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Author Topic: Micron Ddr Sdram  (Read 83 times)

run088

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Micron Ddr Sdram
« on: August 02, 2008, 05:03:00 AM »
I know that Micron was the first company to sign on making xbox ram.I have never seen it personally but I have read a little bit about it.
In this link it talks about how micron made the ram upgradable

http://eetimes.eu/semi/18305201

So I did a little research about the specific chip that was used and could not find any good info.Then I looked up the specks on the samsung ram.Found out a couple of things that made it special cross-referanced that and got some hits on the micron line of chip with the same charteristics.Double checked for the specs of the sizes and everything seems to match up.Then I searched threw micron's lines and found the line of chip and specs.What I  found was that the chip also was made in 32 and 64 as well as smaller sizes than the normal xbox 16.

Are the marking letters of the xboxes that are equiped with the micron ram's ram# MT46V2M32.

If so will micron's chips of this line of the bigger sizes work?

If it will not work on hacked bios what about linux?

Capboy is the only one that has one I have seen.For those of you that might think I am crazy here is the link.
'It is what gave me the idea"


http://forums.xbox-s...p;#entry4287258


Here is a link on the ram info for micron

http://pdf1.alldatas.../MT46V4M32.html

here is one for samsung

http://pdf1.alldatas...3238M-QC50.html


Here is one that is about that line of micron chip

http://www.yjfy.com/.......2 DDR SDRAM


After you all look what do you think?

If someone cant give me a reason why it aint going to work I am going to attempt it if I can find the parts.

If they will work how sweet would it be to have a 256mg or 512mg of ram  xbox!
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Bomb Bloke

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Micron Ddr Sdram
« Reply #1 on: August 02, 2008, 07:22:00 AM »
Whether or not a BIOS could be made to support higher amounts, I dunno, but I highely doubt the ones we have currently will work. I'm not a technical expert but I expect it hinges on whether the motherboard can support the new chips (and then on whether someone with the knowledge/inclination can be found to do the coding).

It wouldn't surprise me if Cromwell supports any amount of RAM you can throw at it, but it also wouldn't surprise me if it doesn't.
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run088

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Micron Ddr Sdram
« Reply #2 on: August 02, 2008, 07:35:00 AM »
Are those not the same chips as in the debug xbox you think?
How did they code it for the 128mg?
I am going to post this in the xbmc site as well as maybe kick it around to some guys on the nix forum here if you think a coder could give a more technical aspect.
Even if it only worked on linux thats where it would benefit most there and emulation.
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nick14

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Micron Ddr Sdram
« Reply #3 on: August 02, 2008, 11:21:00 AM »
there is a 128mb that they made samsung and you can still buy it but you need to mod your xbox to recongize it and it cost much more $80 and micron made 256mb for 1.0 -1.5 but they never when on sale
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run088

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Micron Ddr Sdram
« Reply #4 on: August 02, 2008, 03:18:00 PM »
You got links to the info you got?
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Mikesshunk

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Micron Ddr Sdram
« Reply #5 on: August 03, 2008, 01:40:00 PM »
It said in the article that they also tested RDRAM, so I wonder if there is a system or two out there that has that type of RAM in it.
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zefrench

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Micron Ddr Sdram
« Reply #6 on: February 16, 2011, 08:02:00 PM »
Very interesting information, so since we can guess from the xbox propotype that the xbox can support  8 x 64 Mbits Micron RAM chips ( the MT46V2M32 ) the xbox supports chips of various size.  Thus perhaps it can support largers chips.  I am willing to test it, but we need to source such chips first.

So the requirements are for a TQFP (also called LQFP) 100 pins GDDR with an organisation of 256Mbits (or larger) x 32 in banks of 4, in addition to other settings such as voltage etc, but we need a starting point before looking in details at datasheets.

So far we have known reports of the following chips:
  • 512Kbits, Micron MT46V2M32V1
  • 128Mbits, Samsung K4D263238D-QC50
  • 128Mbits, Samsung K4D263238F-QC50 128Mbits
  • 128Mbits, Samsung K4D263238M-QC50
  • 128Mbits, Hynix HY5DU283222AQ-5

These should work according to their datasheets:
  • 128Mbits, Micron MT46V4M32
  • 128Mbits, Samsung K4D263238I-UC50
  • 128Mbits, Samsung K4D263238K-UC50


If I make up a part number for Samsung it would be the following which I am not getting any hits on.
K4D553238_-QC (with lead) or k4d553238_-UC (lead free)
Samsung's product guide

Hynix does not appear to have made such a thing either:
Hynix chip EOL list



Anyoen know any other manufactureers that made GDDR RAM chips ?  It would be interesting to read off GDDR chips from old Video cards that might be a new source
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