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Core 2 Quad Q6700 vs Q8400


Description
Both models Q6700 and Q8400 are based on Core architecture.



Using the multithread performance as a reference, the Q6700 gets a score of 19.8 k points while the Q8400 gets 51.9 k points.

Summarizing, the Q8400 is 2.6 times faster than the Q6700. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
6fb
1067a
Core
Kentsfield
Yorkfield
Architecture
Base frecuency
2.666 GHz
2.666 GHz
Socket
LGA 775
LGA 775
Cores/Threads
4/4
4/4
TDP
95 W
95 W
Cache L1 (d+i)
4x32+4x32 kB
128+128 kB
Cache L2
8192 kB
4096 kB
Cache L3
kB
0 kB
Date
April 2007
April 2009
Mean monothread perf.
10.05k points
14.04k points
Mean multithread perf.
19.77k 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
Q6700
Q8400
Test#1 (Integers)
3.06k
3.08k (x1.01)
Test#2 (FP)
2.74k
6.8k (x2.48)
Test#3 (Generic, ZIP)
2.56k
2.73k (x1.07)
Test#1 (Memory)
1.68k
1.42k (x0.84)
TOTAL
10.05k
14.04k (x1.4)

Multithread

Q6700

Q8400
Test#1 (Integers)
7.28k
12.25k (x1.68)
Test#2 (FP)
5.83k
26.84k (x4.6)
Test#3 (Generic, ZIP)
5.13k
10.82k (x2.11)
Test#1 (Memory)
1.53k
2.02k (x1.32)
TOTAL
19.77k
51.92k (x2.63)

Performance/W
Q6700
Q8400
Test#1 (Integers)
77 points/W
129 points/W
Test#2 (FP)
61 points/W
283 points/W
Test#3 (Generic, ZIP)
54 points/W
114 points/W
Test#1 (Memory)
16 points/W
21 points/W
TOTAL
208 points/W
547 points/W

Performance/GHz
Q6700
Q8400
Test#1 (Integers)
1146 points/GHz
1157 points/GHz
Test#2 (FP)
1029 points/GHz
2551 points/GHz
Test#3 (Generic, ZIP)
962 points/GHz
1025 points/GHz
Test#1 (Memory)
632 points/GHz
532 points/GHz
TOTAL
3768 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