我有一個 A3+ 插槽主機板（技嘉 ATX GA990ZA-UD3-R5），配有 AMD FX-8320E CPU 和兩個 8Gb 記憶體條（相同，作為套件一起購買）。我按照手冊上的說明安裝了內存以使用雙通道內存，但據我所知，我無法查詢系統有關內存的信息（使用Linux）：
lshw什麼也沒說：
$ sudo lshw -C memory
*-memory
description: System memory
physical id: 0
size: 15GiB
並dmidecode沒有提到交錯：
$ 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
（記憶體條的速度為 1866MHz，我不知道為什麼它在 .BIOS 中顯示為 933MHz。BIOSdmidecode將其報告為 1866MHz。）
此主機板不顯示 POST 訊息。它會顯示一個啟動螢幕，然後提示進入設定。之後，它不會列印任何內容，直到引導程式介入。
我不確定這是否相關，但我有 IOMMU已啟用在 BIOS 中，我在啟動時將選項傳遞iommu=soft給 Linux 核心。
我如何確定我是否有雙通道工作，以及為什麼lshw沒有dmidecode通知雙通道？
答案1
嘗試這個：
dmidecode -t 17 |grep 通道
對於雙通道，您應該將通道 A/B 視為：
Locator: ChannelA-DIMM0
Locator: ChannelA-DIMM1
Locator: ChannelB-DIMM0
Locator: ChannelB-DIMM1
答案2
我們在很多地方看到了很多回复，因為我們有同樣的問題。關於 dmidecode 輸出存在一些爭論，就好像它顯示了位置，但沒有說明特定插槽正在使用組合頻寬。
如果您確實使用與雙通道配置不相容的記憶體條填充主機板，它仍會顯示相同的定位器，但不會合併頻寬。
對於 Windows，許多應用程式會顯示它是否處於雙通道、三通道或四通道模式；而對於 linux，我們很難找到。
另一方面，老式且非常有效的 memtest86+ 將顯示記憶體存取頻寬 - 分別為單通道、雙通道、三通道和四通道的 64、128、196、256 位元。
在下圖中，我們有一個支援三通道的主機板，它在三通道模式下運作。
