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Item#: N82E16816110054

ASUS RS520-E6/ERS8 2U Rackmount Server Barebone Dual LGA 1366 Intel 5500 DDR3 1333/1066

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  • Dual LGA 1366
  • Dual Intel Xeon 5600/5500 Series
  • 12 x 240Pin Memory Slots
  • 770W (80+) 1+1 Redundant Power Supply (Default with one Power Supply Module)

  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

Asus packs a lot of power into a small package with the RS520-E6/ERS8 server barebones system. It is based on the Intel 5500 chipset and will accept up to 2 Intel Xeon 5500/5600 series processors. To support all the processing power you can install up to 96GB ECC registered or 48GB unbuffered DDR3 1066/1333MHz memory.

This system has been certified to support VMWare virtualization applications, helping small to medium sized business reduce TOC and simplify central management. An onboard vertical USB connector lets you connect a USB flash drive and load the VMWare hypervisor off flash memory for faster deployment of new servers. Three PCIe slots allow for flexible expansion later on and another slot for optional PIKE cards brings seamless upgrade to SAS storage. The motherboard has 6 SATA II ports and supports flexible RAID configurations for better data protection. Eight hot-swap drive bays let you change out drives as needed.

All this fits into a slim 2U chassis. The whole thing is powered by a 1+1 770W redundant power supply so the system will get all the power that it needs. ASUS EPU technology delivers system-wide power efficiency by intelligently adjusting power in real time to ensure the best power management.

  • newegg Dual Intel Xeon 5500 Series Processors Support With dual LGA 1366 sockets, the Asus RS520-E6/ERS8 supports up to two multi-core Intel Xeon 5500/5600 Series processors, providing the computing platform capability necessary for your increasing computing demand.
  • newegg Scalable DDR3 Memory Twelve 240-pin DIMM sockets support both registered (RDIMM) and unbuffered (UDIMM) DDR3 memory at speeds of 1066 and 1333MHz in triple channel, ensuring ample capacity for any application.
  • newegg Eight 3.5” Hot-swap HDD Bays The Asus RS520-E6/ERS8 has eight 3.5” hot-swap HDD bays to support SATA or SAS HDDs, meeting the demand of mass storage. The hot-swap design is reliable for 7x24 non-stop services. Onboard SATA controller and Asus optional PIKE upgrade kit offers flexible RAID choices.
  • newegg Flexible I/O Expandability The Asus RS520-E6/ERS8 provides a total of four I/O expansion slots in the 1U chassis, including one PCI-E 2.0 x4 link slot, two PCI-E 2.0 x8 link slots, and an additional slot for optional ASUS PIKE upgrade kit which brings seamless upgrade to SAS storage with RAID protection.
  • newegg Virtualization Ready The onboard vertical USB connector for VMware ESXi supports virtualization applications in the RS520-E6/ERS8, helping improve the server’s utility rate and manageability and reducing the total cost of ownership.
  • newegg Power Efficiency With 80+ PFC high efficiency power supply, the Asus RS520-E6/ERS8 is able to reduce the power loss and power consumption, and save power bill for users. Asus exclusive EPU (Energy Processing Unit) technology digitally monitors the CPU power and intelligently scales power up and down according to the work load for extreme energy efficiency.

Learn more about the ASUS RS520-E6/ERS8



CPU Supported

CPU Type
Dual Intel Xeon 5600/5500 Series
CPU Socket
Dual LGA 1366


North Bridge
Intel 5500
South Bridge

Memory Supported

Memory Slots
12 x 240Pin
Max Memory Supported
Memory Type Supported
DDR3 1333/1066

Storage Supported

Serial ATA
6 x SATA 300
Intel Matrix Storage (for Windows only)
(Support software RAID 0, 1, 10 & 5)

LSI MegaRAID (for Linux/Windows)
(Support software RAID 0, 1, 10).


Aspeed AST2050
Video Memory

Expansion Slots

PCI Express
2 PCI-E x8 (Gen2 x8 Link) (FH/FL)
1 PCI-E x4 (Gen2 x4 Link) (FH/HL)


First LAN
Intel 82574L
Second LAN
Intel 82574L
Max. LAN Speed
Dual 10/100/1000Mbps

Expansion Bays

Slim Bays
Hot-Swap Bays
8 x 3.5"

Panel Ports

Front USB
Rear USB

Power Supply

Max. Power
770W (80+) 1+1 Redundant Power Supply (Default with one Power Supply Module)


Six-Core/Quad-Core Intel Xeon X5600/X5500 Series (95W)
Quad-Core Intel Xeon E5600/E5500 Series (80W)
Quad-Core Intel Xeon L5600/L5500 Series (60W/40W/38W)


Form Factor
2U Rackmount

Dimensions & Weight

24.2" x 17.5" x 3.4"
48.5 lbs.
Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 3 years
  • Limited Warranty period (labor): 3 years
  • Read full details
  • Return Policies
    • Return for refund within: Non-refundable
    • Return for replacement within: 30 days
  • This item is covered by's Replacement Only Return Policy.
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