G.Skill F2-6400CL4D-2GBPK 2GB Kit DDR2-800/PC2-6400 Memory Review

Let us begin with the most important part of the test report, because the optics and packing is of course rather secondary and the possible stable performance is the most important factor. The test results are based on an ASRock AM2XLI eSATA2 SLI motherboard CPU on different frequencies depending on the reference clock for the different memory benchmarks. Thus the multiplier adjustment remains on 9x with all frequencies, because an adjustment for the CPU in half multiplier steps would be too inaccurate to get nearly the same CPU frequency for all tests.

Microsoft Windows XP Professional SP2 is used as operating system. The stability was examined with the software Memtest86
and SiSoft Sandra Lite 2007.SP1 program is used for all benchmarks, since it offers extensive adjustments and a fast result comparison.

First the maximum possible frequency of the memory module was determined. The memory frequency was increased in small steps with a fixed memory timing of 4-4-4-10 2T and default memory voltage, as long as the detailed memory test with Memtest86 runs without any errors. This quite long testing time ensured that this frequency works really stable with these modules.

The highest possible frequency with 4-4-4-10 (Tcl Trcd Tras Trp) timings was stable with 416 MHz.

With increased voltages or lower timings it’s possible to run clearly higher frequencies, because the frequency values and timings depends directly from each other.

This highest possible frequency was compared to two adjustments. On the one hand 416 MHz with SPD values (these are given by the manufacturer in the SPD IC), and on the other hand 200 MHz (x2) with SPD values.

By the way, the “Memory Bus Range” is no benchmark value, but this value is quite simple to calculate by the frequency and is useful for the benchmark comparison.

Here’re the benchmark results:

Frequency Timing RAM Range Int Buff’d iSSE2 Memory bus range
416 MHz fest (4-4-4-10 2T) 5830 MB/s 13312 MB/s
416 MHz SPD (5-5-5-15 2T) 5781 MB/s 13312 MB/s
200 MHz SPD (4-3-3-9 2T) 4649 MB/s 6432 MB/s

Here’s a diagram of the benchmark values:

Here is a direct benchmark result comparison of some DDR2 and DDR memory modules:

The result of the G.Skill PC2-6400 CL4 memory is thereby recognizably below the Crucial memory modules tested before, which reached with same timings 451 MHz (PC2-5300 CL3) and 443 MHz (PC2-6400 CL4). So the modules are thus an optical eye-catcher, but the possible overclocking results with default voltages couldn’t convince.