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| Kingston HyperX Ultra Low Latency PC3200 |
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| Written by Mikhail Ivanenkov | |
| Wednesday, 20 June 2007 | |
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The HyperX was fun though. At the stock settings of PC3200 (DDR400) the SPD defaulted to 2.5-2-2-5 timings. Apparently this is typical of Samsung TCCD modules so you'll need to manually set it to 2-2-2-5 in the BIOS. From there I went up in 5MHz increments until there was instability at 210MHz. I then upped the voltage from 2.5V to 2.6V (the recommended). Still unstable. I then went up to 2.7V and finally to 2.8V (the highest my motherboard can go), at which point the system would continue to lock up. A slight bump down to 209MHz was stable at 2-2-2-5 and 2.8V. I tried setting it to 215MHz just for fun but before the power-on tests even came up I got an error saying neither my keyboard nor my mouse could be detected. I then had to loosen the timings. An interesting note: certain timing combinations just don't work, even if they are looser. It really depends on the memory being used and the rest of the system configuration. For example, I couldn't get past 215MHz using 2.5-3-3-6 or even 2.5-3-3-7, but 2-3-3-6 worked perfectly (from here on down I had the voltage set to 2.8V). At the latter setting I went up 5MHz at a time until I topped out at 240MHz which was the first time the computer crashed. I then increased the CPU voltage slightly and used a higher quality PSU. This caused the instability to be less noticeable (I would get random errors but the OS still ran), so the final highest stable overclock I was able to reach was 235MHz at 2-3-3-6 and 2.8V (actually 2.75V according to Motherboard Monitor). Something else to keep in mind is that I'm using one particular configuration. Some sites that reviewed the same memory had better luck (even reaching DDR500 and higher) while others were in the same boat if not worse. What kind of performance boost you'll be able to squeeze out depends on the actual chips you get (luck of the draw) and the type of other hardware you're running. So, for testing I'll be comparing the ValueRAM, HyperX at default, HyperX maximum stable overclock at 2-2-2-5 (209MHz effectively DDR418), and HyperX maximum stable overclock at 2.5-3-3-6 (235MHz effectively DDR470). The labeling method on the graphs is as follows:
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| Last Updated ( Wednesday, 20 June 2007 ) |
