BSOD while using Opera & Switching Monitors between PCs

Please remove either of your memory sticks, running mixed memory can cause various of problems that can be difficult to diagnose properly. Please know that it does not matter if your running this setup for a long period.

Code:

[Memory Device (Type 17) - Length 34 - Handle 002ah]
  Physical Memory Array Handle  0028h
  Memory Error Info Handle      [Not Provided]
  Total Width                   64 bits
  Data Width                    64 bits
  Size                          4096MB
  Form Factor                   0dh - SODIMM
  Device Set                    [None]
  Device Locator                ChannelA-DIMM0
  Bank Locator                  BANK 0
  Memory Type                   18h - Specification Reserved
  Type Detail                   0080h - Synchronous
  Speed                         1600MHz
  Manufacturer                  Samsung
  Serial Number                         
  Asset Tag Number                        
  Part Number                   M471B5173QH0-YK0  
[Memory Device (Type 17) - Length 34 - Handle 002ch]
  Physical Memory Array Handle  0028h
  Memory Error Info Handle      [Not Provided]
  Total Width                   64 bits
  Data Width                    64 bits
  Size                          2048MB
  Form Factor                   0dh - SODIMM
  Device Set                    [None]
  Device Locator                ChannelB-DIMM0
  Bank Locator                  BANK 2
  Memory Type                   18h - Specification Reserved
  Type Detail                   0080h - Synchronous
  Speed                         0MHz
  Manufacturer                  Hynix/Hyundai
  Serial Number                         
  Asset Tag Number                        
  Part Number                   HMT425S6AFR6A-PB