| | | | | | |

Core 2 Quad Q8400 vs Core i7-7500U


Description
The Q8400 is based on Core architecture while the i7-7500U is based on Kaby Lake.

Using the multithread performance as a reference, the Q8400 gets a score of 51.9 k points while the i7-7500U gets 87 k points.

Summarizing, the i7-7500U is 1.7 times faster than the Q8400 . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
1067a
806e9
Core
Yorkfield
Kaby Lake-U
Architecture
Base frecuency
2.666 GHz
2.7 GHz
Boost frecuency
2.666 GHz
3.5 GHz
Socket
LGA 775
BGA1356
Cores/Threads
4/4
2/4
TDP
95 W
15 W
Cache L1 (d+i)
128+128 kB
2x32+2x32 kB
Cache L2
4096 kB
2x256 kB
Cache L3
0 kB
4096 kB
Date
April 2009
August 2016
Mean monothread perf.
14.04k points
48.67k points
Mean multithread perf.
51.92k points
86.94k 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
Q8400
i7-7500U
Test#1 (Integers)
2.44k
3.53k (x1.44)
Test#2 (FP)
6.24k
14.67k (x2.35)
Test#3 (Generic, ZIP)
2.62k
4.84k (x1.85)
Test#1 (Memory)
1.43k
6.26k (x4.38)
TOTAL
12.73k
29.29k (x2.3)

Multithread

Q8400

i7-7500U
Test#1 (Integers)
9.71k
7.26k (x0.75)
Test#2 (FP)
24.81k
35.04k (x1.41)
Test#3 (Generic, ZIP)
10.51k
11.28k (x1.07)
Test#1 (Memory)
2.03k
5.69k (x2.81)
TOTAL
47.05k
59.27k (x1.26)

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
Q8400
i7-7500U
Test#1 (Integers)
3.08k
12.93k (x4.19)
Test#2 (FP)
6.8k
18.63k (x2.74)
Test#3 (Generic, ZIP)
2.73k
5.03k (x1.84)
Test#1 (Memory)
1.42k
6.16k (x4.35)
TOTAL
14.04k
42.75k (x3.05)

Multithread

Q8400

i7-7500U
Test#1 (Integers)
12.25k
27.13k (x2.22)
Test#2 (FP)
26.84k
43.19k (x1.61)
Test#3 (Generic, ZIP)
10.82k
11.7k (x1.08)
Test#1 (Memory)
2.02k
4.99k (x2.47)
TOTAL
51.92k
87.02k (x1.68)

Performance/W
Q8400
i7-7500U
Test#1 (Integers)
129 points/W
1809 points/W
Test#2 (FP)
283 points/W
2880 points/W
Test#3 (Generic, ZIP)
114 points/W
780 points/W
Test#1 (Memory)
21 points/W
333 points/W
TOTAL
547 points/W
5801 points/W

Performance/GHz
Q8400
i7-7500U
Test#1 (Integers)
1157 points/GHz
3695 points/GHz
Test#2 (FP)
2551 points/GHz
5322 points/GHz
Test#3 (Generic, ZIP)
1025 points/GHz
1437 points/GHz
Test#1 (Memory)
532 points/GHz
1761 points/GHz
TOTAL
5265 points/GHz
12215 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