Articles: Memory

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Although Corsair positions its TWINX2048-3500LLPRO as low-frequency modules supporting aggressive timings, their default timings are slackened a little relative to 2-2-2, but as a matter of fact, no existing DIMM module of 1GB capacity supports 2-2-2 timings. Thus, the Corsair TWINX2048-3500LLPRO modules have the lowest timings among 1GB memory modules available today.

And here’s the SPD information for these modules:

As you see, the SPD chip contains the specified timings and a lower-than-specified 200MHz frequency (400MHz DDR). It means you can use the Corsair TWINX2048-3500LLPRO in new systems at the default settings.

The results of our overclocking the Corsair TWINX2048-3500LLPRO kit at the default 2.6V voltage are presented in the next diagram:

So, these modules don’t have a big frequency reserve. As you can see, we only managed to lift the memory frequency up to 225MHz (450MHz DDR). The frequency potential is higher at less aggressive timings, though. For example, we hit 250MHz (500MHz DDR) frequency at 2.5-3-3-10 timings, but this seems to be the maximum. We didn’t get any frequency gain by using bigger timings.

We must warn you that Corsair TWINX2048-3500LLPRO modules react badly to raising their voltage, which is the normal behavior of revision B chips from Infineon used in these modules. Moreover, this memory works even slower at higher voltage than it would work at the default voltage. For example, we could only achieve 233MHz frequency when overclocking it at 2.8V voltage even with not-very-aggressive timings (at the default timings the memory is operable in this case, though).

So, the Corsair TWINX2048-3500LLPRO memory kit is best used at frequencies a little over 200MHz (400MHz DDR), but with aggressive timings. These modules can’t beat high frequencies, their limit being 250MHz. This should be enough in most cases, though, especially since the integrated memory controller of Athlon 64 processors offers you usable step-down divisors to set the memory frequency.

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