Dell Inspiron 3891 Operation and maintenance manual

Inspiron 3891
Setup and Specifications
Regulatory Model: D29M
Regulatory Type: D29M004
April 2021
Rev. A01

Notes, cautions, and warnings
NOTE: A NOTE indicates important information that helps you make better use of your product.
CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid
the problem.
WARNING: A WARNING indicates a potential for property damage, personal injury, or death.
© 2021 Dell Inc. or its subsidiaries. All rights reserved. Dell, EMC, and other trademarks are trademarks of Dell Inc. or its subsidiaries. Other
trademarks may be trademarks of their respective owners.

Chapter 1: Set up your computer................................................................................................... 4
Chapter 2: Views of Inspiron 3891................................................................................................. 9
Front....................................................................................................................................................................................... 9
Back....................................................................................................................................................................................... 11
Back panel............................................................................................................................................................................12
Chapter 3: Specifications of Inspiron 3891................................................................................... 13
Dimensions and weight..................................................................................................................................................... 13
Processors........................................................................................................................................................................... 13
Chipset..................................................................................................................................................................................14
Operating system............................................................................................................................................................... 14
Memory.................................................................................................................................................................................14
External ports..................................................................................................................................................................... 15
Internal slots........................................................................................................................................................................16
Ethernet............................................................................................................................................................................... 16
Wireless module..................................................................................................................................................................16
Audio......................................................................................................................................................................................17
Storage................................................................................................................................................................................. 17
Media-card reader..............................................................................................................................................................17
Power supply.......................................................................................................................................................................18
GPU—Integrated............................................................................................................................................................... 18
GPU—Discrete...................................................................................................................................................................18
Operating and storage environment..............................................................................................................................19
Chapter 4: Getting help and contacting Dell................................................................................ 20
Contents
Contents 3

Set up your computer
1. Connect the keyboard and mouse.
2. Connect to your network using a cable, or connect to a wireless network.
1
4 Set up your computer

3. Connect the display.
NOTE: If you ordered your computer with a discrete graphics card, the HDMI and VGA ports on the back panel of your
computer may be covered. Connect the display to the discrete graphics card.
4. Connect the power cable.
Set up your computer 5

5. Press the power button.
6Set up your computer

6. Finish operating system setup.
For Ubuntu:
Follow the on-screen instructions to complete the setup. For more information about installing and configuring Ubuntu, see
the knowledge base articles SLN151664 and SLN151748 at www.dell.com/support.
For Windows:
Follow the on-screen instructions to complete the setup. When setting up, Dell recommends that you:
●Connect to a network for Windows updates.
NOTE: If connecting to a secured wireless network, enter the password for the wireless network access when
prompted.
●If connected to the internet, sign-in with or create a Microsoft account. If not connected to the internet, create an
offline account.
●On the Support and Protection screen, enter your contact details.
7. Locate and use Dell apps from the Windows Start menu—Recommended
Table 1. Locate Dell apps
Resources Description
My Dell
Centralized location for key Dell applications, help articles, and other important information about
your computer. It also notifies you about the warranty status, recommended accessories, and
software updates if available.
Set up your computer 7

Table 1. Locate Dell apps
Resources Description
SupportAssist
Pro-actively checks the health of your computer’s hardware and software. The SupportAssist
OS Recovery tool troubleshoots issues with the operating system. For more information, see the
SupportAssist documentation at www.dell.com/support.
NOTE: In SupportAssist, click the warranty expiry date to renew or upgrade your warranty.
Dell Update
Updates your computer with critical fixes and latest device drivers as they become available.
For more information about using Dell Update, see the knowledge base article SLN305843 at
www.dell.com/support.
Dell Digital Delivery
Download software applications, which are purchased but not pre-installed on your computer.
For more information about using Dell Digital Delivery, see the knowledge base article 153764 at
www.dell.com/support.
8 Set up your computer

Views of Inspiron 3891
Front
1. Optical-drive activity light
The Optical-drive activity light turns on when the computer reads from or writes to an optical drive.
2. Optical-drive eject button
Press to open the optical drive tray.
3. Optical-drive emergency eject pinhole
Used to eject the optical-drive tray manually if the optical-drive eject button fails.
NOTE: For more information about manually ejecting optical-drive trays, see the knowledge base article SLN301118 at
www.dell.com/support.
4. Optical drive (optional)
2
Views of Inspiron 3891 9

An optical drive reads from and writes to CDs and DVDs.
5. Power button
Press to turn on the computer if it is turned off, in sleep state, or in hibernate state.
When the computer is turned on, press the power button to put the computer into sleep state; press and hold the power
button for 10 seconds to force shut-down the computer.
NOTE: You can customize the power-button behavior in Windows. For more information, see Me and My Dell at
www.dell.com/support/manuals.
6. SD-card slot (optional)
Reads from and writes to the SD card. The computer supports the following card types:
●Secure Digital (SD)
●Secure Digital High Capacity (SDHC)
●Secure Digital Extended Capacity (SDXC)
7. Global headset jack
Connect headphones or a headset (headphone and microphone combo).
8. USB 2.0 ports (2)
Connect devices such as external storage devices and printers. Provides data transfer speeds up to 480 Mbps.
9. USB 3.2 Gen 1 (Type-C) port
Connect to external storage devices. Provides data transfer speeds up to 5 Gbps.
NOTE: This port does not support video/audio streaming.
10. USB 3.2 Gen 1 port
Connect devices such as external storage devices and printers. Provides data transfer speeds up to 5 Gbps.
10 Views of Inspiron 3891

Back
1. Back panel
Connect USB, audio, video, and other devices.
2. Expansion-card slots
Provide access to ports on any installed PCI Express cards.
3. Power port
Connect a power cable to provide power to your computer.
4. Power-supply diagnostics light
Indicates the power-supply state.
5. Security-cable slot (for Kensington locks)
Connect a security cable to prevent unauthorized movement of your computer.
6. Padlock rings
Attach a standard padlock to prevent unauthorized access to the interior of your computer.
Views of Inspiron 3891 11

Back panel
1. Line-out port
Connect speakers.
2. HDMI 1.4b port
Connect to a TV or another HDMI-in enabled device. Provides video and audio output.
NOTE: This port is covered by mylar for computers shipped with 11th Generation Intel Core i5-11400F and 11th
Generation Intel Core i7-11700F processors.
3. VGA port
Connect an external display or a projector.
NOTE: This port is covered for computers shipped with 11th Generation Intel Core i5-11400F and 11th Generation Intel
Core i7-11700F processors.
4. USB 3.2 Gen 1 ports (2)
Connect devices such as external storage devices and printers. Provides data transfer speeds up to 5 Gbps.
5. USB 2.0 ports (2)
Connect devices such as external storage devices and printers. Provides data transfer speeds up to 480 Mbps.
6. Network port
Connect an Ethernet (RJ45) cable from a router or a broadband modem for network or Internet access.
12 Views of Inspiron 3891

Specifications of Inspiron 3891
Dimensions and weight
The following table lists the height, width, depth, and weight of your Inspiron 3891.
Table 2. Dimensions and weight
Description Values
Height:
Front height 324.30 mm (12.77 in.)
Rear height 324.30 mm (12.77 in.)
Width 154 mm (6.06 in.)
Depth 293 mm (11.54 in.)
Weight
NOTE: The weight of your computer depends on the
configuration ordered and manufacturing variability.
7.02 kg (15.47 lb)
Processors
The following table lists the details of the processors supported by your Inspiron 3891.
Table 3. Processors
Processors Wattage Core count Thread count Speed Cache
10th Generation
Intel Core i3-10105
65 W 4 8 Up to 4.4 GHz 6 MB
10th Generation
Intel Core i5-10400
65 W 6 12 Up to 4.3 GHz 12 MB
10th Generation
Intel Core
i5-10400F
65 W 6 12 Up to 4.3 GHz 12 MB
10th Generation
Intel Core i5-10700
65 W 8 16 Up to 4.8 GHz 16 MB
10th Generation
Intel Core
i5-10700F
65 W 8 16 Up to 4.8 GHz 16 MB
11th Generation
Intel Core i5-11400
65 W 6 12 Up to 4.4 GHz 12 MB
3
Specifications of Inspiron 3891 13

Table 3. Processors
Processors Wattage Core count Thread count Speed Cache
11th Generation
Intel Core
i5-11400F
65 W 6 12 Up to 4.4 GHz 12 MB
11th Generation
Intel Core i7-11700
65 W 8 16 Up to 4.9 GHz 16 MB
11th Generation
Intel Core
i7-11700F
65 W 8 16 Up to 4.9 GHz 16 MB
Intel Pentium Gold
G6405
58 W 2 4 Up to 4.1 GHz 4 MB
Intel Celeron
G5905
58 W 2 2 Up to 3.5 GHz 4 MB
Chipset
The following table lists the details of the chipset supported by your Inspiron 3891.
Table 4. Chipset
Description Option one Option two Option three
Processors 10th Generation Intel Core
i3/i5/i7
11th Generation Intel Core i5/i7 Intel Pentium/Celeron
Chipset Intel B560 Intel B560 Intel B560
DRAM bus width 64-bit 64-bit 64-bit
Flash EPROM 32 MB 32 MB 32 MB
PCIe bus Up to Gen3 Up to Gen3 Up to Gen3
Operating system
Your Inspiron 3891 supports the following operating systems:
●Windows 10 Home, 64-bit
●Windows 10 Pro, 64-bit
●Ubuntu 20.04 LTS
Memory
The following table lists the memory specifications of your Inspiron 3891.
Table 5. Memory specifications
Description Values
Memory slots Two UDIMM slots
Memory type DDR4
14 Specifications of Inspiron 3891

Table 5. Memory specifications
Description Values
Memory speed 2933 MHz, 2666 MHz
NOTE: 2933 MHz speed memory modules are only
available for computers that are shipped with 11th
Generation Intel Core i5/i5F/i7/i7F processors.
Maximum memory configuration 64 GB
Minimum memory configuration 4 GB
Memory size per slot 4 GB, 8 GB, 12 GB, 16 GB, 32 GB
Memory configurations supported ●4 GB, 1 x 4 GB, DDR4, 2666 MHz, 2933 MHz
●8 GB, 1 x 8 GB, DDR4, 2666 MHz, 2933 MHz
●8 GB, 2 x 4 GB, dual-channel, DDR4, 2666 MHz, 2933
MHz
●12 GB, 1 x 4 GB + 1 x 8 GB, DDR4, 2666 MHz, 2933 MHz
●16 GB, 1 x 16 GB, DDR4, 2666 MHz, 2933 MHz
●16 GB, 2 x 8 GB, dual-channel, DDR4, 2666 MHz, 2933
MHz
●32 GB, 1 x 32 GB, DDR4, 2666 MHz, 2933 MHz
●32 GB, 2 x 16 GB, dual-channel, DDR4, 2666 MHz, 2933
MHz
●64 GB, 2 x 32 GB, dual-channel, DDR4, 2666 MHz, 2933
MHz
External ports
The following table lists the external ports of your Inspiron 3891.
Table 6. External ports
Description Values
Network port One RJ-45 port
USB ports ●Three USB 3.2 Gen 1 ports
●One USB 3.2 Gen 1 Type-C port
●Four USB 2.0 ports
Audio port One global headset jack (front) and Line-out audio port (rear)
Video port One HDMI 1.4b port and one VGA port
NOTE: The access to these ports is blocked for
computers that are shipped with 11th Generation Intel
Core i5-11400F and 11th Generation Intel Core i7-11700F
processors.
Media-card reader Supported, optional
Security One Kensington lock slot and one padlock loop
Specifications of Inspiron 3891 15

Internal slots
The following table lists the internal slots of your Inspiron 3891.
Table 7. Internal slots
Description Values
PCIe One full-height Gen 3 PCIe x16 slot and One full-height Gen 3
PCIe x1 slot
SATA One SATA 2.0 slot for slim optical drive and two SATA 3.0
slots for 3.5-inch/2.5-inch hard drive
M.2 ●One M.2 2230 slot for Wi-Fi/Bluetooth
●One M.2 2230/2280 slot for solid-state drive
NOTE: To learn more about the features of different
types of M.2 cards, see the knowledge base article
SLN301626 at www.dell.com/support.
Ethernet
The following table lists the wired Ethernet Local Area Network (LAN) specifications of your Inspiron 3891.
Table 8. Ethernet specifications
Description Values
Model number Realtek RTL8111HSD
Transfer rate 10/100/1000 Mbps
Wireless module
The following table lists the Wireless Local Area Network (WLAN) module specifications of your Inspiron 3891.
Table 9. Wireless module specifications
Description Option one Option two Option three
Model number Qualcomm QCA61x4A Qualcomm QCA9377 Intel AX201
Transfer rate Up to 867 Mbps Up to 433 Mbps Up to 2400 Mbps
Frequency bands supported 2.4 GHz/5 GHz 2.4 GHz/5 GHz 2.4 GHz/5 GHz
Wireless standards ●WiFi 802.11a/b/g
●Wi-Fi 4 (WiFi 802.11n)
●Wi-Fi 5 (WiFi 802.11ac)
●Wi-Fi 802.11 a/b/g
●Wi-Fi 4 (WiFi 802.11n)
●Wi-Fi 5 (WiFi 802.11ac)
●WiFi 802.11a/b/g
●Wi-Fi 4 (WiFi 802.11n)
●Wi-Fi 5 (WiFi 802.11ac)
●Wi-Fi 6 (WiFi 802.11ax)
Encryption ●64-bit/128-bit WEP
●AES-CCMP
●TKIP
●64-bit/128-bit WEP
●AES-CCMP
●TKIP
●64-bit/128-bit WEP
●AES-CCMP
●TKIP
Bluetooth Bluetooth 5.0 Bluetooth 5.0 Bluetooth 5.1
16 Specifications of Inspiron 3891

Audio
The following table lists the audio specifications of your Inspiron 3891.
Table 10. Audio specifications
Description Values
Audio controller C-media CM6548
Stereo conversion Supported
Internal audio interface USB 2.0
External audio interface Global headset jack and Line-out audio port
Storage
This section lists the storage options on your Inspiron 3891.
Your Inspiron 3891 supports one of the following storage configurations:
●One 3.5-inch hard-disk drive
●One M.2 2230/2280 solid-state drive
●One M.2 2230/2280 solid-state drive + One 3.5-inch hard-disk drive
The primary drive of your Inspiron 3891 varies with the storage configuration. For computers:
●with a solid-state drive, the solid-state drive is the primary drive
●without a solid-state drive, the hard-disk drive is the primary drive
Table 11. Storage specifications
Storage type Interface type Capacity
3.5-inch SATA hard drive SATA AHCI, up to 6 Gbps Up to 2 TB
M.2 2230, PCIe NVMe, solid-state drive PCIe Gen 3 NVMe, up to 32 Gbps Up to 512 GB
Slim optical drive, optional SATA AHCI, up to 1.5 Gbps N/A
Media-card reader
The following table lists the media cards supported by your Inspiron 3891.
Table 12. Media-card reader specifications
Description Values
Media-card type SD-card slot
Media-cards supported ●Secure Digital (SD)
●Secure Digital High Capacity (SDHC)
●Secure Digital Extended Capacity (SDXC)
NOTE: The maximum capacity supported by the media-card reader varies depending on the standard of the media card
installed in your computer.
Specifications of Inspiron 3891 17

Power supply
The following table lists the power supply specifications of your Inspiron 3891.
Table 13. Power supply specifications
Description Option 1 Option 2
Type 260 W Bronze 360 W Bronze
Input voltage 90 VAC–264 VAC 90 VAC–264 VAC
Input frequency 47 Hz–63 Hz 47 Hz–63 Hz
Input current (maximum) 4.20 A 5 A
Output current (continuous) 16.50 A 18 A
Rated output voltage 12 VDC 12 VDC
Temperature range:
Operating 5°C to 45°C (41°F to 113°F) 5°C to 45°C (41°F to 113°F)
Storage -40°C to 70°C (-40°F to 158°F) -40°C to 70°C (-40°F to 158°F)
GPU—Integrated
The following table lists the specifications of the integrated Graphics Processing Unit (GPU) supported by your Inspiron 3891.
Table 14. GPU—Integrated
Controller External display support Memory size Processor
Intel HD Graphics One HDMI 1.4b port and one
VGA port
NOTE: The access
to these ports is
blocked for computers
that are shipped with
11th Generation Intel
Core i5-11400F and 11th
Generation Intel Core
i7-11700F processors.
Shared memory 11th Generation Intel Core
i5/i7
Intel HD Graphics One HDMI 1.4b port and one
VGA port
Shared memory 10th Generation Intel Core i3
Intel HD Graphics One HDMI 1.4b port and one
VGA port
Shared memory Intel Pentium/Celeron
GPU—Discrete
The following table lists the specifications of the discrete Graphics Processing Unit (GPU) supported by your Inspiron 3891.
Table 15. GPU—Discrete
18 Specifications of Inspiron 3891

Table 15. GPU—Discrete
Controller External display support Memory size Memory type
NVIDIA GeForce GTX 1660
Super
●One HDMI 2.0b port
●One DisplayPort 1.4 port
●One DVI-D port
6 GB GDDR6
NVIDIA GeForce GTX 1650
Super
●One HDMI 2.0b port
●One DisplayPort 1.4 port
●One DVI-D port
4 GB GDDR6
NVIDIA GeForce GT 1030 ●One HDMI 2.0b port
●One DVI-D port
2 GB GDDR5
NVIDIA GeForce GT 730 ●One HDMI 1.4 port
●One DVI-D port
●One VGA port
2 GB GDDR5
Operating and storage environment
This table lists the operating and storage specifications of your Inspiron 3891.
Airborne contaminant level: G1 as defined by ISA-S71.04-1985
Table 16. Computer environment
Description Operating Storage
Temperature range 10°C to 35°C (50°F to 95°F) -40°C to 65°C (-40°F to 149°F)
Relative humidity (maximum) 20% to 90% (non-condensing) 0% to 95% (non-condensing)
Vibration (maximum)*0.66 GRMS 1.30 GRMS
Shock (maximum) 110 G† 160 G†
Altitude range -15.2 m to 3048 m (-49.87 ft to 10000
ft)
-15.2 m to 10668 m (-49.87 ft to 35000
ft)
CAUTION: Operating and storage temperature ranges may differ among components, so operating or storing
the device outside these ranges may impact the performance of specific components.
* Measured using a random vibration spectrum that simulates user environment.
† Measured using a 2 ms half-sine pulse when the hard drive is in use.
Specifications of Inspiron 3891 19

Getting help and contacting Dell
Self-help resources
You can get information and help on Dell products and services using these self-help resources:
Table 17. Self-help resources
Self-help resources Resource location
Information about Dell products and services www.dell.com
My Dell
Tips
Contact Support In Windows search, type Contact Support, and press
Enter.
Online help for operating system www.dell.com/support/windows
www.dell.com/support/linux
Troubleshooting information, user manuals, setup instructions,
product specifications, technical help blogs, drivers, software
updates, and so on.
www.dell.com/support
Dell knowledge base articles for a variety of computer
concerns.
1. Go to https://www.dell.com/support/home/?
app=knowledgebase.
2. Type the subject or keyword in the Search box.
3. Click Search to retrieve the related articles.
Learn and know the following information about your product:
●Product specifications
●Operating system
●Setting up and using your product
●Data backup
●Troubleshooting and diagnostics
●Factory and system restore
●BIOS information
See Me and My Dell at www.dell.com/support/manuals.
To locate the Me and My Dell relevant to your product,
identify your product through one of the following:
●Select Detect Product.
●Locate your product through the drop-down menu under
View Products.
●Enter the Service Tag number or Product ID in the
search bar.
Contacting Dell
To contact Dell for sales, technical support, or customer service issues, see www.dell.com/contactdell.
NOTE: Availability varies by country and product, and some services may not be available in your country.
NOTE: If you do not have an active internet connection, you can find contact information on your purchase invoice, packing
slip, bill, or Dell product catalog.
4
20 Getting help and contacting Dell