Celeron 3855U vs Core i7-640LM
Description
The 3855U is based on Skylake architecture while the i7-640LM is based on Westmere.
Using the multithread performance as a reference, the 3855U gets a score of 24.6 k points while the i7-640LM gets 31.7 k points.
Summarizing, the i7-640LM is 1.3 times faster than the 3855U. To get a proper comparison between both models, take a look to the data shown below.
Using the multithread performance as a reference, the 3855U gets a score of 24.6 k points while the i7-640LM gets 31.7 k points.
Summarizing, the i7-640LM is 1.3 times faster than the 3855U. To get a proper comparison between both models, take a look to the data shown below.
Specs
CPUID
406e3
20655
Core
Skylake-U
Calpella
Base frecuency
1.6 GHz
2.133 GHz
Boost frecuency
1.6 GHz
2.667 GHz
Socket
BGA1356
BGA1288
Cores/Threads
2/2
2/4
TDP
15 W
25 W
Cache L1 (d+i)
2x32+2x32 kB
2x32+2x32 kB
Cache L2
2x256 kB
2x256 kB
Cache L3
2096 kB
4096 kB
Date
December 2015
January 2010
Mean monothread perf.
19.24k points
16.35k points
Mean multithread perf.
24.56k points
31.74k points
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
3855U
i7-640LM
Test#1 (Integers)
5.93k
7.01k (x1.18)
Test#2 (FP)
8.53k
4.58k (x0.54)
Test#3 (Generic, ZIP)
2.28k
2.73k (x1.2)
Test#1 (Memory)
2.5k
2.03k (x0.81)
TOTAL
19.24k
16.35k (x0.85)
Multithread
3855U
i7-640LM
Test#1 (Integers)
7.87k
12.93k (x1.64)
Test#2 (FP)
11.28k
10.21k (x0.91)
Test#3 (Generic, ZIP)
2.91k
6.22k (x2.14)
Test#1 (Memory)
2.5k
2.37k (x0.95)
TOTAL
24.56k
31.74k (x1.29)
Performance/W
3855U
i7-640LM
Test#1 (Integers)
524 points/W
517 points/W
Test#2 (FP)
752 points/W
409 points/W
Test#3 (Generic, ZIP)
194 points/W
249 points/W
Test#1 (Memory)
166 points/W
95 points/W
TOTAL
1637 points/W
1269 points/W
Performance/GHz
3855U
i7-640LM
Test#1 (Integers)
3706 points/GHz
2627 points/GHz
Test#2 (FP)
5333 points/GHz
1718 points/GHz
Test#3 (Generic, ZIP)
1423 points/GHz
1024 points/GHz
Test#1 (Memory)
1562 points/GHz
762 points/GHz
TOTAL
12024 points/GHz
6130 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.
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]
Test#2 (FP) [points vs time]
Test#3 (Generic, ZIP) [points vs time]
Test#1 (Memory) [points vs time]
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.
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]
Test#2 (FP) [points vs time]
Test#3 (Generic, ZIP) [points vs time]
Test#1 (Memory) [points vs time]
Hardlimit Benchmark Central - Ver. 3.11.4