Overview of rack servers for sale
Rack servers are a server type specially designed for data center environments, famous for their standardized size, high-density deployment capability, and excellent performance.
The core features of rack servers for sale include:
Standardized dimensions: usually in “u” (1U=1.75 inches), and the common heights are 1U, 2U, 4U, etc.
High-density deployment: Allows centralized deployment of a large number of servers in a limited space.
Modular design: easy to maintain and upgrade hardware components.
Centralized management: Support remote management functions, such as IPMI, iDRAC, iLO, etc.
Efficient heat dissipation: An optimized heat dissipation scheme for the cabinet environment
According to different application scenarios, rack servers can be divided into general-purpose, storage-optimized, computation-intensive, and high-density types to meet different business needs.
Key purchase factors of a rack server
1. Size and shape specifications
The size selection of rack servers for sale directly affects the deployment density and scalability of data centers.
1U server: thinnest in height, suitable for space-sensitive scenarios such as network edge and Web hosting, but with limited scalability.
2U server: Balances space and scalability, can accommodate more hard disks and expansion cards, and is suitable for most enterprise applications.
4U and above: provide maximum scalability, suitable for high-performance computing, large storage arrays, and other needs.
Suggestion: Choose the appropriate size according to the cabinet space, heat dissipation capacity, and future expansion plan of the data center. For new data centers, 2U rack servers for sale are usually a safe and flexible choice.
2. Processor configuration
The CPU is the core of server performance. At present, there are two camps: Intel Xeon and AMD EPYC.
Intel Xeon Scalable: mature ecosystem, wide compatibility, and excellent single-threaded performance.
AMD EPYC: The number of cores has obvious advantages, high cost performance, and more PCIe channels.
Core considerations:
Number of cores: Video processing, virtualization, and other scenarios need more cores.
Clock frequency: Database and other applications prefer a high main frequency.
Cache size: affecting data processing efficiency
TDP (Thermal Design Power Consumption): It is related to heat dissipation requirements and operating costs.
Recommended configuration: General service can choose mid-range 16–24 core processors; High-performance CPU with 32 cores or above is recommended for key applications such as virtualization and database.
3. Memory capacity and specifications
Memory configuration directly affects multitasking ability and virtualization performance.
Capacity: It is recommended to start at least 128GB for modern enterprise applications and 256GB+ for a virtualized environment.
Type: DDR4 is still the mainstream, and DDR5 is becoming popular, providing higher bandwidth.
Number of channels: Make sure to make full use of the CPU memory controller (usually 4–8 channels per CPU).
ECC support: Enterprise applications must be equipped with error-checking memory.
Extension suggestion: Choose a motherboard with enough slots for future upgrades. Memory speed should be balanced with CPU compatibility.
4. Rack servers for sale, Storage subsystem
Storage configuration needs to balance capacity, performance, and data protection requirements:
Hard disk type:
HDD: large capacity and low cost, suitable for cold data.
SSD: High performance, suitable for hot data and random I/O intensive applications.
NVMe: Ultra-high performance, extremely low latency
RAID configuration:
RAID1/10: High Performance+Redundancy
RAID5/6: Balancing Capacity and Security
A hardware RAID card is superior to a software scheme.
Expansibility: the number of front hot-swappable disks, back-end expansion options.
Recommended scheme: adopt a hierarchical storage strategy, use SSD for the system disk, and choose SSD or HDD for the data disk according to access frequency. Key business configuration: hardware RAID card.
5. Network connection
Network performance is very important for modern applications:
On-board network card: at least dual-port 1GbE, 10GbE has gradually become the new standard.
Expansion option: PCIe slot supports adding high-speed network cards (25/40/100GbE).
Remote management: A Dedicated management port (iDRAC/iLO/IPMI) is essential.
Fibre Channel: SAN environment requires HBA card support.
Best practice: Configure at least a 10GbE network for virtualization and cloud environment, and consider redundant links. High-performance computing may require RDMA support.
6. Rack servers for sale, Power supply, and redundancy
Power configuration affects system reliability and energy efficiency.;
80 PLUS certification: choose a gold or platinum high-efficiency power supply.
Redundant configuration: A 1+1 or 2+1 redundant power supply is recommended for critical business.
Power capacity: select the appropriate wattage according to the configuration (usually 500W-2000W).
HVDC: Some data centers use a 240V or HVDC power supply.
Energy-saving suggestion: Choose a power module that matches the load to avoid long-term low-load operation (efficiency decline).
7. Management and maintenance features
Good management function greatly reduces the complexity of operation and maintenance.
Out-of-band management: remote control independent of operating system (iDRAC/iLO/IPMI)
Health monitoring: real-time monitoring of temperature, fan, and voltage.
Centralized firmware management: batch update capability
Tool chain support: the ability to integrate with existing management platforms
Key points of purchase rack servers for sale: verify whether the management function meets the team’s skill level and the existing tool chain requirements.
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