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Intel Core M-5Y31

Intel 5Y31

The Intel Core M-5Y31 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 0.9 - 2.4 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.

Using the "configurable TDP" feature, the 5Y31 can be clocked at 1.1 GHz base clock at a higher TDP (it seems like Apple is using this feature in the base model of the 12-inch MacBook Retina 2015).

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-5Y31 offers a very wide turbo range from 0.9 - 2.4 GHz. However, the actual frequency is largely limited by the TDP. While the CPU is similar to a Core i5-4200U (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-5Y31 will 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 - 850 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 prevents significant performance boosts over the older HD 4200 under continuous 3D load. Current games as of 2014/2015 will be playable in lowest settings only.

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-5Y31 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: 1.1 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
Clock Rate900 - 2400 MHz
Level 1 Cache128 KB
Level 2 Cache512 KB
Level 3 Cache4096 KB
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 - 850 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 - 850 MHz)
64 Bit64 Bit support
Hardware VirtualizationVT-x, VT-d
Announcement Date12/01/2014
Product Link (external)Intel Core M 5Y31

Benchmarks

Octane V2 - Total Score
0%
100%
min: 10827     avg: 13362.5 (30%)     median: 13362.5 (30%)     max: 15898 Points
Cinebench R15 - CPU Single 64Bit
0%
100%
min: 79     avg: 93.3 (42%)     median: 98 (44%)     max: 98 Points
Cinebench R15 - CPU Multi 64Bit
0%
100%
min: 148     avg: 193.8 (10%)     median: 208 (11%)     max: 211 Points
Mozilla Kraken 1.1 - Total Score
0%
100%
min: 2660.9     avg: 2873.3 (5%)     median: 2873.3 (5%)     max: 3085.7 ms
Geekbench 3 - 32 Bit Multi-Core Score
0%
100%
min: 3476     avg: 3821 (12%)     median: 3821 (12%)     max: 4166 Points
Geekbench 3 - 32 Bit Single-Core Score
0%
100%
min: 2088     avg: 2179 (47%)     median: 2179 (47%)     max: 2270 Points
Geekbench 3 - 64 Bit Multi-Core Score
0%
100%
min: 4361     avg: 4361 (13%)     median: 4361 (13%)     max: 4361 Points
Geekbench 3 - 64 Bit Single-Core Score
0%
100%
min: 2428     avg: 2428 (51%)     median: 2428 (51%)     max: 2428 Points
3DMark - Fire Strike Physics 1920x1080
0%
100%
min: 2662     avg: 3012 (14%)     median: 3012 (14%)     max: 3362 Points
3DMark - Cloud Gate Standard Physics 1280x720
0%
100%
min: 1874     avg: 2134 (5%)     median: 2134 (5%)     max: 2394 Points
3DMark - Ice Storm Unlimited Physics 1280x720 offscreen
0%
100%
min: 28626     avg: 28626 (41%)     median: 28626 (41%)     max: 28626 Points
3DMark - Ice Storm Extreme Physics 1920x1080
0%
100%
min: 26675     avg: 26675 (40%)     median: 26675 (40%)     max: 26675 Points
3DMark - Ice Storm Standard Physics 1280x720
0%
100%
min: 21639     avg: 24194.5 (16%)     median: 24194.5 (16%)     max: 26750 Points
Sunspider - 1.0 Total Score
0%
100%
min: 145     avg: 183.5 (5%)     median: 183.5 (5%)     max: 222 ms
TrueCrypt - Serpent Mean 100MB
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100%
min: 0.113     avg: 0.1 (6%)     median: 0.1 (7%)     max: 0.113 GB/s
TrueCrypt - Twofish Mean 100MB
0%
100%
min: 0.197     avg: 0.2 (12%)     median: 0.2 (12%)     max: 0.197 GB/s
TrueCrypt - AES Mean 100MB
0%
100%
min: 1.2     avg: 1.2 (11%)     median: 1.2 (11%)     max: 1.2 GB/s
X264 HD Benchmark 4.0 - Pass 2
0%
100%
min: 9.52     avg: 9.5 (9%)     median: 9.5 (9%)     max: 9.52 fps
X264 HD Benchmark 4.0 - Pass 1
0%
100%
min: 71.98     avg: 72 (31%)     median: 72 (31%)     max: 71.98 fps
WinRAR - Result
0%
100%
min: 1745     avg: 1745 (21%)     median: 1745 (21%)     max: 1745 KB/s
3DMark 11 - Performance Physics 1280x720
0%
100%
min: 1290     avg: 1738.5 (11%)     median: 1738.5 (11%)     max: 2187 points
3DMark Vantage - P CPU no PhysX 1280x1024
0%
100%
min: 3111     avg: 3111 (8%)     median: 3111 (8%)     max: 3111 Points
3DMark 06 - CPU -
0%
100%
min: 2589     avg: 2589 (24%)     median: 2589 (24%)     max: 2589 Points
Cinebench R11.5 - CPU Single 64Bit
0%
100%
min: 0.93     avg: 1.1 (48%)     median: 1.1 (49%)     max: 1.15 Points
Cinebench R11.5 - CPU Multi 64Bit
0%
100%
min: 1.67     avg: 2.1 (10%)     median: 2.2 (11%)     max: 2.3 Points
Cinebench R10 - Rendering Single 32Bit
0%
100%
min: 3123     avg: 3395.5 (46%)     median: 3395.5 (46%)     max: 3668 Points
Cinebench R10 - Rendering Multiple CPUs 32Bit
0%
100%
min: 5280     avg: 6563 (16%)     median: 6563 (16%)     max: 7846 Points
Super Pi mod 1.5 XS 1M -
0%
100%
min: 15.9     avg: 15.9 (3%)     median: 15.9 (3%)     max: 15.9 Seconds
Super Pi mod 1.5 XS 2M -
0%
100%
min: 36.322     avg: 36.3 (2%)     median: 36.3 (2%)     max: 36.322 Seconds
Super Pi Mod 1.5 XS 32M -
0%
100%
min: 998.058     avg: 998.1 (4%)     median: 998.1 (4%)     max: 998.058 Seconds
- Range of benchmark values for this graphics card
- Average benchmark values for this graphics card

Reviews for the Intel Core M 5Y31 processor

Apple MacBook 12 (Early 2015) 1.1 GHz (Intel HD Graphics 5300, 12")
» Apple MacBook 12 (Early 2015) Notebook Preview - Review
» Apple MacBook 12 (Early 2015) 1.1 GHz Review - Review
» Apple MacBook 12 (Early 2015) 1.1 GHz - External Review

Fujitsu Stylistic Q665 (Intel HD Graphics 5300, 11.6")
» Fujitsu Stylistic Q665 Tablet Review - Review
» Fujitsu Stylistic Q665 - External Review

Samsung 930X2K-K02US (Intel HD Graphics 5300, 12.2")
» Samsung 930X2K-K02US - External Review

Toshiba Portege Z20t-B-10E (Intel HD Graphics 5300, 12.5")
» Toshiba Portege Z20t-B-10E - External Review

» Mobile CPU Comparison
Comparison of all mobile CPU series

» Mobile Processors - Benchmarklist
Benchmarklist of all known CPUs that are used in laptops (desktop and laptop CPUs)

Other CPUs of the series Intel Core M

» Intel Core M 5Y71
   1.2 GHz / 0.5 MB + 4 MB
» Intel Core M 5Y51
   1.1 GHz / 0.5 MB + 4 MB
» Intel Core M 5Y70
   1.1 GHz / 0.5 MB + 4 MB
» Intel Core M 5Y31
   0.9 GHz / 0.5 MB + 4 MB
» Intel Core M 5Y10c
   0.8 GHz / 0.5 MB + 4 MB
» Intel Core M 5Y10a
   0.8 GHz / 0.5 MB + 4 MB
» Intel Core M 5Y10
   0.8 GHz / 0.5 MB + 4 MB

Surrounding CPUs

- Intel Core M 5Y51
   1.1 GHz / 0.5 MB + 4 MB
- Intel Core M 5Y70
   1.1 GHz / 0.5 MB + 4 MB
- AMD Kaveri FX-7500
   2.1 GHz / 4 MB
- AMD Kaveri A10 Pro-7350B
   2.1 GHz / 4 MB
- Intel Celeron 1020E
   2.2 GHz / 0.5 MB + 2 MB
» Intel Core M 5Y31
   0.9 GHz / 0.5 MB + 4 MB
+ Intel Core M 5Y10c
   0.8 GHz / 512 KB + 4096 KB
+ Intel Core M 5Y10a
   0.8 GHz / 512 KB + 4096 KB
+ AMD Phenom II X4 X920 BE
   2.3 GHz / 2048 KB
+ Intel Core M 5Y10
   0.8 GHz / 512 KB + 4096 KB
+ Kirin 960
   2.4 GHz / KB
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> Notebook / Laptop Reviews and News > Benchmarks / Tech > Notebook Processors > Intel Core M 5Y31 SoC
Klaus Hinum (Update: 2014-11- 1)