Intel Core M-5Y51 vs Intel Core M-5Y31

Intel Core M-5Y51

► remove 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.

Intel Core M-5Y31

► remove 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.

Intel Core M-5Y51Intel Core M-5Y31
Intel Core MIntel Core M
BroadwellBroadwell
: 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-5Y31900 - 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
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-5Y31900 - 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
1100 - 2600 MHz900 - 2400 MHz
128 KB128 KB
512 KB512 KB
4 MB4 MB
2 / 42 / 4
4.5 4.5
1300 1300
14 14
82 mm282 mm2
95 °C95 °C
FCBGA1234FCBGA1234
HD 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-NIHD 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
iGPUIntel HD Graphics 5300 (300 - 900 MHz)Intel HD Graphics 5300 (300 - 850 MHz)
Intel Core M 5Y51Intel Core M 5Y31

Cinebench R15 - CPU Multi 64Bit
100%
5Y51 +
min: 144     avg: 150     median: 152 (3%)     max: 153 Points
137%
5Y31 +
min: 148     avg: 194     median: 208 (5%)     max: 211 Points
Cinebench R15 - CPU Single 64Bit
100%
5Y51 +
min: 81     avg: 83     median: 84 (39%)     max: 84 Points
117%
5Y31 +
min: 79     avg: 93.3     median: 98 (45%)     max: 98 Points
Cinebench R11.5 - CPU Multi 64Bit
100%
5Y51 +
min: 1.6     avg: 1.7     median: 1.7 (4%)     max: 1.72 Points
133%
5Y31 +
min: 1.67     avg: 2.1     median: 2.2 (6%)     max: 2.3 Points
Cinebench R11.5 - CPU Single 64Bit
100%
5Y51 +
min: 0.94     avg: 1     median: 1 (39%)     max: 0.99 Points
113%
5Y31 +
min: 0.93     avg: 1.1     median: 1.1 (44%)     max: 1.15 Points
Cinebench R10 - Rendering Single 32Bit
100%
5Y51 +
min: 3111     avg: 3192     median: 3190 (33%)     max: 3276 Points
106%
5Y31 +
min: 3123     avg: 3396     median: 3395.5 (35%)     max: 3668 Points
Cinebench R10 - Rendering Multiple CPUs 32Bit
100%
5Y51 +
min: 5046     avg: 5236     median: 5291 (9%)     max: 5370 Points
124%
5Y31 +
min: 5280     avg: 6563     median: 6563 (11%)     max: 7846 Points
Cinebench R10 - Rendering Multiple CPUs 64Bit
100%
5Y51 +
min: 6557     avg: 6622     median: 6621.5 (9%)     max: 6686 Points
Cinebench R10 - Rendering Single CPUs 64Bit
100%
5Y51 +
min: 4097     avg: 4142     median: 4142 (38%)     max: 4187 Points
wPrime 2.0x - 1024m *
100%
5Y51 +
979 seconds (12%)
wPrime 2.0x - 32m *
100%
5Y51 +
25.9 seconds (5%)
WinRAR - Result
100%
5Y51 +
2048 KB/s (24%)
1745 KB/s (20%)
X264 HD Benchmark 4.0 - Pass 2
100%
5Y51 +
min: 8.94     avg: 9.2     median: 9.2 (6%)     max: 9.43 fps
104%
5Y31 +
9.5 fps (6%)
X264 HD Benchmark 4.0 - Pass 1
100%
5Y51 +
min: 50     avg: 54.9     median: 54.9 (19%)     max: 59.74 fps
131%
5Y31 +
72 fps (26%)
TrueCrypt - Serpent Mean 100MB
100%
5Y51 +
0.1 GB/s (6%)
107%
5Y31 +
0.1 GB/s (6%)
TrueCrypt - Twofish Mean 100MB
100%
5Y51 +
0.2 GB/s (0%)
111%
5Y31 +
0.2 GB/s (0%)
TrueCrypt - AES Mean 100MB
100%
5Y51 +
1.1 GB/s (6%)
109%
5Y31 +
1.2 GB/s (6%)
3DMark 06 - CPU
100%
5Y51 +
min: 2101     avg: 2127     median: 2127 (14%)     max: 2153 Points
122%
5Y31 +
2589 Points (17%)
Super Pi mod 1.5 XS 1M *
100%
5Y51 +
min: 15     avg: 15.4     median: 15.5 (3%)     max: 15.616 Seconds
100%
5Y31 +
15.9 Seconds (3%)
Super Pi mod 1.5 XS 2M *
100%
5Y51 +
min: 35     avg: 35.4     median: 35.3 (2%)     max: 35.771 Seconds
100%
5Y31 +
36.3 Seconds (2%)
Super Pi Mod 1.5 XS 32M *
100%
5Y51 +
min: 887.23     avg: 898     median: 902 (4%)     max: 903.523 Seconds
100%
5Y31 +
998 Seconds (4%)
3DMark Vantage - P CPU no PhysX 1280x1024
100%
5Y31 +
3111 Points (4%)
3DMark 11 - Performance Physics 1280x720
100%
5Y51 +
min: 2102     avg: 2117     median: 2122 (10%)     max: 2126 points
min: 1290     avg: 1739     median: 1738.5 (9%)     max: 2187 points
3DMark - Ice Storm Standard Physics 1280x720
100%
5Y51 +
min: 19769     avg: 20120     median: 20212 (13%)     max: 20379 Points
120%
5Y31 +
min: 21639     avg: 24195     median: 24194.5 (16%)     max: 26750 Points
3DMark - Ice Storm Extreme Physics 1920x1080
100%
5Y31 +
26675 Points (32%)
3DMark - Ice Storm Unlimited Physics 1280x720 offscreen
100%
5Y31 +
28626 Points (33%)
3DMark - Cloud Gate Standard Physics 1280x720
100%
5Y51 +
min: 1717     avg: 1744     median: 1753 (4%)     max: 1763 Points
122%
5Y31 +
min: 1874     avg: 2134     median: 2134 (5%)     max: 2394 Points
3DMark - Fire Strike Physics 1920x1080
100%
5Y51 +
min: 2436     avg: 2456     median: 2456 (8%)     max: 2476 Points
123%
5Y31 +
min: 2662     avg: 3012     median: 3012 (10%)     max: 3362 Points
Geekbench 2 - 32 Bit - Stream
100%
5Y51 +
6019 Points (49%)
Geekbench 2 - 32 Bit - Memory
100%
5Y51 +
4751 Points (43%)
Geekbench 2 - 32 Bit - Floating Point
100%
5Y51 +
4050 Points (8%)
Geekbench 2 - 32 Bit - Integer
100%
5Y51 +
4063 Points (8%)
Geekbench 2 - 32 Bit - Total Score
100%
5Y51 +
4391 Points (11%)
Geekbench 3 - 32 Bit Multi-Core Score
100%
5Y51 +
3454 Points (6%)
111%
5Y31 +
min: 3476     avg: 3821     median: 3821 (7%)     max: 4166 Points
Geekbench 3 - 32 Bit Single-Core Score
100%
5Y51 +
2093 Points (43%)
104%
5Y31 +
min: 2088     avg: 2179     median: 2179 (45%)     max: 2270 Points
Geekbench 3 - 64 Bit Multi-Core Score
100%
5Y31 +
4361 Points (7%)
Geekbench 3 - 64 Bit Single-Core Score
100%
5Y31 +
2428 Points (49%)
Mozilla Kraken 1.1 - Total Score *
100%
5Y51 +
min: 2898.3     avg: 2913     median: 2913 (5%)     max: 2927.6 ms
100%
5Y31 +
min: 2660.9     avg: 2873     median: 2873.3 (5%)     max: 3085.7 ms
Sunspider - 1.0 Total Score *
100%
5Y51 +
min: 124.3     avg: 129     median: 128.9 (1%)     max: 133.4 ms
min: 145     avg: 184     median: 183.5 (2%)     max: 222 ms
Octane V2 - Total Score
100%
5Y51 +
min: 10346     avg: 10407     median: 10406.5 (20%)     max: 10467 Points
128%
5Y31 +
min: 10827     avg: 13363     median: 13362.5 (25%)     max: 15898 Points

Average Benchmarks Intel Core M-5Y51 → 100%

Average Benchmarks Intel Core M-5Y31 → 110%

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* Smaller numbers mean a higher performance
1 This benchmark is not used for the average calculation

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Redaktion, 2017-09- 8 (Update: 2017-09-11)