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Core i9-9900K vs i5-12400


Description
The i9-9900K is based on Coffee Lake architecture while the i5-12400 is based on Alder Lake.

Using the multithread performance as a reference, the i9-9900K gets a score of 529.3 k points while the i5-12400 gets 544.6 k points.

Summarizing, the i5-12400 is 1 times faster than the i9-9900K. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
906ed
90672
Core
Coffee Lake-S
Arder Lake-S
Architecture
Base frecuency
3.6 GHz
2.5 GHz
Boost frecuency
5 GHz
4.4 GHz
Socket
LGA 1151
LGA 1700
Cores/Threads
8/16
6/12
TDP
95 W
65 W
Cache L1 (d+i)
8x32+8x32 kB
6x32+6x48 kB
Cache L2
8x256 kB
6x1280 kB
Cache L3
16384 kB
18432 kB
Date
October 2018
January 2022
Mean monothread perf.
81.91k points
102.51k points
Mean multithread perf.
529.32k points
544.64k 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
i5-12400
Test#1 (Integers)
5k
7.51k (x1.5)
Test#2 (FP)
20.22k
18.66k (x0.92)
Test#3 (Generic, ZIP)
6.54k
13.32k (x2.04)
Test#1 (Memory)
13.78k
14.8k (x1.07)
TOTAL
45.53k
54.29k (x1.19)

Multithread

i9-9900K

i5-12400
Test#1 (Integers)
36.39k
35.52k (x0.98)
Test#2 (FP)
166.55k
138.43k (x0.83)
Test#3 (Generic, ZIP)
54.92k
85.55k (x1.56)
Test#1 (Memory)
8.96k
21.72k (x2.42)
TOTAL
266.82k
281.22k (x1.05)

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
i5-12400
Test#1 (Integers)
18.03k
24.24k (x1.34)
Test#2 (FP)
25.98k
23.92k (x0.92)
Test#3 (Generic, ZIP)
6.86k
14.43k (x2.1)
Test#1 (Memory)
14.5k
14.84k (x1.02)
TOTAL
65.37k
77.43k (x1.18)

Multithread

i9-9900K

i5-12400
Test#1 (Integers)
131.34k
124.33k (x0.95)
Test#2 (FP)
204.76k
168.8k (x0.82)
Test#3 (Generic, ZIP)
55.74k
100k (x1.79)
Test#1 (Memory)
8.99k
21.2k (x2.36)
TOTAL
400.83k
414.33k (x1.03)

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
i5-12400
Test#1 (Integers)
17.98k
23.84k (x1.33)
Test#2 (FP)
27.04k
25.09k (x0.93)
Test#3 (Generic, ZIP)
6.63k
14.1k (x2.13)
Test#1 (Memory)
13.6k
14.48k (x1.06)
TOTAL
65.24k
77.51k (x1.19)

Multithread

i9-9900K

i5-12400
Test#1 (Integers)
130.88k
123.98k (x0.95)
Test#2 (FP)
208.5k
176.89k (x0.85)
Test#3 (Generic, ZIP)
54.12k
97.42k (x1.8)
Test#1 (Memory)
8.91k
20.78k (x2.33)
TOTAL
402.41k
419.07k (x1.04)

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
i5-12400
Test#1 (Integers)
32.08k
48.08k (x1.5)
Test#2 (FP)
28.17k
25.6k (x0.91)
Test#3 (Generic, ZIP)
6.68k
14.02k (x2.1)
Test#1 (Memory)
14.98k
14.81k (x0.99)
TOTAL
81.91k
102.51k (x1.25)

Multithread

i9-9900K

i5-12400
Test#1 (Integers)
242.98k
230.14k (x0.95)
Test#2 (FP)
220.16k
198.07k (x0.9)
Test#3 (Generic, ZIP)
53.97k
94.78k (x1.76)
Test#1 (Memory)
12.22k
21.64k (x1.77)
TOTAL
529.32k
544.64k (x1.03)

Performance/W
i9-9900K
i5-12400
Test#1 (Integers)
2558 points/W
3541 points/W
Test#2 (FP)
2317 points/W
3047 points/W
Test#3 (Generic, ZIP)
568 points/W
1458 points/W
Test#1 (Memory)
129 points/W
333 points/W
TOTAL
5572 points/W
8379 points/W

Performance/GHz
i9-9900K
i5-12400
Test#1 (Integers)
6417 points/GHz
10927 points/GHz
Test#2 (FP)
5634 points/GHz
5819 points/GHz
Test#3 (Generic, ZIP)
1335 points/GHz
3186 points/GHz
Test#1 (Memory)
2996 points/GHz
3365 points/GHz
TOTAL
16382 points/GHz
23298 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