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Core i5-1235U vs i7-8700k


Description
The i5-1235U is based on Alder Lake architecture while the i7-8700k is based on Coffee Lake.

Using the multithread performance as a reference, the i5-1235U gets a score of 297.5 k points while the i7-8700k gets 443.8 k points.

Summarizing, the i7-8700k is 1.5 times faster than the i5-1235U. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
906a4
906ea
Core
Alder Lake-U
Coffee Lake-S
Architecture
Base frecuency
3.3 GHz
3.7 GHz
Boost frecuency
4.4 GHz
4.7 GHz
Socket
BGA 1700
LGA 1151
Cores/Threads
10/12
6/12
TDP
15 W
95 W
Cache L1 (d+i)
2x32/8x64+2x48/8x32 kB
6x32+6x32 kB
Cache L2
1x1280+4x2048 kB
6x256 kB
Cache L3
12288 kB
12288 kB
Date
April 2022
October 2017
Mean monothread perf.
81.64k points
80.6k points
Mean multithread perf.
297.46k points
443.77k 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
i5-1235U
i7-8700k
Test#1 (Integers)
7.33k
4.13k (x0.56)
Test#2 (FP)
18.27k
16.96k (x0.93)
Test#3 (Generic, ZIP)
12.8k
5.56k (x0.43)
Test#1 (Memory)
13.2k
12.85k (x0.97)
TOTAL
51.61k
39.5k (x0.77)

Multithread

i5-1235U

i7-8700k
Test#1 (Integers)
29.24k
24.01k (x0.82)
Test#2 (FP)
83.32k
108.69k (x1.3)
Test#3 (Generic, ZIP)
54.53k
36.62k (x0.67)
Test#1 (Memory)
4.99k
9.33k (x1.87)
TOTAL
172.07k
178.64k (x1.04)

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
i5-1235U
i7-8700k
Test#1 (Integers)
23.53k
12.92k (x0.55)
Test#2 (FP)
23.51k
20.68k (x0.88)
Test#3 (Generic, ZIP)
14.71k
5.3k (x0.36)
Test#1 (Memory)
13.24k
12.59k (x0.95)
TOTAL
74.99k
51.48k (x0.69)

Multithread

i5-1235U

i7-8700k
Test#1 (Integers)
106.07k
94.26k (x0.89)
Test#2 (FP)
115.88k
152.55k (x1.32)
Test#3 (Generic, ZIP)
60.53k
39.74k (x0.66)
Test#1 (Memory)
5.88k
8.53k (x1.45)
TOTAL
288.36k
295.07k (x1.02)

AVX optimized benchmark
The benchmark in mode II (AVX) is optimized to used 256 bits registers beside the first version of the Advanced Vector Extensions (AVX). The first AVX compatible CPU was released in 2011.
Monothread
i5-1235U
i7-8700k
Test#1 (Integers)
23.03k
16.87k (x0.73)
Test#2 (FP)
24.11k
26.12k (x1.08)
Test#3 (Generic, ZIP)
13.9k
6.33k (x0.46)
Test#1 (Memory)
12.11k
13.71k (x1.13)
TOTAL
73.15k
63.03k (x0.86)

Multithread

i5-1235U

i7-8700k
Test#1 (Integers)
111.78k
105.74k (x0.95)
Test#2 (FP)
124.18k
180.52k (x1.45)
Test#3 (Generic, ZIP)
59.87k
44.99k (x0.75)
Test#1 (Memory)
5.76k
8.51k (x1.48)
TOTAL
301.58k
339.77k (x1.13)

AVX2 optimized benchmark
The benchmark in mode III (AVX2), like AVX1, is optimized to used 256 bits registers beside the second version of the Advanced Vector Extensions (AVX). The first AVX2 compatible CPU was released in 2013.
Monothread
i5-1235U
i7-8700k
Test#1 (Integers)
36.73k
31.2k (x0.85)
Test#2 (FP)
22.09k
27.82k (x1.26)
Test#3 (Generic, ZIP)
11.24k
6.57k (x0.58)
Test#1 (Memory)
11.58k
15k (x1.3)
TOTAL
81.64k
80.6k (x0.99)

Multithread

i5-1235U

i7-8700k
Test#1 (Integers)
130.18k
202.42k (x1.55)
Test#2 (FP)
110.21k
186.33k (x1.69)
Test#3 (Generic, ZIP)
50.76k
44.96k (x0.89)
Test#1 (Memory)
6.31k
10.05k (x1.59)
TOTAL
297.46k
443.77k (x1.49)

Performance/W
i5-1235U
i7-8700k
Test#1 (Integers)
8679 points/W
2131 points/W
Test#2 (FP)
7348 points/W
1961 points/W
Test#3 (Generic, ZIP)
3384 points/W
473 points/W
Test#1 (Memory)
421 points/W
106 points/W
TOTAL
19831 points/W
4671 points/W

Performance/GHz
i5-1235U
i7-8700k
Test#1 (Integers)
8349 points/GHz
6639 points/GHz
Test#2 (FP)
5020 points/GHz
5919 points/GHz
Test#3 (Generic, ZIP)
2555 points/GHz
1397 points/GHz
Test#1 (Memory)
2631 points/GHz
3192 points/GHz
TOTAL
18555 points/GHz
17148 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