Core i9-9900K vs i7-8700k
Description
Both models i9-9900K 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 i9-9900K gets a score of 529.3 k points while the i7-8700k gets 443.8 k points.
Summarizing, the i9-9900K is 1.2 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 i9-9900K gets a score of 529.3 k points while the i7-8700k gets 443.8 k points.
Summarizing, the i9-9900K is 1.2 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
16384 kB
12288 kB
Date
October 2018
October 2017
Mean monothread perf.
81.91k points
80.6k points
Mean multithread perf.
529.32k 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
i9-9900K
i7-8700k
Test#1 (Integers)
5k
4.13k (x0.83)
Test#2 (FP)
20.22k
16.96k (x0.84)
Test#3 (Generic, ZIP)
6.54k
5.56k (x0.85)
Test#1 (Memory)
13.78k
12.85k (x0.93)
TOTAL
45.53k
39.5k (x0.87)
Multithread
i9-9900K
i7-8700k
Test#1 (Integers)
36.39k
24.01k (x0.66)
Test#2 (FP)
166.55k
108.69k (x0.65)
Test#3 (Generic, ZIP)
54.92k
36.62k (x0.67)
Test#1 (Memory)
8.96k
9.33k (x1.04)
TOTAL
266.82k
178.64k (x0.67)
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
i9-9900K
i7-8700k
Test#1 (Integers)
18.03k
12.92k (x0.72)
Test#2 (FP)
25.98k
20.68k (x0.8)
Test#3 (Generic, ZIP)
6.86k
5.3k (x0.77)
Test#1 (Memory)
14.5k
12.59k (x0.87)
TOTAL
65.37k
51.48k (x0.79)
Multithread
i9-9900K
i7-8700k
Test#1 (Integers)
131.34k
94.26k (x0.72)
Test#2 (FP)
204.76k
152.55k (x0.75)
Test#3 (Generic, ZIP)
55.74k
39.74k (x0.71)
Test#1 (Memory)
8.99k
8.53k (x0.95)
TOTAL
400.83k
295.07k (x0.74)
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
i9-9900K
i7-8700k
Test#1 (Integers)
17.98k
16.87k (x0.94)
Test#2 (FP)
27.04k
26.12k (x0.97)
Test#3 (Generic, ZIP)
6.63k
6.33k (x0.96)
Test#1 (Memory)
13.6k
13.71k (x1.01)
TOTAL
65.24k
63.03k (x0.97)
Multithread
i9-9900K
i7-8700k
Test#1 (Integers)
130.88k
105.74k (x0.81)
Test#2 (FP)
208.5k
180.52k (x0.87)
Test#3 (Generic, ZIP)
54.12k
44.99k (x0.83)
Test#1 (Memory)
8.91k
8.51k (x0.96)
TOTAL
402.41k
339.77k (x0.84)
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
i9-9900K
i7-8700k
Test#1 (Integers)
32.08k
31.2k (x0.97)
Test#2 (FP)
28.17k
27.82k (x0.99)
Test#3 (Generic, ZIP)
6.68k
6.57k (x0.98)
Test#1 (Memory)
14.98k
15k (x1)
TOTAL
81.91k
80.6k (x0.98)
Multithread
i9-9900K
i7-8700k
Test#1 (Integers)
242.98k
202.42k (x0.83)
Test#2 (FP)
220.16k
186.33k (x0.85)
Test#3 (Generic, ZIP)
53.97k
44.96k (x0.83)
Test#1 (Memory)
12.22k
10.05k (x0.82)
TOTAL
529.32k
443.77k (x0.84)
Performance/W
i9-9900K
i7-8700k
Test#1 (Integers)
2558 points/W
2131 points/W
Test#2 (FP)
2317 points/W
1961 points/W
Test#3 (Generic, ZIP)
568 points/W
473 points/W
Test#1 (Memory)
129 points/W
106 points/W
TOTAL
5572 points/W
4671 points/W
Performance/GHz
i9-9900K
i7-8700k
Test#1 (Integers)
6417 points/GHz
6639 points/GHz
Test#2 (FP)
5634 points/GHz
5919 points/GHz
Test#3 (Generic, ZIP)
1335 points/GHz
1397 points/GHz
Test#1 (Memory)
2996 points/GHz
3192 points/GHz
TOTAL
16382 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