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Core 2 Quad Q8400 vs Q6600


Description
Both models Q8400 and Q6600 are based on Core architecture.



Using the multithread performance as a reference, the Q8400 gets a score of 51.9 k points while the Q6600 gets 30.6 k points.

Summarizing, the Q8400 is 1.7 times faster than the Q6600. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
1067a
6fb
Core
Yorkfield
Kentsfield
Architecture
Base frecuency
2.666 GHz
2.4 GHz
Socket
LGA 775
LGA 775
Cores/Threads
4/4
4/4
TDP
95 W
95 W
Cache L1 (d+i)
128+128 kB
4x32+4x32 kB
Cache L2
4096 kB
8192 kB
Cache L3
0 kB
kB
Date
April 2009
July 2007
Mean monothread perf.
14.04k points
8.92k points
Mean multithread perf.
51.92k points
30.64k 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
Q8400
Q6600
Test#1 (Integers)
3.08k
2.78k (x0.9)
Test#2 (FP)
6.8k
2.49k (x0.37)
Test#3 (Generic, ZIP)
2.73k
2.37k (x0.87)
Test#1 (Memory)
1.42k
1.29k (x0.91)
TOTAL
14.04k
8.92k (x0.64)

Multithread

Q8400

Q6600
Test#1 (Integers)
12.25k
10.9k (x0.89)
Test#2 (FP)
26.84k
9.79k (x0.36)
Test#3 (Generic, ZIP)
10.82k
9.11k (x0.84)
Test#1 (Memory)
2.02k
0.84k (x0.42)
TOTAL
51.92k
30.64k (x0.59)

Performance/W
Q8400
Q6600
Test#1 (Integers)
129 points/W
115 points/W
Test#2 (FP)
283 points/W
103 points/W
Test#3 (Generic, ZIP)
114 points/W
96 points/W
Test#1 (Memory)
21 points/W
9 points/W
TOTAL
547 points/W
323 points/W

Performance/GHz
Q8400
Q6600
Test#1 (Integers)
1157 points/GHz
1157 points/GHz
Test#2 (FP)
2551 points/GHz
1036 points/GHz
Test#3 (Generic, ZIP)
1025 points/GHz
986 points/GHz
Test#1 (Memory)
532 points/GHz
539 points/GHz
TOTAL
5265 points/GHz
3718 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