Intel Core i7-2657M vs Intel Core i7-640M
Intel Core i7-2657M
Intel Core i7-640M
$346
|
2 Cores
4 Threads
1.6GHz Clock
|
2 Cores
4 Threads
2.8GHz Clock
|
|
Socket
BGA 1023
|
Socket
BGA 1288
|
|
iGPU
HD 3000 1000MHz
190 GFLOPS FP32
|
iGPU
HD 766MHz Gen 5
150 GFLOPS FP32
|
GB6 Single-Core
|
|
Core i7-2657M - GB6S 400
x1
Core i7-640M - GB6S 420
x1.05
GB6 Multi-Core
|
|
Core i7-2657M - GB6M 780
x1
Core i7-640M - GB6M 800
x1.03
|
|
Core i7-2657M - 21.3GB/s
x1.25
Core i7-640M - 17.1GB/s
x1
|
|
Core i7-2657M - 17W
x1
Core i7-640M - 35W
x2.06
|
|
Core i7-2657M - 190 GFLOPS FP32
x1.27
Core i7-640M - 150 GFLOPS FP32
x1
|
Manufacturer
Intel
|
Manufacturer
Intel
|
|
Architecture
Sandy Bridge
|
Architecture
Westmere
|
|
Family
Core 2nd Gen
|
Family
Core 1st Gen
|
|
Instruction Set (ISA)
x86-64
|
Instruction Set (ISA)
x86-64
|
|
Codename
Sandy Bridge
Sandy Bridge-H-2
Sandy Bridge-2C-GT2
|
Codename
Arrandale
-
-
|
|
Market Segment
Laptop
|
Market Segment
Laptop
|
|
Release Date
2/1/2011
|
Release Date
9/1/2010
|
|
Foundry
Intel
-
|
Foundry
Intel
Intel (iGPU Die)
|
|
Node
32nm
-
|
Node
32nm
45nm (iGPU Die)
|
|
Die Size
149 mm²
-
|
Die Size
81 mm²
114 mm² (iGPU Die)
|
|
Transistor Count
624 Million
-
|
Transistor Count
382 Million
177 Million (iGPU Die)
|
|
2 Cores
|
2 Cores
|
|
4 Threads
|
4 Threads
|
|
1.6GHz
2.7GHz Boost
-
|
2.8GHz
3.46GHz Boost
21x Multiplier
|
|
Overclocking
Locked
-
-
-
|
Overclocking
Locked
Voltage
0.78V Min
1.4V Max
|
|
Type
DMI
|
Type
DMI
|
|
Transfer Rate
5GT/s
|
Transfer Rate
2.5GT/s
|
|
Lanes
4
|
Lanes
4
|
|
Bandwidth
2.5GB/s
|
Bandwidth
1.25GB/s
|
|
Bi-directional
5GB/s
|
Bi-directional
2.5GB/s
|
|
L0 Instruction
|
L0 Instruction
|
|
L0 Data
|
L0 Data
|
|
L1 Instruction
32KB/Core
8-way set associative
|
L1 Instruction
32KB/Core
4-way set associative
|
|
L1 Data
32KB/Core
8-way set associative
|
L1 Data
32KB/Core
8-way set associative
|
|
L2
256KB/Core
8-way set associative
|
L2
256KB/Core
8-way set associative
|
|
L3
4MB Shared
16-way set associative
|
L3
4MB Shared
16-way set associative
|
|
Channels
2
|
Channels
2
|
|
Max Memory
8GB
|
Max Memory
8GB
|
|
ECC
Not Supported
|
ECC
Not Supported
|
|
Bus Width/Channel
64Bit
Bus Width
128Bit
|
Bus Width/Channel
64Bit
Bus Width
128Bit
|
|
Clock
667MHz
Transfer Rate
1333MT/s
|
Clock
533MHz
Transfer Rate
1066MT/s
|
|
Bandwidth/Channel
10.7GB/s
Bandwidth
21.3GB/s
|
Bandwidth/Channel
8.5GB/s
Bandwidth
17.1GB/s
|
|
TDP
17W
|
TDP
35W
|
|
Temp
100°C Max
|
Temp
105°C Max
|
|
Included Cooler
|
Included Cooler
|
|
PCIe 2.0 x16 Lanes
|
PCIe 2.0 x16 Lanes
|
|
HD 3000 1000MHz
96 Shaders
1000MHz
190 GFLOPS FP32
|
HD 766MHz Gen 5
96 Shaders
766MHz
150 GFLOPS FP32
|
|
No NPU
|
No NPU
|
|
No Cellular
|
No Cellular
|
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