Question about Micron D9GMH chips - I am clueless!

Corsair PC8500C5 Rev 1.1 & 1.2 & 1.3 & 1.4 5.0-5-5-15 @ 2.2V Micron D9GMH (B6-3) 312 309
Corsair PC8500C5D DOMINATOR Rev 1.1 & 1.2 & 1.3 5.0-5-5-15 @ 2.2V Micron D9GMH (B6-3) 331 327 Handpicked
OCZ PC8000 Titanium Alpha VX2 4.0-4-4-15 @ 2.3V Micron D9GMH (B6-3) 349 373
OCZ PC7200 EL Platinum SLI-Ready Edition 4.0-4-3-15 @ 2.1V Micron D9GMH (B6-3) 366 318
OCZ PC7200 EL Platinum XTC 4.0-4-4-15 @ 2.1V Micron D9GMH (B6-3) 400 304
OCZ PC9200 FlexXLC Edition 5.0-5-5-18 @ 2.35V Micron D9GMH (B6-3) 430 415
Corsair PC9136C5D DOMINATOR Rev 1.1 5.0-5-5-15 @ 2.1V Micron D9GMH (B6-3) 439 436 Handpicked
Corsair PC6400C3DF DOMINATOR Rev 1.1 & 1.2 & 1.3 3.0-4-3-9 @ 2.2V Micron D9GMH (B6-3) 463 457 Handpicked
Corsair PC8888C4DF DOMINATOR Rev 1.2 4.0-4-4-12 @ 2.4V Micron D9GMH (B6-3) 610 659 Handpicked
Corsair PC6400C4D DOMINATOR Rev 1.2 & 1.3 4.0-4-4-12 @ 2.1V Micron D9GMH (B6-3) Handpicked

(number at the end of each line is cost from Newegg and Zipzoomfly, respectively)

All of the above chips are made with the Micron D9GMH IC. Yet, they are all branded differently (and obviously priced differently) based on design, frequency and latency. The PC6400C3DF, for example, cost $463 from Newegg and is usually not available. Others have better availability at a lower price. The question is: if one purchases a PC8500C5D, couldn't this chip run at any of the above frequency and timing? From DDR2-800, CL3 to DDR2-1142, CL5?

If one is able to do so, would it not make sense to buy the lowest cost (handpicked) chip in the group and just run it at your preferred speed and timing?

Just asking ... not too knowledgeable about Micron chips.

Chips vary. Even within a batch of the same type of chip, some will be better/faster than others. They need to be tested to figure out which are which, and the better ones usually get put on the more expensive/faster modules.

Also keep in mind that those particular rev might be hard to find.

I would advise to get whatever's got GMH at the cheapest price!

Unless you go into more specific detaisl liek your OC goal and other components, pretty much the only advice you need!