fzia@rodan.acs.syr.edu (Farrukh Zia) (03/05/91)
A simple question from a naive person. What does SIMM and SIPP stand for and whats the difference. All I know is that they are RAM modules. Thanks. -- Farrukh Zia fzia@rodan.acs.syr.edu
ardai@teda.UUCP (Mike Ardai) (03/05/91)
In article <1991Mar4.164609.3988@rodan.acs.syr.edu> fzia@rodan.acs.syr.edu (Farrukh Zia) writes: >What does SIMM and SIPP stand for and whats the difference. In order to save space, most systems now use SIMMs or SIPs for their memory. These are small PC boards (about 3/4" by 4") with RAM chips (usually 8 or 9 surface mount) on them. SIMMs (Single in-line memory modules) have an edge connector (like on regular expansion cars) that plug into a special socket. SIPs (Single in-line pinned, sometimes spelled SIPPs) are SIMMS with pins soldered to the edge connector. These plug into sockets that look like one half of an IC socket. /mike -- \|/ Michael L. Ardai Teradyne EDA East --- ------------------------------------------------------------------------- /|\ ...!sun!teda!ardai (preferred) or ardai@bu-pub.bu.edu
IO10391@MAINE.BITNET (Michael W. Picher) (03/06/91)
SIMM = Single In-line Memory Module SIPP = Single In-line Pin Package (or Signle In-line Package) Mike -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Michael W. Picher, VP Internet: io10391@maine.maine.edu LexIkon Microsystems, Inc. Genie: MPICHER 333 Water Street Augusta, Maine 04330 207-623-4012
lam@hyper.hyper.com (Edmund C. Lam) (03/08/91)
Most PC motherboards take SIMM or SIPPs. SIMM and SIPPs are identical
with SIPPS have soldered pins. This makes motherboards supporting
SIPPS cheaper (i.e., a row of machined socketed pins is cheaper than
a SIMM row socket).
While the majority of memory modules are of the 'x 9' or 'x 8', some
motherboard manufacturers also support 'x 4+4 + parity'. This modules
come in 256K or 512K blocks. In the case of the 256K module, 2 256K x 4 plus
1 256K x 1 DIPS are soldered on a PC board which can be mate to a SIMM
socket. The 512K module uses 4 256K x 4 and 2 256K x 1.
This style of DRAM seems to be popular with the clone motherboards from R.O.C.,
(DTK 2030 and 2530, BioStar MB1325's etc...). I know that this style of
memory is being phased out. The new DTK 2530's will only accept 'x 9'
memory.
N.B. the 'x 4+4 + parity' is my own notation.
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