Intel Core M-5Y70 vs Intel Core M-5Y51

Intel Core M-5Y70

► remove Intel 5Y70

The Intel Core M-5Y70 is an ULV (ultra-low voltage) dual-core SoC based on the Broadwell architecture launched in September 2014. Thanks to its TDP of just 4.5 W (configurable), the CPU is suited also 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 integrates an HD Graphics 5300 GPU and a dual-channel LPDDR3/DDR3L(-RS) memory controller up to 25.6 GB/s. The Core M 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-5Y70 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 i5-4200U (Haswell, 15 W) in short benchmarks, its performance begins 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-5Y70 is 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 100 - 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 is also limited by the TDP, which prevents significant performance boosts over the older HD 4200 under continuous 3D load. Only a few games as of 2014 are 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-5Y70 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, affacting clock rates and performance. The CPU can be passively cooled even in thin tablets.

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-5Y70Intel Core M-5Y51
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-5Y701100 - 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
Intel Core M-5Y71 (compare)1200 - 2900 MHz2 / 44 MB
» Intel Core M-5Y511100 - 2600 MHz2 / 44 MB
Intel Core M-5Y701100 - 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
1100 - 2600 MHz1100 - 2600 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
BGAFCBGA1234
HD Graphics 5300 (100 - 850 MHz), Dual-Channel DDR3L(-RS)/LPDDR3 Memory Controller (max. 800 MHz, 25.6 GB/s), HyperThreading, AVX, AVX2, Quick Sync, Virtualization, AES-NI, vProHD 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
iGPUIntel HD Graphics 5300 (100 - 850 MHz)Intel HD Graphics 5300 (300 - 900 MHz)
Intel Core M 5Y70Intel Core M 5Y51

Cinebench R15 - CPU Multi 64Bit
100%
5Y70 +
min: 180     avg: 182     median: 182 (4%)     max: 184 Points
min: 144     avg: 149.7     median: 152 (3%)     max: 153 Points
Cinebench R15 - CPU Single 64Bit
100%
5Y70 +
min: 90     avg: 91     median: 91 (42%)     max: 92 Points
min: 81     avg: 83     median: 84 (39%)     max: 84 Points
Cinebench R11.5 - CPU Multi 64Bit
100%
5Y70 +
min: 1     avg: 2.2     median: 2 (5%)     max: 2 Points
1.7 Points (4%)
Cinebench R11.5 - CPU Single 64Bit
100%
5Y70 +
1.1 Points (55%)
1 Points (48%)
Cinebench R10 - Rendering Single 32Bit
100%
5Y70 +
min: 3629     avg: 3741     median: 3741 (38%)     max: 3853 Points
min: 3111     avg: 3192.3     median: 3190 (33%)     max: 3276 Points
Cinebench R10 - Rendering Multiple CPUs 32Bit
100%
5Y70 +
min: 5977     avg: 6375     median: 6375 (10%)     max: 6773 Points
min: 5046     avg: 5235.7     median: 5291 (8%)     max: 5370 Points
Cinebench R10 - Rendering Multiple CPUs 64Bit
100%
5Y70 +
8939 Points (12%)
min: 6557     avg: 6621.5     median: 6621 (9%)     max: 6686 Points
Cinebench R10 - Rendering Single CPUs 64Bit
100%
5Y70 +
5195 Points (50%)
min: 4097     avg: 4142     median: 4142 (40%)     max: 4187 Points
wPrime 2.0x - 1024m *
100%
5Y70 +
980.8 seconds (12%)
100%
5Y51 +
979.5 seconds (12%)
wPrime 2.0x - 32m *
100%
5Y70 +
19.4 seconds (4%)
25.9 seconds (5%)
WinRAR - Result
100%
5Y70 +
2385 KB/s (28%)
2048 KB/s (24%)
X264 HD Benchmark 4.0 - Pass 2
100%
5Y70 +
11.6 fps (7%)
min: 8     avg: 9.2     median: 9 (5%)     max: 9 fps
X264 HD Benchmark 4.0 - Pass 1
100%
5Y70 +
91.4 fps (34%)
min: 50     avg: 54.9     median: 54 (20%)     max: 59 fps
TrueCrypt - Serpent Mean 100MB
0.2 GB/s (8%)
0.1 GB/s (6%)
TrueCrypt - Twofish Mean 100MB
0.3 GB/s (9%)
0.2 GB/s (6%)
TrueCrypt - AES Mean 100MB
100%
5Y70 +
1.6 GB/s (8%)
100%
5Y51 +
1.1 GB/s (6%)
3DMark 06 - CPU
100%
5Y70 +
2386 Points (16%)
min: 2101     avg: 2127     median: 2127 (14%)     max: 2153 Points
Super Pi mod 1.5 XS 1M *
100%
5Y70 +
14.6 Seconds (3%)
100%
5Y51 +
15.4 Seconds (3%)
Super Pi mod 1.5 XS 2M *
100%
5Y70 +
33 Seconds (1%)
100%
5Y51 +
35.4 Seconds (2%)
Super Pi Mod 1.5 XS 32M *
100%
5Y70 +
837 Seconds (4%)
100%
5Y51 +
min: 887     avg: 897.6     median: 902 (4%)     max: 903 Seconds
3DMark Vantage - P CPU no PhysX 1280x1024
100%
5Y70 +
5992 Points (8%)
3DMark 11 - Performance Physics 1280x720
100%
5Y70 +
min: 2320     avg: 2370.7     median: 2373 (12%)     max: 2419 points
min: 2102     avg: 2116.7     median: 2122 (11%)     max: 2126 points
3DMark - Ice Storm Standard Physics 1280x720
100%
5Y70 +
min: 20946     avg: 22530.7     median: 22277 (14%)     max: 24369 Points
min: 19769     avg: 20120     median: 20212 (13%)     max: 20379 Points
3DMark - Ice Storm Unlimited Physics 1280x720 offscreen
100%
5Y70 +
35144 Points (41%)
3DMark - Cloud Gate Standard Physics 1280x720
100%
5Y70 +
min: 1531     avg: 1993.3     median: 2207 (6%)     max: 2242 Points
min: 1717     avg: 1744.3     median: 1753 (4%)     max: 1763 Points
3DMark - Fire Strike Physics 1920x1080
100%
5Y70 +
min: 2464     avg: 2575.3     median: 2602 (8%)     max: 2660 Points
min: 2436     avg: 2456     median: 2456 (8%)     max: 2476 Points
Geekbench 2 - 32 Bit - Stream
100%
5Y70 +
7151 Points (58%)
6019 Points (49%)
Geekbench 2 - 32 Bit - Memory
100%
5Y70 +
5799 Points (53%)
4751 Points (43%)
Geekbench 2 - 32 Bit - Floating Point
100%
5Y70 +
5147 Points (9%)
4050 Points (7%)
Geekbench 2 - 32 Bit - Integer
100%
5Y70 +
5488 Points (9%)
4063 Points (7%)
Geekbench 2 - 32 Bit - Total Score
100%
5Y70 +
5597 Points (13%)
4391 Points (10%)
Geekbench 3 - 32 Bit Multi-Core Score
100%
5Y70 +
min: 3795     avg: 4150     median: 4150 (5%)     max: 4505 Points
3454 Points (4%)
Geekbench 3 - 32 Bit Single-Core Score
100%
5Y70 +
min: 2249     avg: 2378     median: 2378 (49%)     max: 2507 Points
2093 Points (43%)
Mozilla Kraken 1.1 - Total Score *
100%
5Y70 +
min: 1586     avg: 1869.7     median: 1799 (3%)     max: 2222 ms
min: 2898     avg: 2913     median: 2912 (5%)     max: 2927 ms
Sunspider - 1.0 Total Score *
100%
5Y70 +
min: 104     avg: 140.1     median: 120 (1%)     max: 195 ms
100%
5Y51 +
min: 124     avg: 128.9     median: 128 (1%)     max: 133 ms
Octane V2 - Total Score
100%
5Y70 +
min: 11188     avg: 17293.3     median: 16925 (32%)     max: 23767 Points
min: 10346     avg: 10406.5     median: 10406 (20%)     max: 10467 Points

Average Benchmarks Intel Core M-5Y70 → 100%

Average Benchmarks Intel Core M-5Y51 → 83%

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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)