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Core i7-640LM vs Pentium G850


Description
The i7-640LM is based on Westmere architecture while the G850 is based on Sandy Bridge.

Using the multithread performance as a reference, the i7-640LM gets a score of 31.7 k points while the G850 gets 40.5 k points.

Summarizing, the G850 is 1.3 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
206a7
Core
Calpella
Sandy Bridge
Architecture
Base frecuency
2.133 GHz
2.9 GHz
Boost frecuency
2.667 GHz
2.9 GHz
Socket
BGA1288
LGA 1155
Cores/Threads
2/4
2/2
TDP
25 W
65 W
Cache L1 (d+i)
2x32+2x32 kB
32+32 kB
Cache L2
2x256 kB
256 kB
Cache L3
4096 kB
3072 kB
Date
January 2010
May 2012
Mean monothread perf.
16.35k points
21.85k points
Mean multithread perf.
31.74k points
40.5k 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
G850
Test#1 (Integers)
7.01k
8.77k (x1.25)
Test#2 (FP)
4.58k
7.08k (x1.54)
Test#3 (Generic, ZIP)
2.73k
3.72k (x1.36)
Test#1 (Memory)
2.03k
2.28k (x1.12)
TOTAL
16.35k
21.85k (x1.34)

Multithread

i7-640LM

G850
Test#1 (Integers)
12.93k
17.5k (x1.35)
Test#2 (FP)
10.21k
13.48k (x1.32)
Test#3 (Generic, ZIP)
6.22k
7.32k (x1.18)
Test#1 (Memory)
2.37k
2.19k (x0.93)
TOTAL
31.74k
40.5k (x1.28)

Performance/W
i7-640LM
G850
Test#1 (Integers)
517 points/W
269 points/W
Test#2 (FP)
409 points/W
207 points/W
Test#3 (Generic, ZIP)
249 points/W
113 points/W
Test#1 (Memory)
95 points/W
34 points/W
TOTAL
1269 points/W
623 points/W

Performance/GHz
i7-640LM
G850
Test#1 (Integers)
2627 points/GHz
3025 points/GHz
Test#2 (FP)
1718 points/GHz
2440 points/GHz
Test#3 (Generic, ZIP)
1024 points/GHz
1283 points/GHz
Test#1 (Memory)
762 points/GHz
787 points/GHz
TOTAL
6130 points/GHz
7534 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