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Core 2 Duo E7400 vs Core 2 Quad Q8400


Description
Both models E7400 and Q8400 are based on Core architecture.



Using the multithread performance as a reference, the E7400 gets a score of 25.7 k points while the Q8400 gets 51.9 k points.

Summarizing, the Q8400 is 2 times faster than the E7400 . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
1067a
1067a
Core
Wolfdale
Yorkfield
Architecture
Base frecuency
2.8 GHz
2.666 GHz
Socket
LGA 775
LGA 775
Cores/Threads
2/2
4/4
TDP
65 W
95 W
Cache L1 (d+i)
32+32 kB
128+128 kB
Cache L2
3072 kB
4096 kB
Date
October 2008
April 2009
Mean monothread perf.
14.31k points
14.04k points
Mean multithread perf.
25.71k 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
E7400
Q8400
Test#1 (Integers)
2.54k
2.44k (x0.96)
Test#2 (FP)
6.56k
6.24k (x0.95)
Test#3 (Generic, ZIP)
2.73k
2.62k (x0.96)
Test#1 (Memory)
1.83k
1.43k (x0.78)
TOTAL
13.66k
12.73k (x0.93)

Multithread

E7400

Q8400
Test#1 (Integers)
5.08k
9.71k (x1.91)
Test#2 (FP)
13.07k
24.81k (x1.9)
Test#3 (Generic, ZIP)
5.52k
10.51k (x1.9)
Test#1 (Memory)
1.62k
2.03k (x1.25)
TOTAL
25.29k
47.05k (x1.86)

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
E7400
Q8400
Test#1 (Integers)
3.19k
3.08k (x0.97)
Test#2 (FP)
7.02k
6.8k (x0.97)
Test#3 (Generic, ZIP)
2.71k
2.73k (x1.01)
Test#1 (Memory)
1.39k
1.42k (x1.02)
TOTAL
14.31k
14.04k (x0.98)

Multithread

E7400

Q8400
Test#1 (Integers)
6.02k
12.25k (x2.04)
Test#2 (FP)
13.23k
26.84k (x2.03)
Test#3 (Generic, ZIP)
5.12k
10.82k (x2.11)
Test#1 (Memory)
1.34k
2.02k (x1.5)
TOTAL
25.71k
51.92k (x2.02)

Performance/W
E7400
Q8400
Test#1 (Integers)
93 points/W
129 points/W
Test#2 (FP)
204 points/W
283 points/W
Test#3 (Generic, ZIP)
79 points/W
114 points/W
Test#1 (Memory)
21 points/W
21 points/W
TOTAL
396 points/W
547 points/W

Performance/GHz
E7400
Q8400
Test#1 (Integers)
1139 points/GHz
1157 points/GHz
Test#2 (FP)
2507 points/GHz
2551 points/GHz
Test#3 (Generic, ZIP)
969 points/GHz
1025 points/GHz
Test#1 (Memory)
496 points/GHz
532 points/GHz
TOTAL
5111 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