Celeron 3855U vs Core 2 Duo P8400
Description
The 3855U is based on Skylake architecture while the P8400 is based on Core.
Using the multithread performance as a reference, the 3855U gets a score of 24.6 k points while the P8400 gets 21 k points.
Summarizing, the 3855U is 1.2 times faster than the P8400. 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 P8400 gets 21 k points.
Summarizing, the 3855U is 1.2 times faster than the P8400. To get a proper comparison between both models, take a look to the data shown below.
Specs
CPUID
406e3
10676
Core
Skylake-U
Peryn-3M
Base frecuency
1.6 GHz
2.267 GHz
Socket
BGA1356
Socket P
Cores/Threads
2/2
2/2
TDP
15 W
25 W
Cache L1 (d+i)
2x32+2x32 kB
2x32 kB
Cache L2
2x256 kB
3072 kB
Cache L3
2096 kB
0 kB
Date
December 2015
July 2008
Mean monothread perf.
19.24k points
11.38k points
Mean multithread perf.
24.56k points
21.02k 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
P8400
Test#1 (Integers)
1.64k
1.78k (x1.08)
Test#2 (FP)
6.72k
4.95k (x0.74)
Test#3 (Generic, ZIP)
2.06k
2.08k (x1.01)
Test#1 (Memory)
2.4k
1.44k (x0.6)
TOTAL
12.83k
10.24k (x0.8)
Multithread
3855U
P8400
Test#1 (Integers)
2.2k
3.53k (x1.61)
Test#2 (FP)
9.59k
9.75k (x1.02)
Test#3 (Generic, ZIP)
2.76k
4.07k (x1.48)
Test#1 (Memory)
2.27k
1.44k (x0.63)
TOTAL
16.81k
18.79k (x1.12)
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
P8400
Test#1 (Integers)
5.93k
2.43k (x0.41)
Test#2 (FP)
8.53k
5.4k (x0.63)
Test#3 (Generic, ZIP)
2.28k
2.13k (x0.93)
Test#1 (Memory)
2.5k
1.43k (x0.57)
TOTAL
19.24k
11.38k (x0.59)
Multithread
3855U
P8400
Test#1 (Integers)
7.87k
4.81k (x0.61)
Test#2 (FP)
11.28k
10.58k (x0.94)
Test#3 (Generic, ZIP)
2.91k
4.18k (x1.44)
Test#1 (Memory)
2.5k
1.45k (x0.58)
TOTAL
24.56k
21.02k (x0.86)
Performance/W
3855U
P8400
Test#1 (Integers)
524 points/W
193 points/W
Test#2 (FP)
752 points/W
423 points/W
Test#3 (Generic, ZIP)
194 points/W
167 points/W
Test#1 (Memory)
166 points/W
58 points/W
TOTAL
1637 points/W
841 points/W
Performance/GHz
3855U
P8400
Test#1 (Integers)
3706 points/GHz
1071 points/GHz
Test#2 (FP)
5333 points/GHz
2383 points/GHz
Test#3 (Generic, ZIP)
1423 points/GHz
938 points/GHz
Test#1 (Memory)
1562 points/GHz
629 points/GHz
TOTAL
12024 points/GHz
5022 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