NVIDIA RTX A400 and RTX A1000 for four monitors: outputs, maximum resolution and Mosaic

Four monitors on one RTX A400 or RTX A1000

One NVIDIA RTX A400 or one NVIDIA RTX A1000 drives four monitors. Each card has four Mini DisplayPort 1.4a outputs, and NVIDIA's datasheets list four displays at 4096 × 2160 and 120 Hz, or four at 5120 × 2880 and 60 Hz, for both. Four is also the limit of a single card.

Both are single-slot cards of 2.7 in height with 50 W of total board power, a format for the compact workstations that stand under trading, dispatch and control-room desks. They differ in what feeds the screens: 4 GB of memory and one video decoder on the RTX A400, 8 GB and two decoders on the RTX A1000, and an 8K line on the larger card only.

Outputs and maximum resolution card by card

NVIDIA datasheets: RTX A400 (3279761, May 2024), RTX A1000 (April 2024), RTX 2000E Ada Generation (4328932, October 2025), RTX 2000 Ada Generation (2999417, January 2024), RTX PRO 2000 Blackwell (5322351, June 2026).

The resolution lines of a card are alternatives and do not add up. An RTX A1000 drives four displays at 4096 × 2160 or two at 7680 × 4320, and its 8K line ends at 30 Hz. The datasheet of the RTX A400 prints no 8K line at all. The values of the RTX PRO 2000 come from the multi-monitor footnote of its datasheet, which adds that other configurations may be possible within the available bandwidth.

The fourth output is new in the smallest class. NVIDIA's blog of 16 April 2024 calls the four outputs of the RTX A400 a first for its series. The T400 that NVIDIA measures the card against has three Mini DisplayPort 1.4 outputs, and according to NVIDIA's line card of March 2023 its 4 GB version reaches four displays only through multi-stream transport. A fleet that moves from such cards gains a native fourth port; our article on replacing Quadro P1000, T400 and T1000 cards covers that step.

Mini DisplayPort, cables and what the datasheets leave out

Every output in the table is a Mini DisplayPort, and none of these cards has an HDMI output. A monitor with a full-size DisplayPort input therefore needs a Mini DisplayPort to DisplayPort cable or adapter, one per screen. NVIDIA's documents for the RTX A400 and the RTX A1000 do not say which adapters come with the card. For the RTX 2000 Ada and the RTX PRO 2000, NVIDIA's quick start guides list one such adapter in the box. With four monitors the cables belong in the plan either way.

The datasheets of the two small cards list HDCP 2.2, and the sheet of the RTX A1000 lists DisplayPort with audio. Neither has an HDR line, so we state nothing on HDR. The DisplayPort version is 1.4a on the four cards of the Ampere and Ada generations and 2.1b on the RTX PRO 2000 Blackwell, the one card in the table that lists 165 Hz at 4K on four screens.

We supply the RTX A400 and the RTX A1000 across the EU; send us the number of desks, the monitors and their inputs and we reply with a written quote within one business day.

NVIDIA Mosaic on the RTX A400 and RTX A1000

Mosaic lets an application span several displays as one surface. Both datasheets list NVIDIA Mosaic technology with the footnote "Windows 10 and Linux". NVIDIA's Mosaic user's guide, version 14 of May 2023, names Windows 10, Windows 11 and Linux as operating systems; it predates both cards and names neither, so Mosaic under Windows 11 is a point to confirm on the installed system.

On the number of displays NVIDIA's documents differ: NVIDIA's Mosaic page says up to 16 displays from a single system; its Mosaic user's guide (v14, May 2023) says up to 32 displays with eight GPUs. Per card the figure stays at four.

Going beyond one card takes hardware these two cards do not support. The guide requires NVIDIA's sync card to synchronise Mosaic across two or more GPUs and makes edge overlap, as used for blended projectors, available only with sync-capable GPUs. The RTX A400 and the RTX A1000 are neither on NVIDIA's RTX PRO Sync page of 15 October 2026 nor in the sync table of the 621.14 driver release notes. Plan Mosaic with them as one card with up to four displays, without overlap.

The guide gives three planning hints for a Mosaic grid: all displays on the same type of connection, displays of the same make and model, and a maximum desktop of 16,384 × 16,384 pixels for the GPUs it covers. By our arithmetic four displays of 4096 × 2160 in a row are exactly 16,384 pixels wide. Four displays of 5120 × 2880 in a row come to 20,480 pixels, more than the limit; as a two-by-two grid they make 10,240 × 5,760 and stay inside it. Because the guide does not name these cards, treat the limit as a hint and check the layout on the system.

One line of both datasheets has aged. They name RTX Desktop Manager for arranging windows across monitors, and the release notes of driver 621.14 state that Release 580 was the last branch to support it.

Beyond four displays and the cards for the sync board

NVIDIA's RTX PRO Sync card is, in the words of its user guide of March 2026, a rebranding of the Quadro Sync II card. One sync card connects up to four GPUs and two cards up to eight, the eight GPUs with which the Mosaic guide reaches 32 displays. NVIDIA's RTX PRO Sync user guide gives the rule for the graphics cards it supports as "4000-class and above".

NVIDIA's RTX PRO Sync Solutions page (15 October 2026); NVIDIA RTX Enterprise release notes 621.14, Table 3 (4 November 2026).

For the NVIDIA RTX 5000 Ada Generation and the NVIDIA RTX 4500 Ada Generation the two documents disagree: NVIDIA's datasheet and its RTX PRO Sync page list the card as compatible; the sync table in the 621.14 driver release notes does not. A synchronised wall on those two cards should be confirmed with the driver branch it will run. The workstation row is the NVIDIA RTX PRO 4500 Blackwell Workstation Edition, which the release notes write without its edition; the passive Server Edition is in neither list. Of the cards in this table the NVIDIA RTX PRO 4000 Blackwell is the smallest that both documents name: a full-height single-slot card with 24 GB and four DisplayPort 2.1b outputs at 145 W.

Two of the 16 GB half-height cards carry Mosaic in their datasheets as well. The sheet of the RTX 2000 Ada states that its configuration offers neither frame-lock synchronisation nor display overlap, and the NVIDIA RTX 2000E Ada Generation lists Mosaic for Windows 10 and Linux without a sync line. The datasheet of the RTX PRO 2000 has no Mosaic line; NVIDIA's Mosaic page names the RTX PRO family as a whole.

The card for a market-data desk, a CAD seat, a control room or a video wall

None of the NVIDIA documents we read gives a memory figure per connected display. The memory of the card is sized by what the applications put on the screens, and the makers' pages, read on 10 November 2026, give the figures. We compare memory only: the graphics lines of AutoCAD add a "Bandwidth" value that Autodesk does not define.

• Market data, dispatch and office desks. Many windows of 2D content on four monitors make the outputs the requirement. The 4 GB of the RTX A400 meet the memory figure Adobe names for Photoshop on 4K displays and the one in Autodesk's recommended line for AutoCAD LT 2027.
• CAD on 4K monitors. Autodesk's page for AutoCAD 2027 ties resolutions up to 3840 × 2160 to its recommended display card, for which it names 8 GB. The RTX A1000 meets that memory figure and the RTX A400 does not.
• Control rooms with video streams. The RTX A1000 has two decoders and the RTX A400 one, and both datasheets list AV1 decode. For recording or streaming the desk each card has one encoder with at most 8 concurrent NVENC sessions and no AV1 encoding, as our article on NVENC session limits explains.
• Content above 8 GB. Lumion recommends 10 GB, Twinmotion's high-end tier and Autodesk's table for large datasets start at 12 GB, and DaVinci Resolve Studio 21.2 names 12 GB for background rendering. Three 16 GB cards keep the four Mini DisplayPort outputs: the RTX 2000E Ada in a single slot at 50 W, the RTX 2000 Ada and the RTX PRO 2000 Blackwell in two slots at 70 W.
• 8K screens. Two at 30 Hz on the RTX A1000, two at 60 Hz on the two Ada cards, two at 100 Hz with DSC on the RTX PRO 2000.
• Walls of more than four displays, or projectors with overlap. Sync-capable cards from the table above.

The cards are described on their own pages: RTX A400 specs and buy the RTX A400, RTX A1000 specs and buy the RTX A1000, RTX 2000E Ada specs and buy the RTX 2000E Ada, RTX 2000 Ada specs and buy the RTX 2000 Ada, RTX PRO 2000 Blackwell specs and buy the RTX PRO 2000 Blackwell. The choices between them are worked through in RTX A1000 vs RTX A400, in RTX A1000 vs RTX 2000 Ada vs RTX PRO 2000 and in our comparison of low-profile NVIDIA RTX cards; for CAD seats see our guide to the GPU for CAD workstations.

If a desk needs more than four displays or more than 8 GB, describe the wall and what it shows, and we name the cards for it in a written quote.

Drivers, Windows 10 and Linux on multi-display desks

Both cards run on the NVIDIA RTX Enterprise Production Branch driver and are listed in the newest release of each current branch: 621.14 in R620 (4 November 2026), 597.30 in R595 (22 October 2026) and 582.99 in R580 (21 October 2026) on Windows, and 620.70.06, 595.112.07 and 580.196.07 on Linux. The release notes name Windows 11 from 22H2 to 25H2 and Windows 10 22H2.

Two facts matter for desks that stay on Windows 10. Release 620 is the last driver branch for that system, and NVIDIA's support article 5707, updated on 27 August 2025, describes Windows 10 driver support after October 2025 as a quarterly security update with critical bug fixes. Our guide to the RTX Enterprise driver on Windows 10 and 11 sets out the branches.

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