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I want to upgrade my laptop which has T5250 CPU with a T5600 CPU to support virtualization. I ordered T5600 on ebay, but it didn't fit. It says T5250 supports PPGA478 socket, so I assume that is what I have. T5600 says supports "PBGA479, PPGA478".

Since T5600 didn't fit as a replacement, I assume it means there are 2 models of T5600, one supports PBGA479, another one supports PPGA478, and not like I thought - one CPU supports both. Is that a correct statement?

Does anybody know if it's even possible to do such an upgrade, or I'm wasting time?

UPDATE: I found a cheaper and better upgrade for my laptop: T7250

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Yes, Same inside guts with different exterior packaging. The intel spec page lists the CPU with different part numbers for each socket type. And this wikipedia page explains a bit of the reason for how the 479 pin socket arrived on the same CPU platform.

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thanks for confirmation and extra info –  galets Jun 29 '12 at 16:19
    
The part number indicates it is SL9U3, shich should also be PPGA478 socket, but nevertheless it doesn't match mine. Any ideas why?.. –  galets Jun 29 '12 at 23:10
    
Yes, from that chart, it looks like the SL9U7 would be the 479 pin version, and that the SL9U3 is the 478 pin. Is it possible one pin is slightly bent? The T5250 looks like it only comes in 478 pins, so your socket must need that type. The difference between 478/479 is that one extra pin. The 479 wikipedia page shows a closeup of the pins for both 478/479. Which looks like your cpu and socket? And sanity check - the cpu is aligned correctly? (sorry, had to ask). –  jdh Jun 30 '12 at 0:00
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Yeah, seems to be different pin layout. Here is the CPU I originally had in laptop, and its pin layout. Here is the pin layout of the SL9U3 T5600 I bought. –  galets Jul 2 '12 at 2:46
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Those photos helped this confusing issue. Apparently Intel uses the term "socket" to refer both to the physical pin number and also the pin electronic layout. So the spec chart for T5600 shows it as physical pin 478 (and 479), but electronical "Socket M" Their spec page shows T5250 is also physical socket 478, but electronic "socket P". Sadly, sockets P and M can't be hacked to be converted (like the Asus 479 to 478 conversion kit did [CT-479]). –  jdh Jul 2 '12 at 12:12

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