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Core i7-720QM vs Celeron N2840


Description
The i7-720QM is based on Nehalem architecture while the N2840 is based on Silvermont.

Using the multithread performance as a reference, the i7-720QM gets a score of 38.8 k points while the N2840 gets 16.8 k points.

Summarizing, the i7-720QM is 2.3 times faster than the N2840. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
106e5
30678
Core
Clarksfield
Bay Trail-M
Architecture
Base frecuency
1.6 GHz
2.167 GHz
Boost frecuency
2.8 GHz
2.58 GHz
Socket
988-pin micro-FCPGA8
BGA1170
Cores/Threads
4/8
2/2
TDP
45 W
7,5 W
Cache L1 (d+i)
4x32+4x32 kB
2x32+2x24 kB
Cache L2
4x256 kB
1024 kB
Cache L3
6144 kB
0 kB
Date
September 2009
July 2014
Mean monothread perf.
13.13k points
10.36k points
Mean multithread perf.
38.78k points
16.79k points

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
N2840
Test#1 (Integers)
5.49k
4.8k (x0.87)
Test#2 (FP)
3.55k
2.47k (x0.7)
Test#3 (Generic, ZIP)
2.01k
1.86k (x0.93)
Test#1 (Memory)
2.09k
1.22k (x0.58)
TOTAL
13.13k
10.36k (x0.79)

Multithread

i7-720QM

N2840
Test#1 (Integers)
15.06k
8.24k (x0.55)
Test#2 (FP)
12.15k
4.19k (x0.34)
Test#3 (Generic, ZIP)
7.18k
3.05k (x0.42)
Test#1 (Memory)
4.39k
1.32k (x0.3)
TOTAL
38.78k
16.79k (x0.43)

Performance/W
i7-720QM
N2840
Test#1 (Integers)
335 points/W
1177 points/W
Test#2 (FP)
270 points/W
598 points/W
Test#3 (Generic, ZIP)
160 points/W
436 points/W
Test#1 (Memory)
98 points/W
188 points/W
TOTAL
862 points/W
2399 points/W

Performance/GHz
i7-720QM
N2840
Test#1 (Integers)
1962 points/GHz
1861 points/GHz
Test#2 (FP)
1267 points/GHz
958 points/GHz
Test#3 (Generic, ZIP)
717 points/GHz
723 points/GHz
Test#1 (Memory)
745 points/GHz
472 points/GHz
TOTAL
4691 points/GHz
4015 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