A dual inline memory module (DIMM) consists of a number of memory components (usually black) that are attached to a printed circuit board (usually green). The gold pins on the bottom of the DIMM provide a connection between the module and a socket on a larger printed circuit board. The pins on the front and back of a DIMM are not connected to each other.
184-pin DIMMs are used to provide DDR SDRAM memory for desktop computers. Standard 184-pin DIMMs are available in PC1600 DDR SDRAM, PC2100 DDR SDRAM, PC2700 DDR SDRAM, and PC3200 DDR SDRAM.
To use DDR memory, your system motherboard must have 184-pin DIMM slots and a DDR-enabled chipset. A DDR SDRAM DIMM will not fit into a standard SDRAM DIMM socket. (Information about which memory technology your system uses is included in the Crucial Memory Advisor™ tool.)
The number of black components on a 184-pin DIMM can vary, but it always has 92 pins on the front and 92 pins on the back, for a total of 184. 184-pin DIMMs are approximately 5.25 inches long and 1.25 inches high, though the heights can vary. While 184-pin DIMMs and 168-pin DIMMs are approximately the same size, 184-pin DIMMs have only one notch within the row of pins.
August of 2013, a friend at church gave me this Compaq Presario 2004 desktop computer. He and his wife have moved to Minnesota and I have lost contact so cannot ask them. It only came with 256 Mb and the other slot is empty. A friend in Austrailia (I am in Atlanta, Georgia USA); also has an XP computer desktop but not the same brand. He shipped me 2 x 1 Gig and 2 x 2 Gig memory cards this past Wednesday. Will take 10-12 days to get to me. Do the memory cards have to be specific for my computer or will others work? Can I only put just 256 Mb more in the other slot? I am 64 (almost 65) and have never been inside a computer tower. A friend in my building will put the memory in for me. I am confused on how much Mb is 1 Gig and how much is 2? Here is the scan results for my computer: Crucial USA - scan results
1. Ran the scan on desktop pc at crucial.com
Maximum memory: 8192MB
Slots: 2 (2 banks of 1)
*Not to exceed manufacturer supported memory.
Although the memory can be installed one module at a time, the best performance comes from using matched pairs of modules.
2. Existing memory is 2 GB - occupies one of the two memory slots
3. Purchased 2 x 2GB Crucial 4GB Kit from Amazon -
4. Both memory slots filled - memory is read on boot up but......
5. Unfortunately the new memory does not work????? Put existing 2GB memory module back in slot.
Thanks for your help,
In most cases the RAM is the same, but there are cases where it is not. It can really depend on the system. It's always best to purchase RAM that is guaranteed to be compatible with your system.
Please let us know if there is anything else we can help you with.
I purchased CT51264BF160BJ new from Amazon few months ago which seemed to have normal package/sticker and runs okay.
However, MemTest86 identifies it as Super Talent CT51264BF160BJ.M8F in the PC (JEDEC SPD 1.0).
Does this make sense - was there some temporary issue in manufacturing week 7 of 2014 where Crucial programmed Super Talent's info (module rev x4444, mfg loc 5)?
My more recent purchase of CT51264BF160BJ from NewEgg shows SPD 1.1 with reasonable Crucial info.
Both SODIMMs have the same number of micron chips but the recent chips are slightly smaller.