Economy Expansion with up to 4 Dual-Width Pro Cards

The enclosure is designed to have 4 PCIe x16 slots (x8 electrically) on NA250A backplane supporting up to 4 double-width PCIe Gen3 cards, or single-slot PCIe cards. In addition, the enclosure can accommodate all combinations of PCIe 3.0 ×1, ×4, ×8 and ×16 PCIe cards for every application with backward compatibility for Gen2 cards to work with the host computer.

64Gbps Bandwidth – PCIe Gen3 x8

The NA250A PCIe expansion enclosure implements the latest PCIe 3.0 technology and PCIe Gen3 x8 (eight-lane) host interface with 8Gbps throughput per lane, offering blazing-fast data transfer rates of up to 64Gbps between host and expansion enclosure, dedicated for varied professional applications.

Great Sufficient Powering

1200 W




6+2 pin

PCI-E cables

Dedicated 1200W PSU for Varied Applications

Some professional cards require high power wattage for work; considering the hi-power requirement aspect, Netstor has considerately planned a dedicated, high-efficient 1200W power supply unit in the expansion enclosure to allow up to 4 high-performing pro cards to process simultaneously with top reliability and stability.

Supplementary 6+2 pin PCI-E Power Cables

The chassis has been thoughtfully designed to provide extra PCI-E power cables to meet each professional card’s supplementary power requirement. Furthermore, any combinations of 6-pin and 8-pin PCI-E power connectors on each pro card are supported by NA250A.

Extra Card Holders

In view of some high-performance pro card with card length up to 30 cm or so, due to card’s heavier weight and longer length, a special card holder has been deliberately designed close to each PCIe slot for holding the large, heavy card thoroughly and reliably within the expansion enclosure.

Convenient Adjustable Fan Speeds

Equipped with two front large 12×12 cm cooling fan modules with each fan in support of 75 CFM, providing best airflow ventilation to enclosure for most excellent heat dissipation ever, and ensuring pro cards within chassis can run long term without any high temp concern. Moreover, the fan speed of each cooling fan can be adjusted manually according to cards application situation within expansion chassis.

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Form Factor Desktop
Host Interface Up to 64Gb/s external PCIe 3.0 x8
No. of Slot 4* PCI Express 3.0 x8 (x16 connector)
Card Length Available Supports full length,full height PCI Express Cards
LED Display for Enclosure Power-On LED – Blue
FAN normal – green; Fan failure – Red
TEMP normal – green; TEMP Over 55°C – red
Cooling Front: two 120x120x25 mm cooling fans
75 CFM each fan @ full speed
Alarm Buzzer beeping for fan failure or over temperature (over 55°C) occurs
Material Solid metal structure with aluminum housing
Power Supply Model : NA250A-XGPU
Universal Single 1200W (High-Efficiency & Low Noise)
Input: 90~230 VAC/50-60 HZ
12V @ 100A
(Note: 1300W peak power @ 12 seconds)
Dimension 450 (D) x 175.8 (W) x 374 (H) mm
17.7 (D) x 6.9 (W) x 14.7 (H) inch
O.S. support OS Independent
Host Requirement One PCIe 3.0 x8 / x16 slot and system has sufficient PCIe resources
1. The tower MacPro under 10.9 Mavericks and 10.10 Yosemite only supports up to 2 nVidia GPU cards.
2. Now the tower MacPro under 10.11 El Capitan is able to support up to 3 nVidia GPU cards again.


Model No. Description
NA250A-XGPU Desktop PCIe Gen3 Expansion Enclosure, 1200W Single Power Supply with extra 4* PCIe power connectors 6+2 pin & 4* PCIe 6 pin for up to 4 double width GPU cards, with one PCIe Gen3 x8 host adapter and one PCIe x8 cable
NP960A-H Extra PCIe Gen3 x8 Host Adapter(full height & half Length)
AAML6815 Extra PCIe 3.0 x8 cable length in 1.5 meter
Product Brand

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