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Core i9-7980XE vs i9-9900K


Description
The i9-7980XE is based on Skylake architecture while the i9-9900K is based on Coffee Lake.

Using the multithread performance as a reference, the i9-7980XE gets a score of 1223.8 k points while the i9-9900K gets 529.3 k points.

Summarizing, the i9-7980XE is 2.3 times faster than the i9-9900K. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
50654
906ed
Core
Skylake-X
Coffee Lake-S
Architecture
Base frecuency
2.6 GHz
3.6 GHz
Boost frecuency
4.4 GHz
5 GHz
Socket
LGA 2066
LGA 1151
Cores/Threads
18/36
8/16
TDP
165 W
95 W
Cache L1 (d+i)
18x32+18x32 kB
8x32+8x32 kB
Cache L2
18x1024 kB
8x256 kB
Cache L3
25344 kB
16384 kB
Date
May 2017
October 2018
Mean monothread perf.
76.43k points
81.91k points
Mean multithread perf.
1223.79k points
529.32k 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
i9-7980XE
i9-9900K
Test#1 (Integers)
4.89k
5k (x1.02)
Test#2 (FP)
19.98k
20.22k (x1.01)
Test#3 (Generic, ZIP)
6.14k
6.54k (x1.07)
Test#1 (Memory)
9.81k
13.78k (x1.4)
TOTAL
40.82k
45.53k (x1.12)

Multithread

i9-7980XE

i9-9900K
Test#1 (Integers)
79.8k
36.39k (x0.46)
Test#2 (FP)
372.72k
166.55k (x0.45)
Test#3 (Generic, ZIP)
121.42k
54.92k (x0.45)
Test#1 (Memory)
26.48k
8.96k (x0.34)
TOTAL
600.43k
266.82k (x0.44)

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
i9-7980XE
i9-9900K
Test#1 (Integers)
31.16k
32.08k (x1.03)
Test#2 (FP)
28.13k
28.17k (x1)
Test#3 (Generic, ZIP)
6.65k
6.68k (x1)
Test#1 (Memory)
10.5k
14.98k (x1.43)
TOTAL
76.43k
81.91k (x1.07)

Multithread

i9-7980XE

i9-9900K
Test#1 (Integers)
560.19k
242.98k (x0.43)
Test#2 (FP)
516.97k
220.16k (x0.43)
Test#3 (Generic, ZIP)
123.94k
53.97k (x0.44)
Test#1 (Memory)
22.69k
12.22k (x0.54)
TOTAL
1223.79k
529.32k (x0.43)

Performance/W
i9-7980XE
i9-9900K
Test#1 (Integers)
3395 points/W
2558 points/W
Test#2 (FP)
3133 points/W
2317 points/W
Test#3 (Generic, ZIP)
751 points/W
568 points/W
Test#1 (Memory)
137 points/W
129 points/W
TOTAL
7417 points/W
5572 points/W

Performance/GHz
i9-7980XE
i9-9900K
Test#1 (Integers)
7081 points/GHz
6417 points/GHz
Test#2 (FP)
6392 points/GHz
5634 points/GHz
Test#3 (Generic, ZIP)
1512 points/GHz
1335 points/GHz
Test#1 (Memory)
2386 points/GHz
2996 points/GHz
TOTAL
17371 points/GHz
16382 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