Friday, August 8, 2014

Peek into an 2014 Apple Macbook Pro retina 15 inch laptop (MBPr 11,2). This is the laptop with a quadcore haswell / crystalwell series Core i7 CPU.

Peek into an Apple Macbook Pro ( retina 15 inch Mid 2014 ) (MBPr 11,2) notebook computer. This is the laptop with a haswell / crystalwell series Core i7 CPU, 16GB RAM. The laptop is a speed demon, with buttery smooth graphics, svelte chassis and very high resolution (2880x1800) IPS retina display :). It's a huge improvement from the original 2012 Ivy Bridge MBPr, which had choppy scrolling and zooming, that made Safari, exposè and other visually intensive apps almost unusable. 

Macbook Pro 11,2 (Retina, 15-inch, Mid 2014) Crystalwell quadcore 

512GB SSD. PCI Express. 700MBytes/s Read and Write bandwidth!

Low noise Fan1. Default rpm=2K, max=6K.

Low noise Fan2. Default rpm=2K, max=6K.

802.11ac coaxial cables 3 channel. Also the tiny heatsink fins.

95Watt Hour LiPo battery specs

16GB DDR3L RAM. The chips are SKHynix (PB speed grade) parts. According to the datasheet, these are 1600MHz CL 11 (11-11-11) chips.

Broadcom BCM 94360 802.11ac module with 3 channels.

Intel Core i7 CPU heatsink + heatpipe

                     Core i7 quad core HQ Haswell CPU + 128MB eDRAM (47Watt TDP + 5W eDRAM?)

             From the Intel datasheet: Units W: Package: 47 Processor Die: 47 On-package Cache Memory Die: 5 
Processor die and eDRAM die organization. ~50% of the processor die is devoted to GT3 graphics. The eDRAM is a 22nm Intel custom designed part with ~100GByte/s bandwidth to the chip. Apparently it's a victim buffer to cache data evicted from L3. This buffer is used by both the CPU cores and GT3. I hope future clang / g++ compilers have a flag to optimize data accesses to make good use of this cache.   (picture source chipworks)

 A bit too much thermal paste for my taste!

 Die shot after cleaning of residual thermal paste, before repasting with quality thermal compound.


 The thin heat pipe with micro fins is barely adequate for cooling the CPU when engaging all 4 cores + HT at full turbo speeds. 
This can be easily seen using Intel Power Gadget below.
 The CPU is trigger happy initially raising the 4 core to turbo as high as 3.76GHz!! The power consumption is 65.15W for the short burst.
 
 Soon Tjmax is reached and the CPU down-clocks to 3.3GHz and TDP howers in the advertised range which is 47Watts (according to Intel).
Here is another snapshot with the CPU usage charts. I am running a software called bowtie aligner, which maps sequence reads to a genome assembly. The software is using 8 threads.
During idle, the core i7 CPU stays at 0.8GHz. The graphics subsystem idles at 750MHz (I would like to see it go lower since it stays at 350MHz on my haswell series Macbook air. Idle power consumption of the CPU package (including eDRAM?) is ~3.5W - 4W.
 I have seen the GPU frequency go as high as 1.3GHz when using Exposè and Mission control. 

Geekbench 3 score of 4017(single core), 15478(multi-core). The increased performance is possbile after replacing factory thermal paste with a carefully applied cocktail of Shin-etsu and Antec diamond particle based (formula 6) thermal pastes. Link: http://browser.primatelabs.com/geekbench3/744943

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