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Core i5-7300U vs Core 2 Quad Q8400


Description
The i5-7300U is based on Kaby Lake architecture while the Q8400 is based on Core.

Using the multithread performance as a reference, the i5-7300U gets a score of 82.9 k points while the Q8400 gets 51.9 k points.

Summarizing, the i5-7300U is 1.6 times faster than the Q8400 . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
806e9
1067a
Core
Kaby Lake-U
Yorkfield
Architecture
Base frecuency
2.6 GHz
2.666 GHz
Boost frecuency
3.5 GHz
2.666 GHz
Socket
BGA1356
LGA 775
Cores/Threads
2/4
4/4
TDP
15 W
95 W
Cache L1 (d+i)
2x32+2x32 kB
128+128 kB
Cache L2
2x256 kB
4096 kB
Cache L3
3072 kB
0 kB
Date
January 2017
April 2009
Mean monothread perf.
48.25k points
14.04k points
Mean multithread perf.
109.1k points
51.92k 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
i5-7300U
Q8400
Test#1 (Integers)
3.11k
2.44k (x0.79)
Test#2 (FP)
12.24k
6.24k (x0.51)
Test#3 (Generic, ZIP)
4.1k
2.62k (x0.64)
Test#1 (Memory)
4.96k
1.43k (x0.29)
TOTAL
24.41k
12.73k (x0.52)

Multithread

i5-7300U

Q8400
Test#1 (Integers)
6.98k
9.71k (x1.39)
Test#2 (FP)
32.05k
24.81k (x0.77)
Test#3 (Generic, ZIP)
10.82k
10.51k (x0.97)
Test#1 (Memory)
5.52k
2.03k (x0.37)
TOTAL
55.36k
47.05k (x0.85)

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
i5-7300U
Q8400
Test#1 (Integers)
9.96k
3.08k (x0.31)
Test#2 (FP)
15.11k
6.8k (x0.45)
Test#3 (Generic, ZIP)
3.87k
2.73k (x0.71)
Test#1 (Memory)
4.54k
1.42k (x0.31)
TOTAL
33.47k
14.04k (x0.42)

Multithread

i5-7300U

Q8400
Test#1 (Integers)
25.26k
12.25k (x0.48)
Test#2 (FP)
40.6k
26.84k (x0.66)
Test#3 (Generic, ZIP)
11.24k
10.82k (x0.96)
Test#1 (Memory)
5.83k
2.02k (x0.35)
TOTAL
82.94k
51.92k (x0.63)

Performance/W
i5-7300U
Q8400
Test#1 (Integers)
1684 points/W
129 points/W
Test#2 (FP)
2707 points/W
283 points/W
Test#3 (Generic, ZIP)
750 points/W
114 points/W
Test#1 (Memory)
389 points/W
21 points/W
TOTAL
5530 points/W
547 points/W

Performance/GHz
i5-7300U
Q8400
Test#1 (Integers)
2845 points/GHz
1157 points/GHz
Test#2 (FP)
4316 points/GHz
2551 points/GHz
Test#3 (Generic, ZIP)
1105 points/GHz
1025 points/GHz
Test#1 (Memory)
1296 points/GHz
532 points/GHz
TOTAL
9563 points/GHz
5265 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