changfan CF-640G4 – 4U4GPU AMD High-Performance Server
The changfan CF-640G4 series is a standard 4U rackmount high-performance server powered by a single AMD EPYC 8004/7003/7002 processor, supporting up to 4 dual-width GPUs. With high cost-effectiveness, exceptional performance, outstanding expandability, and high reliability, it meets diverse customer application requirements. It provides an ideal hardware platform for AI, deep learning, modeling and simulation, post-production, and graphics rendering, making it an excellent choice for university labs and research institutions.
Key Features:
Independent R&D, High Cost-Effectiveness: Independently designed and developed by Longfan Technology, with a deeply optimized system architecture offering competitive pricing
4U Rackmount High-Performance Server: Standard 4U rackmount design, dimensions 438mm×177mm×660mm, suitable for standard data centers and server rooms
Single AMD EPYC 8004/7003/7002 Series Processors: Flexible compatibility across multiple AMD EPYC platforms to meet varying computing and budget requirements
Up to 2TB DDR4 RECC 3200 Memory: Supports up to 8 DDR4 RECC 3200 memory slots (7002/7003 platform), fully meeting memory-intensive application needs
Flexible Storage Configuration: Supports 8/12/24 SATA/SAS drive bays with optional NVMe support, balancing storage capacity and read/write performance
Up to 4 Dual-Width GPUs: Supports up to 4 dual-width GPUs for compute-intensive scenarios including AI training, inference, and graphics rendering
Rear GPU Fan Module: Dedicated GPU cooling design ensures stable operation under high loads, protecting long-duration training tasks
1+1 Redundant Power Supply: 2000W/2700W 80Plus Platinum efficient redundant power supply for 24/7 mission-critical operation
Intelligent Remote Management: Onboard BMC management module (AST2500/AST2600) supporting IPMI 2.0, SOL, KVM Over IP, and virtual media for remote monitoring and maintenance
Applications:
AI & Deep Learning: Model training/inference, neural network deployment
High-Performance Computing (HPC): Scientific computing, engineering simulation, complex numerical analysis
Cloud Computing & VDI Virtualization: GPU virtualization, cloud gaming, remote workstations
Graphics Rendering & Post-Production: 3D rendering, visual effects, virtual production
University Research & Laboratories: Academic research, algorithm validation, teaching labs
OEM/ODM Customization Services:
Longfan Technology offers comprehensive customization from motherboard design to system integration:
Flexible AMD EPYC processor platform selection (7002/7003/8004 series)
GPU compatibility optimization (NVIDIA, AMD, etc.)
Custom storage backplanes supporting SATA/SAS/NVMe hybrid configurations
Chassis appearance, color, logo, and panel layout customization
Thermal solution optimization (auxiliary fans or liquid cooling interfaces)
Pre-installed OS, ROCm, deep learning frameworks, and drivers for out-of-box experience
Product Specifications:Item
CF-640G4-A (EPYC 7002/7003)
CF-640G4-B (EPYC 8004)
Processor
Single AMD EPYC 7003/7002, TDP 280W
Single AMD EPYC 8004, TDP 225W
Socket Type
SP3
SP6
Memory
8×DDR4 RECC 3200, up to 2TB
8×DDR5 RECC 4800, up to 768GB
Storage Bays
8/12/24×3.5"/2.5" SATA/SAS hot-swap (12Gb/s); Optional NVMe; Onboard 2×SFF-8654 for 4 NVMe
Same as left
PCIe Expansion
5×PCIe Gen.4 x16, 2×M.2 PCIe 3.0 x4; 2×SFF-8654 for 4 NVMe
4×PCIe Gen.5 x16, 2×M.2 PCIe 5.0 x4; 2×MCIO x4 / 2×MCIO x8
I/O Ports
2×USB 3.0, 1×Header, 2×USB 2.0, 1×VGA, 1×COM
2×USB 3.2, 1×VGA, 1×COM
Network
2×RJ45 Gigabit, 1×RJ45 IPMI
Same as left
Remote Mgmt
AST2500 BMC, IPMI 2.0, SOL, KVM Over IP, virtual media
AST2600 BMC, IPMI 2.0, SOL, KVM Over IP, virtual media
Cooling
4×92mm hot-swap fans/PWM + 2×80mm rear hot-swap fans/PWM (CPU); Optional 2×80mm rear fans (GPU)
Same as left
Power Supply
2000W / 2700W (1+1) 80Plus Platinum redundant
Same as left
Dimensions
438mm × 177mm × 660mm
Same as left
Environment
10°C–35°C operating, 8%–90% humidity; -40°C–70°C storage, 5%–95% humidity
Same as left
OS Support
Windows Server, RHEL, CentOS, Ubuntu, SUSE Linux
Same as left
