Pentium D 820 vs Celeron 3855U
Description
The 820 is based on NetBurst architecture while the 3855U is based on Skylake.
Using the multithread performance as a reference, the 820 gets a score of 14.1 k points while the 3855U gets 24.6 k points.
Summarizing, the 3855U is 1.7 times faster than the 820. To get a proper comparison between both models, take a look to the data shown below.
Using the multithread performance as a reference, the 820 gets a score of 14.1 k points while the 3855U gets 24.6 k points.
Summarizing, the 3855U is 1.7 times faster than the 820. To get a proper comparison between both models, take a look to the data shown below.
Specs
CPUID
f44
406e3
Core
Smithfield
Skylake-U
Base frecuency
2.8 GHz
1.6 GHz
Socket
LGA 775
BGA1356
Cores/Threads
2/2
2/2
TDP
130 W
15 W
Cache L1 (d+i)
16+8 kB
2x32+2x32 kB
Cache L2
2048 kB
2x256 kB
Cache L3
0 kB
2096 kB
Date
May 2005
December 2015
Mean monothread perf.
7.45k points
19.24k points
Mean multithread perf.
14.07k points
24.56k 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
820
3855U
Test#1 (Integers)
1.46k
1.64k (x1.13)
Test#2 (FP)
2.6k
6.72k (x2.59)
Test#3 (Generic, ZIP)
1.26k
2.06k (x1.63)
Test#1 (Memory)
0.91k
2.4k (x2.64)
TOTAL
6.23k
12.83k (x2.06)
Multithread
820
3855U
Test#1 (Integers)
2.93k
2.2k (x0.75)
Test#2 (FP)
5.19k
9.59k (x1.85)
Test#3 (Generic, ZIP)
2.53k
2.76k (x1.09)
Test#1 (Memory)
0.94k
2.27k (x2.41)
TOTAL
11.59k
16.81k (x1.45)
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
820
3855U
Test#1 (Integers)
1.93k
5.93k (x3.07)
Test#2 (FP)
3.11k
8.53k (x2.74)
Test#3 (Generic, ZIP)
1.49k
2.28k (x1.52)
Test#1 (Memory)
0.91k
2.5k (x2.76)
TOTAL
7.45k
19.24k (x2.58)
Multithread
820
3855U
Test#1 (Integers)
3.92k
7.87k (x2.01)
Test#2 (FP)
6.23k
11.28k (x1.81)
Test#3 (Generic, ZIP)
2.99k
2.91k (x0.97)
Test#1 (Memory)
0.94k
2.5k (x2.66)
TOTAL
14.07k
24.56k (x1.74)
Performance/W
820
3855U
Test#1 (Integers)
30 points/W
524 points/W
Test#2 (FP)
48 points/W
752 points/W
Test#3 (Generic, ZIP)
23 points/W
194 points/W
Test#1 (Memory)
7 points/W
166 points/W
TOTAL
108 points/W
1637 points/W
Performance/GHz
820
3855U
Test#1 (Integers)
690 points/GHz
3706 points/GHz
Test#2 (FP)
1112 points/GHz
5333 points/GHz
Test#3 (Generic, ZIP)
534 points/GHz
1423 points/GHz
Test#1 (Memory)
324 points/GHz
1562 points/GHz
TOTAL
2660 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.
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