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Core 2 Duo E8400 vs Core i7-7020U


Description
The E8400 is based on Core architecture while the i7-7020U is based on Kaby Lake.

Using the multithread performance as a reference, the E8400 gets a score of 27.1 k points while the i7-7020U gets 57.3 k points.

Summarizing, the i7-7020U is 2.1 times faster than the E8400 . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
1067a
806ea
Core
Wolfdale
Kaby Lake-U
Architecture
Base frecuency
3 GHz
2.3 GHz
Socket
LGA 775
BGA 1356
Cores/Threads
2/2
2/4
TDP
65 W
15 W
Cache L1 (d+i)
2x32+2x32 kB
2x32+2x32 kB
Cache L2
6144 kB
2x256 kB
Cache L3
0 kB
3072 kB
Date
January 2008
April 2018
Mean monothread perf.
17.28k points
33.63k points
Mean multithread perf.
27.11k points
73.15k 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
E8400
i7-7020U
Test#1 (Integers)
2.47k
2.3k (x0.93)
Test#2 (FP)
6.74k
8.36k (x1.24)
Test#3 (Generic, ZIP)
2.87k
2.75k (x0.96)
Test#1 (Memory)
4.47k
4.64k (x1.04)
TOTAL
16.55k
18.04k (x1.09)

Multithread

E8400

i7-7020U
Test#1 (Integers)
4.64k
4.74k (x1.02)
Test#2 (FP)
12.36k
17.96k (x1.45)
Test#3 (Generic, ZIP)
4.86k
6.95k (x1.43)
Test#1 (Memory)
1.96k
4.95k (x2.52)
TOTAL
23.82k
34.61k (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
E8400
i7-7020U
Test#1 (Integers)
3.3k
8.18k (x2.48)
Test#2 (FP)
7.28k
11.67k (x1.6)
Test#3 (Generic, ZIP)
2.88k
2.97k (x1.03)
Test#1 (Memory)
3.83k
4.68k (x1.22)
TOTAL
17.28k
27.5k (x1.59)

Multithread

E8400

i7-7020U
Test#1 (Integers)
6.3k
17.51k (x2.78)
Test#2 (FP)
13.71k
27.61k (x2.01)
Test#3 (Generic, ZIP)
5.32k
7.39k (x1.39)
Test#1 (Memory)
1.78k
4.78k (x2.69)
TOTAL
27.11k
57.3k (x2.11)

Performance/W
E8400
i7-7020U
Test#1 (Integers)
97 points/W
1168 points/W
Test#2 (FP)
211 points/W
1841 points/W
Test#3 (Generic, ZIP)
82 points/W
493 points/W
Test#1 (Memory)
27 points/W
319 points/W
TOTAL
417 points/W
3820 points/W

Performance/GHz
E8400
i7-7020U
Test#1 (Integers)
1099 points/GHz
3555 points/GHz
Test#2 (FP)
2426 points/GHz
5073 points/GHz
Test#3 (Generic, ZIP)
959 points/GHz
1293 points/GHz
Test#1 (Memory)
1278 points/GHz
2034 points/GHz
TOTAL
5762 points/GHz
11956 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