Core i7-8700 vs i7-8700k
Description
Both models i7-8700 and i7-8700k are based on Coffee Lake architecture.
Coffee Lake is the second refinement of Intel’s 14nm (Tri-Gate) technology. While it uses LGA1151 socket, it is incompatible with previous generations due to electrical changes in socket’s pins so these CPUs require Z370 chipset. This kind of generation introduced more cores in every range to compete with new AMD’s architecture. Coffee Lake uses DDR4 memory at 2400MHz for i3 and at 2666MHz for i5, i7 CPUs plus iGPU frequency has been increased 50MHz with respect to previous generation.
Using the multithread performance as a reference, the i7-8700 gets a score of 389 k points while the i7-8700k gets 443.8 k points.
Summarizing, the i7-8700k is 1.1 times faster than the i7-8700. To get a proper comparison between both models, take a look to the data shown below.
Coffee Lake is the second refinement of Intel’s 14nm (Tri-Gate) technology. While it uses LGA1151 socket, it is incompatible with previous generations due to electrical changes in socket’s pins so these CPUs require Z370 chipset. This kind of generation introduced more cores in every range to compete with new AMD’s architecture. Coffee Lake uses DDR4 memory at 2400MHz for i3 and at 2666MHz for i5, i7 CPUs plus iGPU frequency has been increased 50MHz with respect to previous generation.
Using the multithread performance as a reference, the i7-8700 gets a score of 389 k points while the i7-8700k gets 443.8 k points.
Summarizing, the i7-8700k is 1.1 times faster than the i7-8700. To get a proper comparison between both models, take a look to the data shown below.
Specs
CPUID
906ea
906ea
Core
Coffee Lake-S
Coffee Lake-S
Base frecuency
3.2 GHz
3.7 GHz
Boost frecuency
4.6 GHz
4.7 GHz
Socket
LGA 1151
LGA 1151
Cores/Threads
6/12
6/12
TDP
65 W
95 W
Cache L1 (d+i)
6x32+6x32 kB
6x32+6x32 kB
Cache L2
6x256 kB
6x256 kB
Cache L3
12288 kB
12288 kB
Date
October 2017
October 2017
Mean monothread perf.
75.01k points
80.6k points
Mean multithread perf.
388.95k 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
i7-8700
i7-8700k
Test#1 (Integers)
4.48k
4.13k (x0.92)
Test#2 (FP)
18.31k
16.96k (x0.93)
Test#3 (Generic, ZIP)
5.88k
5.56k (x0.95)
Test#1 (Memory)
13.45k
12.85k (x0.95)
TOTAL
42.12k
39.5k (x0.94)
Multithread
i7-8700
i7-8700k
Test#1 (Integers)
27.35k
24.01k (x0.88)
Test#2 (FP)
124.94k
108.69k (x0.87)
Test#3 (Generic, ZIP)
43.23k
36.62k (x0.85)
Test#1 (Memory)
7.08k
9.33k (x1.32)
TOTAL
202.61k
178.64k (x0.88)
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
i7-8700
i7-8700k
Test#1 (Integers)
16.45k
12.92k (x0.79)
Test#2 (FP)
23.74k
20.68k (x0.87)
Test#3 (Generic, ZIP)
6.24k
5.3k (x0.85)
Test#1 (Memory)
13.43k
12.59k (x0.94)
TOTAL
59.86k
51.48k (x0.86)
Multithread
i7-8700
i7-8700k
Test#1 (Integers)
100.94k
94.26k (x0.93)
Test#2 (FP)
159.09k
152.55k (x0.96)
Test#3 (Generic, ZIP)
43.61k
39.74k (x0.91)
Test#1 (Memory)
6.59k
8.53k (x1.29)
TOTAL
310.23k
295.07k (x0.95)
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
i7-8700
i7-8700k
Test#1 (Integers)
16.57k
16.87k (x1.02)
Test#2 (FP)
25.52k
26.12k (x1.02)
Test#3 (Generic, ZIP)
6.01k
6.33k (x1.05)
Test#1 (Memory)
12.82k
13.71k (x1.07)
TOTAL
60.92k
63.03k (x1.03)
Multithread
i7-8700
i7-8700k
Test#1 (Integers)
101.85k
105.74k (x1.04)
Test#2 (FP)
170.31k
180.52k (x1.06)
Test#3 (Generic, ZIP)
43.12k
44.99k (x1.04)
Test#1 (Memory)
7.11k
8.51k (x1.2)
TOTAL
322.39k
339.77k (x1.05)
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
i7-8700
i7-8700k
Test#1 (Integers)
29.25k
31.2k (x1.07)
Test#2 (FP)
25.98k
27.82k (x1.07)
Test#3 (Generic, ZIP)
6.05k
6.57k (x1.09)
Test#1 (Memory)
13.74k
15k (x1.09)
TOTAL
75.01k
80.6k (x1.07)
Multithread
i7-8700
i7-8700k
Test#1 (Integers)
182.56k
202.42k (x1.11)
Test#2 (FP)
159.9k
186.33k (x1.17)
Test#3 (Generic, ZIP)
38.18k
44.96k (x1.18)
Test#1 (Memory)
8.31k
10.05k (x1.21)
TOTAL
388.95k
443.77k (x1.14)
Performance/W
i7-8700
i7-8700k
Test#1 (Integers)
2809 points/W
2131 points/W
Test#2 (FP)
2460 points/W
1961 points/W
Test#3 (Generic, ZIP)
587 points/W
473 points/W
Test#1 (Memory)
128 points/W
106 points/W
TOTAL
5984 points/W
4671 points/W
Performance/GHz
i7-8700
i7-8700k
Test#1 (Integers)
6358 points/GHz
6639 points/GHz
Test#2 (FP)
5647 points/GHz
5919 points/GHz
Test#3 (Generic, ZIP)
1316 points/GHz
1397 points/GHz
Test#1 (Memory)
2986 points/GHz
3192 points/GHz
TOTAL
16307 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.
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