Creme de la creme: TEAM Xtreem TXDD2048M1800HC5DC
TEAM Group announced a while back new models for the Xtreem series, that were meant to compelte the offering in both extreme performance (DDR1000 5-4-4 and DDR800 3-3-3) and good value overclocking (DDR533 3-3-3 Micron D9) segments.
Few days ago i got my hands on some of the new models and i couldn't wait to see what the highest-rated part could do. I'm talking about the M1800HC5DC, a memory kit that has double rating and comes in both 2X512MB and 2X1024MB flavours; i guess everybody's interested in what the 2GB kit can do (i know i was) so that's what you guys are going to see next.
First of all, here are the official specs:
Capacity: 2X1024MB
Rating 1: DDR1000 5-4-4-10 @ 2.2 - 2.35V
Rating 2: DDR800 3-4-3-8 @ 2.2 - 2.35V
Chips: Micron D9GMH
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As you can see, there are some nice timings with some nice clocks, and the working voltage range is a little higher than usual DDR2 specs. This (and the fact that they beg you to overclock) means higher heat dissipation, but the heatspreaders are well designed and take care of the job pretty well. Don't think that if they look so slim and simple are there just for looks, the open-top design allows air to circulate betwen heatspreaders and PCB, practically almost doubling the radiant surface of the heatspreader, and more importantly alowing the PCB to cool better. I don't know how common this knowledge is, but the PCB is taking 70-80% of the heat generated by the chips trough the chip's pins/pads wich are metallic, and only a small part is going to the heatspreader trough the plastic casing.
http://img205.imageshack.us/img205/962/bio015fe1.th.jpg http://img205.imageshack.us/img205/375/bio016sv9.th.jpg
At 2.5V you don't need extra ventilation to keep acceptable temps, and even at 3.01V (wich was the highest voltage i've tested) a simple medium rpm 92mm fan did the job very well.
This doesn't mean that 3V is OK for DDR2, it's actually beyond any limit of reliability, i've used it only for brief tests and i wouldn't recommend more than 2.5V for everyday use, and this only for Micron D9 chips. 3V WILL kill your DDR2.
