The catch
Dell UltraSharp 32 4K Thunderbolt Hub Monitor
Compared with the 27-inch UltraSharp, the 31.5-inch panel takes up more desk width.
Side by side
Go with the U3225QE for 120Hz motion and a more capable Thunderbolt desk hub. Where 60Hz and 90W charging are enough for a MacBook-focused workspace, the MA320U suits.
Before you buy
About 139.9 pixels per inch is what U3225QE works out to, against 139.9 for MA320U. Their pixel densities are close enough that layout and connection needs separate them more strongly.
Where this comes from
Pixels per inch = √(width² + height²) / diagonal. The inputs are 3840 × 2160 at 31.5 inches and 3840 × 2160 at 31.5 inches. Because the diagonals are published nominal values, these figures are approximate.
The catch
Compared with the 27-inch UltraSharp, the 31.5-inch panel takes up more desk width.
The catch
A 120Hz work monitor feels smoother than its 60Hz ceiling.


We may earn a commission from qualifying Amazon purchases. How we make money
120Hz motion and a more capable Thunderbolt desk hub point to the U3225QE. A MacBook-focused workspace where 60Hz and 90W charging are enough suits the MA320U.
Workspace on screen is the same size
Which one fits
Compared with MA320U at 90 W, U3225QE offers up to 140 W laptop power and a Thunderbolt-centered hub. The negotiated power profile has to be supported by the laptop and cable.
The MacBook-focused control workflow is what MA320U targets. Whether its 4K 60 Hz panel and 90 W power ceiling suit the intended Mac and connected accessories needs checking.
BenQ stops at 60 Hz, whereas Dell reaches 120 Hz. The requested 4K timing has to be supported by the computer and the selected connection.
In MA320U, 4K resolution and up to 90 W USB-C charging come together. Dell has the same native resolution, so BenQ gives up no pixels when 60 Hz is sufficient.
In practice
About 139.9 pixels per inch is what U3225QE works out to, against 139.9 for MA320U. Their pixel densities are close enough that layout and connection needs separate them more strongly.
Pixels per inch = √(width² + height²) / diagonal. The inputs are 3840 × 2160 at 31.5 inches and 3840 × 2160 at 31.5 inches. Because the diagonals are published nominal values, these figures are approximate.
Per frame, U3225QE draws 8.3 million native pixels and MA320U 8.3 million. Refresh ceilings are 120Hz and 60Hz respectively.
Native pixels = width × height. Refresh interval =1000 / Hz, which gives 8.3 and 16.7 ms. These calculations concern signal and cadence and are not measured frame rates, input lag or pixel response.
While resolution and diagonal stay equal, the stated USB-C power ceiling rises from 90W to 140W.
140 - 90 = 50W. At 31.5 inches, both panels are 3840 × 2160. Charging in practice depends on the negotiated host and cable support.

Dell, U3225QE
On a desk where you want fewer separate boxes, this larger 4K work screen offers 120Hz scrolling, 140-watt charging and a Thunderbolt hub.

BenQ, MA320U
MacBook users get 90-watt charging and familiar brightness controls from this roomy matte 4K display, and no Thunderbolt dock is needed.
Spec by spec
| Spec | Dell UltraSharp 32 4K Thunderbolt Hub Monitor | BenQ MA Series 32-inch 4K Monitor for MacBook | In practice |
|---|---|---|---|
| Native resolution | 3840 × 2160 | 3840 × 2160 | Usable logical workspace changes with operating-system scaling. |
| Panel diagonal | 31.5 in | 31.5 in | The measured active diagonal may differ slightly from a nominal screen class. |
| Maximum refresh | 120Hz | 60Hz | Look at the exact input, resolution and overclock conditions. |
| Panel technology | IPS Black | IPS | A measured color or motion winner is not established by panel type alone. |
| Laptop power | Up to 140W | Up to 90W | For the desired delivery, the host, cable and negotiated power profile all have to support it. |
| Chassis width | 713.2 mm | 714.5 mm | Leave additional room for cables, arms and neighboring equipment. |
| Stand depth | 214.88 mm | 220.2 mm | More desk depth can be taken by the included stand than by the display cabinet. |
Trade-offs
Decision guide
The U3225QE is for 120Hz motion and a more capable Thunderbolt desk hub, and the MA320U is for a MacBook-focused workspace where 60Hz and 90W charging are enough.
31.5-inch 3840 by 2160 panels are used in both. The Dell brings neither more pixels nor a larger canvas, so any extra value has to come from refresh rate and connectivity.
Up to 140W is what Dell advertises, and BenQ advertises 90W. The laptop, cable and negotiated power profile all have to support the offered level. A gaming laptop may still need its own charger.
Widths come to about 713 and 715 mm. Stand depth is about 215 mm on the Dell and 220 mm on the BenQ, so neither saves a dramatic amount of desk space.
By the numbers
What we found across the computer monitors we compare, plus the checked facts behind each finding.
This guide keeps all 50 models in play. The pick rests on the facts and trade-offs on this page.
50 models fit, out of 50 checkedDell UltraSharp 32 4K Thunderbolt Hub Monitor lists 120 Hz for top refresh rate, 100% more than the 60 Hz on BenQ MA Series 32-inch 4K Monitor for MacBook.
How we countedNo needs are preselected here. Open the matcher and add the ones that apply to your home, room or setup.
How we calculatedFigures use the fastest published refresh mode. Resolution, connection and color settings decide when you get that rate. For context, 44 of 50 models publish comparable figures.
| Product | Needs it meets | Facts we checked | Sources |
|---|---|---|---|
| Dell UltraSharp 32 4K Thunderbolt Hub Monitor | None of these needs is a documented match |
|
|
| BenQ MA Series 32-inch 4K Monitor for MacBook | None of these needs is a documented match |
|
|
Ready to buy
Open either model on Amazon for the current price, customer reviews and delivery options.

Run a high-power laptop along with desk peripherals
See price & reviews on Amazon
Like Mac-focused controls
See price & reviews on AmazonEach link opens in a new tab.
We may earn a commission from qualifying Amazon purchases. How we make money