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Core i7-11700 vs i7-8700k


Description
The i7-11700 is based on Rocket Lake architecture while the i7-8700k is based on Coffee Lake.

Using the multithread performance as a reference, the i7-11700 gets a score of 729 k points while the i7-8700k gets 443.8 k points.

Summarizing, the i7-11700 is 1.6 times faster than the i7-8700k. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
a0671
906ea
Core
Rocket Lake-S
Coffee Lake-S
Architecture
Base frecuency
2.5 GHz
3.7 GHz
Boost frecuency
4.9 GHz
4.7 GHz
Socket
LGA 1200
LGA 1151
Cores/Threads
8/16
6/12
TDP
65 W
95 W
Cache L1 (d+i)
8x32+8x48 kB
6x32+6x32 kB
Cache L2
8x512 kB
6x256 kB
Cache L3
16384 kB
12288 kB
Date
March 2021
October 2017
Mean monothread perf.
98.87k points
80.6k points
Mean multithread perf.
728.98k 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
i7-11700
i7-8700k
Test#1 (Integers)
5.48k
4.13k (x0.75)
Test#2 (FP)
20.99k
16.96k (x0.81)
Test#3 (Generic, ZIP)
12.58k
5.56k (x0.44)
Test#1 (Memory)
21.24k
12.85k (x0.6)
TOTAL
60.28k
39.5k (x0.66)

Multithread

i7-11700

i7-8700k
Test#1 (Integers)
44.15k
24.01k (x0.54)
Test#2 (FP)
196.6k
108.69k (x0.55)
Test#3 (Generic, ZIP)
102.57k
36.62k (x0.36)
Test#1 (Memory)
10.64k
9.33k (x0.88)
TOTAL
353.96k
178.64k (x0.5)

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
i7-11700
i7-8700k
Test#1 (Integers)
18.05k
12.92k (x0.72)
Test#2 (FP)
26.13k
20.68k (x0.79)
Test#3 (Generic, ZIP)
13.92k
5.3k (x0.38)
Test#1 (Memory)
21.22k
12.59k (x0.59)
TOTAL
79.32k
51.48k (x0.65)

Multithread

i7-11700

i7-8700k
Test#1 (Integers)
160.49k
94.26k (x0.59)
Test#2 (FP)
225.25k
152.55k (x0.68)
Test#3 (Generic, ZIP)
113.88k
39.74k (x0.35)
Test#1 (Memory)
10.64k
8.53k (x0.8)
TOTAL
510.25k
295.07k (x0.58)

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
i7-11700
i7-8700k
Test#1 (Integers)
18.96k
16.87k (x0.89)
Test#2 (FP)
28.34k
26.12k (x0.92)
Test#3 (Generic, ZIP)
13.26k
6.33k (x0.48)
Test#1 (Memory)
20.2k
13.71k (x0.68)
TOTAL
80.76k
63.03k (x0.78)

Multithread

i7-11700

i7-8700k
Test#1 (Integers)
164.31k
105.74k (x0.64)
Test#2 (FP)
253.96k
180.52k (x0.71)
Test#3 (Generic, ZIP)
115.28k
44.99k (x0.39)
Test#1 (Memory)
10.65k
8.51k (x0.8)
TOTAL
544.2k
339.77k (x0.62)

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
i7-11700
i7-8700k
Test#1 (Integers)
35.12k
31.2k (x0.89)
Test#2 (FP)
29.24k
27.82k (x0.95)
Test#3 (Generic, ZIP)
12.56k
6.57k (x0.52)
Test#1 (Memory)
21.95k
15k (x0.68)
TOTAL
98.87k
80.6k (x0.82)

Multithread

i7-11700

i7-8700k
Test#1 (Integers)
304k
202.42k (x0.67)
Test#2 (FP)
304.7k
186.33k (x0.61)
Test#3 (Generic, ZIP)
109.64k
44.96k (x0.41)
Test#1 (Memory)
10.64k
10.05k (x0.95)
TOTAL
728.98k
443.77k (x0.61)

Performance/W
i7-11700
i7-8700k
Test#1 (Integers)
4677 points/W
2131 points/W
Test#2 (FP)
4688 points/W
1961 points/W
Test#3 (Generic, ZIP)
1687 points/W
473 points/W
Test#1 (Memory)
164 points/W
106 points/W
TOTAL
11215 points/W
4671 points/W

Performance/GHz
i7-11700
i7-8700k
Test#1 (Integers)
7168 points/GHz
6639 points/GHz
Test#2 (FP)
5967 points/GHz
5919 points/GHz
Test#3 (Generic, ZIP)
2563 points/GHz
1397 points/GHz
Test#1 (Memory)
4479 points/GHz
3192 points/GHz
TOTAL
20177 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