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Core i7-860 vs Celeron 3855U


Description
The i7-860 is based on Nehalem architecture while the 3855U is based on Skylake.

Using the multithread performance as a reference, the i7-860 gets a score of 75.4 k points while the 3855U gets 24.6 k points.

Summarizing, the i7-860 is 3.1 times faster than the 3855U. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
106e5
406e3
Core
Lynnfield
Skylake-U
Architecture
Base frecuency
2.8 GHz
1.6 GHz
Boost frecuency
3.467 GHz
1.6 GHz
Socket
LGA 1156
BGA1356
Cores/Threads
4/8
2/2
TDP
95 W
15 W
Cache L1 (d+i)
4x32+4x32 kB
2x32+2x32 kB
Cache L2
4x256 kB
2x256 kB
Cache L3
8192 kB
2096 kB
Date
September 2009
December 2015
Mean monothread perf.
19.19k points
19.24k points
Mean multithread perf.
75.43k 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
i7-860
3855U
Test#1 (Integers)
2.15k
1.64k (x0.76)
Test#2 (FP)
4.87k
6.72k (x1.38)
Test#3 (Generic, ZIP)
2.82k
2.06k (x0.73)
Test#1 (Memory)
3.13k
2.4k (x0.77)
TOTAL
12.97k
12.83k (x0.99)

Multithread

i7-860

3855U
Test#1 (Integers)
8.24k
2.2k (x0.27)
Test#2 (FP)
21.63k
9.59k (x0.44)
Test#3 (Generic, ZIP)
14.65k
2.76k (x0.19)
Test#1 (Memory)
5.02k
2.27k (x0.45)
TOTAL
49.54k
16.81k (x0.34)

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
i7-860
3855U
Test#1 (Integers)
7.87k
5.93k (x0.75)
Test#2 (FP)
5.25k
8.53k (x1.63)
Test#3 (Generic, ZIP)
2.94k
2.28k (x0.78)
Test#1 (Memory)
3.13k
2.5k (x0.8)
TOTAL
19.19k
19.24k (x1)

Multithread

i7-860

3855U
Test#1 (Integers)
31.5k
7.87k (x0.25)
Test#2 (FP)
23.47k
11.28k (x0.48)
Test#3 (Generic, ZIP)
15.47k
2.91k (x0.19)
Test#1 (Memory)
4.98k
2.5k (x0.5)
TOTAL
75.43k
24.56k (x0.33)

Performance/W
i7-860
3855U
Test#1 (Integers)
332 points/W
524 points/W
Test#2 (FP)
247 points/W
752 points/W
Test#3 (Generic, ZIP)
163 points/W
194 points/W
Test#1 (Memory)
52 points/W
166 points/W
TOTAL
794 points/W
1637 points/W

Performance/GHz
i7-860
3855U
Test#1 (Integers)
2271 points/GHz
3706 points/GHz
Test#2 (FP)
1514 points/GHz
5333 points/GHz
Test#3 (Generic, ZIP)
847 points/GHz
1423 points/GHz
Test#1 (Memory)
902 points/GHz
1562 points/GHz
TOTAL
5534 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. 3.11.4