Broadwell (previously Rockwell) is an CPU microarchitecture designed by Intel, based on the x86-64 instruction set. As a "tick" generation of the company's tick–tock model, Broadwell is a die shrink of its predecessor, Haswell, manufactured with the newer 14 nm FinFET process node. Broadwell-based products are marketed as the fifth generation Core, v4-suffixed Xeon, and various models of Pentium and Celeron. Like some of the previous tick-tock iterations, Broadwell did not completely replace the full range of Haswell CPUs, as there were no low-end desktop CPUs based on Broadwell. The microarchitecture also introduced the Core M processor branding for the first time.

Broadwell's H and C variants are used in conjunction with Intel 9 Series chipsets (Z97, H97 and HM97), in addition to retaining backward compatibility with some of the Intel 8 Series chipsets.

Design and variants Broadwell has been launched in three major variants: BGA package: Broadwell-Y: system on a chip (SoC); 4.5 W and 3.5 W thermal design power (TDP) classes, for tablets and certain ultrabook-class implementations. GT2 GPU was used, while maximum supported memory is 8 GB of LPDDR3-1600. These were the first chips to roll out, in Q3/Q4 2014. At Computex 2014, Intel announced that these chips would be branded as Core M. TSX instructions are disabled in this series of processors because a bug that cannot be fixed with a microcode update exists. Broadwell-U: SoC; two TDP classes15 W for 2+2 and 2+3 configurations (two cores with a GT2 or GT3 GPU) as well as 28 W for 2+3 configurations. Designed to be used on motherboards with the PCH-LP chipset for Intel's ultrabook and NUC platforms. Maximum supported is up to 16 GB of DDR3 or LPDDR3 memory, with DDR3-1600 and LPDDR3-1867 as the maximum memory speeds. The 2+2 configuration is scheduled for Q4 2014, while the 2+3 is estimated for Q1 2015. For Broadwell-U models with integrated 5x00 GPUs, die size is 82 mm2 with a total of 1.3 billion transistors, while for the models with 6100 and 6200 GPUs the die size is 133 mm2 with a total of 1.9 billion transistors. Broadwell-H: 37 W and 47 W TDP classes, for motherboards with HM86, HM87, QM87 and the new HM97 chipsets for "all-in-one" systems, mini-ITX form-factor motherboards, and other small footprint formats. It was expected to come in two different variants, as single and dual chips; the dual chips (4 cores, 8 threads) would have GT3e and GT2 GPU, while a single chip (SoC; two cores, four threads) would have GT3e GPU. Maximum supported memory is 32 GB of DDR3-1600. These are scheduled for Q2 2015. LGA 1150 socket: Broadwell-DT: quad-core unlocked desktop version with GT3e integrated graphics (Iris Pro 6200) and 128 MB of eDRAM L4 cache, in a 65 W TDP class. Announced to be backward compatible with the LGA 1150 motherboards designed for Haswell processors. LGA 2011-1 socket: Broadwell-EX: Brickland platform, for mission-critical servers. Intel QuickPath Interconnect (QPI) is expected to be updated to version 1.1, enabling seamless scaling beyond eight-socket systems. Maximum supported memory speeds are expected to be DDR3-1600 and DDR4-1866. Up to 24 core and 48 threads, up to 60 MB of L3 cache and 32 PCI Express 3.0 lanes, with 115–165 W TDP. LGA 2011-v3 socket: Broadwell-EP: to be marketed as Xeon E5-2600 v4 etc., while using the C610 Wellsburg chipset platform. Up to 22 cores and 44 threads, up to 55 MB of total cache and 40 PCI Express 3.0 lanes, with 55–160 W TDP classes. Maximum supported memory speed is quad-channel DDR4-2400. Broadwell-E: HEDT platform, for enthusiasts. Announced at Computex 2016, it was released in July that year. Consisting of four processors: the 6800K, 6850K, 6900K, and the deca-core 6950X, with clock speeds ranging from 3 GHz to 4 GHz as well as up to 25 MB of L3 cache.

Architecture changes compared to Haswell Unusually for a "tick", Broadwell introduces some instruction set architecture extensions Alt URL not present in earlier versions of the Haswell microarchitecture:

CPU Instruction Intel ADX: ADOX and ADCX for improving performance of arbitrary-precision integer operationsNew Instructions Supporting Large Integer Arithmetic on Intel Architecture Processors (Document number 327831 -001) // Intel, August 2012 RDSEED for generating 16-, 32- or 64-bit random numbers from a thermal noise entropy stream, according to NIST SP 800-90B and 800-90CIntel C++ Composer XE 2013 for Windows* Installation Guide and Release Notes (Document number: 321414-004US) // Intel, October 4, 2012; section "3.2.4 Inline assembly and intrinsic support for Intel architecture code named Broadwell added to Composer XE 2013 Update 1", page 13 PREFETCHW instruction SMAP instruction Supervisor Mode Access Prevention (SMAP)optionally disallows access from kernel-space memory to user-space memory, a feature aimed at making it harder to exploit software bugs. Transactional Synchronization Extensions (except for Broadwell-Y due hardware bug) FP multiplication instructions has improved latency Larger scheduler (up to 64 entries) Broadwell-E introduced Intel Turbo Boost Max Technology 3.0

GPU Gen 8 (From Gen 7.5) Up to 48 Execution Units (from 40) VP8 hardware decoding and hybrid encoding HEVC hybrid decoding Two independent bit stream decoder (BSD) rings to process video commands on GT3 GPUs, allows one BSD ring to process decoding and the other BSD ring to process encoding at the same time. Direct3D 12 OpenGL 4.4 (OpenGL 4.6 on Linux) OpenCL 2.0.

I/O

90 series chipset: H97 and Z97 Add PCIe M.2 support (only H97 and Z97)

All versions of Haswell except for the Haswell-EX variants has been fixed with a new CPU stepping level.Erratum: In fact, among Broadwell i3, i5 and i7 CPUs, only four of them support TSX instructions (i7 5650U and 5600U, i5 5350U and 5300U); it is not even precised on Intel's website whether i5 5200U does support TSX instructions.

List of Broadwell processors

Desktop processors Processor brandingModel Cores(threads) GPU model CPU frequency TDP Graphics clock rate L3 cache L4 cache Releasedate Price(USD) SocketBaseTurboBaseMax Core i7 5775C 4 (8) Iris Pro 6200 3.3 GHz 3.7 GHz 65 W 300 MHz 1.15 GHz 6 MB 128 MB $366 LGA1150 Core i5 5675C 4 (4) 3.1 GHz 3.6 GHz 1.1 GHz 4 MB $276

"Broadwell-E" HEDT (14 nm)

Embedded processors Processor brandingModel Cores(threads) GPU model CPU frequency TDP Graphics clock rate L3cache L4cache Release date Price(USD) SocketBaseTurboBaseMax Core i7 5775R 4 (8) Iris Pro 6200 3.3 GHz 3.8 GHz 65 W 300 MHz 1.15 GHz 6 MB 128 MB $348 BGA1364 Core i5 5675R 4 (4) 3.1 GHz 3.6 GHz 1.1 GHz 4 MB $265 5575R 2.8 GHz 3.3 GHz 1.05 GHz $244 Xeon E3 1284Lv4 4 (8) Iris Pro P6300 2.9 GHz 3.8 GHz 47 W 1.15 GHz 6 MB OEM 1278Lv4 2.0 GHz 3.3 GHz 800 MHz 1.0 GHz $546 1258Lv4 P5700 1.8 GHz 3.2 GHz 700 MHz $481

Mobile processors

Processor brandingModel Cores(threads) GPU model Basefrequency Turbo frequency TDP cTDP down Graphicsclock rate L3cache Release date Price(USD)Single CoreDual CoreBaseMax Core i7 5950HQ 4 (8)Iris Pro 62002.9 GHz3.7 GHz47 W300 MHz1.15 GHz6 MBJune 2015$623 5850HQ2.7 GHz3.6 GHz1.1 GHz$434 5750HQ2.5 GHz3.4 GHz600 MHz / 37 W1.05 GHz$434 5700HQHD 56002.7 GHz3.5 GHz$378 5650U 2 (4)HD 6000 2.2 GHz3.2 GHz3.1 GHz15 W600 MHz / 9.5 W1 GHz4 MBQ1 2015$426 5600UHD 5500 2.6 GHz600 MHz / 7.5 W950 MHz$393 5557UIris 61003.1 GHz3.4 GHz3.4 GHz28 WN/A / 23 W1.1 GHz$426 5550UHD 6000 2.0 GHz3.0 GHz2.9 GHz15 W600 MHz / 9.5 W1 GHz$426 5500UHD 5500 2.4 GHz600 MHz / 7.5 W950 MHz$393 Core i5 5350HIris Pro 62003.1 GHz3.5 GHz47 W1.05 GHzJune 2015$289 5350UHD 60001.8 GHz2.9 GHz2.7 GHz15 W600 MHz / 9.5 W1 GHz3 MBQ1 2015$315 5300UHD 55002.3 GHz600 MHz / 7.5 W900 MHz$281 5287UIris 61002.9 GHz3.3 GHz3.3 GHz28 W600 MHz / 23 W1.1 GHz$315 5257U2.7 GHz3.1 GHz3.1 GHz1.05 GHz$315 5250UHD 60001.6 GHz2.7 GHz2.5 GHz15 W600 MHz / 9.5 W950 MHz$315 5200UHD 55002.2 GHz600 MHz / 7.5 W900 MHzFebruary 2015$281 Core i3 5157UIris 61002.5 GHz28 W600 MHz / 23 W1 GHzJanuary 2015$315 5020UHD 55002.2 GHz600 MHz / 10 W900 MHzMarch 2015$281 5015U2.1 GHz850 MHz$275 5010U900 MHzJanuary 2015$281 5005U2.0 GHz850 MHz$275 Pentium 3825UHD Graphics1.9 GHz2 MBMarch 2015 3805U 2 (2)100 MHz800 MHzQ1 2015$161 Celeron 3755U1.7 GHz$107 3205U1.5 GHz$107

Core M Ultra Low Power Mobile Processors

ProcessorbrandingModel Cores(Threads) GPU Model Programmable TDP CPU Turbo Graphics Clock rate L3Cache ReleaseDate Price(USD) SDP cTDP down Nominal TDP cTDP up 1-core Normal Turbo Core M (vPro) 5Y71 2 (4) HD 5300 (GT2) 3.5 W 3.5 W / 600 MHz 4.5 W / 1.2 GHz 6 W / 1.4 GHz 2.9 GHz 300 MHz 900 MHz 4 MB $281 5Y70 4.5 W / 1.1 GHz 2.6 GHz 100 MHz 850 MHz Core M 5Y51 3.5 W 3.5 W / 600 MHz 6 W / 1.3 GHz 300 MHz 900 MHz 5Y31 4.5 W / 900 MHz 6 W / 1.1 GHz 2.4 GHz 850 MHz 5Y10c 4.5 W / 800 MHz 6 W / 1 GHz 2.0 GHz 800 MHz 5Y10a rowspan=2 rowspan=2 100 MHz 5Y10 4 W / ? MHz <li>When a cooler or quieter mode of operation is desired, this mode specifies a lower TDP and lower guaranteed frequency versus the nominal mode. <li>This is the processor's rated frequency and TDP. <li>When extra cooling is available, this mode specifies a higher TDP and higher guaranteed frequency versus the nominal mode.

Server processors

SoC processors

Processor brandingModel Cores(threads) Basefrequency Turbofrequency TDP Socket Memory L3cache Release date Price(USD) Single core All cores Type Channel Xeon D D-1587 16 (32) 1.7 GHz rowspan="28" 2.3 GHz 65 W FCBGA 1667 DDR4up to128 GBw/ ECCsupport Dual 24 MB Q1 2016 $1754 D-1577 1.3 GHz 2.1 GHz 45 W Q1 2016 $1477 D-1571 1.3 GHz 2.1 GHz Q1 2016 $1222 D-1567 12 (24) 2.1 GHz 2.7 GHz 65 W 18 MB Q1 2016 $1299 D-1559 1.5 GHz 2.1 GHz 45 W Q2 2016 $883 D-1557 1.5 GHz 2.1 GHz Q1 2016 $844 D-1553N 8 (16) 2.3 GHz 2.7 GHz 65 W 12 MB Q3 2017 $855 D-1548 2.0 GHz 2.6 GHz 45 W Q4 2015 $675 D-1543N 1.9 GHz 2.4 GHz Q3 2017 $652 D-1541 2.1 GHz 2.7 GHz Q4 2015 $581 D-1540 2.0 GHz 2.6 GHz Q1 2015 $581 D-1539 1.6 GHz 2.2 GHz 35 W Q2 2016 $590 D-1537 1.7 GHz 2.3 GHz Q4 2015 $571 D-1533N 6 (12) 2.1 GHz 2.7 GHz 45 W 9 MB Q3 2017 $470 D-1531 2.2 GHz 2.7 GHz Q4 2015 $348 D-1529 4 (8) 1.3 GHz 1.3 GHz 20 W 6 MB Q2 2016 $324 D-1528 6 (12) 1.9 GHz 2.5 GHz 35 W 9 MB Q4 2015 $389 D-1527 4 (8) 2.2 GHz 2.7 GHz 6 MB Q4 2015 $259 D-1523N 2.0 GHz 2.6 GHz 45 W Q3 2017 $256 D-1521 2.4 GHz 2.7 GHz Q4 2015 $199 D-1520 2.2 GHz 2.6 GHz Q1 2015 $199 D-1518 2.2 GHz 2.2 GHz 35 W Q4 2015 $234 D-1513N 1.6 GHz 2.2 GHz Q3 2017 $192 Pentium D D1519 1.5 GHz 2.1 GHz 25 W Q2 2016 $200 D1517 1.6 GHz 2.2 GHz Q4 2015 $194 D1509 2 (2) 1.5 GHz TBA 19 W 3 MB $156 D1508 2 (4) 2.2 GHz 2.6 GHz 25 W $129 D1507 2 (2) 1.2 GHz TBA 20 W $103

Server CPUs ProcessorbrandingModel Cores(threads) GPUmodel CPUclock rate Graphicsclock rate L3cache TDP Releasedate Releaseprice(USD)tray / box Motherboard Normal Turbo Normal Turbo Socket Interface Memory Xeon E3 v4 1285v4 4 (8)Iris Pro P6300 3.5 GHz 3.8 GHz 300 MHz 1.15 GHz 6 MB 95 W Q2 15 $556 / — LGA1150 DMI 2.0PCIe 3.0 DDR3 or DDR3L 1333/1600/1866with ECC 1285Lv4 3.4 GHz 65 W $445 / — 1265Lv4 2.3 GHz 3.3 GHz 1.05 GHz 35 W $417 / —

Single/dual socket CPUs

Socket: LGA 2011-3 Just like Haswell-EP, the Broadwell-EP Xeon E5 has three different die configurations. The largest die (454 mm2), and highest core count (16 - 22) SKUs still work with a two-ring configuration connected by two bridges. The second configuration supports 12 to 15 cores and is a smaller version (306mm2). These dies still have two memory controllers. The smallest 10-core die uses only one dual ring, two columns of cores, and only one memory controller. Interface: PCIe 3.0

ProcessorbrandingModel Cores(threads) CPU clock rate L3cache TDP Releasedate ReleasepriceSocketsMemory