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Celeron 3855U vs Core 2 Duo E8400


Description
The 3855U is based on Skylake architecture while the E8400 is based on Core.

Using the multithread performance as a reference, the 3855U gets a score of 24.6 k points while the E8400 gets 27.1 k points.

Summarizing, the E8400 is 1.1 times faster than the 3855U. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
406e3
1067a
Core
Skylake-U
Wolfdale
Architecture
Base frecuency
1.6 GHz
3 GHz
Socket
BGA1356
LGA 775
Cores/Threads
2/2
2/2
TDP
15 W
65 W
Cache L1 (d+i)
2x32+2x32 kB
2x32+2x32 kB
Cache L2
2x256 kB
6144 kB
Cache L3
2096 kB
0 kB
Date
December 2015
January 2008
Mean monothread perf.
19.24k points
17.28k points
Mean multithread perf.
24.56k points
27.11k 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
E8400
Test#1 (Integers)
1.64k
2.47k (x1.5)
Test#2 (FP)
6.72k
6.74k (x1)
Test#3 (Generic, ZIP)
2.06k
2.87k (x1.39)
Test#1 (Memory)
2.4k
4.47k (x1.86)
TOTAL
12.83k
16.55k (x1.29)

Multithread

3855U

E8400
Test#1 (Integers)
2.2k
4.64k (x2.11)
Test#2 (FP)
9.59k
12.36k (x1.29)
Test#3 (Generic, ZIP)
2.76k
4.86k (x1.76)
Test#1 (Memory)
2.27k
1.96k (x0.86)
TOTAL
16.81k
23.82k (x1.42)

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
E8400
Test#1 (Integers)
5.93k
3.3k (x0.56)
Test#2 (FP)
8.53k
7.28k (x0.85)
Test#3 (Generic, ZIP)
2.28k
2.88k (x1.26)
Test#1 (Memory)
2.5k
3.83k (x1.53)
TOTAL
19.24k
17.28k (x0.9)

Multithread

3855U

E8400
Test#1 (Integers)
7.87k
6.3k (x0.8)
Test#2 (FP)
11.28k
13.71k (x1.22)
Test#3 (Generic, ZIP)
2.91k
5.32k (x1.83)
Test#1 (Memory)
2.5k
1.78k (x0.71)
TOTAL
24.56k
27.11k (x1.1)

Performance/W
3855U
E8400
Test#1 (Integers)
524 points/W
97 points/W
Test#2 (FP)
752 points/W
211 points/W
Test#3 (Generic, ZIP)
194 points/W
82 points/W
Test#1 (Memory)
166 points/W
27 points/W
TOTAL
1637 points/W
417 points/W

Performance/GHz
3855U
E8400
Test#1 (Integers)
3706 points/GHz
1099 points/GHz
Test#2 (FP)
5333 points/GHz
2426 points/GHz
Test#3 (Generic, ZIP)
1423 points/GHz
959 points/GHz
Test#1 (Memory)
1562 points/GHz
1278 points/GHz
TOTAL
12024 points/GHz
5762 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