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SGINERD
Joined: 14 Feb 2010
Posts: 57
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 Posted: Sun Feb 14, 2010 2:52 pm Post subject: MMC2 CPU module upgrade via CPU desolder/swap |
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At this point a thought in my mind. I have some military stuff that uses the
MMC2 module at 600mhz. I can find the 850mhz units but cost versus increase is not that attractive.
I have removed the heat sink plate and find a micro-pga2 cpu under it with a
100mhz FSB. In my collection I have some SL53s 1Ghz micro-pga2 cpu's that will go right in place of the 600mhz chip.
The question is if anyone knows were I can get this swap done. I do alot of de-soldering, but to risk alot of scrape parts want to keep that as a last resort.
Any tips would be appreciated. |
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D.8080
Joined: 03 Apr 2006
Posts: 1474
Location: Italy
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| Posted: Sun Feb 14, 2010 3:02 pm Post subject: |
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Could you please post some pics?
Thanks! |
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SGINERD
Joined: 14 Feb 2010
Posts: 57
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Mixeur
Joined: 06 Jan 2005
Posts: 4038
Location: Sochaux, France
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Guest
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| Posted: Mon Feb 15, 2010 4:01 am Post subject: |
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| Not to disagree with you but the pin config is the same. The only difference is that the Micro-pga2 has a kind of adapter board on it that can be removed, then the chips are identical. |
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Guest
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| Posted: Mon Feb 15, 2010 4:51 am Post subject: |
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Then try to desolder and resolder the cpu on the card 
Failure due to the nature of the bga "socket" is high. Be careful.
Good luck! |
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SGINERD
Joined: 14 Feb 2010
Posts: 57
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| Posted: Mon Feb 15, 2010 11:09 am Post subject: |
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Thats correct. When I remove the light green board attached to the Micro-PGA2 cpu, its the same as a 495-Ball cpu. Thats why I am confident the swap will work. The only trouble I have is the resolder work, if I get impatient I will give a go but I just don't want to risk this with a heatgun.
So if anyone knows were I can get the job done, please let me know. I am located in The Netherlands ( Europe )
Cheers, SGINERD |
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Mixeur
Joined: 06 Jan 2005
Posts: 4038
Location: Sochaux, France
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| Posted: Mon Feb 15, 2010 11:48 am Post subject: |
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Theorically, swap is possible yes.
Pratically, it will be really hard without a special desolder equipement, a reballer equipment, and then an equipment to resolder the reballed chip on the MMC PCB (oven for example).
With a heatgun, you will damage the MMC PCB and or the µPGA2 cpu.
That's why I said it was not upgradeable.
To manage to do this, you have to find some electronics company specialized in BGA chips rework.
Good luck.
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SGINERD
Joined: 14 Feb 2010
Posts: 57
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| Posted: Mon Feb 15, 2010 1:17 pm Post subject: |
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Thanks, I have been doing some research for companies but have not come up with much yet. I have like 10 of these units I want to upgrade so I hope I can find a place to do the work. It's not worth my time or money to TRY this at home!
But if it works I will have the only 1Ghz MMC2 modules.
Cheers, SGINERD |
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SGINERD
Joined: 14 Feb 2010
Posts: 57
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| Posted: Tue Feb 16, 2010 3:30 am Post subject: |
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I just got a batch of 850mhz MMC2's for a sweat deal. Now the mod can begin. Got some quotes on the re-solder work coming in and will post the progress as soon as it gets underway.
Cheers, SGINERD |
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xrror
Joined: 23 Jan 2010
Posts: 83
Location: 61920-2262
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| Posted: Tue Feb 16, 2010 4:35 am Post subject: |
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If you, or you find someone who will do BGA rework for cheap... 
You'll be my new best friend! I'd give some organs to have a rework station... |
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SGINERD
Joined: 14 Feb 2010
Posts: 57
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| Posted: Tue Feb 16, 2010 4:54 am Post subject: |
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 I'm on it. No organs needed.
Cheers, SGINERD |
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SGINERD
Joined: 14 Feb 2010
Posts: 57
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| Posted: Thu Feb 18, 2010 7:05 am Post subject: |
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Well I got some prices for the swap to a 1Ghz chip. Also checking on putting a socket on the module so I can try out different CPU/Ram configs and do
some benchmark tests.
Want to wait a reply from Friendtech ( the Xbox 733 to 1.4 mod people ) and
see what they have to say.
Will post more when I know more.
SGINERD |
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SGINERD
Joined: 14 Feb 2010
Posts: 57
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| Posted: Thu Feb 18, 2010 7:06 am Post subject: |
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| xrror wrote: | If you, or you find someone who will do BGA rework for cheap...
You'll be my new best friend! I'd give some organs to have a rework station... |
The prices at this point for a reball and swap are 120-175 euro's |
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SGINERD
Joined: 14 Feb 2010
Posts: 57
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| Posted: Thu Feb 18, 2010 11:20 am Post subject: |
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Found the SL5TB cpu's via some chinese mafia on-line. He has like 200 of them so I want to wait a reply. These are the CPU's with the balls on them, that way I don't have to remove the bottom plate and reball the Micro-PGA cpu's. At this point I am just going to try to do the work myself, got some tools coming from Ebay and if all else fails I can always pay the money to have it done. But I want to give it try, it does not look to difficult but these my be my famous last words.
Will keep ja posted.
SGINERD |
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