Sometimes the user of a personal computer needs to determine the type of RAM that is in his computer or lies in front of him, i.e. determine by appearance. This can be done with simple analysis.
It is necessary
RAM bar
Instructions
Step 1
At the moment, there are several types of memory that are actively used in the assembly of computers to this day: DDR3, DDR2, DDR, DIMM and SIMM. Immediately it is worth making a reservation that the last 2 types of memory are still used in system units, but such rarities have not been bought for a long time.
Step 2
SIMM. A bar of this type of memory is designed for 30 contacts. Scope of application - computers using processors of the 286, 386 and 486 series. There is also a version - SIMM for 72 contacts, which came with the 486 series and Pentium-I processors.
Step 3
DIMM. This type of memory is just another name for the more well-known type of SDRAM. DIMMs became the basis for Intel Pentium processors and were actively released until 2001. If the SIMM has only one groove, like other modern cards, then the DIMM already contains 2 grooves on the contact track. This is the only significant difference in appearance.
Step 4
DDR came after SDRAM and became its successor. The first appearance is dated 2001. The innovation of this type of memory consisted in the double transfer of data in one cycle. From the outward appearance it becomes clear that with the advent of new models of memory sticks, the number of contacts increases significantly. For DDR memory, this value is 184.
Step 5
DDR2 is an enhanced version of DDR. The main innovation is a double increase in the data transfer rate per clock cycle. When examining DDR2 memory, pay attention to the strip of contacts, their number is equal to 240.
Step 6
DDR3. Outwardly, this model will be quite difficult to distinguish from the model of the previous series, this is due to the similarity of the contact arrangement. However, the same number of contacts does not make them electronic counterparts. The only sign by which you can distinguish one memory from another is the direction of the groove on the contact line. If the groove faces the microcircuit, this strip contains DDR3, otherwise DDR2.
