Anand's die size calcs don't seem to add up?

[Enigmoid]

You are definitely wrong here. 32-35% for IVB would be in the Haswell range. Even AMD confirms: http://cdn.wccftech.com/wp-content/uploads/2013/04/AMD-Richland-vs-Haswell-GPU.jpg

huh

Thanks

 

[IntelUser2000]

From the Datasheet, extrapolating from the images:

H series GT2 209mm2
On packge cache memory = 79.4mm2
H series GT3 = 250mm2
M series GT2 = 176.6mm2

(The official die size for M is 177mm2 so the other numbers shoudn't be off very much)

PCWatch says part of the CPU die is taken up by the tags for the On-package cache memory and may be few MBytes in size. The H series GT2 must be graphics fused off version of the H series GT3. The tags take up ~30mm2.

Based on the die shots and the official size numbers, I got the following numbers:

49.9mm2 = GT2 GPU(From regular GT2 Quad core, the non H)
96.9mm2 = GT3 GPU(From Dual core ULT)

Percentage-wise compared to the die size:

GT2(the non H series) = 28%
GT3(on the Dual core ULT) = 54%
GT3(on the Quad core) = 38%(50% with eDRAM Tags)

 

[AtenRa]

Intel 32nm Sandybridge Quad core GT2 = 216mm2

Sandybridge GT2 iGPU is approximately 39,3mm2, that is close to ~18% of the entire die area of 216mm2.
Sandybridge Core size excluding the L3 Cache is roughly 18,7mm2
2MB L3 Cache is approximately 11mm2


Intel 22nm Ivybridge Quad Core GT2 = 160mm2

Ivybridge GT2 iGPU is approximately 43,6mm2, that is close to ~27% of the entire die area of 160mm2.
Ivybridge Core size excluding the L3 Cache is roughly 12mm2
2MB L3 Cache is approximately 6mm2

IvyBridge Core (excluding the L3) is 35% smaller than Sandybridge
Ivybridge 2MB L3 cache is 45% smaller than Sandybridge

4 EU from Ivybridge GT2 are approximately 5mm2. So we abstract that from the iGPU and we have 43,6 – 5 = 38,6mm2. Now that is only marginal smaller than Sandybridge iGPU. The reason is that Ivybridge iGPU Front End is much larger than Sandy. So we cannot compare the iGPUs if we don’t have the transistor count.