我有一块插槽 A3+ 主板（Gigabyte ATX GA990ZA-UD3-R5），配有 AMD FX-8320E CPU 和两根 8Gb 内存条（相同，作为套件一起购买）。我按照手册上的说明安装了内存，以便使用双通道内存，但据我所知，我无法向系统查询有关内存的信息（使用 Linux）：
lshw什么也没说：
$ sudo lshw -C memory
*-memory
description: System memory
physical id: 0
size: 15GiB
并dmidecode没有提到交错：
$ sudo dmidecode --type memory
# dmidecode 3.0
Getting SMBIOS data from sysfs.
SMBIOS 2.7 present.
Handle 0x0008, DMI type 5, 24 bytes
Memory Controller Information
Error Detecting Method: 64-bit ECC
Error Correcting Capabilities:
None
Supported Interleave: One-way Interleave
Current Interleave: One-way Interleave
Maximum Memory Module Size: 2048 MB
Maximum Total Memory Size: 8192 MB
Supported Speeds:
70 ns
60 ns
Supported Memory Types:
DIMM
SDRAM
Memory Module Voltage: 3.3 V
Associated Memory Slots: 4
0x0009
0x000A
0x000B
0x000C
Enabled Error Correcting Capabilities:
None
Handle 0x0009, DMI type 6, 12 bytes
Memory Module Information
Socket Designation: DIMM0
Bank Connections: 0 1
Current Speed: 60 ns
Type: DIMM SDRAM
Installed Size: 536870912 MB (Single-bank Connection)
Enabled Size: 536870912 MB (Single-bank Connection)
Error Status: OK
Handle 0x000A, DMI type 6, 12 bytes
Memory Module Information
Socket Designation: DIMM1
Bank Connections: 2 3
Current Speed: 60 ns
Type: DIMM SDRAM
Installed Size: 536870912 MB (Single-bank Connection)
Enabled Size: 536870912 MB (Single-bank Connection)
Error Status: OK
Handle 0x000B, DMI type 6, 12 bytes
Memory Module Information
Socket Designation: DIMM2
Bank Connections: 4 5
Current Speed: 60 ns
Type: DIMM SDRAM
Installed Size: 536870912 MB (Single-bank Connection)
Enabled Size: 536870912 MB (Single-bank Connection)
Error Status: OK
Handle 0x000C, DMI type 6, 12 bytes
Memory Module Information
Socket Designation: DIMM3
Bank Connections: 6 7
Current Speed: 60 ns
Type: DIMM SDRAM
Installed Size: 536870912 MB (Single-bank Connection)
Enabled Size: 536870912 MB (Single-bank Connection)
Error Status: OK
Handle 0x002C, DMI type 16, 23 bytes
Physical Memory Array
Location: System Board Or Motherboard
Use: System Memory
Error Correction Type: None
Maximum Capacity: 32 GB
Error Information Handle: Not Provided
Number Of Devices: 4
Handle 0x002E, DMI type 17, 34 bytes
Memory Device
Array Handle: 0x002C
Error Information Handle: Not Provided
Total Width: Unknown
Data Width: 64 bits
Size: No Module Installed
Form Factor: DIMM
Set: None
Locator: Node0_Dimm0
Bank Locator: Node0_Bank0
Type: Unknown
Type Detail: Synchronous
Speed: Unknown
Manufacturer: Dimm0_Manufacturer
Serial Number: Dimm0_SerNum
Asset Tag: Dimm0_AssetTag
Part Number: Dimm0_PartNum
Rank: Unknown
Configured Clock Speed: Unknown
Handle 0x0030, DMI type 17, 34 bytes
Memory Device
Array Handle: 0x002C
Error Information Handle: Not Provided
Total Width: 64 bits
Data Width: 64 bits
Size: 8192 MB
Form Factor: DIMM
Set: None
Locator: Node0_Dimm1
Bank Locator: Node0_Bank0
Type: DDR3
Type Detail: Synchronous Unbuffered (Unregistered)
Speed: 933 MHz
Manufacturer: Kingston
Serial Number: 4D384FFC
Asset Tag: Dimm1_AssetTag
Part Number: KHX1866C10D3/
Rank: 2
Configured Clock Speed: 933 MHz
Handle 0x0032, DMI type 17, 34 bytes
Memory Device
Array Handle: 0x002C
Error Information Handle: Not Provided
Total Width: Unknown
Data Width: 64 bits
Size: No Module Installed
Form Factor: DIMM
Set: None
Locator: Node0_Dimm2
Bank Locator: Node0_Bank0
Type: Unknown
Type Detail: Synchronous
Speed: Unknown
Manufacturer: Dimm2_Manufacturer
Serial Number: Dimm2_SerNum
Asset Tag: Dimm2_AssetTag
Part Number: Dimm2_PartNum
Rank: Unknown
Configured Clock Speed: Unknown
Handle 0x0034, DMI type 17, 34 bytes
Memory Device
Array Handle: 0x002C
Error Information Handle: Not Provided
Total Width: 64 bits
Data Width: 64 bits
Size: 8192 MB
Form Factor: DIMM
Set: None
Locator: Node0_Dimm3
Bank Locator: Node0_Bank0
Type: DDR3
Type Detail: Synchronous Unbuffered (Unregistered)
Speed: 933 MHz
Manufacturer: Kingston
Serial Number: 6B39AD31
Asset Tag: Dimm3_AssetTag
Part Number: KHX1866C10D3/
Rank: 2
Configured Clock Speed: 933 MHz
（内存条的速度为 1866MHz，我不确定为什么它显示为 933MHz。BIOSdmidecode将其报告为 1866MHz。）
此主板不显示 POST 消息。它显示启动画面，然后提示进入设置。之后，它什么都不打印，直到引导加载程序介入。我搜索了所有设置选项，也没有看到任何与双通道是否激活相关的信息。
我不确定这是否相关，但我有 IOMMU已启用在 BIOS 中，我在启动时将选项传递iommu=soft给 Linux 内核。
我如何确定双通道是否正常工作？另外，为什么lshw不dmidecode告知双通道？
答案1
尝试这个：
dmidecode -t 17 |grep 频道
对于双通道，您应该看到通道 A/B 如下：
Locator: ChannelA-DIMM0
Locator: ChannelA-DIMM1
Locator: ChannelB-DIMM0
Locator: ChannelB-DIMM1
答案2
我们看到很多回复，因为我们有相同的问题，所以在很多地方都有回复。关于 dmidecode 输出有一些争议，好像它显示了位置，但没有说明特定插槽是否在使用组合带宽。
如果您在主板上安装了与双通道配置不兼容的内存条，它仍会显示相同的定位器，但不会组合带宽。
对于 Windows，许多应用程序显示它是否处于双通道、三通道或四通道模式；而对于 Linux，我们很难找到任何模式。
另一方面，老式但非常有效的 memtest86+ 将显示内存访问带宽 - 分别为单通道、双通道、三通道和四通道 64、128、196、256 位。
在下图中，我们有一块具有三通道功能的主板，它以三通道模式运行。
