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Snapdragon 7c Gen 2 vs Core 2 Quad Q8400


Description
The 7c Gen 2 is based on Cortex-A76 / A55 (Kryo 468) architecture while the Q8400 is based on Core.

Using the multithread performance as a reference, the 7c Gen 2 gets a score of 37 k points while the Q8400 gets 51.9 k points.

Summarizing, the Q8400 is 1.4 times faster than the 7c Gen 2. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
f4a
1067a
Core
Cortex-A76 / A55 (Kryo 468)
Yorkfield
Architecture
Cortex-A76 / A55 (Kryo 468)
Base frecuency
2.55 GHz
2.666 GHz
Socket
-
LGA 775
Cores/Threads
8/8
4/4
TDP
7 W
95 W
Cache L1 (d+i)
- kB
128+128 kB
Cache L2
- kB
4096 kB
Cache L3
- kB
0 kB
Date
May 2021
April 2009
Mean monothread perf.
16.53k points
14.04k points
Mean multithread perf.
37k points
51.92k 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
Q8400
Test#1 (Integers)
3.87k
3.08k (x0.8)
Test#2 (FP)
8.17k
6.8k (x0.83)
Test#3 (Generic, ZIP)
2.67k
2.73k (x1.02)
Test#1 (Memory)
1.82k
1.42k (x0.78)
TOTAL
16.53k
14.04k (x0.85)

Multithread

7c Gen 2

Q8400
Test#1 (Integers)
3.46k
12.25k (x3.54)
Test#2 (FP)
22.59k
26.84k (x1.19)
Test#3 (Generic, ZIP)
8.09k
10.82k (x1.34)
Test#1 (Memory)
2.85k
2.02k (x0.71)
TOTAL
37k
51.92k (x1.4)

Performance/W
7c Gen 2
Q8400
Test#1 (Integers)
495 points/W
129 points/W
Test#2 (FP)
3228 points/W
283 points/W
Test#3 (Generic, ZIP)
1156 points/W
114 points/W
Test#1 (Memory)
407 points/W
21 points/W
TOTAL
5286 points/W
547 points/W

Performance/GHz
7c Gen 2
Q8400
Test#1 (Integers)
1516 points/GHz
1157 points/GHz
Test#2 (FP)
3205 points/GHz
2551 points/GHz
Test#3 (Generic, ZIP)
1047 points/GHz
1025 points/GHz
Test#1 (Memory)
712 points/GHz
532 points/GHz
TOTAL
6481 points/GHz
5265 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