[Update 25/11] 2GB of DDR2 for overclocking what to buy

[Rone]

I've had a couple different pairs of Ballistix before and I had a question about the little number in the lower right-hand side of the actual IC? On my first 2GB kit of PC2-8000 Ballistix the number was "-2F" and it was the same on my second kit. Well does anyone know what the little number is or what it means? Obviously it's put there by Crucial (at least I think it is). I'm assuming it's got something to do with their in-house binning process? Thanks for any insight you guys might have!

Yes, it is. Crucial takes their own Micron ICs and bins them differently.
Whereas for instance normal D9GMH is 3 ns memory they use the following:

-2F indicates 2ns memory, equal to 500MHz (1000 ÷ 2) » PC2-8000.
-25F indicates 2.5ns memory, equal to 400MHz (1000 ÷ 2.5) » PC2-6400.

Generally, you will only find this type of marking on relabeled Ballistix ICs.