Originally Posted by Sam OCX
My current guess is that 1400/1500 means that ICs have 1333 9-9-9 JEDEC bin and 2400/2500 is they have 1600 11-11-11 JEDEC bin. Either way, these are clearly dual-sided (looking at the caps) so must be CFR ... now luke, tell us how these clock
By the way, "4GTXD" in SPD is not special - if you look back all the way up to DDR1 - GSKill use module capacity rather than kit capacity there.
That's an interesting take and you may be right. That would fit the pattern with Samsung, as well. The HCH9, a 1333 part was being shipped with the S/N "1500" in those 2400 C9 kits and the HYK0, a 1600 bin was being shipped with the "2500" S/N.
Following that logic then, a 2x8GB kit of Hynix based MFR PBC would have a S/N with a "2400" in it, but one made using the older MFR H9C (if used) would sport a "1400". Would you agree?
Over at XS there was a pic posted of the ICs of one of these 2666 C11 kits with the "1400" and it was in fact CFR H9C (a 1333 part if I'm reading the info from the Hynix site correctly).
Therefore a 2x4 double sided kit with Hynix timings and sporting the "2400" number should be expected to be using CFR PBC...a 1600 bin part?
So if you know whether it is a single-sided, or a double-sided module, then based on whether you are looking at a 2x4GB kit, or a 2x8GB kit and whether it has the 1400/2400 for Hynix or the 1500/2500 for Samsung, you have a pretty good chance of guessing what is under the hood.
Does this look right?For 4GB modules:
single-sided 1400 = MFR H9C (1333 part)
double-sided 1400 = CFR H9C (1333 part)
double-sided 2400 = CFR PBC (1600 part)
single-sided 1500 = the Samsung 4Gbit HCH9 (1333 part)
double-sided 1500 = the Samsung 2Gbit HCH9 (1333 part)
double-sided 2500 = HYK0 (1600 part)for 8GB modules:
double-sided 1400 = MFR H9C (1333 part)
double-sided 2400 = MFR PBC (1600 part)
double-sided 1500 = the Samsung 4Gbit HCH9 (1333 part)
double-sided 2500 = ??? (I don't know it)
There is also a Hynix AFR that I've gotten on some generic 8GB modules and it is like MFR so it is possible to get these instead of MFR.
There are also some Samsung variants to HCH9 that have popped up from time to time, so there are no guarantees, but generally speaking, most Hynix based stufft these days seems to be either CFR or MFR, and most Samsung would be either HCH9 (2Gbit or 4Gbit) or HYK0.
Edit: If any of you guys have GSkill kits that you have the heat spreaders removed, could you check them against what I have above and confirm Sam's statement.Edited by Reefa_Madness - 6/25/13 at 12:25pm