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Difference between revisions of "intel/xeon e7/e7-4820"
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(→‎Cache)
(→‎Memory controller)
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== Memory controller ==
 
== Memory controller ==
−
{{integrated memory controller
+
{{memory controller
−
| type               = DDR3-800
+
|type=DDR3-1066
−
| type 2            = DDR3-978
+
|ecc=Yes
−
| type 3            = DDR3-1066
+
|max mem=2 TiB
−
| controllers       = 1
+
|controllers=1
−
| channels           = 4
+
|channels=4
−
| ecc support        = Yes
+
|max bandwidth=31.77 GiB/s
−
| max bandwidth     =  
+
|bandwidth schan=7.942 GiB/s
−
| bandwidth schan    =  
+
|bandwidth dchan=15.88 GiB/s
−
| bandwidth dchan    =  
+
|bandwidth tchan=23.83 GiB/s
−
| max memory        = 2048 GB
+
|bandwidth qchan=31.77 GiB/s
 +
|pae=44 bit
 
}}
 
}}
  

Revision as of 02:02, 2 December 2016

Template:mpu Xeon E7-4820 is a 64-bit octa-core x86 data center microprocessor that supports up to 4 sockets. This first generation Xeon E7 processor, Westmere-based, operates at a base frequency of 2 GHz with turob frequency of 2.266 GHz for 2 active cores. This chip has a TDP of 105 W, supporting up to 4 channels of DDR3 with support of up to 2 TB of memory.

Cache

Main article: Westmere § Cache

[Edit/Modify Cache Info]

hierarchy icon.svg
Cache Organization
Cache is a hardware component containing a relatively small and extremely fast memory designed to speed up the performance of a CPU by preparing ahead of time the data it needs to read from a relatively slower medium such as main memory.

The organization and amount of cache can have a large impact on the performance, power consumption, die size, and consequently cost of the IC.

Cache is specified by its size, number of sets, associativity, block size, sub-block size, and fetch and write-back policies.

Note: All units are in kibibytes and mebibytes.
L1$512 KiB
524,288 B
0.5 MiB
L1I$256 KiB
262,144 B
0.25 MiB
8x32 KiB4-way set associativewrite-back
L1D$256 KiB
262,144 B
0.25 MiB
8x32 KiB8-way set associativewrite-back
L2$2 MiB
2,048 KiB
2,097,152 B
0.00195 GiB
  8x256 KiB8-way set associativewrite-back
L3$18 MiB
18,432 KiB
18,874,368 B
0.0176 GiB
  8x2.25 MiB16-way set associativewrite-back

Graphics

This SoC has no integrated graphics processing unit.

Memory controller

[Edit/Modify Memory Info]

ram icons.svg
Integrated Memory Controller
Max TypeDDR3-1066
Supports ECCYes
Max Mem2 TiB
Controllers1
Channels4
Max Bandwidth31.77 GiB/s
32,532.48 MiB/s
34.113 GB/s
34,112.778 MB/s
0.031 TiB/s
0.0341 TB/s
Bandwidth
Single 7.942 GiB/s
Double 15.88 GiB/s
Triple 23.83 GiB/s
Quad 31.77 GiB/s
Physical Address (PAE)44 bit

Features

Template:mpu features

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Facts about "Xeon E7-4820 - Intel"
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has ecc memory supporttrue +
l1$ size512 KiB (524,288 B, 0.5 MiB) +
l1d$ description8-way set associative +
l1d$ size256 KiB (262,144 B, 0.25 MiB) +
l1i$ description4-way set associative +
l1i$ size256 KiB (262,144 B, 0.25 MiB) +
l2$ description8-way set associative +
l2$ size2 MiB (2,048 KiB, 2,097,152 B, 0.00195 GiB) +
l3$ description16-way set associative +
l3$ size18 MiB (18,432 KiB, 18,874,368 B, 0.0176 GiB) +
max memory bandwidth31.77 GiB/s (32,532.48 MiB/s, 34.113 GB/s, 34,112.778 MB/s, 0.031 TiB/s, 0.0341 TB/s) +
max memory channels4 +
supported memory typeDDR3-1066 +