Broadwell - Microarchitectures - Intel

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	Broadwell µarch
	General Info

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Broadwell (BDW) is Intel's microarchitecture based on the 14 nm process for mobile, desktops, and servers. Introduced in early 2015, Broadwell is a process shrink of Haswell which introduced several enhancements. Broadwell is named after Broadwell, Illinois.

For desktop and mobile, Broadwell is branded as 5th Generation Intel Core processors. For server class processors, Intel branded it as Xeon E3 v4, Xeon E5 v4, and Xeon E7 v4.

Codenames

Core	Abbrev	Target
Broadwell Y	BDW-Y	Core M family, SoC for Smartphones, 2-in-1s Tablets, and notebooks
Broadwell U	BDW-U	Core ultrabooks
Broadwell H	BDW-H	IoT (QM87, HM86/HM87 Chipsets), All-in-ones
Broadwell DT	BDW-DT	Unlocked desktop MPUs
Broadwell EP	BDW-EP	Xeon E5, Dual-Processor platform
Broadwell EX	BDW-EX	Xeon E5, Multi-Processor platform, QPI
Broadwell E	BDW-E	High-End Desktops (HEDT)

Technology

Broadwell is designed to be manufactured using 14 nm Tri-gate FinFET transistors. This correlates to 8 nm Fin width and a 42 nm Fin pitch (shown to the right). SRAM cell is at .0588 um².

Scaling:

	Haswell	Broadwell
	22 nm	14 nm
Fin Pitch	60 nm	42 nm	0.70x
Gate Pitch	90 nm	70 nm	0.78x
Interconnect Pitch	80 nm	52 nm	0.65x

Architecture

Broadwell is for the most part identical to Haswell with several enhancements, including new instruction set extensions.

Key changes from Haswell

~5% IPC improvement
FP multiplication instructions has reduced latency (3 cycles, down from 5)
- Affects AVX, SSE, and FP instructions
CLMUL instructions are now a single μop, improving latency and throughput
The second-level TLB (STLB)
- Table was enlarged (1,536 entries, up from 1024)
- 1GB page mode (16 entries, 4-ways set associative)
Execution Engine
- Larger scheduler (64 entries, up from 60)
- Faster store-to-load forwarding
- Address prediction for branches and returns was improved
- Improved cryptography acceleration instructions

Core features maintained a 2:1 ratio of performance:power.

Graphics

50% higher sampler throughput
Improvements for increased geometry, Z, Pixel Fill
Direct X 11.2, OpenGL 4.3
OpenCL 1.2 and 2.0 (with Shared Virtual Memory)
Up to 24 EUs (20% addition, up from 20 in Haswell), 48 EUs on Iris Pro Graphics

New instructions

Main article: See #Added_instructions for the complete list

Broadwell introduced a number of new instructions:

RDSEED - Generates 16, 32 or 64 bit random numbers seeds (NIST SP 800-90B & NIST SP 800-90C)
ADCX - Arbitrary precision integer operations
PREFETCHW - Prefetch data into caches, hinting a write is expected in the future

Block Diagram

Memory Hierarchy

Cache
- L1 Cache:
  - 32 KB 8-way set associative instruction, 64 B line size
  - 32 KB 8-way set associative data, 64 B line size
  - Write-back policy
  - Per core
- L2 Cache:
  - 256 KB 8-way set associative, 64 B line size
  - Write-back policy
  - Per core
- L3 Cache:
  - 1.5 - 3 MB per core, 64 B line size
  - 16-20 -way set associative
  - Write-back policy
- L4 Cache:
  - 128 MB
  - eDRAM
  - shared with GPU (Crystal Well)
  - Iris Pro models only

Broadwell TLB consists of dedicated level one TLB for instruction cache and another one for data cache. Additionally there is a unified second level TLB.

TLBs:
- ITLB
  - 4KB page translations:
    - 128 entries; 4-way set associative
    - dynamic partition; divided between the two threads
  - 2MB/4MB page translations:
    - 8 entries; fully associative
    - Duplicated for each thread
- DTLB
  - 4KB page translations:
    - 64 entries; 4-way set associative
    - fixed partition; divided between the two threads
  - 2MB/4MB page translations:
    - 32 entries; 4-way set associative
  - 1G page translations:
    - 4 entries; 4-way set associative
- STLB
  - 4KB+2M page translations:
    - 1536 entries; 6-way set associative
    - shared
  - 1GB page translations:
    - 16 entries; 4-way set associative

Pipeline

Main article: Haswell's Pipeline

Broadwell's pipeline is identical to Haswell.

Die

Dual-core Broadwell die:

850px

1,300,000,000 transistors
82 mm²

Dual-core Broadwell with Iris Pro die:

Added instructions

RDSEED - Generates 16, 32 or 64 bit random numbers seeds (both NIST SP 800-90B and NIST SP 800-90C compliant)

RDSEED

ADCX - Arbitrary precision integer operations

ADCX
ADOX

PREFETCHW - Prefetch data into caches, hinting a write is expected in the future.

PREFETCHW

Cores

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All Broadwell Chips

... further results

Broadwell Chips
Main processor									IGP
Model	µarch	Platform	Core	Launched	SDP	TDP	Freq	Max Mem	Name	Freq	Max Freq
3755U	Broadwell		Broadwell U	5 January 2015		15 W 15,000 mW 0.0201 hp 0.015 kW	1,700 MHz 1.7 GHz 1,700,000 kHz	16,384 MiB 16,777,216 KiB 17,179,869,184 B 16 GiB 0.0156 TiB	Intel HD Graphics (Broadwell)	100 MHz 0.1 GHz 100,000 KHz	800 MHz 0.8 GHz 800,000 KHz
i5-5350H	Broadwell			15 April 2015		47 W 47,000 mW 0.063 hp 0.047 kW	3,100 MHz 3.1 GHz 3,100,000 kHz	32,768 MiB 33,554,432 KiB 34,359,738,368 B 32 GiB 0.0313 TiB	Intel Iris Pro Graphics 6200	300 MHz 0.3 GHz 300,000 KHz	1,050 MHz 1.05 GHz 1,050,000 KHz
i5-5575R	Broadwell			15 April 2015		65 W 65,000 mW 0.0872 hp 0.065 kW	2,800 MHz 2.8 GHz 2,800,000 kHz	32,768 MiB 33,554,432 KiB 34,359,738,368 B 32 GiB 0.0313 TiB	Intel Iris Pro Graphics 6200	300 MHz 0.3 GHz 300,000 KHz	1,050 MHz 1.05 GHz 1,050,000 KHz
i5-5675C	Broadwell			15 April 2015		65 W 65,000 mW 0.0872 hp 0.065 kW	3,100 MHz 3.1 GHz 3,100,000 kHz	32,768 MiB 33,554,432 KiB 34,359,738,368 B 32 GiB 0.0313 TiB	Intel Iris Pro Graphics 6200	300 MHz 0.3 GHz 300,000 KHz	1,100 MHz 1.1 GHz 1,100,000 KHz
i5-5675R	Broadwell			15 April 2015		65 W 65,000 mW 0.0872 hp 0.065 kW	3,100 MHz 3.1 GHz 3,100,000 kHz	32,768 MiB 33,554,432 KiB 34,359,738,368 B 32 GiB 0.0313 TiB	Intel Iris Pro Graphics 6200	300 MHz 0.3 GHz 300,000 KHz	1,100 MHz 1.1 GHz 1,100,000 KHz
i7-5500DU	Broadwell		Broadwell U	2016			2,400 MHz 2.4 GHz 2,400,000 kHz	32,768 MiB 33,554,432 KiB 34,359,738,368 B 32 GiB 0.0313 TiB
i7-5750HQ	Broadwell			15 April 2015		47 W 47,000 mW 0.063 hp 0.047 kW	2,500 MHz 2.5 GHz 2,500,000 kHz	32,768 MiB 33,554,432 KiB 34,359,738,368 B 32 GiB 0.0313 TiB	Intel Iris Pro Graphics 6200	300 MHz 0.3 GHz 300,000 KHz	1,050 MHz 1.05 GHz 1,050,000 KHz
i7-5775C	Broadwell			15 April 2015		65 W 65,000 mW 0.0872 hp 0.065 kW	3,300 MHz 3.3 GHz 3,300,000 kHz	32,768 MiB 33,554,432 KiB 34,359,738,368 B 32 GiB 0.0313 TiB	Intel Iris Pro Graphics 6200	300 MHz 0.3 GHz 300,000 KHz	1,150 MHz 1.15 GHz 1,150,000 KHz
i7-5775R	Broadwell			15 April 2015		65 W 65,000 mW 0.0872 hp 0.065 kW	3,300 MHz 3.3 GHz 3,300,000 kHz	32,768 MiB 33,554,432 KiB 34,359,738,368 B 32 GiB 0.0313 TiB	Intel Iris Pro Graphics 6200	300 MHz 0.3 GHz 300,000 KHz	1,150 MHz 1.15 GHz 1,150,000 KHz
i7-5850EQ	Broadwell			2 June 2015		47 W 47,000 mW 0.063 hp 0.047 kW	2,700 MHz 2.7 GHz 2,700,000 kHz	32,768 MiB 33,554,432 KiB 34,359,738,368 B 32 GiB 0.0313 TiB	Intel Iris Pro Graphics 6200	300 MHz 0.3 GHz 300,000 KHz	1,000 MHz 1 GHz 1,000,000 KHz
i7-5850HQ	Broadwell			2 June 2015		47 W 47,000 mW 0.063 hp 0.047 kW	2,700 MHz 2.7 GHz 2,700,000 kHz	32,768 MiB 33,554,432 KiB 34,359,738,368 B 32 GiB 0.0313 TiB	Intel Iris Pro Graphics 6200	300 MHz 0.3 GHz 300,000 KHz	1,100 MHz 1.1 GHz 1,100,000 KHz
i7-5950HQ	Broadwell			2 June 2015		47 W 47,000 mW 0.063 hp 0.047 kW	2,900 MHz 2.9 GHz 2,900,000 kHz	32,768 MiB 33,554,432 KiB 34,359,738,368 B 32 GiB 0.0313 TiB	Intel Iris Pro Graphics 6200	300 MHz 0.3 GHz 300,000 KHz	1,150 MHz 1.15 GHz 1,150,000 KHz
i7-6950X	Broadwell		Broadwell E	31 May 2016		140 W 140,000 mW 0.188 hp 0.14 kW	3,000 MHz 3 GHz 3,000,000 kHz	131,072 MiB 134,217,728 KiB 137,438,953,472 B 128 GiB 0.125 TiB
5Y10	Broadwell		Broadwell Y	2 September 2014		4.5 W 4,500 mW 0.00603 hp 0.0045 kW	800 MHz 0.8 GHz 800,000 kHz	16,384 MiB 16,777,216 KiB 17,179,869,184 B 16 GiB 0.0156 TiB	Intel HD Graphics 5300	100 MHz 0.1 GHz 100,000 KHz	800 MHz 0.8 GHz 800,000 KHz
5Y10a	Broadwell		Broadwell Y	2 September 2014		4.5 W 4,500 mW 0.00603 hp 0.0045 kW	800 MHz 0.8 GHz 800,000 kHz	16,384 MiB 16,777,216 KiB 17,179,869,184 B 16 GiB 0.0156 TiB	Intel HD Graphics 5300	100 MHz 0.1 GHz 100,000 KHz	800 MHz 0.8 GHz 800,000 KHz
5Y10c	Broadwell		Broadwell Y	January 2015	3.5 W 3,500 mW 0.00469 hp 0.0035 kW	4.5 W 4,500 mW 0.00603 hp 0.0045 kW	800 MHz 0.8 GHz 800,000 kHz	16,384 MiB 16,777,216 KiB 17,179,869,184 B 16 GiB 0.0156 TiB	Intel HD Graphics 5300	300 MHz 0.3 GHz 300,000 KHz	800 MHz 0.8 GHz 800,000 KHz
5Y31	Broadwell		Broadwell Y	January 2015	3.5 W 3,500 mW 0.00469 hp 0.0035 kW	4.5 W 4,500 mW 0.00603 hp 0.0045 kW	900 MHz 0.9 GHz 900,000 kHz	16,384 MiB 16,777,216 KiB 17,179,869,184 B 16 GiB 0.0156 TiB	Intel HD Graphics 5300	300 MHz 0.3 GHz 300,000 KHz	850 MHz 0.85 GHz 850,000 KHz
5Y51	Broadwell		Broadwell Y	January 2015	3.5 W 3,500 mW 0.00469 hp 0.0035 kW	4.5 W 4,500 mW 0.00603 hp 0.0045 kW	1,100 MHz 1.1 GHz 1,100,000 kHz	16,384 MiB 16,777,216 KiB 17,179,869,184 B 16 GiB 0.0156 TiB	Intel HD Graphics 5300	300 MHz 0.3 GHz 300,000 KHz	900 MHz 0.9 GHz 900,000 KHz
5Y70	Broadwell		Broadwell Y	2 September 2014		4.5 W 4,500 mW 0.00603 hp 0.0045 kW	1,100 MHz 1.1 GHz 1,100,000 kHz	16,384 MiB 16,777,216 KiB 17,179,869,184 B 16 GiB 0.0156 TiB	Intel HD Graphics 5300	100 MHz 0.1 GHz 100,000 KHz	800 MHz 0.8 GHz 800,000 KHz
5Y71	Broadwell		Broadwell Y	January 2015	3.5 W 3,500 mW 0.00469 hp 0.0035 kW	4.5 W 4,500 mW 0.00603 hp 0.0045 kW	1,200 MHz 1.2 GHz 1,200,000 kHz	16,384 MiB 16,777,216 KiB 17,179,869,184 B 16 GiB 0.0156 TiB	Intel HD Graphics 5300	300 MHz 0.3 GHz 300,000 KHz	900 MHz 0.9 GHz 900,000 KHz
D-1513N	Broadwell	Grangeville	Broadwell DE	July 2017		35 W 35,000 mW 0.0469 hp 0.035 kW	1,600 MHz 1.6 GHz 1,600,000 kHz	131,072 MiB 134,217,728 KiB 137,438,953,472 B 128 GiB 0.125 TiB
D-1518	Broadwell	Grangeville	Broadwell DE	9 March 2015		35 W 35,000 mW 0.0469 hp 0.035 kW	2,200 MHz 2.2 GHz 2,200,000 kHz	131,072 MiB 134,217,728 KiB 137,438,953,472 B 128 GiB 0.125 TiB
D-1520	Broadwell	Grangeville	Broadwell DE	9 March 2015		45 W 45,000 mW 0.0603 hp 0.045 kW	2,200 MHz 2.2 GHz 2,200,000 kHz	131,072 MiB 134,217,728 KiB 137,438,953,472 B 128 GiB 0.125 TiB
D-1521	Broadwell	Grangeville	Broadwell DE	1 November 2015		45 W 45,000 mW 0.0603 hp 0.045 kW	2,400 MHz 2.4 GHz 2,400,000 kHz	131,072 MiB 134,217,728 KiB 137,438,953,472 B 128 GiB 0.125 TiB
D-1523N	Broadwell	Grangeville	Broadwell DE	July 2017		45 W 45,000 mW 0.0603 hp 0.045 kW	2,000 MHz 2 GHz 2,000,000 kHz	131,072 MiB 134,217,728 KiB 137,438,953,472 B 128 GiB 0.125 TiB
D-1527	Broadwell	Grangeville	Broadwell DE	1 November 2015		35 W 35,000 mW 0.0469 hp 0.035 kW	2,200 MHz 2.2 GHz 2,200,000 kHz	131,072 MiB 134,217,728 KiB 137,438,953,472 B 128 GiB 0.125 TiB
D-1528	Broadwell	Grangeville	Broadwell DE	1 November 2015		35 W 35,000 mW 0.0469 hp 0.035 kW	1,900 MHz 1.9 GHz 1,900,000 kHz	131,072 MiB 134,217,728 KiB 137,438,953,472 B 128 GiB 0.125 TiB
D-1529	Broadwell	Grangeville	Broadwell DE	April 2016		20 W 20,000 mW 0.0268 hp 0.02 kW	1,300 MHz 1.3 GHz 1,300,000 kHz	131,072 MiB 134,217,728 KiB 137,438,953,472 B 128 GiB 0.125 TiB
D-1531	Broadwell	Grangeville	Broadwell DE	1 November 2015		45 W 45,000 mW 0.0603 hp 0.045 kW	2,200 MHz 2.2 GHz 2,200,000 kHz	131,072 MiB 134,217,728 KiB 137,438,953,472 B 128 GiB 0.125 TiB
D-1533N	Broadwell	Grangeville	Broadwell DE	July 2017		45 W 45,000 mW 0.0603 hp 0.045 kW	2,100 MHz 2.1 GHz 2,100,000 kHz	131,072 MiB 134,217,728 KiB 137,438,953,472 B 128 GiB 0.125 TiB
D-1537	Broadwell	Grangeville	Broadwell DE	1 November 2015		35 W 35,000 mW 0.0469 hp 0.035 kW	1,700 MHz 1.7 GHz 1,700,000 kHz	131,072 MiB 134,217,728 KiB 137,438,953,472 B 128 GiB 0.125 TiB
D-1539	Broadwell	Grangeville	Broadwell DE	April 2016		35 W 35,000 mW 0.0469 hp 0.035 kW	1,600 MHz 1.6 GHz 1,600,000 kHz	131,072 MiB 134,217,728 KiB 137,438,953,472 B 128 GiB 0.125 TiB
D-1540	Broadwell	Grangeville	Broadwell DE	9 March 2015		45 W 45,000 mW 0.0603 hp 0.045 kW	2,000 MHz 2 GHz 2,000,000 kHz	131,072 MiB 134,217,728 KiB 137,438,953,472 B 128 GiB 0.125 TiB
D-1541	Broadwell	Grangeville	Broadwell DE	1 November 2015		45 W 45,000 mW 0.0603 hp 0.045 kW	2,100 MHz 2.1 GHz 2,100,000 kHz	131,072 MiB 134,217,728 KiB 137,438,953,472 B 128 GiB 0.125 TiB
D-1543N	Broadwell	Grangeville	Broadwell DE	July 2017		45 W 45,000 mW 0.0603 hp 0.045 kW	1,900 MHz 1.9 GHz 1,900,000 kHz	131,072 MiB 134,217,728 KiB 137,438,953,472 B 128 GiB 0.125 TiB
D-1548	Broadwell	Grangeville	Broadwell DE	1 November 2015		45 W 45,000 mW 0.0603 hp 0.045 kW	2,000 MHz 2 GHz 2,000,000 kHz	131,072 MiB 134,217,728 KiB 137,438,953,472 B 128 GiB 0.125 TiB
D-1553N	Broadwell	Grangeville	Broadwell DE	July 2017		65 W 65,000 mW 0.0872 hp 0.065 kW	2,300 MHz 2.3 GHz 2,300,000 kHz	131,072 MiB 134,217,728 KiB 137,438,953,472 B 128 GiB 0.125 TiB
D-1557	Broadwell	Grangeville	Broadwell DE	24 February 2016		45 W 45,000 mW 0.0603 hp 0.045 kW	1,500 MHz 1.5 GHz 1,500,000 kHz	131,072 MiB 134,217,728 KiB 137,438,953,472 B 128 GiB 0.125 TiB
D-1559	Broadwell	Grangeville	Broadwell DE	April 2016		45 W 45,000 mW 0.0603 hp 0.045 kW	1,500 MHz 1.5 GHz 1,500,000 kHz	131,072 MiB 134,217,728 KiB 137,438,953,472 B 128 GiB 0.125 TiB
D-1567	Broadwell	Grangeville	Broadwell DE	24 February 2016		65 W 65,000 mW 0.0872 hp 0.065 kW	2,100 MHz 2.1 GHz 2,100,000 kHz	131,072 MiB 134,217,728 KiB 137,438,953,472 B 128 GiB 0.125 TiB
D-1571	Broadwell	Grangeville	Broadwell DE	24 February 2016		45 W 45,000 mW 0.0603 hp 0.045 kW	1,300 MHz 1.3 GHz 1,300,000 kHz	131,072 MiB 134,217,728 KiB 137,438,953,472 B 128 GiB 0.125 TiB
D-1577	Broadwell	Grangeville	Broadwell DE	24 February 2016		45 W 45,000 mW 0.0603 hp 0.045 kW	1,300 MHz 1.3 GHz 1,300,000 kHz	131,072 MiB 134,217,728 KiB 137,438,953,472 B 128 GiB 0.125 TiB
D-1581	Broadwell	Grangeville	Broadwell DE	24 February 2016		65 W 65,000 mW 0.0872 hp 0.065 kW	1,800 MHz 1.8 GHz 1,800,000 kHz	131,072 MiB 134,217,728 KiB 137,438,953,472 B 128 GiB 0.125 TiB
D-1587	Broadwell	Grangeville	Broadwell DE	24 February 2016		65 W 65,000 mW 0.0872 hp 0.065 kW	1,700 MHz 1.7 GHz 1,700,000 kHz	131,072 MiB 134,217,728 KiB 137,438,953,472 B 128 GiB 0.125 TiB
D-1602	Broadwell	Grangeville	Hewitt Lake	2 April 2019		27 W 27,000 mW 0.0362 hp 0.027 kW	2,500 MHz 2.5 GHz 2,500,000 kHz	131,072 MiB 134,217,728 KiB 137,438,953,472 B 128 GiB 0.125 TiB
D-1612	Broadwell	Grangeville	Hewitt Lake	2 April 2019		22 W 22,000 mW 0.0295 hp 0.022 kW	1,500 MHz 1.5 GHz 1,500,000 kHz	131,072 MiB 134,217,728 KiB 137,438,953,472 B 128 GiB 0.125 TiB
D-1622	Broadwell	Grangeville	Hewitt Lake	2 April 2019		40 W 40,000 mW 0.0536 hp 0.04 kW	2,600 MHz 2.6 GHz 2,600,000 kHz	131,072 MiB 134,217,728 KiB 137,438,953,472 B 128 GiB 0.125 TiB
D-1623N	Broadwell	Grangeville	Hewitt Lake	2 April 2019		35 W 35,000 mW 0.0469 hp 0.035 kW	2,400 MHz 2.4 GHz 2,400,000 kHz	131,072 MiB 134,217,728 KiB 137,438,953,472 B 128 GiB 0.125 TiB
D-1627	Broadwell	Grangeville	Hewitt Lake	2 April 2019		45 W 45,000 mW 0.0603 hp 0.045 kW	2,900 MHz 2.9 GHz 2,900,000 kHz	131,072 MiB 134,217,728 KiB 137,438,953,472 B 128 GiB 0.125 TiB
D-1632	Broadwell	Grangeville	Hewitt Lake	2 April 2019		30 W 30,000 mW 0.0402 hp 0.03 kW	1,500 MHz 1.5 GHz 1,500,000 kHz	131,072 MiB 134,217,728 KiB 137,438,953,472 B 128 GiB 0.125 TiB
Count: 110

codename	Broadwell +
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