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Core i5-8250U vs i7-920


Description
The i5-8250U is based on Kaby Lake architecture while the i7-920 is based on Nehalem Westmere.

Using the multithread performance as a reference, the i5-8250U gets a score of 122.3 k points while the i7-920 gets 47.2 k points.

Summarizing, the i5-8250U is 2.6 times faster than the i7-920 . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
806ea
106a5
Core
Kaby Lake-R
Bloomfield
Architecture
Kaby Lake
Base frecuency
1.6 GHz
2.667 GHz
Boost frecuency
3.4 GHz
2.993 GHz
Socket
BGA1356
LGA 1366
Cores/Threads
4/8
4/8
TDP
15 W
130 W
Cache L1 (d+i)
4x32+4x32 kB
32+32 kB
Cache L2
4x256 kB
256 kB
Cache L3
6144 kB
8192 kB
Date
August 2017
November 2008
Mean monothread perf.
54.31k points
16.33k points
Mean multithread perf.
161.26k points
47.2k 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
i5-8250U
i7-920
Test#1 (Integers)
3.32k
1.97k (x0.59)
Test#2 (FP)
13.5k
4.43k (x0.33)
Test#3 (Generic, ZIP)
4.11k
2.75k (x0.67)
Test#1 (Memory)
7.42k
2.53k (x0.34)
TOTAL
28.34k
11.68k (x0.41)

Multithread

i5-8250U

i7-920
Test#1 (Integers)
13.97k
7.71k (x0.55)
Test#2 (FP)
50.8k
18.81k (x0.37)
Test#3 (Generic, ZIP)
14.71k
13.76k (x0.93)
Test#1 (Memory)
4.76k
5.07k (x1.06)
TOTAL
84.24k
45.34k (x0.54)

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
i5-8250U
i7-920
Test#1 (Integers)
12.41k
6.12k (x0.49)
Test#2 (FP)
18.11k
4.76k (x0.26)
Test#3 (Generic, ZIP)
4.79k
2.78k (x0.58)
Test#1 (Memory)
8.16k
2.67k (x0.33)
TOTAL
43.46k
16.33k (x0.38)

Multithread

i5-8250U

i7-920
Test#1 (Integers)
42.48k
19.26k (x0.45)
Test#2 (FP)
60.2k
14.96k (x0.25)
Test#3 (Generic, ZIP)
14.85k
8.05k (x0.54)
Test#1 (Memory)
4.77k
4.92k (x1.03)
TOTAL
122.3k
47.2k (x0.39)

Performance/W
i5-8250U
i7-920
Test#1 (Integers)
2832 points/W
148 points/W
Test#2 (FP)
4014 points/W
115 points/W
Test#3 (Generic, ZIP)
990 points/W
62 points/W
Test#1 (Memory)
318 points/W
38 points/W
TOTAL
8153 points/W
363 points/W

Performance/GHz
i5-8250U
i7-920
Test#1 (Integers)
3650 points/GHz
2044 points/GHz
Test#2 (FP)
5327 points/GHz
1591 points/GHz
Test#3 (Generic, ZIP)
1407 points/GHz
930 points/GHz
Test#1 (Memory)
2399 points/GHz
891 points/GHz
TOTAL
12784 points/GHz
5457 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