Core i7-8550U vs Core 2 Quad Q8400
Description
The i7-8550U is based on Kaby Lake architecture while the Q8400 is based on Core.
Using the multithread performance as a reference, the i7-8550U gets a score of 127.9 k points while the Q8400 gets 51.9 k points.
Summarizing, the i7-8550U is 2.5 times faster than the Q8400 . To get a proper comparison between both models, take a look to the data shown below.
Using the multithread performance as a reference, the i7-8550U gets a score of 127.9 k points while the Q8400 gets 51.9 k points.
Summarizing, the i7-8550U is 2.5 times faster than the Q8400 . To get a proper comparison between both models, take a look to the data shown below.
Specs
CPUID
806ea
1067a
Core
Kaby Lake-R
Yorkfield
Base frecuency
1.8 GHz
2.666 GHz
Boost frecuency
4 GHz
2.666 GHz
Socket
BGA1356
LGA 775
Cores/Threads
4/8
4/4
TDP
15 W
95 W
Cache L1 (d+i)
4x32+4x32 kB
128+128 kB
Cache L2
4x256 kB
4096 kB
Cache L3
8192 kB
0 kB
Date
August 2017
April 2009
Mean monothread perf.
64.2k points
14.04k points
Mean multithread perf.
166.12k 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
i7-8550U
Q8400
Test#1 (Integers)
3.91k
2.44k (x0.62)
Test#2 (FP)
15.98k
6.24k (x0.39)
Test#3 (Generic, ZIP)
5.11k
2.62k (x0.51)
Test#1 (Memory)
11.05k
1.43k (x0.13)
TOTAL
36.05k
12.73k (x0.35)
Multithread
i7-8550U
Q8400
Test#1 (Integers)
11.76k
9.71k (x0.83)
Test#2 (FP)
50.15k
24.81k (x0.49)
Test#3 (Generic, ZIP)
16.76k
10.51k (x0.63)
Test#1 (Memory)
4.17k
2.03k (x0.49)
TOTAL
82.84k
47.05k (x0.57)
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
i7-8550U
Q8400
Test#1 (Integers)
12.93k
3.08k (x0.24)
Test#2 (FP)
20.59k
6.8k (x0.33)
Test#3 (Generic, ZIP)
5.41k
2.73k (x0.51)
Test#1 (Memory)
10.48k
1.42k (x0.14)
TOTAL
49.41k
14.04k (x0.28)
Multithread
i7-8550U
Q8400
Test#1 (Integers)
41.11k
12.25k (x0.3)
Test#2 (FP)
65.04k
26.84k (x0.41)
Test#3 (Generic, ZIP)
17.53k
10.82k (x0.62)
Test#1 (Memory)
4.22k
2.02k (x0.48)
TOTAL
127.9k
51.92k (x0.41)
Performance/W
i7-8550U
Q8400
Test#1 (Integers)
2741 points/W
129 points/W
Test#2 (FP)
4336 points/W
283 points/W
Test#3 (Generic, ZIP)
1169 points/W
114 points/W
Test#1 (Memory)
281 points/W
21 points/W
TOTAL
8527 points/W
547 points/W
Performance/GHz
i7-8550U
Q8400
Test#1 (Integers)
3232 points/GHz
1157 points/GHz
Test#2 (FP)
5147 points/GHz
2551 points/GHz
Test#3 (Generic, ZIP)
1353 points/GHz
1025 points/GHz
Test#1 (Memory)
2620 points/GHz
532 points/GHz
TOTAL
12351 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.
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