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Corsair 2GB XMS2 PC2-6400 PRO
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by Rob Williams on March 27, 2006 in Memory

If you are seeking out a new DDR2 kit, then make sure it’s at least 2GB! The 6400PRO from Corsair boasts the fast speed of DDR2-800 with timings of 5-5-5. Best of all though, it rolls in at 2GB and includes some purdy LED’s! (This article has been edited since first publishing due to debunked results the first time around.)

Overclocking


As mentioned earlier, these modules are rated for DDR2-800 (PC2-6400) speeds, at normal timings of 5-5-5-12. Of course, 5-5-5 tends to be high on any scale, so my immediate plans were to see if 4-4-4 was possible with added voltage while retaining the stock speeds. Despite being high end speed, these modules are designed to work perfectly with 1.9v.

Sadly, like most DDR2 modules I take a look at, I am unsure which memory chips these modules use. I hope to get this info from Corsair shortly. Either way, these are high end modules designed for overclocker’s, so we can obviously expect some potential here. To cut to the chase, here are the overclocked settings I have found completely stable:

    Successful Overclocks

  • #1 400MHz – DDR2-800 (PC2-6400)    @ 1.9v – 5-5-5-12 : 200FSB – CPU 2.8GHz
  • #2 400MHz – DDR2-800 (PC2-6400)    @ 1.9v – 4-4-4-12 : 200FSB – CPU 2.8GHz
  • #3 400MHz – DDR2-800 (PC2-6400)    @ 1.9v – 4-4-4-12 : 240FSB – CPU 2.8GHz
  • #4 400MHz – DDR2-800 (PC2-6400)    @ 1.9v – 4-4-4-12 : 267FSB – CPU 3.75GHz
  • #5 440MHz – DDR2-880 (PC2-7000)    @ 2.0v – 4-4-4-12 : 220FSB – CPU 3.08GHz
  • #6 445MHz – DDR2-890 (PC2-7100)    @ 2.0v – 4-4-4-12 : 267FSB – CPU 3.75GHz
  • #7 500MHz – DDR2-1000 (PC2-8000)  @ 2.2v – 4-4-4-12 : 250FSB – CPU 3.51GHz
  • #8 467MHz – DDR2-933 (PC2-7500)    @ 2.2v – 4-4-4-12 : 280FSB – CPU 3.93GHz

As you can see, the modules worked at 4-4-4 timings all the way up to DDR2-1000 speeds. I don’t know why Corsair didn’t just set the SPD to 4-4-4, because they are extremely stable at stock speeds with those timings. Your results may vary, but they certainly kept solid with my setup.

The modules scaled quite well, and I managed to get them to 500MHz while still retaining the 4-4-4 timings. The voltage had to be pumped up to 2.2v, but is still a safe spot. With proper cooling, such as good fan placement on the fans, they may be able to go higher. All of these proved stable without any sort of cooling, due to the fact I can’t figure out a good fan solution. It’s in the works though, and once I get one in there I will continue to see if I can bring these further. Stable at DDR2-1000 is a great achievement though, but we’ll see if the OC is worth it in our benchmarks.