• Product Title 4GB DDR2 800Mhz PC2-6400 240 Pin 1.8V Desktop Memory. Average rating: 1.5 out of 5 stars, based on 2 reviews 2 ratings Current Price $16.16 $ 16. 16 List List Price $45.84 $ 45.
• The two run on different power supply voltages. If you did manage to get a DDR2 ram into your DDR slot (and I'd be very surprised to find that they're keyed in a way that makes this physically possible) then your laptop's 2.5V DDR RAM power supply would toast your 1.8V DDR2 RAM.
• DDR2 SDRAM use 240-pin DIMM sockets for desktop computers. Each 240-pin DIMM provides a 64-bit data path (72-bit for ECC or registered modules), so they are installed one at a time in 64-bit systems. DDR2 chipsets are expected to support dual-channel memory, providing a 128-bit data path. 240-pin DIMMs are available in DDR2 or DDR3 SDRAM.
• Would it work to put 2gb ddr2 ram into a slot, that only support up to 1gb ram?? I have a sony vgn-c140g laptop that supports a max of 2gb ddr2 ram. Somewhere in the manuel, it said it only support a max of 1gb ddr2 ram per slot.

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Memory Module Pinouts

30 pin SIMM pin out
72 pin ECC SIMM pin out
72 pin SIMM pin out
72 pin SO DIMM pin out
144 pin SO DIMM pin out
144 pin SODIMM, EDO pin out
168 pin SDRAM DIMM(Unbuffered) Rear Side pin out
168 pin SDRAM DIMM(Unbuffered) Front-side pin out
168 pin SDRAM DIMM (Buffered) pin out
100 pin Unbuffered DIMM pinout
172 pin MicroDIMM pinout
184 pin Registered DIMM pinout
184 pin Unbuffered DIMM pinout
184 pin RDRAM RIMM pin out
200 pin SODIMM DDR pinout [SO-DIMM]
200 pin SODIMM DDR2 pinout [SO-DIMM]
214 pin Micro DIMM DDR2 pinout
240 pin Registered DIMM DDR2 pinout
240 pin Unbuffered DIMM DDR2 pinout
240 pin FB-DIMM pin out
244 pin Registered Mini-DIMM DDR2 pinout
244 pin Unbuffered Mini-DIMM DDR2 pinout

Note: 30-Pin memory modules which were replaced by 72-Pin memory modules are both obsolete. In fact SIMM memory modules were replaced by DIMM memory modules.

A friend has an older laptop which uses PC2100 DDR-266 200 pin SODIMM's. I have a P2-5300 DDR2-667 200 pin SODIMM left over from an upgrade.

It looks to me that both are keyed in the same spot on the RAM so I'm wondering if my DDR2-667 RAM would work in the DDR-266 slot.

I don't care that about the fact that this is like putting a car engine in a lawnmower, I just want to know definitively if it will work without damaging the RAM or laptop.

I'm not looking for guesses, I need a yes or no from someone that knows about RAM.

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Ddr2 Ram Slot Pinout Rj45

How about the make and model of that laptop.

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Speedwize it should be ok, it will just run at the lower speed, however i am not sure about it being a different type of DDR though. I dont think DDR2 work in pcs which are meant for DDR1

Ddr2 Ram Price

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Ddr2 Ram Amazon

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