Core i9-9900KF vs i7-8700k
Description
Both models i9-9900KF 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 i9-9900KF gets a score of 592.9 k points while the i7-8700k gets 443.8 k points.
Summarizing, the i9-9900KF is 1.3 times faster than the i7-8700k. 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 i9-9900KF gets a score of 592.9 k points while the i7-8700k gets 443.8 k points.
Summarizing, the i9-9900KF is 1.3 times faster than the i7-8700k. To get a proper comparison between both models, take a look to the data shown below.
Specs
CPUID
906ed
906ea
Core
Coffee Lake-S
Coffee Lake-S
Base frecuency
3.6 GHz
3.7 GHz
Boost frecuency
5 GHz
4.7 GHz
Socket
LGA 1151
LGA 1151
Cores/Threads
8/16
6/12
TDP
95 W
95 W
Cache L1 (d+i)
8x32+8x32 kB
6x32+6x32 kB
Cache L2
8x256 kB
6x256 kB
Cache L3
16386 kB
12288 kB
Date
January 2019
October 2017
Mean monothread perf.
84.54k points
80.6k points
Mean multithread perf.
592.86k points
443.77k points
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
i9-9900KF
i7-8700k
Test#1 (Integers)
33.03k
31.2k (x0.94)
Test#2 (FP)
29.52k
27.82k (x0.94)
Test#3 (Generic, ZIP)
6.55k
6.57k (x1)
Test#1 (Memory)
15.45k
15k (x0.97)
TOTAL
84.54k
80.6k (x0.95)
Multithread
i9-9900KF
i7-8700k
Test#1 (Integers)
276.22k
202.42k (x0.73)
Test#2 (FP)
250.61k
186.33k (x0.74)
Test#3 (Generic, ZIP)
57.2k
44.96k (x0.79)
Test#1 (Memory)
8.84k
10.05k (x1.14)
TOTAL
592.86k
443.77k (x0.75)
Performance/W
i9-9900KF
i7-8700k
Test#1 (Integers)
2908 points/W
2131 points/W
Test#2 (FP)
2638 points/W
1961 points/W
Test#3 (Generic, ZIP)
602 points/W
473 points/W
Test#1 (Memory)
93 points/W
106 points/W
TOTAL
6241 points/W
4671 points/W
Performance/GHz
i9-9900KF
i7-8700k
Test#1 (Integers)
6605 points/GHz
6639 points/GHz
Test#2 (FP)
5904 points/GHz
5919 points/GHz
Test#3 (Generic, ZIP)
1309 points/GHz
1397 points/GHz
Test#1 (Memory)
3090 points/GHz
3192 points/GHz
TOTAL
16909 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