DDR1 IC Inquiry

[Tech Tweaker]

Originally Posted by Tech Tweaker

The sticks are:
Corsair Value Select:
Model no.: VS1GB400C3
Lot Code: 09241405
On the IC it says these numbers: 64M8BCG PRB090024
And on the front of the PCB it says: D68001H, On the back in various places: BP MLL, E186014, 94V-0
I'm not really sure what all of the numbers on the PCB mean, but I know BP refers to a company and I assume one of the others is a model number.
I know some of this information might not really be necessary, but I figured I would give you all the information I knew to help in identifying it.

Corsair XMS:
Model no.: CMX1024-3200C2PT
Revision: XMS3202v3.1
Lot code: 09030808

Okay, I finally managed to find out that the Value Select memory I have generally uses either Micron -B5 D or Samsung UCCC IC's.

I've read that the stick of XMS I have supposedly uses Infineon B-5 IC's.

[Tech Tweaker]

Originally Posted by Tech Tweaker

Okay, I finally managed to find out that the Value Select memory I have generally uses either Micron -B5 D or Samsung UCCC IC's.

I've read that the stick of XMS I have supposedly uses Infineon B-5 IC's.

Today I discovered that some VS modules also use Hynix D43 IC's on a BrainPower PCB, as I bought one recently and to my surprise it had them on it. Strange, in all of my research on this I had never heard of any cases of people finding Value Select RAM with Hynix D43 chips.

[Tech Tweaker]

Got another one I'm trying to find out more about.

I checked and couldn't find it listed previously.

Corsair XMS:
Model no.: CMX1024-3200C2PRO
Revision: XMS3202 v1.4
Lot code: 0608176-1

[Tech Tweaker]

Got another one.

Model no.: CMX512-3200C2
Revision: XMS3202 v1.5
Lot code: 0521077-0

[Tech Tweaker]

I've got some more sticks here I'm trying to find info on.

CMX512-3200C2PT (shows up as CMX512-3200C2 in CPU-Z)/XMS3202v1.1/0304056 (SPD timings of 2.5-3-3-8 at 200MHz with 2.5v)

CMX512-3200C2PT/XMS3202v5.2/0530088-0 (part of a 1GB kit) No idea, but I'm assuming Promos -5 Rev A, since all the others found on the list that were from that year seem to have those IC's.

CMX512-3200C2PT/XMS3202v5.2/0602111-0

[Tech Tweaker]

Originally Posted by Tech Tweaker

CMX512-3200C2PT (shows up as CMX512-3200C2 in CPU-Z)/XMS3202v1.1/0304056 (SPD timings of 2.5-3-3-8 at 200MHz with 2.5v)

This is supposedly Winbond BH-6 according to some other websites I have looked at.

[Wired]

I have yet to see a site listing DDR1 ICs that didn't guess / assume something. Unlike the DDR2/DDR3 ICs, there's no logic involved in the part number where someone outside of Corsair could determine the IC (aside from taking it apart).

[Tech Tweaker]

Originally Posted by Wired

I have yet to see a site listing DDR1 ICs that didn't guess / assume something. Unlike the DDR2/DDR3 ICs, there's no logic involved in the part number where someone outside of Corsair could determine the IC (aside from taking it apart).

Well, considering Corsair themselves have not specified what that stick actually uses, or what any of the other ones I've asked about use, I was forced to look it up on my own.

I'll take an educated guess and/or some other website's word over having no information at all.

[Christian Ney]

Can I have the IC of :

CMX512-2700C2PT XMS2702v5.1
0509073-1

Please.

Thank you

EDIT: I removed the heatspreader, these are Mosel Vitelic T5B

[theRev]

Originally Posted by Christian Ney

Can I have the IC of :

CMX512-2700C2PT XMS2702v5.1
0509073-1

Please.

Thank you

Doubtful. I've been waiting for over a year and they haven't got around to mine yet. I don't think they even care any more.

[Tech Tweaker]

I don't know what IC these sticks use, but they are far from "Value Memory." Mine got up to DDR500/PC4000 speeds at the default 3-3-3-8 timings and 2.7 volts.

The RAM in question:
VS2GBKIT400C3 (2x VS1GB400C3 sticks)
Date code/Lot code: 09510073
numbers on IC: PRB0900950

I don't know why, but I seem to have had really good luck with these VS sticks that were made in 2009. So far had three sticks from that year, and all of them run great at high clock speeds without having to change the RAM divider or loosen the timings, a slight voltage bump may be necessary to keep them stable at speeds above DDR478-480 though.

If you see these sticks, buy them, if they perform anything like the ones I've found you'll be very happy with the results.

[Tech Tweaker]

Originally Posted by Tech Tweaker

I don't know what IC these sticks use, but they are far from "Value Memory." Mine got up to DDR500/PC4000 speeds at the default 3-3-3-8 timings and 2.65 volts I believe (probably needs about 2.7-2.75 to be fully stable though).

The RAM in question:
VS2GBKIT400C3 (2x VS1GB400C3 sticks)
Date code/Lot code: 09510073
numbers on IC: PRB0900950

I don't know why, but I seem to have had really good luck with these VS sticks that were made in 2009. So far had three sticks from that year, and all of them run great at high clock speeds without having to change the RAM divider or loosen the timings, a slight voltage bump may be necessary to keep them stable at speeds above DDR478-480 though.

If you see these sticks, buy them, if they perform anything like the ones I've found you'll be very happy with the results.

I've now also gotten them to run at timings of 2.5-3-3-7 at the default 200MHz/DDR400 speed without any voltage bump, and they may be able to achieve lower timings than that, but that is one of the only ones I tried that worked. The only other timings I tried were 2-3-2-6, the default for a stick of CMX1024-3200C2PRO I have here, the VS module didn't like those timings at all though and defaulted to 100MHz at 2.5-2-2-6 (or something like that).

Seems like very versatile memory for both systems which perform well at high clock speeds and lower latencies.

[Tech Tweaker]

Originally Posted by Tech Tweaker

Got another one I'm trying to find out more about.

I checked and couldn't find it listed previously.

Corsair XMS:
Model no.: CMX1024-3200C2PRO
Revision: XMS3202 v1.4
Lot code: 0608176-1

Originally Posted by Tech Tweaker

I don't know what IC these sticks use, but they are far from "Value Memory." Mine got up to DDR500/PC4000 speeds at the default 3-3-3-8 timings and 2.7 volts.

The RAM in question:
VS2GBKIT400C3 (2x VS1GB400C3 sticks)
Date code/Lot code: 09510073
numbers on IC: PRB0900950

I don't know why, but I seem to have had really good luck with these VS sticks that were made in 2009. So far had three sticks from that year, and all of them run great at high clock speeds without having to change the RAM divider or loosen the timings, a slight voltage bump may be necessary to keep them stable at speeds above DDR478-480 though.

If you see these sticks, buy them, if they perform anything like the ones I've found you'll be very happy with the results.

Any ideas as to what IC's these sticks have based upon the information given and/or my results with the Value Select kit and/or my XMS stick?

[Wired]

Originally Posted by Tech Tweaker

Any ideas as to what IC's these sticks have based upon the information given and/or my results with the Value Select kit?

As it states in the first post:

Value Select ModulesValue Select modules are built with RAMs that are procured at the wafer level and are packaged and tested to our specifications. As such, they are not available as individual ICs, only as modules. This approach allows us to ship product with very good performance characteristics, low product cost, and a very low return rate.

[Tech Tweaker]

Originally Posted by Wired

As it states in the first post:

Yeah, you already told me that once. Really I'm looking for answers from someone who knows more about the behavior of memory and how certain IC's perform. Those VS sticks run at DDR500 with timings of 2.5-3-3-7-2T with stock voltage. Now, is there anyone here that has anything helpful to contribute on the subject other than "Value Select modules are built with RAMs that are procured at the wafer level and are packaged and tested to our specifications. As such, they are not available as individual ICs, only as modules. This approach allows us to ship product with very good performance characteristics, low product cost, and a very low return rate." (which by the way is just a bunch of overly generalized marketing jargon, and says nothing about the chips themselves)?

Also, you completely missed the stick of CMX1024-3200C2Pro I asked about.