[imdipped]

Where can I find out what the differences are between the various Intel T 5000 series and the T 7000 series chips are?

[mfbernstein]

Wikipedia's a good place to start.

[mduell]

T5000 have 2 MB cache and are generally lower clockrate, T700 have 4MB and are generally higher clockrate chips. They're otherwise identical (I think the T5000s, at least the early ones, actually have all the cache transistors, but half are disabled).

[imdipped]

mfbernstein, thank you. I did try Wikipedia and Google after I tried the Intel website. I asked the wrong questions. I was confused by all the non Apple notebooks that had so many different T designations. I didn’t know which ones were the Santa Rosa equivalent.

Thank you also mduell, cache is important.

[mduell]

There are only 4 part numbers with the 800Mhz FSB (which most people like to confuse with Santa Rosa, as in the MBPs which are only Crestline): T7100 (1.8), T7300 (2.0), T7500 (2.2), and T7700 (2.4) plus the Extremes (2.6 and 2.8... but I forget the numbers).

Cache isn't really that important; the performance difference ranges from 0-10% depending on app and averages about 3.5%.

[Simon]

Originally Posted by mduell 

...which most people like to confuse with Santa Rosa, as in the MBPs which are only Crestline...

This is really just semantics, but if you wanna be picky, there's no such thing as Crestline vs. SR.

Santa Rosa is a platform, Crestline a chipset. Crestline is one of three parts of the Santa Rosa platform (the others being the C2D CPU "Merom" and the Intel Wireless WiFi Link 4965AGN "Kedron"). OTOH having a Crestline chipset does not automatically make you part of the Santa Rosa platform (which I guess is the point you're trying to make).

plus the Extremes (2.6 and 2.8... but I forget the numbers).

There's only one Merom XE being sold now. The X7800 at 2.6 GHz. The 2.8 GHz part Apple just started using in the high-end iMac is the X7900 which Intel will start selling to others in September.

[mduell]

Originally Posted by Simon 

This is really just semantics, but if you wanna be picky, there's no such thing as Crestline vs. SR.

Santa Rosa is a platform, Crestline a chipset. Crestline is one of three parts of the Santa Rosa platform (the others being the C2D CPU "Merom" and the Intel Wireless WiFi Link 4965AGN "Kedron"). OTOH having a Crestline chipset does not automatically make you part of the Santa Rosa platform (which I guess is the point you're trying to make).

There's only one Merom XE being sold now. The X7800 at 2.6 GHz. The 2.8 GHz part Apple just started using in the high-end iMac is the T7900 which Intel will start selling to others in September.

That's exactly the point I was trying to make.

I'm surprised the 2.8Ghz part will be T7900 instead of X7900, but then again Intel's numbering scheme is starting to make less and less sense (what are they going to do after x900?).

[Simon]

Originally Posted by mduell 

I'm surprised the 2.8Ghz part will be T7900 instead of X7900, but then again Intel's numbering scheme is starting to make less and less sense (what are they going to do after x900?).

D'oh! Nothing to be confused about. It was simply careless typing on my behalf. I just fixed it in my post above.

All Merom XE go by the X7x00 name. The last CPU in the T7x00 series is the T7700 right now. It is possible though that when they start selling X7900 next month the current Merom XE X7800 will become a Merom T7800 - I'm not sure about that yet and rumors have gone both ways.

That said, Intel's naming scheme is indeed a mess. The bus speed and market segment indication works. But their whole inflationary numbering scheme and the overly broad use of the Xeon moniker has caused a lot of confusion lately. In addition they also changed dies w/o reflecting it in their code naming scheme which is really dumb.

[shawmanus]

Originally Posted by mduell 

That's exactly the point I was trying to make.

I'm surprised the 2.8Ghz part will be T7900 instead of X7900, but then again Intel's numbering scheme is starting to make less and less sense (what are they going to do after x900?).

I am pretty sure all core 2 extreme chips start with x. So 2.8ghz is x7900. I remember seeing T7800 in one of the roadmaps. That should have TDP of 35W.

Also since all extreme processors have multipliers unlocked(merom xe upto 15x), apple could have overclocked x7800 in iMac.

I have not seen cpu-z screenshot yet. If any 2.8 ghz iMac owner can run cpu-z on their system and post the screenshot, this confusion would go away for sure.

Apple insider mentioned that its overclocked x7800. i dunno if they were guessing.

[Simon]

Originally Posted by shawmanus 

I am pretty sure all core 2 extreme chips start with x. So 2.8ghz is x7900.

If you bothered to read the thread you would noticed that we already noticed and fixed that.