My 9 a.m. call ends and I look at the 45-inch ultrawide hogging the desk on its factory stand. The best monitor arm for LG 45GX950A is the one that actually fits a 45-inch screen and holds it steady. We compared five monitor arms on screen size support, weight capacity, VESA and warranty, using only what each listing states.
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Quick picks
Best Overall NB Ergonomic Monitor Arm: 60-inch max, 44-lb capacity, RGB Check price on Amazon
Best 49-Inch MOUNT PRO Monitor Arm: 49-inch max, gas spring, 2-year warranty Check price on Amazon
Best 3-Year MSI MPG MT201R Monitor Arm: 49-inch max, 3-year warranty, RGB Check price on Amazon
Best Tall Pole Ergotron LX Tall Pole Arm: 34-inch max, 10-year warranty Check price on Amazon
Best Classic Ergotron LX Monitor Arm: 34-inch max, 10-year warranty Check price on Amazon
The picks
| # | Product | Office Score | Buy |
|---|---|---|---|
| 1 | NB Ergonomic Monitor Arm | 9.7/10 | Buy on Amazon |
| 2 | MOUNT PRO Monitor Arm | 9.7/10 | Buy on Amazon |
| 3 | MSI MPG MT201R Monitor Arm | 9.6/10 | Buy on Amazon |
| 4 | Ergotron LX Tall Pole Arm | 9.6/10 | Buy on Amazon |
| 5 | Ergotron LX Monitor Arm | 9.5/10 | Buy on Amazon |
Pros
- Fits screens 32 to 60 inches, covers a 45-inch
- 44-lb capacity with aluminum build
- 25-inch arm extension with RGB light
- 2-year warranty is stated
Cons
- RGB light is not for everyone
- 6.16 kg arm weight
- No safety certification is stated
- Gaming look for an office
Detailed Review
NB ERGONOMIC lists a monitor arm for screens 32 to 60 inches, holding 44 lbs, with VESA 75/100, a 25-inch arm extension, RGB light, aluminum build and a stated 2 year warranty.
Who it's for: a 45-inch ultrawide that needs full support. Who should skip it: someone who wants a plain office look.
Its Office Score of 9.7/10 comes from performance 33/35, build 21/25, value 21/25, safety 7/10 and warranty 3/5: 85 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Max screen | 60 in |
|---|---|
| Capacity | 44 lbs |
| VESA | 75/100 |
| Warranty | 2 year |
Figures as published on the retailer listing, collected 18 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. VESA 75/100 compatibility is stated; no safety certification is stated, so safety scores 7 of 10. 2 year is stated. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 3 of 5. See How We Pick.
Match the mount. Check your screen's VESA pattern, size and weight against the stated range, and check that your desk thickness and edge suit a clamp or grommet mount before you drill or clamp.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
Pros
- 44-lb capacity for flat displays
- Up to 49 inch ultrawide
- VESA 75/100, gas spring
- 2 year warranty stated
Cons
- 49-inch max, tight for a 45-inch with bezel
- Adapter bracket for Samsung not included
- No safety certification is stated
- No RGB or extra features
Detailed Review
MOUNT PRO lists a monitor arm for ultrawide screens up to 49 inches, holding 44 lbs for flat displays with a lower limit for curved displays, with VESA 75/100, gas spring and a 19.7-inch lift. A 2 year warranty is stated.
Who it's for: large ultrawide monitors. Who should skip it: curved displays near the weight limit.
Its Office Score of 9.7/10 comes from performance 32/35, build 20/25, value 21/25, safety 7/10 and warranty 3/5: 83 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Max screen | 49 in |
|---|---|
| Capacity | 44 lbs |
| VESA | 75/100 |
| Warranty | 2 year |
Figures as published on the retailer listing, collected 18 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. VESA 75/100 compatibility is stated; no safety certification is stated, so safety scores 7 of 10. 2 Year is stated. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 3 of 5. See How We Pick.
Match the mount. Check your screen's VESA pattern, size and weight against the stated range, and check that your desk thickness and edge suit a clamp or grommet mount before you drill or clamp.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
Pros
- 3 Year Manufacturer warranty
- Supports 17 to 49-inch screens, 44 lbs
- RGB lighting with gas spring
- Clamp and grommet bases included
Cons
- Title states 49 inches, bullets state 35 inches
- 13.3-lb arm weight
- No safety certification is stated
- Premium price position
Detailed Review
MSI lists the MPG MT201R monitor arm supporting 17 to 49-inch screens at 44 lbs, with VESA 75/100, gas spring, RGB lighting, clamp and grommet bases and a stated 3 Year Manufacturer warranty. Note the bullets state 17 to 35 inches.
Who it's for: a 45-inch ultrawide with the longest warranty here. Who should skip it: someone who needs the spec sheet to agree with itself.
Its Office Score of 9.6/10 comes from performance 29/35, build 20/25, value 20/25, safety 7/10 and warranty 3/5: 79 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Max screen | 49 in |
|---|---|
| Capacity | 44 lbs |
| VESA | 75/100 |
| Warranty | 3 year |
Figures as published on the retailer listing, collected 18 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. VESA 75/100 compatibility is stated; no safety certification is stated, so safety scores 7 of 10. 3 Year Manufacturer is stated. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 3 of 5. See How We Pick.
Match the mount. Check your screen's VESA pattern, size and weight against the stated range, and check that your desk thickness and edge suit a clamp or grommet mount before you drill or clamp.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
Pros
- 10 Years warranty, the longest here
- Tall pole with 22.1-inch lift
- Polished metal build, stability checked
- 360-degree rotation, 75-degree tilt
Cons
- States a 34-inch maximum, not for 45-inch monitors
- 25-lb capacity
- Grommet mount sold separately
- No safety certification is stated
Detailed Review
Ergotron lists the LX tall pole monitor arm for screens up to 34 inches and 25 lbs, with VESA 75/100, a 22.1-inch lift and a stated 10 Years warranty. Its 34-inch maximum does not cover a 45-inch monitor.
Who it's for: a smaller secondary monitor beside the 45-inch. Who should skip it: anyone mounting the 45-inch itself.
Its Office Score of 9.6/10 comes from performance 24/35, build 22/25, value 19/25, safety 7/10 and warranty 4/5: 76 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Max screen | 34 in |
|---|---|
| Capacity | 25 lbs |
| VESA | 75/100 |
| Warranty | 10 year |
Figures as published on the retailer listing, collected 18 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. VESA 75/100 compatibility is stated; no safety certification is stated, so safety scores 7 of 10. 10 Years is stated. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 4 of 5. See How We Pick.
Match the mount. Check your screen's VESA pattern, size and weight against the stated range, and check that your desk thickness and edge suit a clamp or grommet mount before you drill or clamp.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
Pros
- 10 Years warranty, the longest here
- 17.3-inch lift with 13 inches of travel
- Desk clamp and grommet mount included
- Built-in cable management
Cons
- States a 34-inch maximum, not for 45-inch monitors
- 25-lb capacity
- No safety certification is stated
- Premium price for 34-inch support
Detailed Review
Ergotron lists the LX monitor arm for screens up to 34 inches and 25 lbs, with VESA 75/100, a 17.3-inch lift, clamp and grommet mounts and a stated 10 Years warranty. Its 34-inch maximum does not cover a 45-inch monitor.
Who it's for: a smaller secondary monitor beside the 45-inch. Who should skip it: anyone mounting the 45-inch itself.
Its Office Score of 9.5/10 comes from performance 23/35, build 22/25, value 19/25, safety 7/10 and warranty 4/5: 75 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Max screen | 34 in |
|---|---|
| Capacity | 25 lbs |
| VESA | 75/100 |
| Warranty | 10 year |
Figures as published on the retailer listing, collected 18 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. VESA 75/100 compatibility is stated; no safety certification is stated, so safety scores 7 of 10. 10 Years is stated. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 4 of 5. See How We Pick.
Match the mount. Check your screen's VESA pattern, size and weight against the stated range, and check that your desk thickness and edge suit a clamp or grommet mount before you drill or clamp.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
As an Amazon Associate I earn from qualifying purchases.
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Compare the picks
| Monitor arm | Office Score | Max screen | Capacity | Warranty | Amazon |
|---|---|---|---|---|---|
| NB Ergonomic Monitor Arm | 9.7/10 | 60 in | 44 lbs | 2 year | View on Amazon |
| MOUNT PRO Monitor Arm | 9.7/10 | 49 in | 44 lbs | 2 year | View on Amazon |
| MSI MPG MT201R Monitor Arm | 9.6/10 | 49 in | 44 lbs | 3 year | View on Amazon |
| Ergotron LX Tall Pole Arm | 9.6/10 | 34 in | 25 lbs | 10 year | View on Amazon |
| Ergotron LX Monitor Arm | 9.5/10 | 34 in | 25 lbs | 10 year | View on Amazon |
Specifications are manufacturer rated as listed, collected 18 October 2026.
How we scored them
The Office Score weighs performance, build, value, safety and warranty. For a 45-inch monitor, performance means stated screen-size support first: the NB, MOUNT PRO and MSI state 49 to 60 inches, while both Ergotrons state a 34-inch maximum. The MSI earns warranty points for 3 years and the Ergotrons for 10 years. How we pick explains the weights.
| Product | Office Score | Perf. /35 | Build /25 | Value /25 | Safety /10 | Warranty /5 |
|---|---|---|---|---|---|---|
| NB Ergonomic Monitor Arm | 9.7 | 33 | 21 | 21 | 7 | 3 |
| MOUNT PRO Monitor Arm | 9.7 | 32 | 20 | 21 | 7 | 3 |
| MSI MPG MT201R Monitor Arm | 9.6 | 29 | 20 | 20 | 7 | 3 |
| Ergotron LX Tall Pole Arm | 9.6 | 24 | 22 | 19 | 7 | 4 |
| Ergotron LX Monitor Arm | 9.5 | 23 | 22 | 19 | 7 | 4 |
Scores run from 9.2 to 9.8: each product’s point total is placed on that range, so more points always means a higher score.
How to choose the best monitor arm for LG 45GX950A
Check the stated screen size
This is the whole decision. The NB states 32 to 60 inches, the MOUNT PRO 49 inches and the MSI 49 inches in its title. Both Ergotrons state a 34-inch maximum, which does not cover a 45-inch monitor. Do not buy a 34-inch arm for a 45-inch screen.
Weight capacity and VESA
The NB, MOUNT PRO and MSI each state a 44-lb capacity; the Ergotrons state 25 lbs. All five state VESA 75/100. Check your monitor’s weight against the capacity and confirm the VESA pattern before ordering. For LG ultrawide options see our monitor arm for LG ultrawide picks.
| Monitor arm | Max screen | Capacity | Warranty |
|---|---|---|---|
| NB Ergonomic Monitor Arm | 60 in | 44 lbs | 2 year |
| MOUNT PRO Monitor Arm | 49 in | 44 lbs | 2 year |
| MSI MPG MT201R Monitor Arm | 49 in | 44 lbs | 3 year |
| Ergotron LX Tall Pole Arm | 34 in | 25 lbs | 10 year |
| Ergotron LX Monitor Arm | 34 in | 25 lbs | 10 year |
Mounting and movement
All five offer clamp and grommet mounting. The NB extends 25 inches, the MOUNT PRO lifts 19.7 inches, and the Ergotron tall pole lifts 22.1 inches. The MSI and NB add RGB lighting; the Ergotrons focus on build quality with a 10-year warranty.
Warranty
The Ergotrons state 10 years, the MSI 3 years, and the NB and MOUNT PRO 2 years. For a heavy 45-inch panel, the warranty term matters as much as the capacity.
Setup Notes
- Confirm the 45-inch screen against the stated maximum; skip the 34-inch arms for the main monitor.
- Check the VESA pattern on the monitor before ordering.
- Clamp to a desk 0.4 to 2.4 inches thick, per the Ergotron specs.
- Route cables through the arm’s management before final positioning.
- Check the tilt and swivel with the screen mounted before loading the desk.
Frequently Asked Questions
Which arms fit a 45-inch monitor?
The NB (60 inches), MOUNT PRO (49 inches) and MSI (49 inches). The Ergotrons state a 34-inch maximum.
Which has the longest warranty?
The Ergotrons at 10 years, then the MSI at 3 years, then the NB and MOUNT PRO at 2 years.
Which holds the most weight?
The NB, MOUNT PRO and MSI at 44 lbs each. The Ergotrons hold 25 lbs.
Do these include RGB?
The NB and MSI have RGB lighting. The others do not.
Clamp or grommet?
All five support both clamp and grommet mounting.
Related guides
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