How many do i need to make a full circle?

9, but you'll need a 12' square room to put them in and there will be a 13" gap between the final two monitors (which will leave you just enough space to walk in sideways)

Anyone knows if mac book pro supports such resolution?

I can report this works with an M1 Mac as well over USB C - power, displayed at 5120x1440 resolution and 60hz, and USB devices plugged into the monitor connected to the MacBook Pro as well.

Is this a good monitor for business apps (microsoft office, quicken, quickbooks, tax preparation, etc.), or is it designed primarily for gaming?

This monitor is excellent if you need to have multiple documents open and visible at one time. Definitely has increased productivity.

what video card would be needed to drive this?

I have ran in on intel integrated graphics and had no issue. If you are gaming I would recommend an Nvidia 1060 or better.

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Samsung Business C49J890DKN, CJ890 Series 49 inch 3840x1080 Super Ultra-Wide Desktop Monitor for Business, 144 Hz, USB-C, HDMI, DisplayPort, 3-Year Warranty

Samsung Business C49J890DKN, CJ890 Series 49 inch 3840x1080 Super Ultra-Wide Desktop Monitor for Business, 144 Hz, USB-C, HDMI, DisplayPort, 3-Year Warranty

Product ID: 76994611

Details

Brand
Samsung
Screen Size
49 Inches
Resolution
3840 x 1080
Aspect Ratio
32:9
Screen Surface Description
Glossy

⚡144Hz ultra-smooth refresh rate

🔌Dual USB-C with KVM switch

🖥️49-inch super ultra-wide 32:9 display

Description

🚀 Elevate your workspace with panoramic precision and seamless control!

PANORAMIC POWERHOUSE - Massive 49-inch 3840x1080 ultra-wide screen for ultimate multitasking and immersive workflows.
ERGONOMIC COMMAND CENTER - Fully adjustable stand with height, swivel, and tilt to customize your perfect productivity posture.
FLUID VISUALS ZERO BLUR - 144Hz refresh rate ensures buttery-smooth motion, perfect for fast-paced business presentations and dynamic content.
FUTURE READY CONNECTIVITY - Dual USB-C ports plus HDMI and DisplayPort keep your devices plugged in and powered with minimal clutter.
SEAMLESS MULTI DEVICE CONTROL - Integrated KVM switch lets you effortlessly toggle between two computers using one keyboard and mouse setup.

The Samsung CJ890 Series 49-inch Super Ultra-Wide Monitor delivers a stunning 32:9 curved VA panel with 3840x1080 resolution and a blazing 144Hz refresh rate. Designed for business pros, it features dual USB-C ports with an integrated KVM switch to control two PCs from one setup, plus an ergonomic adjustable stand. Backed by a 3-year warranty, this monitor transforms your desktop into a powerhouse multitasking hub.

Specifications

ASIN	B07CS4KF7J
Adaptive Sync	FreeSync
Additional Features	Blue Light Filter, Curved, Frameless, Ultrawide Screen, Wall Mountable
Aspect Ratio	32:9
Best Sellers Rank	#562,002 in Electronics ( See Top 100 in Electronics ) #10,819 in Computer Monitors
Brand	Samsung
Brightness	300 cd/m²
Connectivity Technology	USB
Contrast Ratio	3000:1
Customer Reviews	4.3 out of 5 stars 845 Reviews
Display Resolution Maximum	3840 x 1080
Display Technology	LCD
Display Type	LCD
Global Trade Identification Number	00887276260167
Hardware Connectivity	DisplayPort, HDMI, USB Type C
Image Contrast Ratio	3000:1
Included Components	Monitor
Item Dimensions D x W x H	15"D x 47.4"W x 20.7"H
Item Type Name	Desktop Business Monitor
Item Weight	33.3 pounds
Manufacturer	Samsung Electronics
Model Name	CJ890
Model Number	LC49J890DKNXZA
Mounting Type	Wall Mount
Native Resolution	3840x1080
Number of Component Outputs	2
Picture Quality Enhancement Technology	Eye Saver Mode, Flicker Free
Power Consumption	62 watts
Refresh Rate	144 hertz
Resolution	3840 x 1080
Response Time	5 milliseconds
Screen Finish	Glossy
Screen Size	49 inches
Screen Surface Description	Glossy
Shape	Rectangular
Specific Uses For Product	Business, Gaming, Multimedia
Total Number of HDMI Ports	1
Total USB 3.0 Ports	3
Total Usb Ports	3
UPC	887276260167
Viewing Angle	178 degrees
Voltage	110 volts
Warranty Description	3 year manufacturer, ship-in service, Dedicated B2B call center, Extended warranties available

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