Micron Memory

[ajcstr]

I have two 168 pin 64MB SDRAM PC100 CL=2 sticks. One is labeled PC100-222-620, the other PC100-322-620. Both were manufactured by Micron (the first one is from Crucial the 2nd came with the PC). Is there any significance to the 222 vs 322 or are these just part numbers? Both seem to have the same specs otherwise. Both should be non-parity.

[xroyal]

You could go to Micron 's site, and put the data in Search? Good luck.

[ajcstr]

Yeah - had to pull the stick out to get the model number, and after some paging through the various PDF's on MICRON's site I got part of my answer - need a little help still though. Apparently, the 322 refers to CAS latency = 3 and the 222 refers to CAS latency = 2 (first digit of these numbers is the CL) so I was incorrect in saying both were CL=2. Anyway, I am not sure what this means other than CL 2 may be faster. The only question I have is if these things can be used together, in place of each other, etc without making any system changes (EG BIOS, CMOS, whatever). Not interested in overclocking or tweaking just want to plug them in and go!

[memoryman]

You can put both in the same motherboard as long as the motherboard will run at PC100 speed. The system will run at the speed of the slowest module (the CL3 module).
You won't need to make any changes in the BIOS as your system will automatically read the SPD data in each of the EEPROMs on the modules and configure the timings for the Northbridge accordingly.

[ajcstr]

LOL, lost me with the 2nd half of the 2nd statement, but thanks. I figured it would be the same effect as putting a PC133 module in, would work, just would not get the full benefit.

[{Sniping}Waste]

Can you post the part number in the memory chips and not the sticker.

[ajcstr]

chips are MTL8LSDT864AG-10C and MTL8LSDT864AG-10E. I did find the answer using these part numbers on MICRON's site - the first chip is CL=3 and the other is CL=2.

[{Sniping}Waste]

chips are MTL8LSDT864AG-10C and MTL8LSDT864AG-10E. I did find the answer using these part numbers on MICRON's site - the first chip is CL=3 and the other is CL=2.

I need the part number off the memory chips on the dimm and not the part number on the sticker on the dim.

EXAMPLE
MT 48LC32M8A2
TG -75B

[CrucialLabs]

The Cas Latency of module #1 is CL-2 and #2 is CL-3. Both memory modules when installed will work at CL-3. The system will always default to the speed of the slowest module like memoryman said. No real secret just a fact. So if both modules are 100MHz but the Cas Latency is different they will work at 100MHz but both will have an equal CL of 3.

thank you Memoryman for your explaination.