All about memory - Revision history

Kevin.Williams at 20:19, 18 April 2014

2014-04-18T20:19:11Z

2014-04-16T22:39:34Z

2013-07-23T22:54:09Z

2013-07-23T22:44:06Z

2013-07-23T22:36:04Z

2013-07-19T00:25:26Z

2013-07-18T23:53:22Z

2010-01-27T21:47:28Z

remove dup SDRAM

2009-08-22T20:55:32Z

2009-08-22T20:10:30Z

← Older revision		Revision as of 20:19, 18 April 2014
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−	{{~~migrate~~}}	+	{{migrated}}
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		+	[https://docs.google.com/a/freegeek.org/document/d/1wBtq7CAWtJ9gD1GyYWBfB_6SapN6yUX83diBE_G1yP8/edit?usp=sharing Link]
		+
	'''OBJECTIVE''' To enable the builder to recognize and install memory sticks on the motherboard		'''OBJECTIVE''' To enable the builder to recognize and install memory sticks on the motherboard

← Older revision		Revision as of 22:39, 16 April 2014
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		+	{{migrate}}
	'''OBJECTIVE''' To enable the builder to recognize and install memory sticks on the motherboard		'''OBJECTIVE''' To enable the builder to recognize and install memory sticks on the motherboard

@@ Line 34: / Line 34: @@
 === RAMBUS ===
 [[Image:RAMBUS.jpg]]
-A stick of RAMBUS has two notches in it at the center of the stick.<br>
+A stick of RAMBUS has two close together notches at the center of the stick with a very large gap of missing gold pins.<br>
 === SDRAM ===

@@ Line 25: / Line 25: @@
 [[Image:DDR2.jpg]]
-The newer DDR2 has a single notch that is slightly nearer the center of the stick, so it will not fit into a regular DDR slot. That notch also has symmetrical missing gold pins on either side, and 2 rounded notches on each side.<br>
+The newer DDR2 has a single notch that is slightly nearer the center of the stick, so it will not fit into a regular DDR slot. That notch also has symmetrical missing gold pins on either side. Like DDR, there are 2 rounded notches on the sides of the stick as well. <br>
 === DDR3 ===
@@ Line 31: / Line 31: @@
 [[Image:DDR3.jpg]]
-And the DDR3 stick also has a single notch on it that is slightly closer to the end than the DDR, with symmetrical missing gold pins. but square notches on the sides, as opposed to rounded ones. <br>
+The DDR3 stick also has a single notch on it that is slightly closer to the end than the DDR2, with symmetrical missing gold pins. On the sides, there are square notches as opposed to the rounded ones of DDR and DDR2. <br>
 === RAMBUS ===

@@ Line 18: / Line 18: @@
 [[Image:DDR1.jpg]]
-A stick of DDR has a single notch in it near the center of the stick.<br>
+A stick of DDR has a single notch in it near the center of the stick, with gold pins missing from one side more than the other, as well as 2 rounded notches on each side<br>
 ''Un módulo de DDR tiene una muesca en en el centro del módulo.''
 [[Image:DDR2.jpg]]
-The newer DDR2 has a single notch that is slightly nearer the center of the stick, so it will not fit into a regular DDR slot<br>
+The newer DDR2 has a single notch that is slightly nearer the center of the stick, so it will not fit into a regular DDR slot. That notch also has symmetrical missing gold pins on either side, and 2 rounded notches on each side.<br>
 [[Image:DDR3.jpg]]
-And the DDR3 stick also has a single notch on it that is slightly closer to the end than the DDR, and square notches on the sides, as opposed to rounded ones. <br>
+And the DDR3 stick also has a single notch on it that is slightly closer to the end than the DDR, with symmetrical missing gold pins. but square notches on the sides, as opposed to rounded ones. <br>
 === RAMBUS ===

@@ Line 14: / Line 14: @@
 '''Exercise'''
 Find the SIMM and DIMM slots on the motherboards on the example board in front of you so you can identify these slots.
 === DDR ===
@@ Line 48: / Line 40: @@
        [[Image:72-pin-simm.png]]
 pin SIMMs are 4.25 inches long.  The holes and notches need to match exactly since there are other objects that look like 72-pin SIMM but aren't, so see points A (side holes), B (center notch) and C (side notch) in the picture.

← Older revision		Revision as of 20:55, 22 August 2009
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	[[Image:30-pin-simm.png]]		[[Image:30-pin-simm.png]]

		+	30-pin SIMMs are 3.5 inches long. These are the oldest types of memory we still see on a regular basis in System Evaluation. Note that they do not have a center notch.

@@ Line 45: / Line 45: @@
 ''Un módulo de SDRAM tiene dos muescas, una cerca del centro del módulo, y otra cerca a un extremo del módulo.''
        [[Image:72-pin-simm.png]]
@@ Line 51: / Line 52: @@
 pin SIMMs are 4.25 inches long.  The holes and notches need to match exactly since there are other objects that look like 72-pin SIMM but aren't, so see points A (side holes), B (center notch) and C (side notch) in the picture.
 Pin SIMM
 [[Image:30-pin-simm.png]]
 '''Exercise 1:'''