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Core i7-4500U vs Celeron 3855U


Description
The i7-4500U is based on Haswell architecture while the 3855U is based on Skylake.

Using the multithread performance as a reference, the i7-4500U gets a score of 49.8 k points while the 3855U gets 24.6 k points.

Summarizing, the i7-4500U is 2 times faster than the 3855U. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
40651
406e3
Core
Haswell
Skylake-U
Architecture
Base frecuency
1.8 GHz
1.6 GHz
Boost frecuency
3 GHz
1.6 GHz
Socket
BGA1168
BGA1356
Cores/Threads
2 /2
2/2
TDP
15 W
15 W
Cache L1 (d+i)
32+32 kB
2x32+2x32 kB
Cache L2
256 kB
2x256 kB
Cache L3
4096 kB
2096 kB
Date
Jun 2013
December 2015

Non-optimized benchmark
The benchmark in Mode 0 (FPU) measures cpu performance with non-optimized software. It uses the basic µinstructions from the i386 architecture with the i387 floating point unit. This mode is compatible with all CPUs so it's practical to compare very different CPUs
Monothread
i7-4500U
3855U
Test#1 (Integers)
3313
1643 (-50.40%)
Test#2 (FP)
8374
6721 (-19.74%)
Test#3 (Generic, ZIP)
3680
2063 (-43.93%)
Test#1 (Memory)
3343
2404 (-28.10%)
TOTAL
18711
12831 (-31.42%)

Multithread

i7-4500U

3855U
Test#1 (Integers)
5207
2196 (-57.83%)
Test#2 (FP)
18544
9586 (-48.31%)
Test#3 (Generic, ZIP)
7797
2758 (-64.63%)
Test#1 (Memory)
3545
2270 (-35.96%)
TOTAL
35092
16809 (-52.10%)

SSE3 optimized benchmark
The benchmark in mode I (SSE) is optimized for the use of SIMD instructions with 128 bits register and the SSE set up to version 3. Nearly every modern CPU has support for this mode.
Monothread
i7-4500U
3855U
Test#1 (Integers)
10196
5930 (-41.84%)
Test#2 (FP)
9233
8533 (-7.59%)
Test#3 (Generic, ZIP)
3894
2277 (-41.53%)
Test#1 (Memory)
3291
2499 (-24.05%)
TOTAL
26614
19239 (-27.71%)

Multithread

i7-4500U

3855U
Test#1 (Integers)
19204
7867 (-59.03%)
Test#2 (FP)
19017
11283 (-40.67%)
Test#3 (Generic, ZIP)
8308
2910 (-64.97%)
Test#1 (Memory)
3222
2496 (-22.54%)
TOTAL
49751
24556 (-50.64%)

Performance/W
i7-4500U
3855U
Test#1 (Integers)
1280 points/W
524 points/W
Test#2 (FP)
1268 points/W
752 points/W
Test#3 (Generic, ZIP)
554 points/W
194 points/W
Test#1 (Memory)
215 points/W
166 points/W
TOTAL
3317 points/W
1637 points/W

Performance/GHz
i7-4500U
3855U
Test#1 (Integers)
3399 points/GHz
3706 points/GHz
Test#2 (FP)
3078 points/GHz
5333 points/GHz
Test#3 (Generic, ZIP)
1298 points/GHz
1423 points/GHz
Test#1 (Memory)
1097 points/GHz
1562 points/GHz
TOTAL
8871 points/GHz
12024 points/GHz

Monothread performance graph
Monothread performance graphics gives the performance vs time. They are useful to measure the time it takes to the CPU to reach the maximum performance.

Usually, CPU's performance will be steady during these tests but if it has a slow frequency strategy, the first samples will show a lower score.


Test#1 (Integers) [points vs time]

grafica bm.hardlimit.com


Test#2 (FP) [points vs time]

grafica bm.hardlimit.com


Test#3 (Generic, ZIP) [points vs time]

grafica bm.hardlimit.com


Test#1 (Memory) [points vs time]

grafica bm.hardlimit.com

Multithread performance graph
Multithread graphs measure the performance against a heavy load during certain time.

If CPU's TDP doesn't limit the frequency and the machine is properly cooled, performance should remain steady vs time. Otherwise, the performance score will oscillate or decrease over time.


Test#1 (Integers) [points vs time]

grafica bm.hardlimit.com


Test#2 (FP) [points vs time]

grafica bm.hardlimit.com


Test#3 (Generic, ZIP) [points vs time]

grafica bm.hardlimit.com


Test#1 (Memory) [points vs time]

grafica bm.hardlimit.com

Hardlimit Benchmark Central - Ver. 3.7.8