Core i9-11900K vs i7-1255U
Description
The i9-11900K is based on Rocket Lake architecture while the i7-1255U is based on Alder Lake.
Using the multithread performance as a reference, the i9-11900K gets a score of 748 k points while the i7-1255U gets 258.3 k points.
Summarizing, the i9-11900K is 2.9 times faster than the i7-1255U. To get a proper comparison between both models, take a look to the data shown below.
Using the multithread performance as a reference, the i9-11900K gets a score of 748 k points while the i7-1255U gets 258.3 k points.
Summarizing, the i9-11900K is 2.9 times faster than the i7-1255U. To get a proper comparison between both models, take a look to the data shown below.
Specs
CPUID
a0671
906a4
Core
Rocket Lake-S
Alder Lake-U
Base frecuency
3.5 GHz
1.7 GHz
Boost frecuency
5.3 GHz
4.7 GHz
Socket
LGA 1200
BGA 1744
Cores/Threads
8/16
10/12
TDP
125 W
15 W
Cache L1 (d+i)
8x32+8x48 kB
2x32/8x64+2x48/8x32 kB
Cache L2
8x512 kB
2x1280+2x2048 kB
Cache L3
16386 kB
12288 kB
Date
March 2021
February 2022
Mean monothread perf.
101.11k points
81.73k points
Mean multithread perf.
748.02k points
258.31k 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
i9-11900K
i7-1255U
Test#1 (Integers)
36.08k
38.32k (x1.06)
Test#2 (FP)
30.19k
21.35k (x0.71)
Test#3 (Generic, ZIP)
12.96k
11.2k (x0.86)
Test#1 (Memory)
21.88k
10.86k (x0.5)
TOTAL
101.11k
81.73k (x0.81)
Multithread
i9-11900K
i7-1255U
Test#1 (Integers)
311.76k
105.48k (x0.34)
Test#2 (FP)
314.01k
100.18k (x0.32)
Test#3 (Generic, ZIP)
112.23k
43.39k (x0.39)
Test#1 (Memory)
10.02k
9.26k (x0.92)
TOTAL
748.02k
258.31k (x0.35)
Performance/W
i9-11900K
i7-1255U
Test#1 (Integers)
2494 points/W
7032 points/W
Test#2 (FP)
2512 points/W
6678 points/W
Test#3 (Generic, ZIP)
898 points/W
2893 points/W
Test#1 (Memory)
80 points/W
617 points/W
TOTAL
5984 points/W
17221 points/W
Performance/GHz
i9-11900K
i7-1255U
Test#1 (Integers)
6807 points/GHz
8154 points/GHz
Test#2 (FP)
5695 points/GHz
4543 points/GHz
Test#3 (Generic, ZIP)
2446 points/GHz
2382 points/GHz
Test#1 (Memory)
4129 points/GHz
2311 points/GHz
TOTAL
19077 points/GHz
17390 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