Dell Pro Tower QCT1255: руководство по обслуживанию

Dimensions and weight

The following table lists the height, width, depth, and weight of your Dell Pro Tower QCT1255.

Table 1. Dimensions and weight
The following table provides the detailed display specifications of Dell Pro Tower QCT1255.
Description		Values
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 that is ordered and manufacturing variability.		Minimum: 4.35 kg (9.59 lb) Maximum: 6.76 kg (14.91 lb)

Processor

The following table lists the details of the processors that are supported on your Dell Pro Tower QCT1255.

Table 1. ProcessorThis table provides the specifications of the processors supported on your Dell Pro Tower QCT1255.
Description	Option one	Option two	Option three	Option four
Processor type	AMD Ryzen 3 8300G	AMD Ryzen 3 PRO 8300G	AMD Ryzen 5 8500G	AMD Ryzen 5 PRO 8500G
Processor wattage	65 W	65 W	65 W	65 W
Processor core count	4	4	6	6
Processor thread count	8	8	12	12
Processor speed	Up to 4.90 GHz	Up to 4.90 GHz	Up to 5 GHz	Up to 5 GHz
Processor cache	12 MB	12 MB	22 MB	22 MB
Integrated graphics	AMD Radeon 740M Graphics	AMD Radeon 740M Graphics	AMD Radeon 740M Graphics	AMD Radeon 740M Graphics
AI technology	None	None	None	None
Neural Processing Unit (NPU) performance	Not applicable	Not applicable	Not applicable	Not applicable
NOTE:Tera Operations Per Second (TOPS) is an AI performance metric that measures how many trillions of operations per second an AI processor can perform.
Description	Option five	Option six	Option seven	Option eight
Processor type	AMD Ryzen 5 8600G	AMD Ryzen 5 PRO 8600G	AMD Ryzen 7 8700G	AMD Ryzen 7 PRO 8700G
Processor wattage	65 W	65 W	65 W	65 W
Processor core count	6	6	8	8
Processor thread count	12	12	16	16
Processor speed	Up to 5 GHz	Up to 5 GHz	Up to 5.10 GHz	Up to 5.10 GHz
Processor cache	22 MB	22 MB	24 MB	24 MB
Integrated graphics	AMD Radeon 760M Graphics	AMD Radeon 760M Graphics	AMD Radeon 780M Graphics	AMD Radeon 780M Graphics
AI technology	AMD Ryzen AI	AMD Ryzen AI	AMD Ryzen AI	AMD Ryzen AI
Neural Processing Unit (NPU) performance	Up to 16 TOPS	Up to 16 TOPS	Up to 16 TOPS	Up to 16 TOPS
NOTE:Tera Operations Per Second (TOPS) is an AI performance metric that measures how many trillions of operations per second an AI processor can perform.
Description	Option nine	Option ten	Option eleven
Processor type	AMD Ryzen AI 5 435G	AMD Ryzen AI 5 440G	AMD Ryzen AI 7 450G
Processor wattage	65 W	65 W	65 W
Processor core count	6	6	8
Processor thread count	12	12	16
Processor speed	Up to 4.50 GHz	Up to 4.80 GHz	Up to 5.10 GHz
Processor cache	14 MB	22 MB	24 MB
Integrated graphics	AMD Radeon 840M graphics	AMD Radeon 840M graphics	AMD Radeon 860M graphics
AI technology	AMD Ryzen AI	AMD Ryzen AI	AMD Ryzen AI
Neural Processing Unit (NPU) performance	Up to 50 TOPS	Up to 50 TOPS	Up to 50 TOPS
NOTE:Tera Operations Per Second (TOPS) is an AI performance metric that measures how many trillions of operations per second an AI processor can perform.
Description	Option twelve	Option thirteen	Option fourteen
Processor type	AMD Ryzen AI 5 PRO 435G	AMD Ryzen AI 5 PRO 440G	AMD Ryzen AI 7 PRO 450G
Processor wattage	65 W	65 W	65 W
Processor core count	6	6	8
Processor thread count	12	12	16
Processor speed	Up to 4.50 GHz	Up to 4.80 GHz	Up to 5.10 GHz
Processor cache	14 MB	22 MB	24 MB
Integrated graphics	AMD Radeon 840M graphics	AMD Radeon 840M graphics	AMD Radeon 860M graphics
AI technology	AMD Ryzen AI	AMD Ryzen AI	AMD Ryzen AI
Neural Processing Unit (NPU) performance	Up to 50 TOPS	Up to 50 TOPS	Up to 50 TOPS
NOTE:Tera Operations Per Second (TOPS) is an AI performance metric that measures how many trillions of operations per second an AI processor can perform.

Chipset

The following table lists the details of the chipset that is supported by your Dell Pro Tower QCT1255.

Table 1. Chipset The following table lists the details of the chipset that is supported by your Dell Pro Tower QCT1255.
Description	Values
Chipset	AMD PRO 665
Processor	AMD Ryzen 3/5/7
DRAM bus width	128-bit
Flash EPROM	64 MB + 2 MB
PCIe bus	Up to Gen4

Operating system

Your Dell Pro Tower QCT1255 supports the following operating systems:

Windows 11 Home
Windows 11 Pro
Windows 11 Pro Education
Ubuntu Linux 24.04 LTS

Memory

The following table lists the memory specifications that are supported by your Dell Pro Tower QCT1255.

Table 1. Memory specificationsThe following table lists the memory specifications of your computer.
Description	Values
Memory slots	Two UDIMM slots
Memory type	DDR5
Memory speed	4800 MT/s, for computers shipped with AMD Ryzen 8000 series processors. 5600 MT/s, for computers shipped with AMD Ryzen AI 400 series processors.
Maximum memory configuration	64 GB
Minimum memory configuration	8 GB
Memory size per slot	8 GB, 16 GB, or 32 GB
Memory configurations supported	For computers shipped with AMD Ryzen 8000 series processors: 8 GB: 1 x 8 GB, single-channel DDR5, up to 4800 MT/s 16 GB: 1 x 16 GB, single-channel DDR5, up to 4800 MT/s 16 GB: 2 x 8 GB, dual-channel DDR5, up to 4800 MT/s 32 GB: 1 x 32 GB, single-Channel DDR5, up to 4800 MT/s 32 GB: 2 x 16 GB, dual-Channel DDR5, up to 4800 MT/s 64 GB: 2 x 32 GB, dual-Channel DDR5, up to 4800 MT/s For computers shipped with AMD Ryzen AI 400 series processors: 8 GB: 1 x 8 GB, single-channel DDR5, up to 5600 MT/s 16 GB: 1 x 16 GB, single-channel DDR5, up to 5600 MT/s 16 GB: 2 x 8 GB, single-channel DDR5, up to 5600 MT/s 32 GB: 1 x 32 GB, single-Channel DDR5, up to 5600 MT/s 32 GB: 2 x 16 GB, dual-Channel DDR5, up to 5600 MT/s 64 GB: 2 x 32 GB, dual-Channel DDR5, up to 5600 MT/s

External ports and slots

The following table lists the external ports and slots of your Dell Pro Tower QCT1255.

Table 1. External ports and slots
The following table lists ports and connectors available on Dell Pro Tower QCT1255.
Description	Values
Network port	One RJ45 ethernet port (1 Gbps)
USB ports	Two USB 2.0 (480 Mbps) ports Two USB 2.0 (480 Mbps) with SmartPower On ports One USB 3.2 Gen 1 (5 Gbps) Type-C port Three USB 3.2 Gen 1 (5 Gbps) ports
Audio port	One global headset port
Video port(s)	One DisplayPort 1.4a (HBR3) port One HDMI 2.1 (TMDS) port
Power port	One power-cable connector
Peripheral port	One legacy serial port (optional)
Security-cable slot	One padlock ring One security cable slot (for a Kensington lock)

External Port (optional module slot)

The following table lists the external ports that are supported on the optional module slot for Dell Pro Tower QCT1255.

NOTE:The ports that are listed in this table are mutually exclusive. Your Dell Pro Tower QCT1255 can only support one of the listed options.

Table 1. External ports (optional module)The following table lists the external ports that are supported on the optional module on your Dell Pro Tower QCT1255.
Description	Values
USB ports	Two USB 3.2 Gen 2 (10 Gbps) ports One USB 3.2 Gen 2 (10 Gbps) Type-C with DisplayPort Alt Mode port
Video ports	For computers shipped with AMD Ryzen 8000 series processors: One HDMI 2.1 (FRL10) port One VGA port One DisplayPort 1.4 (HBR3) port For computers shipped with AMD Ryzen AI 400 series processors: One HDMI 2.1 (FRL12) port One VGA port One DisplayPort 2.1 (UHBR10) port

Internal slots

The following table lists the internal slots on your Dell Pro Tower QCT1255.

Table 1. Internal slotsThe following table lists the internal slots on your Dell Pro Tower QCT1255.
Description	Values
M.2	One M.2 2230 slot for WiFi and Bluetooth combo card One M.2 2230/2280 slot for solid-state drive NOTE:To learn more about the features of different types of M.2 cards, search in the Knowledge Base Resource at Dell Support Site.
SATA	One SATA 3.0 slot for 3.5-inch hard drive One SATA 3.0 slot for 3.5-inch hard drive or slimline optical drive
PCIe	Two full-height PCIe x1 slots One full-height PCIe x16 slot NOTE:The wiring on the PCIe x16 slot will vary depending on the processor installed on the computer.

Ethernet

The following table lists the wired ethernet Local Area Network (LAN) specifications of your Dell Pro Tower QCT1255.

Table 1. Ethernet specifications
The following table provides the specifications of Ethernet that is supported by your Dell Pro Tower QCT1255.
Description	Values
Model	Realtek RTL8111EPP
Transfer rate	10/100/1000 Mbps

Wireless module

The following table lists the Wireless Local Area Network (WLAN) modules that are supported on your Dell Pro Tower QCT1255.

Table 1. Wireless module specifications
The following table provides the wireless module specifications of Dell Pro Tower QCT1255.
Description	Option one	Option two
Model number	MediaTek Wi-Fi 6 MT7920	MediaTek Wi-Fi 7 MT7925
Transfer rate	Up to 1200 Mbps	Up to 5760 Mbps
Frequency bands supported	2.4 GHz/5 GHz	2.4 GHz/5 GHz/6 GHz
Wireless standards	WiFi 802.11a/b/g Wi-Fi 4 (WiFi 802.11n) Wi-Fi 5 (WiFi 802.11ac) Wi-Fi 6 (WiFi 802.11ax)	WiFi 802.11a/b/g Wi-Fi 4 (WiFi 802.11n) Wi-Fi 5 (WiFi 802.11ac) Wi-Fi 6 (WiFi 802.11ax) Wi-Fi 7 (WiFi 802.11be)
Encryption	64-bit/128-bit WEP AES-CCMP TKIP	64-bit/128-bit WEP AES-CCMP TKIP
Bluetooth wireless card NOTE:The functionality of the Bluetooth wireless card may vary based on the operating system.	Bluetooth 5.4	Bluetooth 5.4

Audio

The following table lists the audio specifications of your Dell Pro Tower QCT1255.

Table 1. Audio specifications
The following table provides the detailed audio specifications of Dell Pro Tower QCT1255.
Description	Values
Audio type	High Definition Audio
Audio controller	Realtek ALC3204
Internal audio interface	High Definition Audio (HDA) interface
External audio interface	One global headset port

Storage

This section lists the storage options on your Dell Pro Tower QCT1255.

Your Dell Pro Tower QCT1255 supports a combination of the following storage configurations:

One 3.5-inch hard drive
One M.2 2230/2280 solid-state drive

The primary drive of your Dell Pro Tower QCT1255 varies with the storage configuration. For computers:

With a M.2 drive, the M.2 drive is the primary drive
Without a M.2 drive, the 3.5-inch hard drive is the primary drive

Table 1. Storage specifications
The following table provides the different storage options available on Dell Pro Tower QCT1255.
Storage type	Interface type	Capacity
3.5-inch hard drive	SATA AHCI, up to 6 Gbps	Up to 4 TB
M.2 2230 QLC solid-state drive	PCIe Gen4x4 NVMe, up to 64 GT/s	Up to 1 TB
M.2 2230 TLC solid-state drive	PCIe Gen4x4 NVMe, up to 64 GT/s	Up to 1 TB
9.5 mm 8x slimline DVD-RW drive	SATA AHCI, up to 1.5 Gbps	One slimline DVD-RW

Power ratings

The following table lists the power rating specifications of Dell Pro Tower QCT1255.

Table 1. Power ratings
The following table provides the power rating specifications of Dell Pro Tower QCT1255.
Description	Option one	Option two
Type	180 W, Bronze	360 W, Platinum
Input voltage	90 VAC–264 VAC	90 VAC–264 VAC
Input frequency	47 Hz–63 Hz	47 Hz–63 Hz
Input current (maximum)	3 A	5 A
Output current (continuous)	Operating: 12 VA: 15 A 12 VB: 14 A Storage: 12 VA: 1.50 A 12 VB: 3.30 A	Operating: 12 VA: 18 A 12 VB: 18 A 12 VC: 13 A Storage: 12 VA: 1.50 A 12 VB: 3.30 A 12 VC: 0 A
Rated output voltage	12 VA 12 VB	12 VA 12 VB 12 VC
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)

Power supply connector

The following table lists the Power supply connector specifications of your Dell Pro Tower QCT1255.

Table 1. Power supply connector The following table lists the Power supply connector specifications of your Dell Pro Tower QCT1255.
Power supply	Connectors
180 W internal power supply unit (PSU), 80 Plus Bronze	One 4-pin connector for processor One 8-pin connector for processor
360 W internal power supply unit (PSU), 80 Plus Platinum	Two 4-pin connectors for processor One 8-pin connector for system board One 8-pin connector for graphic card NOTE:An 8-pin power cable is only included on configurations with a discrete graphics card that requires it.

GPU—Integrated

The following table lists the specifications of the integrated Graphics Processing Unit (GPU) supported by your Dell Pro Tower QCT1255.

Table 1. GPU—Integrated
The following table provides the detailed integrated graphics specifications of Dell Pro Tower QCT1255.
Controller	Memory size	Processor
AMD Radeon 740M Graphics	Shared system memory	AMD Ryzen 3 8300G AMD Ryzen 3 PRO 8300G AMD Ryzen 5 8500G AMD Ryzen 5 PRO 8500G
AMD Radeon 760M Graphics	Shared system memory	AMD Ryzen 5 8600G AMD Ryzen 5 PRO 8600G
AMD Radeon 780M Graphics	Shared system memory	AMD Ryzen 7 8700G AMD Ryzen 7 PRO 8700G
AMD Radeon 840M Graphics	Shared system memory	AMD Ryzen AI 5 435G AMD Ryzen AI 5 440G AMD Ryzen AI 5 PRO 435G AMD Ryzen AI 5 PRO 440G
AMD Radeon 860M Graphics	Shared system memory	AMD Ryzen AI 7 450G AMD Ryzen AI 7 PRO 450G

GPU—Discrete

The following table lists the specifications of the discrete Graphics Processing Unit (GPU) supported by your Dell Pro Tower QCT1255.

Table 1. GPU—Discrete
The following table provides the detailed discrete graphics specifications of Dell Pro Tower QCT1255.
Controller	External display support	Memory size	Memory type
NVIDIA RTX A400	Four Mini DisplayPort 1.4a ports	4 GB	GDDR6

Hardware security

The following table lists the hardware security of your Dell Pro Tower QCT1255.

Table 1. Hardware security The following table provides the hardware security details on your Dell Pro Tower QCT1255.
Hardware security
Chassis intrusion switch
Chassis lock slot support
Security-cable slot (Kensington lock)
Local hard drive data wipe through BIOS (Secure Erase)
Lockable cable covers
Microsoft 10 Device Guard and Credential Guard (Enterprise SKU)
Microsoft Windows BitLocker
Padlock ring
SafeBIOS: includes Dell Off-host BIOS Verification, BIOS Resilience, BIOS Recovery, and additional BIOS Controls
SafeID including Trusted Platform Module (TPM) 2.0
Self-encrypting storage drives (Opal, FIPS)
Smart card keyboard (FIPS)
Supply chain tamper alerts
Trusted Platform Module TPM 2.0
Post-Quantum Cryptography (PQC)

Environmental

The following table lists the environmental specifications of your Dell Pro Tower QCT1255.

Table 1. Environmental The following table lists the environmental specifications of your Dell Pro Tower QCT1255.
Feature	Values
Recyclable packaging	Yes
BFR/PVC—free chassis	Yes
Vertical orientation packaging support	Yes
Multi-Pack packaging	Yes
Energy-Efficient Power Supply	Yes
ENV0424 compliant	Yes

NOTE: Wood‐based fiber packaging contains a minimum of 35% recycled content by total weight of wood‐based fiber. Packaging that contains without wood‐based fiber can be claimed as Not Applicable. The anticipated required criteria for EPEAT 2018.

Regulatory compliance

The following table lists the regulatory compliance of your Dell Pro Tower QCT1255.

Table 1. Regulatory complianceThe following table lists the regulatory compliance of your Dell Pro Tower QCT1255.
Regulatory compliance
Product Safety, EMC and Environmental Datasheets
Dell Regulatory Compliance Home page
Responsible Business Alliance policy

Operating and storage environment

This table lists the operating and storage specifications of your Dell Pro Tower QCT1255.

Airborne contaminant level: G1 as defined by ISA-S71.04-1985

Table 1. Computer environment
The following table lists the operating and storage environment conditions of Dell Pro Tower QCT1255.
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 80% (non-condensing)	5% to 95% (non-condensing)
Vibration (maximum)^*	0.26 GRMS	1.37 GRMS
Shock (maximum)	40 G†	105 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 the user environment.}

^{† Measured using a 2 ms half-sine pulse.}