Micron Ram Chips
-5B C – I'll start by saying this memory should be much more popular than it is. This memory is knows to clock well with very tight timings. This memory can usually achieve about 230 MHz at cas2.5-2-2-X. The cas latency is not the lowest of the bunch, but the TRD and the TRP latencies are quite good. There have been instances where this ram has clocked higher, much higher, but it is somewhat inconsistent according to other forum members. The nice thing about this ram is the price. It can be found in many value rams with the most notable being Buffalo Technologies. This memory also responds well to voltage. At about 3 volts is where it seems to hit its sweet spot. Much higher does not yield any better results. This ram is pretty easy to idenfify as the part number will say "-5B C" directly on the chips. This ram is found in many flavors of the PC3200 including Buffalo, Crucial, OCZ and a few others.
-5B G - This is a newer revision of the -5B C ram. It is still 5ns ram, but can clock higher than its earlier brother. This is the ram commonly found in Crucial Ballistix that has earned quite a reputation for doing very high clocks with great latencies. It can be considered as somewhat of an "in-between" ram, meaning it does pretty decent timings with pretty decent frequencies. Most revision G ram does about 250-260, but can retain the timings of cas2.5-2-2-X. This is better timings than many of the Hynix offerings, but you will pay a price for it. Currently, 1gb of the Ballistix is around $250 USD. If you can find these chips on any other sort of Value ram, it is QUITE the bargain. It also seems to be less picky of a motherboard than some of its competitors. Identifying this ram is just like the rest...the part number will be -5B G on the ram chips themselves. Like I mentioned earlier, it is found in Ballistix and some, but not many Value ram offerings.
-5B D - This memory IC has replaced the -5B G and is found in Crucial ballistix and other crucial offerings. It has also gone down in price, which everyone will agree, is a good thing. This ram performs very similar to the -5B G in that it will hold very respectable timings up to around 250mhz or DDR500. Users have reported running 240mhz at cas2.5-2-2-x (CCUABIDExORxDIE). Like the G revision, it responds well to voltage and also runs cas2-2-2-x at 200mhz. This ram runs super hot, so active cooling is a must for a decent overclock. This is a pretty good choice for the middle ground between the Samsung based modules and Winbond based modules. It will also run very high frequencies when timings are relaxed to cas3-3-3-x. DDR600 is within reach at these latencies.
