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Thread: DDR2 Memory in DDR Slot
July 7th, 2009, 04:54 PM #41
sorry i know this is a slightly old thread but i would just like to say to anyone buying new/more RAM,
TAKE THE OLD RAM TO THE STORE WHEN PURCHASING or if buying online remove the old ram and take note of all the numbers on the label,
i'm sure when searching you will see a number similar to what you have written down even a complete novice can see if 2 sets of numbers look the samethere's someone in my head but its not me
July 11th, 2009, 05:58 PM #42
My two cents...
A) Pin Outs
Initially i thought i best to take a quick look at the pin out diagrams as below:
DDR Memory Pinout Designations:
DDR SDRAM DIMM 184 Pin Connector Pinout - AllPinouts
DDR2 Memory Pinout Designations:
DDR2 SDRAM DIMM 240 pin Connector Pinout - AllPinouts
After considering the amount of different type of pins supply, input, outputs & input/outputs i find it against all the odds that the two types of memory are interchangeable, for example if you had a +ve supply pin on a RAM socket touching just one of the ground pins on a module that would be enough to mess things up IMO.
DDR RAM operates at a nominal 2.5 Volts (1) whereas DDR2 operates at a nominal 1.8 Volts(2). That some pretty hefty over volting or under volting, whichever way you look at it, for anyone putting RAM into slots they shouldn't.
(1) DDR SDRAM - Wikipedia, the free encyclopedia In the big table.
(2) DDR2 SDRAM - Wikipedia, the free encyclopedia In the overview bit.
C) I just doesn't Fit
Somewhere years ago in an executive meeting someone said...
"A good idea would be to make it impossible for people who aren't absolute morons to put these shiny new DDR2 memory sticks into their dirty old DDR slots"
The heavens opened and God said "It shall be done"
and so the story goes and the notch on DDR2 DIMMs was located in a different position from DDR DIMMs.
D) Prove It, No Really Prove it.
E) Special Laptop Considerations
Pinouts for DDR SO DIMM:
200 pin SO-DIMM DDR - HwB
Pinouts again DDR2 SO DIMM:
200 pin SO-DIMM DDR2 - HwB
Assuming (i do think this is fair assumption) that VDD is the supply voltage and that VSS is the ground designation as determined from the previously linked in pin outs in section A) then go down both lists linked above not very far and notice pins 9 & 21 for starters, not good news for compatibility.
I think a fair yet queer analogy to bring up in this case is terrorism, bear with me :-). It only takes ONE bad thing to happen for example planting a bomb in a large building etc. (wrong pins touching) for the proverbial to hit the fan big time to devastating effect (building collapses kills 100's / RAM is wrecked & maybe the motherboard too).
So yeh that was long for me"I hope you leave enough room for my fist because I'm going to ram it into your stomach and break your god-damn spine! "
December 2nd, 2010, 01:26 PM #43
- Join Date
- Dec 2010
You smoked the Mobo dude.
Yes, DDR2 will fit in the DDR slot!!!!!!!!!!!!! And yes the DDR2 memory is not compatible with the DDR Mobo. Something on the Mobo fried and you will need a new Mobo and Processor to resore to working condition. Replace with same Part numbers and you will not need to update any drivers for it to work again. Change the Mobo specs and it will not boot until drivers are updated.
December 2nd, 2010, 03:29 PM #44
Again for the umpteenth Millionth Time, IT WILL NOT FIT!!! Unless its been forced in, that does not count anyways, its like trying to take a square peg and fit it into a round hole, using a sledge hammer.
DDR's contacts/fingers are a different number than DDR2 (unless its Laptop DDR/DDR2, otherwise for Desktops its completely incompatible, as there's 184 pins for DDR, 240 for DDR2 and DDR3, and the divider notch is in a different location for all three), but even then, the Voltages are different.
Just Spent the Last Half Hour Putting this together, hoping it will sink in with some... But I'm sure there are some Tools out there that will continually insist that it does fit and is compatible.
LARGE IMAGE (4.7MB 1600x4800 Pixel JPEG)
(Image is Resized for Forums, but here's full size Pic link: http://i10.photobucket.com/albums/a1...KINDDRSLOT.jpg )
Unless it is a Laptop or some sort of Mini ITX or similar form factor Motherboard that uses Laptop memory, as far as Desktop goes DDR2 WILL NOT FIT INTO DDR SLOTS...
Unless someone is using some sort of "Modified" motherboard or some off brand/crap brand el cheapo that has the divider removed.... Or They Are using Mislabeled RAM... Its NOT Possible.
A Picture Is Worth A Thousand Words?
How about 4 of them in one image?
Ok, maybe not a Thousand or Four Thousand Words, but this just goes to prove what we've all been saying for some time now.
If You Continue to Believe it is Possible, then Back it up, show us the proof.
December 2nd, 2010, 06:34 PM #45
- Join Date
- Dec 2010
DDR 2 can fit enough to destroy Mobo!!!!!!!!!!!!
OK, DDR 2 does not fit properly in a DDR slot, however, when I put it in my DDR Computer, it seemed to fit as it poped in place and the end clips came up to fit in side slots. It appeard to fit. Upon closer look, it noticed that RAM was not seated properly and was sitting a little at an angle becasue it was not propery fitted. THis was enough of a fit to cuase the Mobo to smoke and be distroyed.
SOOOOOOO...... DDR 2 can fit (somewhat) enough to destoy the Mobo. I know I did it twice on two different Mobos before I discovered I had the wrong memory. Hard to see bad fit when Mobo is installed in Case.
June 2nd, 2011, 12:32 AM #46
- Join Date
- Jun 2011
June 2nd, 2011, 12:36 AM #47
May 5th, 2012, 04:37 PM #48
- Join Date
- May 2012
May 6th, 2012, 12:20 AM #49
If you are even remotely reading (or competent) what....
Oh here we go again, Why the F can't anyone read the damn thread? (besides just let it die already)
READ THE DAMN THREAD before calling us out on it.
The original posters specs were posted and it CLEARLY shows its a Freaking Desktop, which DOES NOT use laptop memory. (Hell it was posted in the reply prior to the one you quoted)
So before calling us out on things in the future, read the damn thread before posting, Unless you like looking like an ass, then by all means go at it.
The topic is DESKTOP RAM plain and simple, Not Laptop. The never even mention laptop RAM at all in the posts.
and has been said, YOU CAN NOT use standard DDR and DDR2 in the same slots.
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