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Core i9-9900K vs i5-8259U


Description
Both models i9-9900K and i5-8259U 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 545.3 k points while the i5-8259U gets 229 k points.

Summarizing, the i9-9900K is 2.4 times faster than the i5-8259U. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
906ec
806ea
Core
Coffee Lake-S
Coffee Lake-U
Architecture
Base frecuency
3.6 GHz
2.3 GHz
Boost frecuency
5 GHz
3.8 GHz
Socket
LGA 1151
BGA 1528
Cores/Threads
8/16
4/8
TDP
95 W
28 W
Cache L1 (d+i)
8x32+8x32 kB
4x32+x4x32 kB
Cache L2
8x256 kB
4x256 kB
Cache L3
16384 kB
6144 kB
Date
October 2018
March 2018
Mean monothread perf.
86.24k points
54.55k points
Mean multithread perf.
545.3k points
229k 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
i9-9900K
i5-8259U
Test#1 (Integers)
33.62k
21.06k (x0.63)
Test#2 (FP)
30.02k
19.79k (x0.66)
Test#3 (Generic, ZIP)
7.17k
4.72k (x0.66)
Test#1 (Memory)
15.43k
8.98k (x0.58)
TOTAL
86.24k
54.55k (x0.63)

Multithread

i9-9900K

i5-8259U
Test#1 (Integers)
248.93k
96.43k (x0.39)
Test#2 (FP)
224.43k
85.46k (x0.38)
Test#3 (Generic, ZIP)
53.39k
22.31k (x0.42)
Test#1 (Memory)
18.54k
24.81k (x1.34)
TOTAL
545.3k
229k (x0.42)

Performance/W
i9-9900K
i5-8259U
Test#1 (Integers)
2620 points/W
3444 points/W
Test#2 (FP)
2362 points/W
3052 points/W
Test#3 (Generic, ZIP)
562 points/W
797 points/W
Test#1 (Memory)
195 points/W
886 points/W
TOTAL
5740 points/W
8179 points/W

Performance/GHz
i9-9900K
i5-8259U
Test#1 (Integers)
6724 points/GHz
5543 points/GHz
Test#2 (FP)
6003 points/GHz
5208 points/GHz
Test#3 (Generic, ZIP)
1434 points/GHz
1241 points/GHz
Test#1 (Memory)
3087 points/GHz
2363 points/GHz
TOTAL
17247 points/GHz
14355 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