Geil ONE Series CAS1.5

Here is a pair of aggressive DDR400 512MB memory sticks if we ever saw such a thing.

Here is a pair of aggressive DDR400 512MB memory sticks if we ever saw such a thing. With an SPD (Serial Presence Detect) chip reporting the seriously raunchy latencies of 1.5-2-2-5, this would have to mark a milestone. Aside from these beasts Geil has whipped up, all other high performance sticks run at the otherwise fastest attainable CAS latency of 2 when clocked at 400MHz, so the additional headroom should exhibit some nice overclocking.

Considering the enthusiast nature of these sticks, we were surprised to find TSOP modules, rather than the generally more aggressive-friendly BGA modules. TSOP obviously has some juice left up its sleeve.

As they’re stupidly fast, the 1.5 CAS setting currently only works on mobos with BIOS updates to support 1.5 CAS, such as the LanParty range from DFI. You don’t need this though to take advantage of high speeds – the fact these babies can run at 1.5 CAS at 400MHz means they have a higher ceiling when running at the standard 2 CAS. Nice and attractive for the low-latency freaks out there.

Arming ourselves with DFI’s LanParty NF4 SLI-DR mobo, and fl ashed with the latest BIOS, we put these puppies to the test.

In dual-channel 128-bit mode, they spat out some incredible results in SiSoft Sandra. When running at DDR400 with 1.5 CAS latency, they gave a tasty integer stream score of 5980MB/s. Nice, but what about the ceiling? Amazingly, even at 600MHz they could keep to 2.5 CAS, and sported an impressive 6462MB/s integer stream score.

While not the highest overclockers in the history of humankind, they are the fastest tight timing RAM modules we’ve seen. If you’re a speed freak and want the best, Geil ONE should do you proud.