Dell Dell Pro Slim (QCS1255)
Dell's 2025+ AMD-based slim business desktop (successor to the OptiPlex SFF line), offered with AMD Ryzen 8000G and Ryzen AI 400-series APUs on the AMD PRO 665 chipset, in an 8.5-litre chassis with a slim-optical bay and an optional legacy serial port.
Memory
- Slots
- Two UDIMM slots
- Type
- DDR5
- Speed
- 4800 MT/s (Ryzen 8000 series) or 5600 MT/s (Ryzen AI 400 series)
- Minimum
- 8 GB
- Maximum
- 64 GB
- Per-slot sizes
- 8 GB, 16 GB, or 32 GB
- Configurations
- Single- or dual-channel; up to 2 x 32 GB dual-channel
Storage
- 3.5" HDD
- SATA AHCI up to 6 Gbps, up to 4 TB
- M.2 2230 QLC SSD
- PCIe Gen4x4 NVMe up to 64 GT/s, up to 1 TB
- M.2 2230 TLC SSD
- PCIe Gen4x4 NVMe up to 64 GT/s, up to 1 TB
- Optical
- 9.5 mm 8x slimline DVD-RW (optional), SATA AHCI up to 1.5 Gbps
- Primary drive
- M.2 solid-state drive
Graphics
- Integrated (Ryzen 3/5 8300G-8500G)
- AMD Radeon 740M Graphics, shared system memory
- Integrated (Ryzen 5 8600G)
- AMD Radeon 760M Graphics, shared system memory
- Integrated (Ryzen 7 8700G)
- AMD Radeon 780M Graphics, shared system memory
- Integrated (Ryzen AI 5 435G/440G)
- AMD Radeon 840M graphics, shared system memory
- Integrated (Ryzen AI 7 450G)
- AMD Radeon 860M graphics, shared system memory
Expansion
- M.2
- 1 x M.2 2230 slot (WiFi/Bluetooth combo card); 1 x M.2 2230/2280 slot (SSD)
- SATA
- 1 x SATA 3.0 (3.5" HDD); 1 x SATA 3.0 (slimline optical drive)
- PCIe
- 2 x half-height Gen3 PCIe x1; 1 x half-height Gen4 PCIe x16 (wired as x8, lane count varies by processor)
Networking
- Ethernet
- Realtek RTL8111EPP, 10/100/1000 Mbps
- Wi-Fi option 1
- MediaTek Wi-Fi 6 MT7920, up to 1200 Mbps, 2.4/5 GHz, Bluetooth 5.4
- Wi-Fi option 2
- MediaTek Wi-Fi 7 MT7925, up to 5760 Mbps, 2.4/5/6 GHz, Bluetooth 5.4
Power
- Option 1
- 180 W internal PSU, 80 PLUS Bronze, 90-264 VAC
- Option 2
- 360 W internal PSU, 80 PLUS Platinum, 90-264 VAC
Ports
- Front
- 2 x USB 2.0; 2 x USB 2.0 with SmartPower On; 1 x USB 3.2 Gen 1 (5 Gbps) Type-C; 1 x global headset jack; optional slim optical drive
- Rear
- 1 x DisplayPort 1.4a (HBR3); 1 x HDMI 2.1 (TMDS); 2 x USB 3.2 Gen 1 (5 Gbps); 1 x RJ45 (1 Gbps); 1 x power-cable connector; padlock ring; Kensington security-cable slot; optional legacy serial port
- Optional rear module (mutually exclusive)
- 2 x USB 3.2 Gen 2 (10 Gbps), or 1 x USB 3.2 Gen 2 Type-C with DisplayPort Alt Mode; plus, on Ryzen 8000-series units, HDMI 2.1 (FRL10)/VGA/DisplayPort 1.4 (HBR3), or on Ryzen AI 400-series units, HDMI 2.1 (FRL12)/VGA/DisplayPort 2.1 (UHBR10)
Physical
- Dimensions
- 303.50 x 95 x 293 mm (11.95 x 3.74 x 11.54 in.), H x W x D
- Weight
- 3.908 kg (8.62 lb) minimum - 5.68 kg (12.52 lb) maximum
Management
- Physical security
- Chassis intrusion switch; chassis lock slot support; Kensington security-cable slot; padlock ring; lockable cable covers
- Data protection
- TPM 2.0; Microsoft Windows BitLocker; self-encrypting drives (Opal, FIPS); local hard-drive data wipe via BIOS (Secure Erase); Post-Quantum Cryptography (PQC)
- Advanced security
- Dell SafeID with TPM 2.0; FIPS smart card keyboard; Microsoft Windows Device Guard and Credential Guard (Enterprise SKU); Dell SafeBIOS (Off-host BIOS Verification, BIOS Resilience, BIOS Recovery); supply chain tamper alerts; AMD Secure Processor (PSP); AMD Platform Secure Boot
Operating systems
- Windows
- Windows 11 Home; Windows 11 Pro; Windows 11 Pro Education
- Linux
- Ubuntu Linux 24.04 LTS
Processors
- AMD Ryzen 3 8300G
- AMD Ryzen 3 PRO 8300G
- AMD Ryzen 5 8500G
- AMD Ryzen 5 PRO 8500G
- AMD Ryzen 5 8600G
- AMD Ryzen 5 PRO 8600G
- AMD Ryzen 7 8700G
- AMD Ryzen 7 PRO 8700G
- AMD Ryzen AI 5 435G
- AMD Ryzen AI 5 440G
- AMD Ryzen AI 7 450G
- AMD Ryzen AI 5 PRO 435G
- AMD Ryzen AI 5 PRO 440G
- AMD Ryzen AI 7 PRO 450G