The Corsair TWIN3X2048-1800C7DF G has the advantage to perform CL6 at DDR3-1600 and CL7 at DDR3-1800, therefore it has the advantage in all possible benchmarks. We wanted to compare the new memory modules with other DDR3 memory, so we used the following memory timings/cache latencies:

DDR3 comparison
Memory Frequency	Real Frequency	Voltage	FSB:RAM	CPU x	FSB	CPU Speed
DDR3 1067 CL5-5-5-15 (1T)	533,50	1.80	1:2	9	267	2403
DDR3 1150 CL5-5-5-15 (1T)	575,00	2.00	1:2	9	288	2592
DDR3 1250 CL5-5-5-15 (1T)	625,00	2.10	1:2	9	313	2817

In all cases we used the same timings and the same CPU internal multiplier. All these tests were performed with the following Bios settings:

• AI overclocking: Manual
• CPU Ratio Manual: 9
• FSB Strap: Auto
• FSB Frequency: 266~313
• PCI Frequency: Auto
• DRAM Frequency Manual: Auto calculated from FSB:RAM (1:2) divider
• DRAM Command Rate Manual: 1T
• DRAM Timing Control Manual: 5-5-5-15
• DRAM Static Read Control: Auto
• DRAM Dynamic Write Control: Auto
• Transaction Booster: Auto
• Clock Over-charging mode: Auto
• CPU/PCIE Spectrum: Disabled
• CPU Voltage, CPU Voltage Reference, CPU Voltage Damper, CPU PLL Voltage, DRAM Voltage, FSB Termination Voltage, North Bridge Voltage, North Bridge Voltage Reference, South Bridge Voltage: Auto

Memset offers information about what exactly memory timings Asus P5K3 Deluxe has chosen:

All test results are showed below:

The Crucial DDR3-1600 seems to perform not only equal but better than Corsair DDR3-1800 in most Sisoft Sandra tests. Things seem to change in SuperPI, since SuperTalent had the lowest SuperPI 2M calculation time:

Lastly, in Science Mark, the Corsair DDR3-1800 achieved the highest performance