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Pentium D 925 vs Celeron 3855U


Description
The 925 is based on NetBurst architecture while the 3855U is based on Skylake.

Using the multithread performance as a reference, the 925 gets a score of 14 k points while the 3855U gets 24.6 k points.

Summarizing, the 3855U is 1.8 times faster than the 925. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
f65
406e3
Core
Presler
Skylake-U
Architecture
Base frecuency
3 GHz
1.6 GHz
Socket
LGA 775
BGA1356
Cores/Threads
2/2
2/2
TDP
95 W
15 W
Cache L1 (d+i)
16+8 kB
2x32+2x32 kB
Cache L2
4096 kB
2x256 kB
Cache L3
0 kB
2096 kB
Date
October 2006
December 2015

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
925
3855U
Test#1 (Integers)
1521
1643 (8.03%)
Test#2 (FP)
2948
6721 (127.97%)
Test#3 (Generic, ZIP)
1506
2063 (37.04%)
Test#1 (Memory)
816
2404 (194.49%)
TOTAL
6791
12831 (88.94%)

Multithread

925

3855U
Test#1 (Integers)
2982
2196 (-26.36%)
Test#2 (FP)
5616
9586 (70.68%)
Test#3 (Generic, ZIP)
2870
2758 (-3.90%)
Test#1 (Memory)
819
2270 (177.24%)
TOTAL
12287
16809 (36.81%)

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
925
3855U
Test#1 (Integers)
2059
5930 (187.99%)
Test#2 (FP)
3316
8533 (157.31%)
Test#3 (Generic, ZIP)
1522
2277 (49.60%)
Test#1 (Memory)
799
2499 (212.75%)
TOTAL
7696
19239 (149.97%)

Multithread

925

3855U
Test#1 (Integers)
3995
7867 (96.90%)
Test#2 (FP)
6318
11283 (78.57%)
Test#3 (Generic, ZIP)
2905
2910 (0.15%)
Test#1 (Memory)
808
2496 (208.84%)
TOTAL
14027
24556 (75.06%)

Performance/W
925
3855U
Test#1 (Integers)
42 points/W
524 points/W
Test#2 (FP)
67 points/W
752 points/W
Test#3 (Generic, ZIP)
31 points/W
194 points/W
Test#1 (Memory)
9 points/W
166 points/W
TOTAL
148 points/W
1637 points/W

Performance/GHz
925
3855U
Test#1 (Integers)
686 points/GHz
3706 points/GHz
Test#2 (FP)
1105 points/GHz
5333 points/GHz
Test#3 (Generic, ZIP)
507 points/GHz
1423 points/GHz
Test#1 (Memory)
266 points/GHz
1562 points/GHz
TOTAL
2565 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.


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. 3.7.8