Core i7-640LM vs Core 2 Quad Q8400
Description
The i7-640LM is based on Westmere architecture while the Q8400 is based on Core.
Using the multithread performance as a reference, the i7-640LM gets a score of 31.7 k points while the Q8400 gets 51.9 k points.
Summarizing, the Q8400 is 1.6 times faster than the i7-640LM. To get a proper comparison between both models, take a look to the data shown below.
Using the multithread performance as a reference, the i7-640LM gets a score of 31.7 k points while the Q8400 gets 51.9 k points.
Summarizing, the Q8400 is 1.6 times faster than the i7-640LM. To get a proper comparison between both models, take a look to the data shown below.
Specs
CPUID
20655
1067a
Core
Calpella
Yorkfield
Base frecuency
2.133 GHz
2.666 GHz
Boost frecuency
2.667 GHz
2.666 GHz
Socket
BGA1288
LGA 775
Cores/Threads
2/4
4/4
TDP
25 W
95 W
Cache L1 (d+i)
2x32+2x32 kB
128+128 kB
Cache L2
2x256 kB
4096 kB
Cache L3
4096 kB
0 kB
Date
January 2010
April 2009
Mean monothread perf.
16.35k points
14.04k points
Mean multithread perf.
31.74k 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
i7-640LM
Q8400
Test#1 (Integers)
7.01k
3.08k (x0.44)
Test#2 (FP)
4.58k
6.8k (x1.48)
Test#3 (Generic, ZIP)
2.73k
2.73k (x1)
Test#1 (Memory)
2.03k
1.42k (x0.7)
TOTAL
16.35k
14.04k (x0.86)
Multithread
i7-640LM
Q8400
Test#1 (Integers)
12.93k
12.25k (x0.95)
Test#2 (FP)
10.21k
26.84k (x2.63)
Test#3 (Generic, ZIP)
6.22k
10.82k (x1.74)
Test#1 (Memory)
2.37k
2.02k (x0.85)
TOTAL
31.74k
51.92k (x1.64)
Performance/W
i7-640LM
Q8400
Test#1 (Integers)
517 points/W
129 points/W
Test#2 (FP)
409 points/W
283 points/W
Test#3 (Generic, ZIP)
249 points/W
114 points/W
Test#1 (Memory)
95 points/W
21 points/W
TOTAL
1269 points/W
547 points/W
Performance/GHz
i7-640LM
Q8400
Test#1 (Integers)
2627 points/GHz
1157 points/GHz
Test#2 (FP)
1718 points/GHz
2551 points/GHz
Test#3 (Generic, ZIP)
1024 points/GHz
1025 points/GHz
Test#1 (Memory)
762 points/GHz
532 points/GHz
TOTAL
6130 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.
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]
Test#2 (FP) [points vs time]
Test#3 (Generic, ZIP) [points vs time]
Test#1 (Memory) [points vs time]
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.
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]
Test#2 (FP) [points vs time]
Test#3 (Generic, ZIP) [points vs time]
Test#1 (Memory) [points vs time]
Hardlimit Benchmark Central - Ver. 3.11.4