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A question about memory

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I am replacing the motherboard in a 4 year old system. The old mobo is an intel D845HV and has 1 256mb PC133 SDRAM module.

Can I use this ram in the new mobo? Its an Intel D865PERL that uses PC 2100 DDR SDRAM.

It doesn’t matter if the memory runs slower than possible with the new board, as I am installing the old 1.5 GHZ cpu on the new board too.

Regards
Greg

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If the MOBO says it uses PC2100 DDR SDRAM than that’s what you have to use unfortunely. I am looking at the manufacturer’s website and your CPU is not listed as being supported. You may want to check out the specs on the MOBO. Here’s the link where I found my info. http://www.intel.com/design/motherbd/rl/rl_proc.htm

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Poster rated this answer.
Hello: Thanks for your help!

Greg

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Your PC 133 SDRAM is 168PIN,PC 2100 DDR is 184 PIN.The 133 will not work in a 184 slot.

HOpe this helps.

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Poster rated this answer.
Hello: Thanks for your help!

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Hi Greg,

As the second answer states, you cannot install PC133 SDRAM in a motherboard designed for DDR RAM.

While the DIMMs are the same physical size, you will notice 2 physical differences.
First, is the pin count.
Second, they have different notches on the socket edge to prevent you from installing the wrong style of DIMM in the wrong socket.

Next, you need to answer one question before choosing RAM for this motherboard.

Which specific Intel CPU are you going to use?

According to the supported CPU page at Intel’s site, (answer 1) this motherboard does NOT support the existing 1.5GHz CPU.
Further, is the old CPU a socket 423 or 478?
You can’t swap CPU types between sockets.

Intel list a number of 1.5GHz CPUs. Most are socket 423.

http://processorfinder.intel.com/scripts/list.asp?ProcFam=483&NoNav=NO&CorSpd=4999&SysBusSpd=ALL&MfgTech=ALL&step=ALL&cache=ALL&PkgType=ALL&btnFOS=Filter+on+selections

This motherboard supports:

“Four 184-pin DDR SDRAM DIMM sockets
Support for DDR 400, DDR 333, and DDR 266
Support for up to 4 GB of system memory”

DDR 266 is for only the 400 MHz FSB

DDR 333 is for 533 MHz FSB

DDR 400 is for 400 MHz FSB.

Since the motherboard does support a 400 MHz FSB, you might get lucky if you have a socket 478 CPU.

Chas

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Hi Chas

Your answer just just what I was lookin’ for. I ended up ordering a new cpu and ram for the mobo.

Greg

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