 "Corsair Vengeance - DDR3 8 GB: 2 x 4 GB DIMM 240-pin" " Corsair 240-pin CMZ8GX3M2A1600C9 System Memory (RAM) CDWG.com
"Vengeance Low Profile heat spreaders have a reduced height of 1.03". They're designed for high-performance systems with extra-large CPU coolers, small form factor system builds, or any other space-constrained application where you need high-performance memory but standard Vengeance modules might not fit." 
 "Corsair 4GB 2X2GB DDR3 1333MHz CL9 Dual Channel Memory Kit" Kit - CMV4GX3M2A1333C9 NCIX"
 Quick Specs: Compatibility Desktop Error Checking Non-ECC Number of Modules 2 x 2 GB Number of Pins 240-pin Signal Processing Unbuffered Form Factor DIMM Memory Speed 1333 MHz Memory Size 4 GB Memory Technology DDR3 SDRAM Memory Standard DDR3-1333/PC3-10600 ProductId 1015767274