| | | | | | |

Core i7-5820K vs i5-8265U


Description
The i7-5820K is based on Haswell architecture while the i5-8265U is based on Whiskey Lake.

Using the multithread performance as a reference, the i7-5820K gets a score of 129.1 k points while the i5-8265U gets 151.4 k points.

Summarizing, the i5-8265U is 1.2 times faster than the i7-5820K . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
306f2
806ec
Core
Haswell-E
Whiskey Lake-U
Architecture
Base frecuency
3.3 GHz
1.6 GHz
Boost frecuency
3.6 GHz
3.9 GHz
Socket
LGA 1150
BGA1528
Cores/Threads
6/12
4/8
TDP
140 W
15 W
Cache L1 (d+i)
32+32 kB
4x32+4x32 kB
Cache L2
256 kB
4x256 kB
Cache L3
15360 kB
6144 kB
Date
September 2014
August 2018
Mean monothread perf.
31.53k points
46.67k points
Mean multithread perf.
129.06k points
143.23k 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
i7-5820K
i5-8265U
Test#1 (Integers)
3.82k
3.68k (x0.96)
Test#2 (FP)
9.64k
16.08k (x1.67)
Test#3 (Generic, ZIP)
4.29k
4.99k (x1.16)
Test#1 (Memory)
3.78k
7.95k (x2.1)
TOTAL
21.53k
32.69k (x1.52)

Multithread

i7-5820K

i5-8265U
Test#1 (Integers)
18.07k
14.29k (x0.79)
Test#2 (FP)
64.25k
61.15k (x0.95)
Test#3 (Generic, ZIP)
27.03k
16.53k (x0.61)
Test#1 (Memory)
8.03k
3.72k (x0.46)
TOTAL
117.38k
95.69k (x0.82)

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
i7-5820K
i5-8265U
Test#1 (Integers)
12.03k
13.66k (x1.13)
Test#2 (FP)
11.23k
21.17k (x1.89)
Test#3 (Generic, ZIP)
4.55k
5k (x1.1)
Test#1 (Memory)
3.72k
8.11k (x2.18)
TOTAL
31.53k
47.94k (x1.52)

Multithread

i7-5820K

i5-8265U
Test#1 (Integers)
49.48k
51.36k (x1.04)
Test#2 (FP)
52.21k
79.72k (x1.53)
Test#3 (Generic, ZIP)
19.7k
16.61k (x0.84)
Test#1 (Memory)
7.67k
3.75k (x0.49)
TOTAL
129.06k
151.44k (x1.17)

Performance/W
i7-5820K
i5-8265U
Test#1 (Integers)
353 points/W
3424 points/W
Test#2 (FP)
373 points/W
5314 points/W
Test#3 (Generic, ZIP)
141 points/W
1108 points/W
Test#1 (Memory)
55 points/W
250 points/W
TOTAL
922 points/W
10096 points/W

Performance/GHz
i7-5820K
i5-8265U
Test#1 (Integers)
3343 points/GHz
3502 points/GHz
Test#2 (FP)
3119 points/GHz
5429 points/GHz
Test#3 (Generic, ZIP)
1264 points/GHz
1282 points/GHz
Test#1 (Memory)
1033 points/GHz
2081 points/GHz
TOTAL
8759 points/GHz
12293 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