Collection: apc

Which APC power protection do you actually need?

Most PC builders think about the CPU, GPU and RAM for weeks, then plug the lot into a $5 powerboard. APC, in this category, means the power protection range from APC by Schneider Electric: surge-protected boards, Back-UPS units, Back-UPS Pro, and Smart-UPS. The three tiers differ in what happens when mains power goes sideways, not just in how many outlets they have.

Entry level is the SurgeArrest style board. It uses metal oxide varistors to clamp voltage spikes, but it has no battery and does nothing for a blackout or brownout. Those varistors also wear out each time they absorb a hit, so a board that has copped a few storms is quietly less protective than it was.

The sweet spot for most desktops is the Back-UPS line (BX and BE series). It is a line-interactive or offline-style unit with a sealed lead-acid battery and basic automatic voltage regulation. It gives you a few minutes of runtime, which is enough to save work and shut down cleanly. It usually outputs a stepped approximation of a sine wave on battery.

The enthusiast tier is Back-UPS Pro (BR series) and Smart-UPS (SMT and SMC). These add higher wattage ratings, better AVR, an LCD, and in many models a pure sine wave output on battery. Smart-UPS adds network management and hot-swappable battery options. Diminishing returns hit fast for a single home PC. Paying for rack-mount features or online double-conversion makes sense for a server or NAS that must never blink, but not for a gaming rig.

Upgrading and technical nuances

The biggest trap is VA versus watts. VA is the apparent power figure on the box, but your PC draws real power in watts, and many consumer UPS units can only deliver roughly 55 to 65 percent of their VA rating as watts. A 1500VA unit might be good for around 900W, not 1500W. Add up your realistic peak draw from the CPUs & Processors and Graphics Cards / GPU you run, then leave around 25 percent headroom.

Waveform matters more than it used to. Modern ATX 3.x supplies use active power factor correction, and some of them do not like a stepped sine wave on battery. The symptom is the PC shutting off the instant the UPS switches over, which defeats the purpose. A pure sine wave unit like the Back-UPS Pro BR series avoids that. Check your Power Supplies specs, and compare against the UPS manual. High-end GPUs also create brief transient spikes well above their rated board power, and a marginal UPS may overload alarm or trip on those.

Topology is the other real engineering difference. Offline units pass mains straight through and switch to battery when something fails, with a transfer time of a few milliseconds. Line-interactive units add an autotransformer that boosts or trims voltage without touching the battery, which is handy where brownouts are common. Online double-conversion runs everything through the inverter constantly, giving clean output and zero transfer time, but it runs hotter, louder and costs far more.

Runtime is not a spec to chase. A 500W gaming load on a consumer UPS may only get a few minutes. Plug in the USB data cable and set Windows to hibernate or shut down automatically, using either the APC software or the built-in power settings. Also size the UPS to cover your monitor, but leave laser printers off it, since they draw heavy inrush current.

Practical things to check before buying

Start with outlets and plug types. Australian units use standard three-pin AS/NZS 3112 sockets on the output, but check whether the unit has IEC C13 outlets instead. If so, you will need the right Cables & Connectors to connect your gear. Models above a certain wattage may also need a higher-current input plug, so confirm your wall socket can supply it.

Physical size and weight surprise people. Lead-acid batteries are heavy, and a 1500VA tower can weigh well over 10kg. Measure the space under your desk and next to your Computer Cases, leaving airflow around the vents. Do not bury the unit in a cupboard, because heat shortens battery life.

Battery life is typically three to five years, depending on temperature and discharge cycles. Look for models with user-replaceable battery cartridges, since replacing the battery is far cheaper than replacing the UPS. Alarms are worth reading about too. Some units beep constantly on battery, and while you can usually silence this in software, it is better to know up front.

Consider the whole desk. Your router, modem and switch are good candidates for backup power, because staying online during a short outage keeps downloads and remote sessions alive. A small UPS feeding your Networking gear, such as a TP-Link router, is cheap insurance. Your Monitors are optional, as they add load and cut runtime. Finally, an SSD can lose data or corrupt its mapping tables on a hard power cut, so a clean shutdown is worth more than the extra minutes of runtime.

If you are buying a pre-built from Computers, check its PSU wattage first and size the UPS to that, not to a guess.

Brands and local warranty

APC by Schneider Electric is the benchmark name, with Back-UPS, Back-UPS Pro and Smart-UPS covering home through to business. CyberPower and Eaton are the main competitors, and both make solid line-interactive and pure sine wave units. For surge protection alone, APC SurgeArrest boards sit alongside basic offerings from other power accessory brands.

Local warranty matters more here than with most parts. A UPS contains a battery that will eventually need replacement, and connected-equipment protection policies depend on the product being sold through authorised channels with a valid Australian serial. Grey imports may ship with the wrong plug, wrong voltage or no local support at all. Under Australian Consumer Law, you also have remedies from the retailer when a product fails to meet a consumer guarantee, so keep your invoice. Check the warranty terms for the battery specifically, as some brands treat it differently from the electronics.

Frequently asked questions

How many VA do I need for a gaming PC?

Add up the realistic peak wattage of your CPU, GPU and monitor, add about 25 percent, then choose a UPS whose watt rating (not just VA) covers it. Many mid-range gaming builds land in the 1000VA to 1500VA class.

Will a UPS work with an ATX 3.1 power supply?

Usually yes, but pure sine wave output is the safest match, especially for supplies with active PFC. Stepped sine wave units can cause some PSUs to shut off on switchover.

Is a surge protector the same as a UPS?

No. A surge protector only clamps spikes. A UPS also provides battery backup and regulates voltage, so your PC keeps running through blackouts and brownouts.

How long will the battery last?

Expect roughly three to five years, and less if the unit sits somewhere hot. Runtime is short by design, so it is about a safe shutdown rather than working through an outage.

Can I plug a laser printer or heater into my UPS?

Don't. These draw large surges and will overload the unit or flatten the battery. Keep the UPS for the PC, monitor and networking gear.