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Intel Core M-5Y51

Intel 5Y51

The Intel Core M-5Y51 is an ULV (ultra-low voltage) dual-core SoC based on the Broadwell architecture launched in late 2014. Thanks to its TDP of just 4.5 W (configurable), the CPU is suited for passively cooled tablets and 2-in-1 notebooks. In addition to two CPU cores with Hyper-Threading clocked at 1.1 - 2.6 GHz, the chip also integrates an HD Graphics 5300 GPU and a dual-channel LPDDR3/DDR3L(-RS) memory controller up to 25.6 GB/s. The chip is manufactured in a 14 nm process with FinFET transistors.

Architecture

Broadwell represents the "Tick" in Intel's Tick-Tock model, which means a shrink of its predecessor Haswell. The new 14 nm manufacturing process with three-dimensional FinFET transistors allows not only improvements in energy efficiency, but also a significantly smaller die size fit for more compact packages and devices.

Further advantages result from the revised microarchitecture of Broadwell. Due to its improved branch prediction, bigger buffer sizes (1500 instead of 1000 entries in the L2 TLB) and other tweaks, the performance per clock has been increased by more than 5 percent over its predecessor. There are also some new instruction set extensions designed for cryptographic applications.

Performance 

The Core M-5Y51 offers a very wide turbo range from 1.1 - 2.6 GHz; however, the actual frequency is largely limited by the TDP. While the CPU is similar to a Core i5-4300U (Haswell, 15 W) in short benchmarks, its performance will begin to degrade under continuous full load. Accordingly, the main purpose of Broadwell's higher power efficiency is to reduce power consumption instead of improving raw performance.

Overall, the Core M-5Y51 should be sufficient for office and multimedia purposes as well as more demanding applications.

Graphics

The integrated HD Graphics 5300 offers 24 Execution Units (EUs) clocked at 300 - 900 MHz. Similar to the CPU core, the GPU architecture (Intel Gen 8) has been thoroughly revised for improved performance-per-clock. However, the GPU frequency will be also limited by the TDP, which will prevent significant performance boosts over the older HD 4200 under continuous 3D load. Current games as of 2014 should be playable in low settings and XGA resolution.

Broadwell is the first Intel chip to fully support DirectX 11.2 as well as OpenCL 1.3/2.0 and OpenGL 4.3. Video will output natively via DisplayPort 1.2 or HDMI 1.4a. However, the new HDMI 2.0 standard is not officially supported.

Power Consumption

With a TDP of only 4.5 W, the Core M-5Y51 draws noticeably less power than the Haswell Y-series (11.5 W). However, the TDP can be set to different values such as 3.5 or 6 W, affecting clock rates and performance (6 W: 1.3 GHz base clock, 3.5 W: 0.6 GHz base clock). The CPU can be passively cooled even in thin tablets.

SeriesIntel Core M
CodenameBroadwell
Series: Core M Broadwell
Intel Core M-5Y71 (compare)1200 - 2900 MHz2 / 44 MB
» Intel Core M-5Y511100 - 2600 MHz2 / 44 MB
Intel Core M-5Y70 (compare)1100 - 2600 MHz2 / 44 MB
Intel Core M-5Y31 (compare)900 - 2400 MHz2 / 44 MB
Intel Core M-5Y10c (compare)800 - 2000 MHz2 / 44 MB
Intel Core M-5Y10a (compare)800 - 2000 MHz2 / 44 MB
Intel Core M-5Y10 (compare)800 - 2000 MHz2 / 44 MB
Clock Rate1100 - 2600 MHz
Level 1 Cache128 KB
Level 2 Cache512 KB
Level 3 Cache4 MB
Number of Cores / Threads2 / 4
Max. Power Consumption (TDP = Thermal Design Power)4.5 Watt
Transistor Count1300 Million
Manufacturing Technology14 nm
Die Size82 mm2
Max. Temperature95 °C
SocketFCBGA1234
FeaturesHD Graphics 5300 (300 - 900 MHz), Dual-Channel DDR3L(-RS)/LPDDR3 Memory Controller (max. 800 MHz, 25.6 GB/s), HyperThreading, AVX, AVX2, Quick Sync, Virtualization, AES-NI
GPUIntel HD Graphics 5300 (300 - 900 MHz)
64 Bit64 Bit support
Announcement Date12/01/2014
Product Link (external)Intel Core M 5Y51

Benchmarks

Cinebench R15 - CPU Multi 64Bit
min: 144     avg: 149.7     median: 152 (7%)     max: 153 Points
Cinebench R15 - CPU Single 64Bit
min: 81     avg: 83     median: 84 (43%)     max: 84 Points
Cinebench R11.5 - CPU Multi 64Bit
min: 1.6     avg: 1.7     median: 1.7 (7%)     max: 1.72 Points
Cinebench R11.5 - CPU Single 64Bit
min: 0.94     avg: 1     median: 1 (43%)     max: 0.99 Points
Cinebench R10 - Rendering Single 32Bit
min: 3111     avg: 3192.3     median: 3190 (40%)     max: 3276 Points
Cinebench R10 - Rendering Multiple CPUs 32Bit
min: 5046     avg: 5235.7     median: 5291 (11%)     max: 5370 Points
Cinebench R10 - Rendering Multiple CPUs 64Bit
min: 6557     avg: 6621.5     median: 6621.5 (16%)     max: 6686 Points
Cinebench R10 - Rendering Single CPUs 64Bit
min: 4097     avg: 4142     median: 4142 (33%)     max: 4187 Points
X264 HD Benchmark 4.0 - Pass 2
min: 8.94     avg: 9.2     median: 9.2 (5%)     max: 9.43 fps
X264 HD Benchmark 4.0 - Pass 1
min: 50     avg: 54.9     median: 54.9 (23%)     max: 59.74 fps
3DMark 06 - CPU
min: 2101     avg: 2127     median: 2127 (17%)     max: 2153 Points
Super Pi mod 1.5 XS 1M *
min: 15     avg: 15.4     median: 15.5 (3%)     max: 15.616 Seconds
Super Pi mod 1.5 XS 2M *
min: 35     avg: 35.4     median: 35.3 (2%)     max: 35.771 Seconds
Super Pi Mod 1.5 XS 32M *
min: 887.23     avg: 897.6     median: 902 (4%)     max: 903.523 Seconds
3DMark 11 - Performance Physics 1280x720
min: 2102     avg: 2116.7     median: 2122 (13%)     max: 2126 points
3DMark - Ice Storm Standard Physics 1280x720
min: 19769     avg: 20120     median: 20212 (13%)     max: 20379 Points
3DMark - Cloud Gate Standard Physics 1280x720
min: 1717     avg: 1744.3     median: 1753 (4%)     max: 1763 Points
3DMark - Fire Strike Physics 1920x1080
min: 2436     avg: 2456     median: 2456 (11%)     max: 2476 Points
Mozilla Kraken 1.1 - Total Score *
min: 2898.3     avg: 2913     median: 2913 (5%)     max: 2927.6 ms
Sunspider - 1.0 Total Score *
min: 124.3     avg: 128.9     median: 128.9 (3%)     max: 133.4 ms
Octane V2 - Total Score
min: 10346     avg: 10406.5     median: 10406.5 (22%)     max: 10467 Points
- Range of benchmark values for this graphics card
- Average benchmark values for this graphics card
* Smaller numbers mean a higher performance

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