Kingston Technology 12GB, 1066MHz, DDR3, ECC Reg, CL7 DIMM (Kit of 3) 4R, x8 w/Thm Sen (Intel) vs Kingston Technology 4GB, 1333MHz, DDR3, ECC, Reg w/Par CL9, DIMM (Kit of 2), SR x4 w/Sen (Intel)

Key differences

The Kingston Technology 12GB, 1066MHz, DDR3, ECC Reg, CL7 DIMM (Kit of 3) 4R, x8 w/Thm Sen (Intel) has 8 GB more internal memory than the Kingston Technology 4GB, 1333MHz, DDR3, ECC, Reg w/Par CL9, DIMM (Kit of 2), SR x4 w/Sen (Intel) (12 GB vs 4 GB). The Kingston Technology 4GB, 1333MHz, DDR3, ECC, Reg w/Par CL9, DIMM (Kit of 2), SR x4 w/Sen (Intel) has 2 more CAS latency than the Kingston Technology 12GB, 1066MHz, DDR3, ECC Reg, CL7 DIMM (Kit of 3) 4R, x8 w/Thm Sen (Intel) (9 vs 7). Memory layout (modules x size): 3 x 4 GB on the Kingston Technology 12GB, 1066MHz, DDR3, ECC Reg, CL7 DIMM (Kit of 3) 4R, x8 w/Thm Sen (Intel), 2 x 2 GB on the Kingston Technology 4GB, 1333MHz, DDR3, ECC, Reg w/Par CL9, DIMM (Kit of 2), SR x4 w/Sen (Intel). Chips organisation: X8 on the Kingston Technology 12GB, 1066MHz, DDR3, ECC Reg, CL7 DIMM (Kit of 3) 4R, x8 w/Thm Sen (Intel), X4 on the Kingston Technology 4GB, 1333MHz, DDR3, ECC, Reg w/Par CL9, DIMM (Kit of 2), SR x4 w/Sen (Intel).

• Internal memory
  • 12GB, 1066MHz, DDR3, ECC Reg, CL7 DIMM (Kit of 3) 4R, x8 w/Thm Sen (Intel):12 GB
  • 4GB, 1333MHz, DDR3, ECC, Reg w/Par CL9, DIMM (Kit of 2), SR x4 w/Sen (Intel):4 GB
• Memory layout (modules x size)
  • 12GB, 1066MHz, DDR3, ECC Reg, CL7 DIMM (Kit of 3) 4R, x8 w/Thm Sen (Intel):3 x 4 GB
  • 4GB, 1333MHz, DDR3, ECC, Reg w/Par CL9, DIMM (Kit of 2), SR x4 w/Sen (Intel):2 x 2 GB
• CAS latency
  • 12GB, 1066MHz, DDR3, ECC Reg, CL7 DIMM (Kit of 3) 4R, x8 w/Thm Sen (Intel):7
  • 4GB, 1333MHz, DDR3, ECC, Reg w/Par CL9, DIMM (Kit of 2), SR x4 w/Sen (Intel):9
• Chips organisation
  • 12GB, 1066MHz, DDR3, ECC Reg, CL7 DIMM (Kit of 3) 4R, x8 w/Thm Sen (Intel):X8
  • 4GB, 1333MHz, DDR3, ECC, Reg w/Par CL9, DIMM (Kit of 2), SR x4 w/Sen (Intel):X4