I have a Dell Inspiron 15R N5110 with 2x4GB DIMM3 modules on the 2 Slots. I have run the memory tests in all possible ways (From boot diagnostics and within Windows) and it always fails.

Strange part is that if I test with either of my 2 DIMMS on Slot 1, I get no error so I cannot blame any of my 2 DIMMS. However, if I test with either of the 2 DIMMS on Slot 2 I always get error. I believe it was like that since I bought it but my son was using the laptop and he was complaining of some slow performance but I didn't have the chance to check it thoroughly. Is it possible for the Slot 2 to have failed but my system keep working fine? any fix if so (no waranty now)?

Please note that I have latest BIOS, and removed/reinserted the DIMMS and fre firmly seated.

In Windows I get: Advanced Pattern Test Failed WME02-IX0. I also run the advanced test and stress test and I get the following details:

Advanced Pattern Test
Test Started		28/08/2014 1:54:13 μμ
Error Message:	Memory read-write error at physical address 0000000057CB0194H. Wrote pattern 00000000H, read back pattern 00200000H.	28/08/2014 1:58:49 μμ
Error Message:	Memory read-write error at physical address 0000000057CB0194H. Wrote pattern 0F0F0F0FH, read back pattern 0F2F0F0FH.	28/08/2014 1:58:55 μμ
Error Message:	Memory read-write error at physical address 0000000057CB0194H. Wrote pattern 55555555H, read back pattern 55755555H.	28/08/2014 1:59:00 μμ
Error Message:	Memory read-write error at physical address 0000000057CB0194H. Wrote pattern 80808080H, read back pattern 80A08080H.	28/08/2014 1:59:03 μμ
Error Message:	Memory read-write error at physical address 0000000057CB0194H. Wrote pattern 40404040H, read back pattern 40604040H.	28/08/2014 1:59:06 μμ
Error Message:	Memory read-write error at physical address 0000000057CB0194H. Wrote pattern 10101010H, read back pattern 10301010H.	28/08/2014 1:59:12 μμ
Error Message:	Too many errors. Test canceled.	28/08/2014 1:59:12 μμ
Test Finished:	Failed (Error code: WME02-IX0)