When shopping for a monitor in Singapore, you will often see ports labelled USB-C, Thunderbolt 3, or Thunderbolt 4. They look the same, the same reversible connector, but they are not interchangeable. Choosing the wrong one can mean buying an expensive monitor that does not work with your laptop at full speed, or paying extra for features you do not need.
This article explains what Thunderbolt and USB-C actually are, how they differ in bandwidth, video support, charging capability, and daisy-chaining, and which type of monitor makes sense for your desk setup in Singapore. We cover real-world prices, local retailers such as Courts, Harvey Norman, Lazada, and Shopee, and specific monitor models available in Singapore.
What is USB-C?
USB-C is a physical connector shape, a 24-pin reversible plug. It does not tell you what speed or protocol runs through it. A USB-C port on a monitor might support only USB 2.0 (480 Mbps) or USB 3.2 Gen 2 (10 Gbps), or it might support DisplayPort Alt Mode or Thunderbolt. The shape alone guarantees nothing.
On monitors sold in Singapore, USB-C ports commonly support DisplayPort Alt Mode, which means the port can carry a video signal alongside data and power. A monitor with USB-C that supports DisplayPort Alt Mode can connect to a laptop with a single cable: video, data (for USB hub ports on the monitor), and power delivery (PD) all in one. This is the main reason people buy USB-C monitors, to reduce cable clutter.
USB-C speeds and standards
- USB 3.2 Gen 1, 5 Gbps. Older standard, still found on budget monitors.
- USB 3.2 Gen 2, 10 Gbps. Common on mid-range monitors.
- USB 3.2 Gen 2x2, 20 Gbps. Rare on monitors, more common on external SSDs.
- USB4, 40 Gbps. Based on Thunderbolt 3 protocol, but not all USB4 ports support Thunderbolt.
For a monitor, the most important factor is whether the USB-C port supports DisplayPort Alt Mode. Without that, you cannot send video over USB-C, you would need a separate HDMI or DisplayPort cable. Most USB-C monitors sold in Singapore do include Alt Mode, but you should check the specifications carefully. For example, the Dell S2722QC (around S$499 at Lazada) has a USB-C port that supports DisplayPort Alt Mode and 65 W power delivery. The LG 27UP600 (around S$399) has USB-C but only for data, video requires HDMI.
What is Thunderbolt?
Thunderbolt is a high-speed interface developed by Intel and Apple. It uses the USB-C connector but adds mandatory features: minimum 40 Gbps bandwidth (Thunderbolt 3 and 4), support for DisplayPort video, PCI Express (PCIe) data tunnelling, and power delivery. Thunderbolt 3 and 4 are backward-compatible with USB-C devices, but a USB-C port cannot act as a Thunderbolt port unless the controller chip supports it.
Thunderbolt 3 vs Thunderbolt 4
Thunderbolt 3 and Thunderbolt 4 both deliver 40 Gbps bandwidth, but Thunderbolt 4 raises the minimum requirements:
- Thunderbolt 3, 40 Gbps, supports two 4K displays or one 5K display. PCIe data at 16 Gbps minimum. Power delivery up to 100 W.
- Thunderbolt 4, 40 Gbps, supports two 4K displays or one 8K display. PCIe data at 32 Gbps minimum. Power delivery up to 100 W. Must support wake from sleep and Intel VT-d for security.
For monitors, Thunderbolt 4 does not increase video bandwidth over Thunderbolt 3, both can drive two 4K displays at 60 Hz. The main practical difference is that Thunderbolt 4 guarantees faster data transfer for external SSDs and docks, and better compatibility with Intel Evo laptops.
Apple MacBooks with M1, M2, or M3 chips use Thunderbolt 3 or 4 (depending on model). For example, the MacBook Pro 14-inch (2023) has three Thunderbolt 4 ports. A Thunderbolt monitor can connect to these MacBooks with a single cable and provide video, data, and charging.
Key differences between Thunderbolt and USB-C monitors
Here is a summary of the main differences that matter when buying a monitor in Singapore:
| Feature | USB-C (Alt Mode) | Thunderbolt 3/4 |
|---|---|---|
| Bandwidth | Up to 10 Gbps (USB 3.2 Gen 2) or 20 Gbps (USB 3.2 Gen 2x2) | 40 Gbps |
| Video support | DisplayPort Alt Mode only (up to 4K 60 Hz or 5K 30 Hz) | DisplayPort tunnelled (up to two 4K 60 Hz or one 5K 60 Hz) |
| Daisy-chaining | Not supported (most monitors) | Supported (up to 6 devices) |
| PCIe data | No | Yes (for external GPU, SSD, dock) |
| Power delivery | Up to 100 W (varies by monitor) | Up to 100 W (varies by monitor) |
| Compatibility | Works with any USB-C host (including Thunderbolt ports) | Requires Thunderbolt host to get full speed |
Daisy-chaining
Daisy-chaining lets you connect multiple monitors in a series using a single cable from your laptop. Thunderbolt supports this natively. For example, the Lenovo ThinkVision P27u-20 (around S$1,099 at Challenger) has two Thunderbolt 4 ports, one upstream, one downstream, so you can chain a second Thunderbolt monitor. USB-C monitors almost never support daisy-chaining because they lack the necessary controller. If you need a multi-monitor setup with minimal cable mess, Thunderbolt is the better choice.
Bandwidth and resolution
USB-C with DisplayPort Alt Mode can drive a single 4K monitor at 60 Hz with 8-bit colour. Thunderbolt can drive two 4K monitors at 60 Hz, or one 5K/6K monitor at 60 Hz. For ultra-wide monitors like the Samsung Odyssey Neo G9 57-inch (dual 4K, 7680×2160), you need Thunderbolt or DisplayPort 2.1 to reach 240 Hz. USB-C 10 Gbps cannot handle that bandwidth.
For most office work, spreadsheets, web browsing, coding, a single 4K 60 Hz USB-C monitor is perfectly adequate. The Dell U2723QE (around S$799 at Courts) has a USB-C port with 90 W power delivery and supports 4K 60 Hz. It is a popular choice for professionals in Singapore.
Which monitors have Thunderbolt?
Thunderbolt monitors are generally more expensive than USB-C monitors. In Singapore, you can find them at retailers like Lazada, Shopee, Challenger, and Harvey Norman. Here are some examples with approximate prices as of early 2025:
- Apple Studio Display, 27-inch 5K, Thunderbolt 3, 96 W PD. S$2,299 at Apple Store online. Best for Mac users who want sharp text and built-in speakers.
- LG UltraFine 27MD5KL-B, 27-inch 5K, Thunderbolt 3, 94 W PD. S$1,699 at Lazada. Works well with MacBooks.
- Dell U3223QE, 32-inch 4K, Thunderbolt 4 (downstream) and USB-C (upstream with 90 W PD). S$1,099 at Dell Singapore. A versatile monitor for PC and Mac.
- Lenovo ThinkVision P27u-20, 27-inch 4K, Thunderbolt 4, 100 W PD. S$1,099 at Challenger. Good for daisy-chaining.
- BenQ PD2725U, 27-inch 4K, Thunderbolt 3, 85 W PD. S$1,299 at Shopee. Designed for designers.
Which monitors have USB-C (without Thunderbolt)?
USB-C monitors are much more common and cheaper. They are ideal if you do not need daisy-chaining or extreme bandwidth. Popular models in Singapore:
- Dell S2722QC, 27-inch 4K, USB-C 65 W PD. S$499 at Lazada. Excellent value for office use.
- LG 27UP850N, 27-inch 4K, USB-C 96 W PD. S$599 at Harvey Norman. Good colour accuracy for design work.
- ASUS ProArt PA279CV, 27-inch 4K, USB-C 65 W PD. S$699 at Courts. Calibrated for sRGB and DCI-P3.
- Samsung M7 Smart Monitor, 32-inch 4K, USB-C 65 W PD. S$599 at Shopee. Includes streaming apps and remote.
- HP E27u G5, 27-inch QHD, USB-C 65 W PD. S$429 at Challenger. A solid business monitor.
Power delivery: what you need to know
Both Thunderbolt and USB-C monitors can charge your laptop. The power delivery (PD) wattage varies. For a MacBook Air (30 W charger included), even 45 W is enough. For a MacBook Pro 14-inch (67 W charger), you need at least 65 W. For a MacBook Pro 16-inch (140 W charger), you need 90 W or more, but few monitors deliver 140 W. The Apple Studio Display delivers 96 W, enough for the 14-inch Pro but not the 16-inch at full load.
If you use a Windows laptop like the Dell XPS 15 (130 W charger), a monitor with 90 W PD will still charge the battery, but slowly under heavy use. Some monitors, like the Dell U2723QE, provide 90 W. Others, like the LG 27UP850N, provide 96 W. Always check the wattage before buying.
For more on choosing the right monitor for your needs, see The Complete Guide to Choosing a Monitor in Singapore.
Cables: not all USB-C cables are equal
Even if your monitor supports Thunderbolt or USB-C Alt Mode, the cable matters. Many USB-C cables sold in Singapore are only rated for USB 2.0 (480 Mbps), they can charge your phone but cannot carry video or high-speed data. For a monitor, you need a cable that supports at least USB 3.2 Gen 2 (10 Gbps) with DisplayPort Alt Mode, or a certified Thunderbolt 3/4 cable (40 Gbps).
Thunderbolt cables are often marked with a lightning bolt symbol. USB-C cables that support video may have a SuperSpeed or DisplayPort logo. The length also affects performance: passive Thunderbolt 3 cables work up to 0.5 m at 40 Gbps; active cables can reach 2 m. USB-C cables can be longer (up to 2 m for 10 Gbps, up to 1 m for 20 Gbps).
We cover this in detail in Cable Choices for Monitors.
Which one should you buy in Singapore?
The answer depends on your laptop, your workflow, and your budget.
Buy a Thunderbolt monitor if:
- You use a MacBook Pro or MacBook Air with Thunderbolt 3/4.
- You need to daisy-chain two or more monitors.
- You work with high-resolution content (5K, 6K, or dual 4K).
- You connect external GPUs or fast SSDs through the monitor.
- Your budget is S$1,000 or more.
Buy a USB-C monitor (with Alt Mode) if:
- You use a laptop with USB-C (most Windows ultrabooks, MacBook Air).
- You only need one external monitor.
- You want to charge your laptop through the monitor.
- Your budget is under S$800.
- You do not need PCIe data transfer.
Buy a standard HDMI/DisplayPort monitor if:
- You do not need single-cable convenience.
- Your laptop has HDMI or DisplayPort output.
- You already have a separate charger.
- You want the lowest price for a given size and resolution.
For example, a Dell S2722QC at S$499 gives you 4K resolution and USB-C with 65 W PD, a great deal for most office workers. A Dell U3223QE at S$1,099 gives you Thunderbolt 4, 90 W PD, and a larger 32-inch 4K panel, better for power users who need daisy-chaining.
If you are a designer, read Design Monitor Buying Guide for colour accuracy recommendations. For gaming, see Gaming Monitor Buying Guide, note that most gaming monitors use DisplayPort or HDMI, not USB-C or Thunderbolt, because they need high refresh rates and low latency.
Common misconceptions
Here are some myths we often hear from customers in Singapore:
- "USB-C and Thunderbolt are the same." No. Thunderbolt is a superset of USB-C with higher mandatory speeds and features.
- "A Thunderbolt monitor works with any laptop." It works, but if your laptop has only USB-C (no Thunderbolt), the monitor will drop to USB-C speeds and may not support daisy-chaining or full video bandwidth.
- "All USB-C monitors charge laptops." Not true. Some USB-C ports on monitors are data-only. Check the power delivery rating.
- "USB4 is the same as Thunderbolt 4." USB4 is based on Thunderbolt 3, but not all USB4 devices are certified for Thunderbolt. A USB4 monitor may not work with a Thunderbolt host at full speed.
For more on the differences between video interfaces, see HDMI vs DisplayPort vs USB-C.
Conclusion
Thunderbolt and USB-C monitors both use the same connector, but Thunderbolt offers higher bandwidth, daisy-chaining, and PCIe support at a higher price. For most users in Singapore, a good USB-C monitor with DisplayPort Alt Mode and 65 W power delivery is enough. If you need to connect multiple high-resolution displays or use external GPUs, a Thunderbolt monitor is worth the extra cost.
Before buying, check your laptop's ports and your monitor's specifications carefully. Look for the Thunderbolt logo or the DisplayPort Alt Mode symbol. And always buy from reputable retailers in Singapore, Courts, Harvey Norman, Challenger, Lazada Mall, and Shopee Mall, to ensure warranty coverage and genuine products.
For further reading, see Office Monitor Buying Guide and Resolution Guide: 1080p, 1440p, 4K.
Related articles
- The Complete Guide to Choosing a Monitor in Singapore
- HDMI vs DisplayPort vs USB-C
- Cable Choices for Monitors
- Office Monitor Buying Guide
- Design Monitor Buying Guide
- Refresh Rate Explained