Memory issues

Hello,

I've been having problems with my late 2011 Macbook Pro. It originally came with Snow Leopard and 4gb of ram, which I upgraded to 8gb from Best Buy. It worked great without any issues. I skipped Lion, but did a clean install of Mountain Lion when it was available. Almost immediately, I started getting errors on Safari, occasionally shutting down.

Over the past month, my laptop became totally unstable to the point where Finder would crash. It was so bad I couldn't start the darn thing, so I wiped it and did another clean install of ML. Now Finder is no longer crashing, but Safari is occasionally.

After a quick search, I came across Rember. Problem is, it stopped running almost immediately so I thought I would post the Log here to see if anyone can help me interpret it. I am to the point where I am going to remove one of the memory modules to see if the problem goes away, or just go back to the factory 4gb memory.

Thanks,

Jerry

Here is the Rember log:


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

Mac OS X 10.8.2 (12C60) running in multiuser mode
Memory Page Size: 4096
System has 4 Intel core(s) with SSE
Requested memory: 5314MB (5572272128 bytes)
Available memory: 5314MB (5572272128 bytes)
Allocated memory: 5314MB (5572272128 bytes) at local address 0x0000000101000000
Attempting memory lock... locked successfully
Partitioning memory into 2 comparison buffers...
Buffer A: 2657MB (2786136064 bytes) starts at local address 0x0000000101000000
Buffer B: 2657MB (2786136064 bytes) starts at local address 0x00000001a7111000

Running 255 test sequences... (CTRL-C to quit)

Test sequence 1 of 255:

Running tests on full 5314MB region...
Stuck Address :

FAILURE! Data mismatch at local address 0x0000000238b2d398
Actual Data: 0xffffeffdc74d2c67

Linear PRN : setting 1 of 16

 

That is my plan, but before I do I pulled one of the 4 gb sticks and rerun the test. The stick I left in ran the test successfully, so I'll swap them out and rerun the test. If I get an error, I'll know which stick is bad.

Thanks,

Jerry