FCPGA and FCBGA. Which one is Socket 479?

Are FCPGA and FCBGA both Socket 479? I am confused because my T7600 SL9SD is shown as using Socket 479 mPGA by CPU-Z. But according to Wiki article, Micro FCPGA uses 478 pins while Micro FCBGA uses 479 pins. Mine also has 2 missing pins while PCBGA I believe has 1 missing pin. So, shouldn't mine be Socket 478?

 

FCPGA= FlipChipPinGridArray.
FCBGA= FlipChipBallGridArray.
A BGA is an IC that is soldered to the motherboard and cannot be removed without specialist tools and knowledge. If it is in a socket then it is a FCPGA.

 

Socket 478 hasn't been used since the introduction of Pentium M. Socket 479 is compatible with both CPUs which use 478 or 479 pins (except the older CPUs, as they are a bit different). Therefore, a 478 ball CPU is compatible with a 479 pin socket.

 

How? One is soldered to the PCB (BGA) the other is fitted to a socket (PGA) and can be changed.

 

The CPU that comes with most machines is probably soldered onto the motherboard if it was a FCBGA package. However, there are FCBGA CPUs that are not soldered onto the board. Those can be purchased separately and installed on a Socket 479 pin board with an adaptor. I do realise that I made a mistake in my last sentence, stating that:
"Therefore, a 478 ball CPU is compatible with a 479 pin socket."
What I meant to say was that a 478 pin CPU (FCPGA in other words) is compatible with a 479 pin socket.

What I was basically trying to state in my previous post was that CPU-Z did not make a mistake, and Hendra's first sentence is corrent. Socket 478 has long been replaced by Socket 479 (and later on by Socket M), and Hendra's 478 pin Core CPU does fit in a 479 pin Socket M.

 

Folks, you guys are making this more confusing that it needs to be. There are four sockets for Intel mobile processors: Socket 478, 479, M, and P. Despite their numbers and letters, Sockets 478, M, and P have 478 contacts whereas Socket 479 has 479 contacts. The physical sockets are all almost identical, save for the offset of a few pins in the corner of each socket.

PGA and BGA refer to type of contact on the processor. PGA chips have pins on the chip side and BGA chips have "balls" on the chip side. As mentioned, PGA chips are replaceable, while BGA chips are soldered to the motherboard. The pin configuration on the back of the chip is the same, regardless of the contact type.

Because BGA chips are soldered to a mainboard and do not use a physical "socket", they are usually not listed as being associated with a socket. That means that while a T7600 PGA chip is considered a Socket M processor, a T7600 BGA chip is NOT considered a Socket M processor; it is simply a BGA processor (this sort of notation is seen on Wikipedia, as you may have seen).

The SL9SD is a Socket M chip. It has 478 pins. CPUZ is wrong in listing it as being or having 479 anything.

EDIT: Due to the way that the pins are offset between Socket 479 and Socket M, Socket M chips WILL actually physically fit in a Socket 479 motherboard. Of course, it won't work electronically, but it's mechanically compatible nonetheless XD

 

Oh. I always thought Socket M was just an upgraded Socket 479 with 479 pins. Guess I was wrong. Just like CPU-Z.

 

How is this confusing? I was concise and to the point. Without looking at the processor fitted to the motherboard there isn't really anyway to tell as there are T7600 processors that are BGA and PGA.
@Commander Wolf: You are absolutely right in stating that the SL9SD is a micro-FCPGA chip but as CPU-z can be wrong it should not be trusted as the definitive source of information. There is an awful lot that can go wrong in the reading of processor device codes and then interpreting them that software is no substitute for visual confirmation of the processor type.

 

Its already confusing as it is....
I was looking on ebay for a T7600(specifically SL9SD, micro-FCPGA). And I found a T7600 SL9SJ. According to seller, it has the same specs as the SL9SD, which they are correct but SL9SJ is a micro-FCBGA. However, they have pictures of the processor and it shows that it has pins and with marking as SL9SJ. They even state on their description that it has pins, and for socket M (479m).
How can this be? Intel listed SL9SD as Pin Grid Array, and SL9SJ as Ball Grid Array, how did they come up with a T7600 SL9SJ on a micro-FCPGA?

Does anyone have an idea?

 

OK Intel makes stuff intentionally difficult. Commander pretty much laid out the way it is and is correct.

mike to all your questions? Well as confusing as Intel is these guys got confused? I myself would lose confidence buying from someone who does not know what they are selling. There is an Intel CPU spec site. I am between notebooks so can't check now or link. BGA and PGA is all you must know for upgradeable. I mean assuming you have your "M"/"P" correct.

andygb40 you are correct with nothing better than a physical/visual inspection. That said it is not complicated reading/testing it is sloppy code that causes CPU-Z miss reads.

My two cents!

 

From what I have researched over the internet....
T7600 SL9SD is a micro-FCPGA (pin grid array)
-has 478 pins
-fits into Socket M aka socket 479m, which has 479 holes

T7600 SL9SJ is a micro-FCBGA (ball grid array)
-has 479 connection (balls) but the extra connection(compared to 478 pins of the micro-FCPGA) is unused.
-usually soldered on the motherboard.

If you are pertaining to SOCKET 479 (Zero Insertion Free, has a lever to lock the chip), then this is not compatible with T7600 SL9SD. The chip used for those socket has a larger form factor.

If you are pertaining to SOCKET M aka socket 479m (479 hole socket), then this is the socket used for the T7600 SL9SD. The socket uses the smaller form factor of the T7600.

Hence T7600 micro-FCBGA was indicated by CPU-Z as socket 479m because they are generally the same chip with the micro-FCPGA, but only differs in the method of connection to the motherboard.

For something related to T7600 SL9SJ/SL9SD, see my post "Intel T7600 SL9SJ have pins?"

 

I just installed an T7600 SL9SJ micro-FCBGA chip WITH PINS!!!

Although it should have 479 pins, but 1 pin was not installed, making it effectively as 478 pins. But according to Intel's data sheet, this pin is unused.

Checking with CPU-Z ver 1.48, it still states that the chip installed is a SOCKET 479 mPGA. Hence, it just shows that CPU-Z could not distinguish the difference between a mBGA and mPGA chip. Because they have the same chip on different chip package.

For something related to T7600 SL9SJ/SL9SD, see my post "Intel T7600 SL9SJ have pins?"

 

Hi there!

Sorry for digging up the thread, but I was googling and I have a problem related to all this, because I want to buy a desktop motherboard for my Pentium M 1.6Ghz (Micro-FCPGA) from an old laptop (samsung P28):

http://processorfinder.intel.com/details.aspx?sSpec=SL7EG

It does have 478pins:
http://www.webopedia.com/TERM/M/micro_FCPGA.html

I was going to buy a 478 Desktop motherboard for it (since it only has 478 pins), but after reading this discussion and this (pages 139, 140 and 141):

http://books.google.pt/books?id=xCX...X&oi=book_result&resnum=8&ct=result#PPA140,M1

I am now a little bit confused...

Do i really need a socket 479 motherboard for my 478pins Pentium M processor (with micro-FCPGA tecnology), or can I buy a Desktop motherboard with 478 socket?

I really need some help here... cause i´m going a bit crazy with all this socket stuff.

Cheers

 

You need a Socket 479 motherboard. There are special Socket 479 motherboards made just for Pentium M processors. You cannot use a desktop 478 board as they only support Pentium 4 processors. As a word of warning: oftentimes vendors will list Socket M and Socket P motherboards as "Socket 479", since Socket M and P ALSO have 479 pins; make sure your board has a chipset in the 800 range.

 

Why is that? Why cannot be assembled in a 478 socket from a desktop if it has 478 pins?

Finding a cheap 479 motherboard is not easy.. and the Asus CT-479 is even harder to find.

I think I am going to give up on this idea...

 

Desktop 478 is different to notebook 478/479 as the notebook has a smaller CPU and the desktop has a larger one, so a mobile cpu won't fit in desktop 478 motherboard in any way. It has to be for a mobile CPU, hence he mentioned a socket 479 motherboard.

So yeah, it's not gonna be that easy to find.

 

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MEWAX:IT&item=120363110262

5 available too... I actually want one XD

EDIT: This one'll only take 400MHz FSB. Watch out.

 

I´m not from US.. If I could find one in Europe would be nice!

Michel.K, are you sure about the size thing for every notebook? Because I have an old Advent 7012 with Pentium IV 2.6Ghz and it seems to me that it has the same size from the desktop ones..

Cheers

 

Some notebooks may use desktop CPU's. But that's just some.


However, i'm sure. I have a mobile socket 479M(socket M) CPU right here besides me and an old pentium 4 socket 478 and the desktop CPU is larger.


EDIT: You could by from ebay easily even though you live in eu. Shipping isn't that much really! And usualy everyone ships everywhere!