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XMS3500 / 3700 and MSI compatibility


Digory

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Dear Forum,

Hoping for bit of advice re compatibility - maybe obvious to you guys :biggrin:

I have a MSI mobo 865PE Neo2 currently fitted with 512 DDR [x2 256 sticks] XMS3500 [CMX256A-3500C2PT – I think]

Old and not very exciting I know but it does the job – albeit slowly these days. I have seen two sticks of 256 for sale and wondered if it was compatible and would plug in my two unused slots:

Corsair DDR Matched pair platinum series

256 Ram (to 512MB) CMX 256A - 3700 PT / 466 MHZ / XMS 3700

If compatible, would settings need tweak.Current settings [as recommended by Ram Guy at time of build]

CAS latency is set to 2.0 clocks

RAS precharge is 2 clocks

RAS to CAS delay is 3 clocks

precharge delay is 6 clocks

burst length is 8

DDR power voltage is 2.75v

 

Thanks D

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It's never recommended to mix DDR1 of different part # / version # / lot #. Also, that memory hasn't been made in years. If you're buying from another end user it would not have a warranty.

 

Having said that, you could try 3-4-4-8-2T @ 333 Mhz. If stable, then slowly bump up the speed and re-test for stability.

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Thanks advice - guess will avoid then.

How can I find compatible listing for a retired board like mine. Looked on the Corsair site but could not find mine:

MSI 865PE NEO2 FIS2R

Lots very similar but none exactly the same.

Thanks D.

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  • 2 months later...
  • Corsair Employees
Still looking for elusive ram

 

Is this part number what I need: CMC2GX1M2A400C3

I dont really understand the part numbers

RAM guy's has recomended "TWINX2048-3200C2"

 

Thanks D:-)

 

The first part is a single stick 1GB 400MHz Cas Latency 3. The second part number is a 2x1GB kit of 400MHz Cas Latency 2. If you are still having a problem finding modules I would suggest the VS2GBKIT400C3 as they may be in stock and would work with your machine.

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  • 2 weeks later...

Dear Ram Guy,

 

Thanks for the always helpful advice. I have tried a few retailers that were listing XMS TWINX2048-3200C2 but on asking for availability they say no stock. I would still like to get some XMS so will look at pre-owned.

 

Apart from getting compatibility correct, is there anything to look out for when buying pre-owned. Does an overclocked life mean a hard life and hence best avoided. Thanks D:-)

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  • 2 weeks later...
Ram Guy

 

I have [at long last] found some XMS RAM - TWINX2048-3200C2PT

 

Grateful if you could advise the correct settings for MSI 865PE Neo2 FIS2R.

 

Manny Thanks

 

D:¬)

 

The correct settings for that memory (assuming that you have a CPU with an FSB speed rating of "800" MHz (FSB800) are:

 

CAS latency: 2.0 clocks

RAS precharge: 3 clocks

RAS to CAS delay: 3 clocks

precharge delay: 6 clocks

DDR power voltage: 2.70V to 2.75V

 

Hope this helps.

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  • 6 months later...

folks, fitted the TWINX2048-3200C2 modules.

Unfortunately, machine would not boot - more park than post.

Refitted my meagre 512 DDR [x2 256 sticks] XMS3500 [CMX256A-3500C2PT] and everything okay.

Did notice that the TWINX2048 was a bit warm when I removed it.

Initially, left the BIOS setting as set for the outgoing XMS3500:

  • CAS latency is set to 2.0 clocks
  • RAS precharge is 2 clocks
  • RAS to CAS delay is 3 clocks
  • precharge delay is 6 clocks
  • burst length is 8
  • DDR power voltage is 2.75v

 

Was going to increase the precharge after doing quick boot / test.

Any thoughts – or have I bought dud set of RAM.

 

D:-)

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Ram guy - thanx; thats a fantastic service.

Would this still apply for a module no longer in production.

 

I will give the RAM another try using the autodetect and different slots.

Maybe this may force the board to recognise the change - worth a shot.

 

D:-)

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Dear Ram Guy

 

Grateful if you would just double check what I am doing here.

 

I tried the TWINX2048-3200C2 modules again today – still no joy.

I changed the BIOS setting to SPD [serial Presence Detect] to auto detect /set the DRAM clocks.

I also dropped the voltage to the stock 2.5v and tried the RAM in two different slots [following population rules].

I was hoping this would force the MOBO to recognise the change.

Alas it didn’t work, it just sat there in POST mode [& so did I].

 

I had a look at [current] RAM and noticed it was slightly different spec -

CMX256A-3500C2PT XMS 3500 256MB 433MHZ CL2.

 

My replacement modules are –

2GB TwinX CMX1024-3200PT XMS 1024MB 400MHZ

 

The MOBO is an MSI 865PE Neo2 FIS2R; does this make sense

Thanks – confused D.

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  • 2 weeks later...

Ram Guy

 

You asked "Were these the modules from the RMA".

What were you thinking.

 

I would really like to know if I have the correct MOBO/Ram combination of

2GB TwinX CMX1024-3200PT XMS 1024MB 400MHZ

& MSI 865PE Neo2 FIS2R.

Then at least I can rule out mis-match as the problem.

 

Thanks D:-)

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