Core i7-720QM vs Celeron 3855U
Description
The i7-720QM is based on Nehalem architecture while the 3855U is based on Skylake.
Using the multithread performance as a reference, the i7-720QM gets a score of 38.8 k points while the 3855U gets 24.6 k points.
Summarizing, the i7-720QM is 1.6 times faster than the 3855U. To get a proper comparison between both models, take a look to the data shown below.
Using the multithread performance as a reference, the i7-720QM gets a score of 38.8 k points while the 3855U gets 24.6 k points.
Summarizing, the i7-720QM is 1.6 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
Clarksfield
Skylake-U
Base frecuency
1.6 GHz
1.6 GHz
Boost frecuency
2.8 GHz
1.6 GHz
Socket
988-pin micro-FCPGA8
BGA1356
Cores/Threads
4/8
2/2
TDP
45 W
15 W
Cache L1 (d+i)
4x32+4x32 kB
2x32+2x32 kB
Cache L2
4x256 kB
2x256 kB
Cache L3
6144 kB
2096 kB
Date
September 2009
December 2015
Mean monothread perf.
13.13k points
19.24k points
Mean multithread perf.
38.78k 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
i7-720QM
3855U
Test#1 (Integers)
1.49k
1.64k (x1.1)
Test#2 (FP)
3.4k
6.72k (x1.97)
Test#3 (Generic, ZIP)
1.95k
2.06k (x1.06)
Test#1 (Memory)
2.08k
2.4k (x1.16)
TOTAL
8.92k
12.83k (x1.44)
Multithread
i7-720QM
3855U
Test#1 (Integers)
4.23k
2.2k (x0.52)
Test#2 (FP)
11.4k
9.59k (x0.84)
Test#3 (Generic, ZIP)
7.17k
2.76k (x0.38)
Test#1 (Memory)
4.51k
2.27k (x0.5)
TOTAL
27.32k
16.81k (x0.62)
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
i7-720QM
3855U
Test#1 (Integers)
5.49k
5.93k (x1.08)
Test#2 (FP)
3.55k
8.53k (x2.41)
Test#3 (Generic, ZIP)
2.01k
2.28k (x1.13)
Test#1 (Memory)
2.09k
2.5k (x1.2)
TOTAL
13.13k
19.24k (x1.46)
Multithread
i7-720QM
3855U
Test#1 (Integers)
15.06k
7.87k (x0.52)
Test#2 (FP)
12.15k
11.28k (x0.93)
Test#3 (Generic, ZIP)
7.18k
2.91k (x0.41)
Test#1 (Memory)
4.39k
2.5k (x0.57)
TOTAL
38.78k
24.56k (x0.63)
Performance/W
i7-720QM
3855U
Test#1 (Integers)
335 points/W
524 points/W
Test#2 (FP)
270 points/W
752 points/W
Test#3 (Generic, ZIP)
160 points/W
194 points/W
Test#1 (Memory)
98 points/W
166 points/W
TOTAL
862 points/W
1637 points/W
Performance/GHz
i7-720QM
3855U
Test#1 (Integers)
1962 points/GHz
3706 points/GHz
Test#2 (FP)
1267 points/GHz
5333 points/GHz
Test#3 (Generic, ZIP)
717 points/GHz
1423 points/GHz
Test#1 (Memory)
745 points/GHz
1562 points/GHz
TOTAL
4691 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