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RAM Compatibility problems

Recently i upgraded my system RAM to 1GB (512*2MB  DIMM of DDR Ram 333 MHz). As soon as i upgraded i found out that my system is not behaving properly like (there was no display, the intel logo at the start up appers to be grabbed), i replaced them with the new DIMMS but again after few days the system started malfunctioning, so i got my older ram back into place which is 256 MB (128*2MB DIMM of DDR Ram 333 MHz) and now my system is working fine...I will list out my PC configuration

1. CPU - 1.70 GHz
2. 256 MB DDR RAM (the problem area :-(
3. Intel 845 GBV motherboard.
4. 40 GB HDD, DVD-Writer, FDD

I have checked all the docs related to my MBD (the doc says that my MBD supports 2 GB MAx RAM of DDR type) but i don't know why RAMs are misbehaving, its quite strange. Its been a month and I have replaced the new RAM thrice but to no use and i am quite sure the new RAM DIMMs don't have ne problems...

Ne Ideas.....

thanks
rinks
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rinksno1
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rinksno1
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1 Solution
 
MarkCommented:
It may be a problem with the density of the ram chips on the modules. Do you have any specs on the  new ram. The Intel site mentions that this board is designed to accept 512Mb density ram chips but also says it hasn't been tested.

Also check in the bios for memory settings  that are set manually. It would be preferably to set them to auto, this way the bios can access the SPD chip on the ram and set it up properly.
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CallandorCommented:
You should check the memory configurator on www.crucial.com to see what modules are compatible with your motherboard.  You may also have bad memory slots, so check the memory on the slot that you know was working.
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PCBONEZCommented:
This board requires low density memory modules.
32 M x 8 type chips with 16 chips on the module for a 512MB module.
Low density memory is more expensive so if you 'got a deal' you probably got the wrong memory.

http://developer.intel.com/design/motherbd/bv/bv_mem.htm

http://www.directron.com/faqi845gbv.html#5.0

PCBONEZ
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rinksno1Author Commented:
I have checked the new memory and it is double sided and consists of 8 chips on each side (2 sides * 8 nos of chips* 32M = 512M ) doesn't it means that the new momory is of low density?
I have already checked out the above sites (before putting the ques in EE), and now i am thinking that i have to go and buy the listed chips that were supported (i.e. Nanya, Samsung etc).

I check out the chip pics through the following site...
http://www.cmtlabs.com/mbCertPartSearchResults.asp?sManuf=Intel&bNav=True&sMN=D845GBV%2FD845GRG&oSubmit=Search

thanks
rinks
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MarkCommented:
The memory seems to be of 256megabit density so it should work.Can you get the computer to start up with the 512mB modules,to a bootable cd, like ultimate boot cd.?  http://www.ultimatebootcd.com/
It has memtest on it and this would be the time to test the ram if it boots with this cd..
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brd24gorCommented:
Have you tried one stick at a time to see if in fact one of the new sticks is the problem?
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PCBONEZCommented:
What is the -exact- memory you already have?
Make/model?

Do you have your BIOS configured to set the memory timings by SPD?

PCBONEZ
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rinksno1Author Commented:
I have checked all the setting in bios and it seems to be perfect...(like most of the settings are already set to auto mode..) currently i have nanya chipset based memory (the 256 MB memory(2*128MB) i am not able find out the chip maker of the new ram...but the symbol in the chipset says TA... ) and moreover i have tried all the possible permut. and combinations for the new sticks but to no use i will be taking my system to the vendor this saturday and lets see what happens...ne ways i am giving the points to "PCBONEZ" and will post the story of "me and my RAM" after saturday, when everythin was done... :-)

thanks guys.

rinks
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