Economy Desktop PCIe 3.0 x8 (64Gbps) upstream port PCI-Express expansion enclosure design for expansion up to 4* PCIe Gen3 slots

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.

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 12x12 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. Download
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
Note:
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.
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