محطات عمل Dell Precision T7920

Chassis and form factor

The 7920 Tower is a full-size chassis: 433 mm high, 218 mm wide and 566 mm deep, starting at 20.4 kg. It can stand under a desk on its handles or go into a 19-inch rack on the optional rail kit, which is the practical route for a render node or a shared compute box in a server room. The front carries four FlexBays and one 5.25-inch FlexBay; with the rear FlexBays and the 5.25-inch bay populated and the MegaRAID 9460-16i controller fitted, the chassis holds up to ten 3.5-inch or 2.5-inch drives. A slimline optical bay option sits next to the 5.25-inch bay, a second 5.25-inch bay kit is available and consumes two FlexBays, and there is an SD slot. The PCIe backplane FlexBay chassis supports one or two M.2 or U.2 NVMe SSDs with one processor and three or four with two. The power supply is externally accessible, tool-less and lockable, and the front bezel can be locked over the FlexBays.

Processors

One or two Intel Xeon Scalable processors, first generation (Skylake-SP) or second generation (Cascade Lake), up to 28 cores per processor, with Intel AVX, Trusted Execution Technology, AES New Instructions, Turbo Boost and optional vPro, on the Intel C621 Lewisburg chipset. Second-generation processors need Red Hat Enterprise Linux 8.0 rather than 7.5 on Linux. The system board carries two LGA3647 sockets; the configured units we list include a Xeon Gold 6148 20-core build, and processor options for a new build come from our processors range.

More than on any other model in the family, the second processor decides what the T7920 can do:

Memory

Twenty-four DDR4 ECC DIMM slots, twelve per processor on six channels each. This is double the T7820's slot count and the reason the T7920 reaches memory sizes the smaller towers cannot.

Memory speed is set by the processor installed, and the 3 TB figure applies only with processor SKUs that support it, so a 3 TB build starts with the processor choice, not the modules. Populate all six channels on each processor with identical modules. DDR4 RDIMMs and LRDIMMs are stocked under server memory; send the processor model and target capacity and we will confirm the module type.

Graphics

Four PCIe x16 Gen 3 graphics slots with a 900 W graphics budget: up to three double-width 300 W cards in three slots on a dual-processor system, and up to two 375 W cards where such cards are offered. Dell recommends 220 VAC input for 900 W configurations, which Qatar's 240 V mains provides. Cards named in the 7920 Tower datasheet:

Three Quadro RTX 8000 or RTX 6000 class cards in one tower is what separates this model from the T7820, which stops at two cards and 600 W. Professional cards are listed under graphics cards.

Storage

Front FlexBays hold up to four 2.5-inch or 3.5-inch SATA drives on the integrated Intel controller, or up to eight once the rear FlexBays are populated. With the rear FlexBays and the 5.25-inch bay (two 2.5-inch or 3.5-inch drives) in use and the optional Broadcom MegaRAID 9460-16i controller fitted, the total rises to ten SATA or SAS drives. On the PCIe backplane chassis up to four hot-plug M.2 or U.2 NVMe SSDs fit in the FlexBays: more than two on the Intel controller requires two processors, while the MegaRAID 9460 NVMe option runs four with a single processor. Up to eight M.2 NVMe SSDs go on two Ultra-Speed Drive Quad x16 cards, the second card requiring dual processors; RAID 0 and 10 can span both cards but cannot hold the boot drive. Total capacity reaches 136 TB.

The integrated Intel chipset SATA controller has eight 6 Gb/s ports plus one for an optical drive, with Intel RSTe software RAID 0, 1, 5 and 10. Intel NVMe RAID 0 and 1 through the vROC activation key applies to the first two front drives only; RAID 0, 1 and 10 is available on the first Ultra-Speed Drive Quad card. The optional MegaRAID SAS 9440-8i provides eight 12 Gb/s SAS ports with software RAID 0, 1, 5, 10, and the MegaRAID SAS 9460-16i adds sixteen ports, a 4 GB cache with flash and supercapacitor backup and hardware RAID 0, 1, 5, 10, with the NVMe option covering four front drives. We stock SAS, SATA and NVMe drives for it; the ten-drive layout depends on the 9460-16i, so tell us the controller before ordering a full set.

Expansion slots and ports

All slots are PCIe Gen 3: two x16 slots, two further x16 slots that become active with the second processor, one open-ended x8, one x16 wired as x4 and one x16 wired as x1. Unlike the T7820, no legacy PCI slot is listed. Networking is two integrated Gigabit Ethernet controllers, Intel i219 and i210, giving two RJ45 ports at the rear, with Remote Wake Up, PXE and jumbo frame support. Optional cards are the Intel i210 single-port gigabit adapter, the Intel X550-T2 dual-port 10GbE adapter, an Intel Dual Band Wireless-AC 8265 module with Bluetooth and an Aquantia AQN-108 2.5 and 5 GbE single-port adapter. Also optional: a two-port Thunderbolt 3 card with DisplayPort pass-through, a two-port USB 3.1 Gen 2 Type-C card, Teradici PCoIP remote host cards and a serial port card.

• Front: 2 x USB 3.1 Gen 1 Type-A, 2 x USB 3.1 Type-C, universal audio jack
• Rear: 6 x USB 3.1 Gen 1 Type-A, serial, 2 x RJ45, 2 x PS/2, audio line out, audio line in/microphone
• Internal: 1 x USB 2.0 Type-A, one 2 x 5 USB 2.0 header, 8 x SATA 6 Gb/s plus 1 for an optical drive

Audio is the integrated Realtek ALC3234 codec with an internal speaker. Management is Intel AMT or vPro with DASH support and Dell Command Suite; TPM 2.0 is standard.

Power supply

One 1400 W supply, 90 percent efficient and 80 PLUS Gold certified, externally accessible, removable and lockable. Its input range is 181 to 240 VAC, so unlike the 950 W supply in the T7820 and T5820 it is not a universal-voltage unit; it is designed for 230 V regions such as Qatar. The 1400 W rating is what makes the 900 W graphics budget, two processors and ten drives possible in one enclosure.

Physical specification

Supported operating systems

Dell's datasheet lists Windows 10 Pro for Workstations (up to four cores, and four cores plus), Red Hat Enterprise Linux 7.5, Red Hat Enterprise Linux 8.0, which is required for second-generation Xeon Scalable processors, and Ubuntu Linux 16.04 and 18.04. Windows 11 and current Linux releases postdate the sheet; ask us to confirm a specific build against Dell's support matrix before you order if certification matters.

Buying a refurbished Dell Precision T7920 from ServerDove

ServerDove lists the T7920 as configured workstations, as a barebone chassis and as parts, including the RN4PJ dual-socket system board and the R5NN8 processor heatsink that a second-processor upgrade needs. Refurbished units are tested before listing and covered by the ServerDove warranty; extended cover can be quoted. Stock is held in Doha, so delivery across Qatar is typically one day, and because the T7920 is heavy and rack-capable we can rack, cable and configure it on site as a service.

Builds are quoted from stock: state the processor pair, memory size, number of graphics cards, drive layout and whether you want the rail kit. If two graphics cards and 768 GB are enough, the smaller Precision T7820 costs less to run and takes less space; the earlier Precision T7910 is the previous-generation large tower. See the whole Dell workstations range, or contact us by WhatsApp on +974 5521 2108, email at sales@serverdove.com or the contact page. Bulk quotations are available for business customers.