Thinkpad R40 DDR400 problem

[R3deye]

Hello, I`m a fresh noob to this forum so please bear with me.

I thought of upgrading the RAM in my Thinkpad R40. There´s allready one 512MB PC2100 module, and I bought a takeMS 512MB DDR400 module, as the older (PC2100 & 2700) modules are hard to find.
But after I installed it, the system is beeping 1,3,3,1 short beeps to indicate DIMM problem (as stated at Lenovo site).


Processor Mobile Intel Pentium 4M, 2000 MHz (5 x 400)
MB IBM 2681HTG
Chipset Intel Brookdale i845MP
System memory 512 MB (DDR SDRAM)
BIOS Phoenix (06/29/06)

The memory voltage cannot be set from the BIOS as there´s no option to control it.

Here´s the info on the existing module:

Module name Hyundai HYMD564M646A6-J
Serial no. 1C1F811Fh
Module capacity 512 MB (2 rows, 4 banks)
Mem. module type Unbuffered
Mem. type DDR SDRAM
PC2700 (166 MHz)
?irina modula (bit) 64 bit
Memory voltage SSTL 2.5
ECC Nema
Brzina osvje?avanja Skraæeno (7.8 us), Self-Refresh
Max CAS latency 2.5 (6.0 ns @ 166 MHz)
2. Max CAS latency 2.0 (7.5 ns @ 133 MHz)

Any help appreciated.

 

[corkyg]

My guess is that the pair of SODIMMs in that model Thinkpad ought to be the same.

However, in your specs it sates that the capacity is 512 MB. You are exceeding that.

 

[xSauronx]

Originally posted by: corkyg
My guess is that the pair of SODIMMs in that model Thinkpad ought to be the same.

However, in your specs it sates that the capacity is 512 MB. You are exceeding that.

seems odd that the R series would top at 512mb, if thats what youre thinking. my t40 has 1.5gb

maybe the new ram is dead? remove the original (its not hard) and try just the new bit in there

 

[R3deye]

However, in your specs it sates that the capacity is 512 MB. You are exceeding that.

That is the existing module capacity. The Lenovo site states a maximum of 1GB for this model.

remove the original (its not hard) and try just the new bit in there

I already did that, same thing.
At "takeMS" site I found the info on DDR400 modules, saying 2,6V is needed. My system outputs 2,5V at present (at least that´s what I gathered from AIDA´s report about my existing module) and I have no means to control the voltage from the BIOS settings.

 

[DaveSimmons]

Did you use a TakeMS memory selector to pick the RAM? If not, you're probably out of luck and need to pay any restocking fee 🙁

Try the memory selectors at Kingston.com and Crucial.com to find RAM that's guaranteed to work, pick whichever is cheaper after shipping is added.

 

[corkyg]

OK - you need a SODIMM that works at 2.5 v. Check out Dave Simmons' leads.

 

[alkemyst]

DDR400/PC3200 is not always compatible with PC2100/PC2700 slots...