Intel 2x Xeon E5645 vs Intel 2x Xeon E5520
Intel 2x Xeon E5645
$551
Intel 2x Xeon E5520
$373
|
12 Cores
24 Threads
2.4GHz Clock
|
8 Cores
16 Threads
2.26GHz Clock
|
|
Socket
LGA 1366
|
Socket
LGA 1366
|
|
iGPU
No GPU
- -
|
iGPU
No GPU
- -
|
|
GB6S 365
9%
|
GB6S 365
9%
|
|
GB6M 3,545
13%
|
GB6M 2,285
9%
|
|
CB23S N/A
0%
|
CB23S N/A
0%
|
|
CB23M N/A
0%
|
CB23M N/A
0%
|
|
Manufacturer
Intel
|
Manufacturer
Intel
|
|
Architecture
Westmere
|
Architecture
Nehalem
|
|
Family
Xeon
|
Family
Xeon
|
|
Instruction Set (ISA)
x86-64
|
Instruction Set (ISA)
x86-64
|
|
Codename
Westmere-EP
-
-
-
-
-
-
-
-
|
Codename
Nehalem-EP
-
-
-
Gainestown
-
-
-
-
|
|
Market Segment
Server
|
Market Segment
Server
|
|
Release Date
3/16/2010
|
Release Date
3/30/2009
|
|
Foundry
Intel
-
-
-
|
Foundry
Intel
-
-
-
|
|
Node
32nm
-
-
-
|
Node
45nm
-
-
-
|
|
Die Size
240 mm²
-
-
-
|
Die Size
263 mm²
-
-
-
|
|
Transistor Count
1.2 Billion
-
-
-
|
Transistor Count
731 Million
-
-
-
|
|
12 Cores
-
-
-
|
8 Cores
-
-
-
|
|
24 Threads
-
-
-
|
16 Threads
-
-
-
|
|
-
2.4GHz
2.6GHz Boost
18x Multiplier
|
-
2.26GHz
2.46GHz Boost
17x Multiplier
|
|
-
-
-
|
-
-
-
|
|
-
-
-
|
-
-
-
|
|
Overclocking
Locked
Voltage
0.75V Min
1.35V Max
|
Overclocking
Locked
Voltage
0.75V Min
1.35V Max
|
|
Type
QPI
|
Type
QPI
|
|
Clock
2930MHz
|
Clock
2930MHz
|
|
Data Rate
Double
|
Data Rate
Double
|
|
Transfer Rate
5.9GT/s
|
Transfer Rate
5.9GT/s
|
|
Width
16Bit
|
Width
16Bit
|
|
-
-
|
-
-
|
|
Bandwidth
11.72GB/s
|
Bandwidth
11.72GB/s
|
|
Bi-directional
23.44GB/s
|
Bi-directional
23.44GB/s
|
|
L0 Instruction
-
-
|
L0 Instruction
-
-
|
|
L0 Data
-
-
|
L0 Data
-
-
|
|
L1 Instruction
32KB/Core
4-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
-
12MB Shared
-
16-way set associative
-
-
-
-
-
|
L3
-
8MB Shared
-
16-way set associative
-
-
-
-
-
|
|
-
-
-
-
|
-
-
-
-
|
|
Channels
3
|
Channels
3
|
|
Max Memory
288GB
|
Max Memory
144GB
|
|
ECC
Supported
|
ECC
Supported
|
|
Bus Width/Channel
64Bit
Bus Width
192Bit
|
Bus Width/Channel
64Bit
Bus Width
192Bit
|
|
Clock
667MHz
Transfer Rate
1333MT/s
|
Clock
533MHz
Transfer Rate
1066MT/s
|
|
Bandwidth/Channel
10.7GB/s
Bandwidth
32.0GB/s
|
Bandwidth/Channel
8.5GB/s
Bandwidth
25.6GB/s
|
|
TDP
80W
-
-
-
|
TDP
80W
-
-
-
|
|
Temp
-
76°C TCase
|
Temp
-
72°C TCase
|
|
Included Cooler
Not Included
|
Included Cooler
Not Included
|
|
No PCIe
|
No PCIe
|
|
No GPU
-
-
- -
|
No GPU
-
-
- -
|
|
No NPU
-
|
No NPU
-
|
|
-
-
|
-
-
|
|
-
|
-
|
|
-
-
|
-
-
|
|
No Cellular
|
No Cellular
|
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