Socket P CPU in Socket M

I've been looking at these datasheets:
http://download.intel.com/design/mobile/datashts/31407804.pdf
http://download.intel.com/design/mobile/datashts/31674505.pdf

And noticed there isn't much of a difference between the pinouts of socket M and socket P.

Would it be worth ripping a pin off my T7300 to try it in a notebook that is socket M?

 

Do you have money to throw away? If so, go right ahead. Technically, not all pins are required since a lot are just ground.

 

I don't need the T7300 but I would hate to kill the notebook.

 

I think there was one or two celeron processors that would fit in both socket M and socket P.

 

Can you tell me the name of one of those CPUs please?

 

dude try a t5250 i was surprised to find out they go for pocket change, 14.00 usd. also don't forget about the bios and chipset.

 

Ah, nevermind, sorry.

 

Pin mods are tricky, I'd be very careful of doing them unless you have the Intel Blueprints of the processor then by all means go right ahead and take out one of the not-so-important ones. In essence, if you perform the mod incorrectly, then there's a good chance you will probably end up frying your motherboard, processor and perhaps several other components.

 

....No, thats not really true. Have you ever fried your motherboard with a pinmod?

I've done some pinmods that were risky. I've stuck quads on the pm965 chipset with pinmods and all kind of crap. There really hasn't been any observable damage whatsoever.

I suppose if your laptop could still power on where most wouldn't, then it would be risky. With a quad on pm965, it wouldn't power on at all.

 

Any unlikely pin mods that did work? this is very interesting.

 

This has been my experience as well in installing stuff where it shouldn't go... never actually fried anything on the CPU or mobo side.

 

If you look at the pinout of socket M and socket P, they are mostly the same, but a few areas rearrange the pins used to make them electrically incompatible. But with BIOS support and using a dumb adapter that just reroutes some of the pins, there is no reason a socket P chip couldn't function in socket M and vice versa. The Celeron M 530 and Celeron 530 are both the same chip, just one for socket M and the other for socket P. In addition, on the desktop, all the chips of these generations use socket 775. There really isn't anything special about socket P versus socket M to make them incompatible aside from Intel juggling a few pins around to make them incompatible.

 

you know intel did something like this on socket 370 there was 380 FC-PGA and then FC-PGA2, FC-PGA2 was the all new tualatin P3. FC-PGA2 was not backwards compatible till later one when you could get an adapter and i don't mean a slocket. i mean a socket to socket adapter, or if you go on ebay you can get the pin modded version of the Tualatin that works with both sockets, it has a clipped pin and some resistors soldered to the base, and it still fits flush.

 

I didn't look it over thoroughly but you might need to pinmod it. If you look at the datasheet pinout diagrams VSS and VID[5] are switched (AF-2 and AF-3), meaning you'll be stuck with very high or very low voltages (see the VID table) and thus it might not boot. AD-23, AD-24, AE-24, and a few other pins in that area are also different. Other than that the two things look very similar.

I still wouldn't risk it though

 

The VID pins layout is not the same.

Sockets aside, a soket P CPU will not work in a socket M because the BIOS and the chipset won't support it.

 

The chipset is not an issue. Look at the same chipsets on socket 775. And as for bios support, both socket M and socket P support 65nm Core 2 chips.

 

No I meant like, if you've never done one before, they could mess up their laptop cause some people just don't know how to follow directions and can mess it up. For instance a friend of mine tried to take apart something he "thought" was the CPU and ending up bricking his motherboard.

 

Yeah but this is moral hazard we're talking about. The guy is one of the pioneers of low-level mods along with naton and a select few others on these forums.

 

Well if P and M support core 2 can socket M core 2 be found? I have only ever really seen the Pentium M on socket M my self?

 

T5200,T5300,T5500,T5600,T7200,T7400 and T7600.

 

INTEL CORE 2 DUO T7200 SL9SF 2.00/4M/667 CPU | eBay

One example

 

TIL, i learned the socket M supports more than the Pentium M

 

Socket M does not support the Pentium M. The Pentium M uses socket 479.

Socket M - Wikipedia, the free encyclopedia
Socket 479 - Wikipedia, the free encyclopedia

 

although both are 65nm, their architecture is different and thus would require a different BIOS Code. It is true that the difference is small but it exists. For example the configuration of the VID pins is not the same between socket P and M. Another example is the max FSB, 667 for socket M against 800 (1066 with hardware mod) for socket P.

 

The same Merom core was used on both socket M and socket P, as well as socket 775 where it was called Conroe and socket 771 where it was some sort of Xeon. The pinout can be made any way Intel likes using the same core. Obviously FSB is a limitation, but it can be overclocked.

What would be really cool is to have a Socket M or socket P to socket 775 adapter. That would allow some serious overclocking of many mobile chips. I think all the extra pins are just power and ground.

 

That would be cool but it wont work because of the additional space required for the adapter

 

You would just need a heatsink that bolts on and just buy slightly longer bolts and add some small spacers and that should take care of the height issue. I'm still not sure if you could have just a "dumb" adapter or not though.

 

aahh okay, seems socket M is similar but, totally different.

 

That I didn't know...

 

When I said it won't work I meant that there won't be enough space inside the laptop to fit both the adapter and the heatsink .

In the old days Pentium 3 adapters and Pentium M to Pentium 4 adapters were about 1.5cm thik.

What do you mean by "dumb" adapter?

 

Oh, no. I was thinking a mobile chip on a desktop motherboard. The other way around would be pretty iffy, even if the motherboard was out of the laptop.

By dumb I mean just reroute the pins to the correct spot, nothing more. Those old adapters you are talking about I'm pretty sure did more than that.

 

If the adapter is for a desktop then it is a completety different story. Woudn't be easier in this case to buy a desktop mobo with a socket P or M socket? you know those that are made for mini tower (like for a home video server)?

The old adapters had plenty of eletric components build in to them so I guess they did more that rerouting the pins. These components were in charge of regulating the CPU voltage amongst other things.

 

The problem is that socket M and socket P desktop motherboards cost more and kind of suck compared to good socket 775 motherboards.

 

i bet they blow chunks compared to a REAL 775 board like an Asus workstation board.

 

What do you mean "REAL 775 board?" There are only a few Socket P desktop motherboards out there and they are/were priced at the level of premium Socket 775 motherboards yet in most respects are low to mid range. They cost about twice as much or more than comparable Socket 775 motherboards and none are/were available that come close to higher end Socket 775 motherboards.

 

i'm running a "ASUS P5E3 Deluxe Wifi-AP" i know ASUS and maybe Asrock have a whole lines of high end 775 or "HAD". then again there never was a comparison. now if the socket Ps were say micro itx and could support a core 2 quad, then it certainly would have an advantage in size TDP.

 

Yeah, the socket P boards are only high end in price, not in features or performance, in which case they are on par with $50 motherboards. Although I'm partial to EVGA for my higher end motherboards.

All the socket P motherboards support Core 2 Quad. However, they only have a power saving advantage if you just plop it in there. If you tweak the settings, you can get an ITX Socket 775 Core 2 Quad setup to use the same amount of power as an ITX Socket P Core 2 Quad setup. They are the same chip in a different package, so you can underclock and undervolt the desktop processor to match the laptop processor and save money to boot.

I really think that having a Socket P to Socket 775 adapter would be cool though because it would be cheap and it would be so fun to play around with Socket P processors in a decent motherboard, something that is impossible right now.

 

Not true.

While all the motherboards and chipsets technically have the capability, there are a few different sockets out there, and ultimately many notebooks internal power circuitry will not support it. Though I think most of the time when it doesn't work there is a BIOS lockout as to not overdrive the power circuitry, or the CPU microcode is simply not supported.

 

I suspect that on quad-cores, some pins originally marked as Reserved in Socket P are used for actual work.

 

yeah i'm guessing not all socket P's can do c2q cause i haven't seen any thread on any one trying one in a 5920g probably i bet because all socket P quad cores are 1066 bus or higher. witch excludes an array of socket Ps right there.

 

I'm was referring to Socket P desktop motherboards. And no, there are not several different Socket P sockets out there, just one, although you are right about most Socket P laptops not being able to support Core 2 Quad.

If that were true, we would see it in the whitepaper for Socket P Core 2 Quads. They can't keep it a secret, otherwise nobody would know how to make a Socket P motherboard that works with Core 2 Quads.

 

the two causes why most laptops cannot be upgraded to a quad are:
1- the BIOS doesn not support quad CPUs.
2- the motherboard is not designed to supply enough power to the quad CPU.

 

Just tested an acer aspire 5630 with a T7300.
I bent one pin to make it fit. BSEL modded to 166mhz.

Notebook turns on but no POST, still working on it.

 

This is a little different and OT, but could it be possible to swap a quad core socket p into a dual core socket p (meaning PM45 to PM965 chipset) using a pin mod?

 

as far as I know, all attempts to run a quad core socked P cpu into laptops that run socket P cpus have been a FAIL.

somebody somewhere on here succeeded to run one but couldn't actually use more than 2 cores anyways ...

 

You can find a lot of info about that in this thread:
http://forum.notebookreview.com/hp-...x-9000-dragon-owners-lounge-part-2-a-487.html

But I'll leave it to you to search through it to find it.


As far as my mod goes, I've given up, looks like getting my T7300 to work in my 5630 is just not worth spending any more time on.

Going to take my focus back onto modding my new toshiba P750 and it's bios