Jump to content
Corsair Community

Problem with GA-8IEXP and 512MB XMS3200 CL2


gbedard

Recommended Posts

Hi!

 

I have a Gigabyte GA-8IEXP motherboard as well as three memory sticks:

 

1 x 256MB CORSAIR XMS 2400 CL2 (CM64SD256-2400C2)

1 x 256MB CORSAIR XMS 2700 CL2 (CMX256A-2700C2 == XMS2702v1.2)

1 x 512MB CORSAIR XMS 3200 CL2 (CMX512-3200C2 == XMS3202v4.2)

 

The two first sticks work together well, but I just received the third stick

and I can't get it to work with the other two (on "auto" BIOS settings).

 

Is there a known incompatibility? Should I exchange it for another kind

of (possibly older) memory stick? Please help ASAP.

 

Thanking you in advance,

 

Guillaume

Link to comment
Share on other sites

I don't see any "incompatibility" with Gigabyte and Corsair. However, you are mixing 3 different specifications of RAM (PC2400, 2700, and 3200) and 3 VERY different revisions also. This type of mix is very likely to be unstable.

 

I'd try getting the PC3200 512mb stick to run with the PC2700 stick. Also, you need to check your MOBO spex (ask Gigabyte) to see about populating all 3 DIMM slots. You may be exceed the number of banks (aka ranks) your chipset can handle. You may simply have 3 sticks of RAM that you cannot use on that MOBO.

 

Mike.

Link to comment
Share on other sites

Hi!

 

Thanks for the quick reply.

 

I've read my motherboard's user manual and here are a couple of important

facts:

 

- Intel 845E chipset

- 3 DIMM slots (slot#1 = 2 banks; slot#2 = 1 bank; slot#3 = 1 bank)

- Double-sided x16 DDR memory is not supported by the chipset

 

From what I can tell, the XMS2400 and XMS2700 (both 256MB) sticks are

both single-sided and thus, work well in my motherboard. The XMS3200

(512 MB) stick is double-sided with 16 chips -- which is most probably

the problem.

 

However, I have no idea which 512MB memory module has one or two

banks and would satisfy the constraint (no double-sided 16x)?

 

Any hint would be greatly appreciated,

 

Guillaume

 

http://america.giga-byte.com/MotherBoard/FileList/Manual/manual_8iexp_e_other.pdf

Link to comment
Share on other sites

Hi!

 

Do you know if all 512MB sticks are all double-sided with 16 chips?

 

My motherboard (and chipset) is supposed to expandable to a total of 2GB.

There is a table in the manual showing the possible memory combinations

supported, but I do not understand it:

 

Total Memory Sizes with Unbuffered DDR DIMM:

 

Devices used on DIMM 1 DIMMx64/x72 2 DIMMx64/x72 3 DIMMx64/x72

========================================================

64 Mbit (2Mx8x4 banks) 128 MB 256 MB 256 MB

64 Mbit (1Mx16x4 banks) 32 MB 64 MB 96 MB

128 MBit (4Mx8x4 banks) 256 MB 512 MB 512 MB

128 Mbit (2Mx16x4 banks) 64 MB 128 MB 196 MB

256 Mbit (8Mx8x4 banks) 512 MB 1024 MB 1024 MB

256 MBit (4Mx16x4 banks) 128 MB 256 MB 384 MB

512 MBit (16Mx8x4 banks) 1024 MB 2048 MB 2048 MB

512 MBit (8Mx16x4 banks) 256 MB 512 MB 768 MB

 

My last resort option is to ship back the 512MB memory module and get a

third 256MB memory module, but I need 1024MB not 768MB.

 

Anyone at Corsair reading this?

 

Thanks,

 

Guillaume

Link to comment
Share on other sites

Hi!

 

Supposing that I cannot go further than PC2700 (the best memory module

that runs on my motherboard), is there a 512MB stick that could fit? As I

understand it from the specs, it can be double-sided as long as it has less

than 16 chips.

 

Thanking you in advance (again),

 

Guillaume

Link to comment
Share on other sites

Hi!

 

It appears that even those you suggested have 16 chips and are double-sided...

 

The problem is not much the PC3200 spec not fitting on my motherboard (I admit it is useless to go over PC2700 with my motherboard -- I bought the PC3200 because it was cheaper than older memory modules) but the rather strict constraint that "double-sided x16 memory modules" are not supported by the Intel 845E chipset.

 

I am wondering how to achieve the claimed 2GB extensibility... with this (excerpt from the user's manual):

 

- 3 DIMM slots (slot#1 = 2 banks; slot#2 = 1 bank; slot#3 = 1 bank)

- Double-sided x16 DDR memory is not supported by the chipset

 

DIMM slots #2 and #3 are already used by single-sided 256MB sticks.

 

Any idea?

 

Guillaume

Link to comment
Share on other sites

  • Corsair Employee

First thing, just because there are 16 chips does not mean they are By 16 IC's! All of our XMS memories are based on By 8 IC's! IE 8 IC's per bank and 2 banks per module! You cannot use a single banked module that has 16 IC's per bank with this chipset! I think you misunderstand the Spec.

So any 512 Meg module we make that is PC-2100 will run with this MB!

VS512MB266 will run with out problems or if the MB will support a faster memory module you might be able to use a 1.0 Gig module like VS1GB333 or VS1GB400!

Link to comment
Share on other sites

Thank you for the info -- I was just trying to make sense out of all those specifications and make sure that I will get the right memory module.

 

One last question, tough, since I already have two single-sided 256MB CAS2 sticks, will I be able to run the ones you suggested at CAS2 (even though they are rated at CAS2.5)?

 

Thanks,

 

Guillaume

Link to comment
Share on other sites

At a glance if you absolutely need 1gb of RAM the best option would be the VS1GB333. This is a single 1gb module with 2 banks which should run fine in slot 1 if your MOBO will boot and run DDR333/PC2700 RAM.

 

A single module makes the most sense by far due to the chipset you have. I realize you have other RAM that you would need to put aside but this RAM configuration will likely be the most stable and place far less load on the MOBO/chipset.

 

Mike.

Link to comment
Share on other sites

One last question, tough, since I already have two single-sided 256MB CAS2 sticks, will I be able to run the ones you suggested at CAS2 (even though they are rated at CAS2.5)?

 

Thanks,

 

Guillaume

I seriously doubt it, especially with 2 or more modules that are not the same revision. However, the only way to verify is to give it a try. If you try, boot with the program from http://www.memtest86.com first before booting to the OS. If it will run Memtest for a few passes, you might get it to run the OS. If it won't run Memtest, don't even try the OS.

 

Good luck, Mike.

Link to comment
Share on other sites

Archived

This topic is now archived and is closed to further replies.

×
×
  • Create New...