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Celeron 3855U vs Core i5-2520M


Description
The 3855U is based on Skylake architecture while the i5-2520M is based on Sandy Bridge.

Using the multithread performance as a reference, the 3855U gets a score of 16.8 k points while the i5-2520M gets 34.2 k points.

Summarizing, the i5-2520M 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
406e3
206a7
Core
Skylake-U
Sandy Bridge
Architecture
Base frecuency
1.6 GHz
2.5 GHz
Boost frecuency
1.6 GHz
3.2 GHz
Socket
BGA1356
BGA1023
Cores/Threads
2/2
2/2
TDP
15 W
35 W
Cache L1 (d+i)
2x32+2x32 kB
2x32+2x32 kB
Cache L2
2x256 kB
2x256 kB
Cache L3
2096 kB
3072 kB
Date
December 2015
February 2011
Mean monothread perf.
19.24k points
24.13k points
Mean multithread perf.
24.56k points
50.23k points

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
3855U
i5-2520M
Test#1 (Integers)
1.64k
2.69k (x1.64)
Test#2 (FP)
6.72k
7.28k (x1.08)
Test#3 (Generic, ZIP)
2.06k
3.84k (x1.86)
Test#1 (Memory)
2.4k
3.05k (x1.27)
TOTAL
12.83k
16.86k (x1.31)

Multithread

3855U

i5-2520M
Test#1 (Integers)
2.2k
6.08k (x2.77)
Test#2 (FP)
9.59k
16.15k (x1.68)
Test#3 (Generic, ZIP)
2.76k
8.87k (x3.22)
Test#1 (Memory)
2.27k
3.06k (x1.35)
TOTAL
16.81k
34.15k (x2.03)

Performance/W
3855U
i5-2520M
Test#1 (Integers)
146 points/W
174 points/W
Test#2 (FP)
639 points/W
461 points/W
Test#3 (Generic, ZIP)
184 points/W
253 points/W
Test#1 (Memory)
151 points/W
87 points/W
TOTAL
1121 points/W
976 points/W

Performance/GHz
3855U
i5-2520M
Test#1 (Integers)
1027 points/GHz
840 points/GHz
Test#2 (FP)
4201 points/GHz
2275 points/GHz
Test#3 (Generic, ZIP)
1290 points/GHz
1200 points/GHz
Test#1 (Memory)
1502 points/GHz
954 points/GHz
TOTAL
8020 points/GHz
5269 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. 3.11.4