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Snapdragon 7c Gen 2 vs Celeron 3855U


Description
The 7c Gen 2 is based on Cortex-A76 / A55 (Kryo 468) architecture while the 3855U is based on Skylake.

Using the multithread performance as a reference, the 7c Gen 2 gets a score of 37 k points while the 3855U gets 24.6 k points.

Summarizing, the 7c Gen 2 is 1.5 times faster than the 3855U. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
f4a
406e3
Core
Cortex-A76 / A55 (Kryo 468)
Skylake-U
Architecture
Cortex-A76 / A55 (Kryo 468)
Base frecuency
2.55 GHz
1.6 GHz
Socket
-
BGA1356
Cores/Threads
8/8
2/2
TDP
7 W
15 W
Cache L1 (d+i)
- kB
2x32+2x32 kB
Cache L2
- kB
2x256 kB
Cache L3
- kB
2096 kB
Date
May 2021
December 2015
Mean monothread perf.
16.53k points
19.24k points
Mean multithread perf.
37k points
24.56k points

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
7c Gen 2
3855U
Test#1 (Integers)
3.87k
5.93k (x1.53)
Test#2 (FP)
8.17k
8.53k (x1.04)
Test#3 (Generic, ZIP)
2.67k
2.28k (x0.85)
Test#1 (Memory)
1.82k
2.5k (x1.38)
TOTAL
16.53k
19.24k (x1.16)

Multithread

7c Gen 2

3855U
Test#1 (Integers)
3.46k
7.87k (x2.27)
Test#2 (FP)
22.59k
11.28k (x0.5)
Test#3 (Generic, ZIP)
8.09k
2.91k (x0.36)
Test#1 (Memory)
2.85k
2.5k (x0.88)
TOTAL
37k
24.56k (x0.66)

Performance/W
7c Gen 2
3855U
Test#1 (Integers)
495 points/W
524 points/W
Test#2 (FP)
3228 points/W
752 points/W
Test#3 (Generic, ZIP)
1156 points/W
194 points/W
Test#1 (Memory)
407 points/W
166 points/W
TOTAL
5286 points/W
1637 points/W

Performance/GHz
7c Gen 2
3855U
Test#1 (Integers)
1516 points/GHz
3706 points/GHz
Test#2 (FP)
3205 points/GHz
5333 points/GHz
Test#3 (Generic, ZIP)
1047 points/GHz
1423 points/GHz
Test#1 (Memory)
712 points/GHz
1562 points/GHz
TOTAL
6481 points/GHz
12024 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