Tom's Hardware > Forum > CPU & Components > CPUs > Memory controller die area
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balvir   10-29-2009 at 07:48:16 AM

Hi, can anyone tell what percentage of processor die area is covered by memory controller and cache controller.

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jimmysmitty   10-29-2009 at 07:58:00 AM
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Depends on the CPU. Core i7, Core i5 and Phenom II are different each.

Average, the IMC probably takes maybe 10-15%. The Cache and Core logic take the most.

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505090   10-29-2009 at 08:07:41 AM
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that sounds like a homework question

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balvir   10-30-2009 at 07:19:56 AM
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505090 wrote :

that sounds like a homework question


Hmm, but do u have any answer to that question? :)

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balvir   10-30-2009 at 07:22:46 AM
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jimmysmitty wrote :

Depends on the CPU. Core i7, Core i5 and Phenom II are different each.

Average, the IMC probably takes maybe 10-15%. The Cache and Core logic take the most.



Hi, thanks. Can you provide some substantial information and point to some documentary evidences (For Core i7 and Core i5 both).

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cjl   10-30-2009 at 07:33:18 AM
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Here's a die shot. Start measuring:

 

Bloomfield (LGA 1366 i7):
http://images.anandtech.com/reviews/cpu/intel/nehalem/review/Nehalem_Die_callout.jpg

 

Lynnfield (LGA 1156 i7 and i5):
http://images.anandtech.com/reviews/cpu/intel/lynnfield/review/LFDDieLayout.jpg


Message edited by cjl on 10-30-2009 at 07:33:32 AM
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balvir   10-30-2009 at 08:27:24 AM
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Hi, guys thanks a lot. One more thing, I am looking for this information for Intel Core 2 Duo also.

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balvir   10-30-2009 at 08:30:44 AM
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I mean to say for Caches and Cache Controllers.

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jimmysmitty   10-30-2009 at 09:26:12 AM
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Oh then thats different. Cache itself is a large part of the chip as seen in the pictures above. Core 2 Duo is here:

http://www.geek.com/wp-content/uploads/2009/10/intel_core_2_duo_P7450_die.png

The cache again is on the bottom and takes up a large part of the CPU, looks to be near 30%+.

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cjl   10-30-2009 at 10:05:27 AM
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Yes, but the cache controller is pretty small.

 

Here's a Yorkfield (45nm Core 2 Quad) die:
http://img.tomshardware.com/us/2008/02/07/intel_skulltrail_part_2/intel_skulltrail_part_ii___penryn_die.jpg

 

It has more cache per core than the core 2 duo above, which is a reduced-cache model.


Message edited by cjl on 10-30-2009 at 10:08:27 AM
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