ok Compare DIV : ok Compare OR : ok Compare AND : ok Sequential Increment: ok Solid Bits : ok Block Sequential : ok Checkerboard : ok Bit Spread : ok Bit Flip : ok Walking Ones : ok Walking Zeroes : ok All tests passed! Execution time: 24073 seconds.