Memtest Results Corsair / CMZ8GX3M2A1866C9

Hi, my PC has started crashing whilst gaming, black screen, loud buzzing noise.

I've had the following come up on Memtest - it's not a full four passes, I got to 39 errors in just a few minutes.

I've checked timings and BIOS, all is as it should be. So, my memory has given up the ghost? Or could it be the processor?


Summary
Report Date 2014-11-05 15:17:35
Generated by MemTest86 V5.1.0 Free (64-bit)
Result FAIL

System Information
EFI Specifications 2.31
CPU type Intel Core i7-2700K @ 3.50GHz
Measured CPU Speed 3500 MHz [Turbo: 3580.1 MHz]
# Logical Processors 8
L1 Cache 64K (97448 MB/s)
L2 Cache 256K (52274 MB/s)
L3 Cache 8192K (31296 MB/s)
RAM 8239M (20862 MB/s)
DIMM #0 4GB DDR3 XMP PC3-14900
Corsair / CMZ8GX3M2A1866C9
9-10-9-27 / 933 MHz / 1.500V
DIMM #1 4GB DDR3 XMP PC3-14900
Corsair / CMZ8GX3M2A1866C9
9-10-9-27 / 933 MHz / 1.500V

Result summary
Test Start time 2014-11-05 14:49:15
Elapsed Time 0:28:02
Memory Range Tested 0x0 - 21F000000 (8688MB)
CPU Selection Mode Single (CPU #0)
# Tests Passed 4/10 (40%)

Lowest Error Address 0x1187E088 (280MB)
Highest Error Address 0x1387E368 (312MB)
Bits in Error Mask 0000000000000400
Bits in Error 1
Max Contiguous Errors 1

Test # Tests Passed Errors
Test 0 [Address test, walking ones, 1 CPU] 1/1 (100%) 0
Test 1 [Address test, own address, 1 CPU] 1/1 (100%) 0
Test 2 [Address test, own address] 1/1 (100%) 0
Test 3 [Moving inversions, ones & zeroes] 1/1 (100%) 0
Test 4 [Moving inversions, 8-bit pattern] 0/1 (0%) 4
Test 5 [Moving inversions, random pattern] 0/1 (0%) 9
Test 6 [Block move, 64-byte blocks] 0/1 (0%) 17
Test 7 [Moving inversions, 32-bit pattern] 0/1 (0%) 1
Test 8 [Random number sequence] 0/1 (0%) 1
Test 9 [Modulo 20, ones & zeros] 0/1 (0%) 1
Test 10 [Bit fade test, 2 patterns, 1 CPU] 0/0 (0%) 0