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Core 2 Duo P8400 vs Core 2 Quad Q8400


Description
Both models P8400 and Q8400 are based on Core architecture.



Using the multithread performance as a reference, the P8400 gets a score of 21 k points while the Q8400 gets 51.9 k points.

Summarizing, the Q8400 is 2.5 times faster than the P8400. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
10676
1067a
Core
Peryn-3M
Yorkfield
Architecture
Base frecuency
2.267 GHz
2.666 GHz
Socket
Socket P
LGA 775
Cores/Threads
2/2
4/4
TDP
25 W
95 W
Cache L1 (d+i)
2x32 kB
128+128 kB
Cache L2
3072 kB
4096 kB
Date
July 2008
April 2009
Mean monothread perf.
11.38k points
14.04k points
Mean multithread perf.
21.02k points
51.92k 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
P8400
Q8400
Test#1 (Integers)
1.78k
2.44k (x1.37)
Test#2 (FP)
4.95k
6.24k (x1.26)
Test#3 (Generic, ZIP)
2.08k
2.62k (x1.26)
Test#1 (Memory)
1.44k
1.43k (x0.99)
TOTAL
10.24k
12.73k (x1.24)

Multithread

P8400

Q8400
Test#1 (Integers)
3.53k
9.71k (x2.75)
Test#2 (FP)
9.75k
24.81k (x2.54)
Test#3 (Generic, ZIP)
4.07k
10.51k (x2.58)
Test#1 (Memory)
1.44k
2.03k (x1.41)
TOTAL
18.79k
47.05k (x2.5)

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
P8400
Q8400
Test#1 (Integers)
2.43k
3.08k (x1.27)
Test#2 (FP)
5.4k
6.8k (x1.26)
Test#3 (Generic, ZIP)
2.13k
2.73k (x1.28)
Test#1 (Memory)
1.43k
1.42k (x0.99)
TOTAL
11.38k
14.04k (x1.23)

Multithread

P8400

Q8400
Test#1 (Integers)
4.81k
12.25k (x2.54)
Test#2 (FP)
10.58k
26.84k (x2.54)
Test#3 (Generic, ZIP)
4.18k
10.82k (x2.59)
Test#1 (Memory)
1.45k
2.02k (x1.39)
TOTAL
21.02k
51.92k (x2.47)

Performance/W
P8400
Q8400
Test#1 (Integers)
193 points/W
129 points/W
Test#2 (FP)
423 points/W
283 points/W
Test#3 (Generic, ZIP)
167 points/W
114 points/W
Test#1 (Memory)
58 points/W
21 points/W
TOTAL
841 points/W
547 points/W

Performance/GHz
P8400
Q8400
Test#1 (Integers)
1071 points/GHz
1157 points/GHz
Test#2 (FP)
2383 points/GHz
2551 points/GHz
Test#3 (Generic, ZIP)
938 points/GHz
1025 points/GHz
Test#1 (Memory)
629 points/GHz
532 points/GHz
TOTAL
5022 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