我最近买了一台（免费）电脑显示器，想试着把它连接起来。我的电脑似乎检测到了第 4 台显示器，但似乎最多只能连接 3 台。最初我以为是我的电缆或 DispayPort 转 HDMI 适配器坏了，但事实似乎并非如此，因为我现在通过适配器将新显示器与已知可以正常工作的 HDMI 电缆连接起来。现在我原来可以正常工作的显示器无法通过显卡的内置 HDMI 端口打开。不确定这里到底发生了什么。
有趣的是，PC 似乎检测到所有 4 个显示器的存在（每当我插入第 4 个显示器时都会听到铃声 - HDMI 或 DisplayPort，无论第 4 个显示器是什么，都会听到铃声），如显示设置面板所示，但它只在其中 3 个上显示。
以下是根据 AMD Raedon 设置面板得出的我的系统规格：
Graphics Card Manufacturer - Powered by AMD
Graphics Chipset - AMD Radeon (TM) R7 360 Series
Device ID - 665F
Vendor ID - 1002
SubSystem ID - 22B9
SubSystem Vendor ID - 1458
Revision ID - 81
Bus Type - PCI Express 3.0
Current Bus Settings - PCI Express 3.0 x16
BIOS Version - 015.049.000.002
BIOS Part Number - xxx-xxx-xxx
BIOS Date - 2015/06/14 23:24
Memory Size - 2048 MB
Memory Type - GDDR5
Memory Clock - 1625 MHz
Core Clock - 1200 MHz
Total Memory Bandwidth - 104 GByte/s
Memory Bit Rate - 6.50 Gbps
2D Driver File Path - /REGISTRY/MACHINE/SYSTEM/ControlSet001/Control/Class/{4d36e968-e325-11ce-bfc1-08002be10318}/0000
Radeon Settings Version - 2017.0922.1659.28737
Driver Packaging Version - 17.30.1091.1011-170922a-318486C
Provider - Advanced Micro Devices, Inc.
2D Driver Version - 8.1.1.1614
Direct3D® Version - 9.14.10.01304
OpenGL® Version - 6.14.10.13492
OpenCL™ Version - 22.19.677.257
AMD Mantle Version - 9.1.10.0220
AMD Mantle API Version - 102400
AMD Audio Driver Version - 10.0.1.5
Vulkan™ Driver Version - 1.6.0
Vulkan™ API Version - 1.0.51
Radeon Software Version - 17.7
Radeon Software Edition - Crimson ReLive
Graphics Chipset - AMD Radeon (TM) R7 360 Series
Memory Size - 2048 MB
Memory Type - GDDR5
Core Clock - 1200 MHz
Windows Version - Windows 10 (64 bit)
System Memory - 16 GB
CPU Type - Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz
以下是我的系统规格（由 Speccy（优秀的程序）报告）：
Operating System
Windows 10 Home 64-bit
CPU
Intel Core i7 4770 @ 3.40GHz 43 °C
Haswell 22nm Technology
RAM
16.0GB Dual-Channel DDR3 @ 804MHz (11-11-11-28)
Motherboard
Hewlett-Packard 2AF7 (SOCKET 0) 43 °C
Graphics
HP w2338h (1920x1080@59Hz)
DELL 1908FP (1280x1024@60Hz)
DELL 1704FPV (1280x1024@60Hz)
2048MB ATI AMD Radeon R7 360 Series (Gigabyte) 47 °C
Storage
1863GB Seagate ST2000DM001-1CH164 (SATA) 37 °C
3726GB Seagate Backup+ Desk SCSI Disk Device (USB (SATA)) 48 °C
14GB Generic Flash Disk USB Device (USB)
Optical Drives
hp DVD-RAM SW820
Audio
AMD High Definition Audio Device
CPU
Intel Core i7 4770
Cores 4
Threads 8
Name Intel Core i7 4770
Code Name Haswell
Package Socket 1150 LGA
Technology 22nm
Specification Intel Core i7-4770 CPU @ 3.40GHz
Family 6
Extended Family 6
Model C
Extended Model 3C
Stepping 3
Revision C0
Instructions MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, Intel 64, NX, VMX, AES, AVX, AVX2, FMA3
Virtualization Supported, Disabled
Hyperthreading Supported, Enabled
Fan Speed 1169 RPM
Bus Speed 99.9 MHz
Stock Core Speed 3400 MHz
Stock Bus Speed 100 MHz
Average Temperature 42 °C
Caches
L1 Data Cache Size 4 x 32 KBytes
L1 Instructions Cache Size 4 x 32 KBytes
L2 Unified Cache Size 4 x 256 KBytes
L3 Unified Cache Size 8192 KBytes
Cores
Core Speed Multiplier Bus Speed Temperature Threads
Core 0 3896.3 MHz x 39.0 99.9 MHz 41 °C APIC ID: 0, 1
Core 1 3796.4 MHz x 38.0 99.9 MHz 41 °C APIC ID: 2, 3
Core 2 3896.3 MHz x 39.0 99.9 MHz 44 °C APIC ID: 4, 5
Core 3 3896.3 MHz x 39.0 99.9 MHz 43 °C APIC ID: 6, 7
Operating System
Windows 10 Home 64-bit
Computer type: Tablet
Installation Date: 2/10/2018 8:52:10 PM
Serial Number: T49TD-6VFBW-VV7HY-B2PXY-MY47H
Windows Security Center
Firewall Enabled
Windows Update
AutoUpdate Not configured
Windows Defender
Windows Defender Disabled
Antivirus
Webroot SecureAnywhere
Antivirus Enabled
Company Name Webroot
Product Version 9.0.20.31
Virus Signature Database Up to date
Windows Defender
Antivirus Disabled
Virus Signature Database Up to date
.NET Frameworks installed
v4.7 Full
v4.7 Client
v3.5 SP1
v3.0 SP2
v2.0 SP2
Internet Explorer
Version 11.431.16299.0
PowerShell
Version 5.1.16299.15
Java
Java Runtime Environment
Path C:\Program Files (x86)\Java\jdk1.8.0_161\bin\java.exe
Version 8.0
Update 161
Build 12
Java Runtime Environment
Path C:\Program Files\Java\jdk1.8.0_161\bin\java.exe
Version 8.0
Update 161
Build 12
Environment Variables
USERPROFILE C:\Users\misc
SystemRoot C:\WINDOWS
User Variables
Machine Variables
Power Profile
Active power scheme High performance
Hibernation Enabled
Turn Off Monitor after: (On AC Power) 15 min
Turn Off Hard Disk after: (On AC Power) 20 min
Suspend after: (On AC Power) Never
Screen saver Disabled
Uptime
Current Session
Current Time 6/2/2018 1:10:09 PM
Current Uptime 188,031 sec (2 d, 04 h, 13 m, 51 s)
Last Boot Time 5/31/2018 8:56:18 AM
Services
TimeZone
TimeZone GMT -5:00 Hours
Language English (United States)
Location United States
Format English (United States)
Currency $
Date Format M/d/yyyy
Time Format h:mm:ss tt
Scheduler
6/2/2018 1:02 PM; GoogleUpdateTaskMachineUA
6/2/2018 1:12 PM; Adobe Flash Player Updater
6/2/2018 1:13 PM; Adobe Flash Player PPAPI Notifier
6/2/2018 3:02 PM; GoogleUpdateTaskMachineCore
6/2/2018 7:54 PM; AutoKMS
6/3/2018 6:10 AM; Opera scheduled Autoupdate 1518009744
6/3/2018 2:06 PM; OneDrive Standalone Update Task-S-1-5-21-515206214-2944248679-1480767375-1001
6/5/2018 7:35 AM; HPCeeScheduleFormisc
CCleanerSkipUAC
Durée de vie
StartCN
Hotfixes
System Folders
Process List
Security Options
Device Tree
Motherboard
Manufacturer Hewlett-Packard
Model 2AF7 (SOCKET 0)
Version 1.04
Chipset Vendor Intel
Chipset Model Haswell
Chipset Revision 06
Southbridge Vendor Intel
Southbridge Model H87
Southbridge Revision C1
System Temperature 42 °C
BIOS
Brand AMI
Version 80.21
Date 8/13/2015
Voltage
+3.3V 3.296 V
CPU CORE 1.744 V
VIN2 2.064 V
VIN3 2.152 V
VSB3V 3.312 V
CMOS BATTERY 3.248 V
PCI Data
Slot PCI
Slot Type PCI
Slot Usage In Use
Data lanes x16
Slot Designation PCI Express x16 Slot
Characteristics 3.3V, Shared, PME
Slot Number 0
Slot PCI
Slot Type PCI
Slot Usage Available
Data lanes x1
Slot Designation PCI Express x1 Slot 1
Characteristics 3.3V, Shared, PME
Slot Number 1
Slot PCI
Slot Type PCI
Slot Usage Available
Data lanes x1
Slot Designation PCI Express x1 Slot 2
Characteristics 3.3V, Shared, PME
Slot Number 2
Slot PCI
Slot Type PCI
Slot Usage Available
Data lanes x1
Slot Designation PCI Express x1 Slot 3
Characteristics 3.3V, Shared, PME
Slot Number 3
Slot PCI-E
Slot Type PCI-E
Slot Usage In Use
Data lanes x1
Slot Designation Mini Card Slot 1
Characteristics 3.3V, Shared, PME
Slot Number 4
Graphics
Monitor 1
Name HP w2338h on AMD Radeon R7 360 Series
Current Resolution 1920x1080 pixels
Work Resolution 1920x1040 pixels
State Enabled, Unsafe
Multiple displays Extended, Secondary, Enabled
Monitor Width 1920
Monitor Height 1080
Monitor BPP 32 bits per pixel
Monitor Frequency 59 Hz
Device \\.\DISPLAY1\Monitor0
Monitor 2
Name DELL 1908FP on AMD Radeon R7 360 Series
Current Resolution 1280x1024 pixels
Work Resolution 1280x984 pixels
State Enabled, Output devices support, Unsafe
Multiple displays Extended, Primary, Enabled
Monitor Width 1280
Monitor Height 1024
Monitor BPP 32 bits per pixel
Monitor Frequency 60 Hz
Device \\.\DISPLAY2\Monitor0
Monitor 3
Name DELL 1704FPV on AMD Radeon R7 360 Series
Current Resolution 1280x1024 pixels
Work Resolution 1280x984 pixels
State Enabled, Output devices support, Unsafe
Multiple displays Extended, Secondary, Enabled
Monitor Width 1280
Monitor Height 1024
Monitor BPP 32 bits per pixel
Monitor Frequency 60 Hz
Device \\.\DISPLAY3\Monitor0
ATI AMD Radeon (TM) R7 360 Series
Manufacturer ATI
Model AMD Radeon R7 360 Series
Device ID 1002-665F
Revision 82
Subvendor Gigabyte (1458)
Current Performance Level Level 0
Current GPU Clock 300 MHz
Current Memory Clock 1625 MHz
Current Shader Clock 1625 MHz
Voltage 0.001 V
GPU Clock 1200.0 MHz
Temperature 47 °C
Core Voltage 0.001 V
Driver version 22.19.677.257
BIOS Version xxx-xxx-xxx
Memory Type GDDR5
Memory 2048 MB
Bandwidth 104.0 GB/s
Count of performance levels : 2
Level 1 - "Perf Level 0"
Level 2 - "Perf Level 1"
答案1
您的 GPU 最多只能支持两个被动显示连接 (HDMI/DVI/VGA)。第三个及以后的显示器需要使用原生 DisplayPort 连接，或通过主动适配器连接。
根据这个 AMD 文章 对于 4 台显示器，唯一的选择是：
使用 DisplayPort菊花链。
由于您的显示器本身不支持 DisplayPort，这可能不是适合您的解决方案。使用 MST 集线器您最多可以连接 6 台显示器。
MST 集线器似乎是您的最佳选择。有关其功能的解释，请参阅文章
DisplayPort MST 集线器 [终于解释清楚了！]。
不幸的是，大多数支持 4 个端口的集线器都非常昂贵，大约 100 美元。它们通常只能将一个 DisplayPort 1.2 拆分为多个 DisplayPort 端口，因此在您的情况下还需要使用适当的 HDMI/DVI 转换器。
为了节省成本，您可以像现在一样将第一和第二台显示器放在 DVI 或 HDMI 上，同时将第三和第四台显示器放在 DisplayPort 上。这样，您可以使用更便宜的 1 对 2 MST 集线器，如果需要，最多可以使用两个 HDMI/DVI 适配器。但最好从退货政策良好的商店购买此 MST 集线器和适配器，以防此设置不起作用。