No matter your operating system, knowing how to combine PDF files is a good skill. We'll teach you the best ways to do so for Windows, macOS, or via the web.

Regardless of which online service you choose from the ones featured in our guide, we'll show you how to convert MKV to MP4 video files.

Earlier this year, Dell showed us the promise of an exciting new future for gaming monitors with the reveal of the Alienware 55-inch OLED gaming display. We loved it. But according to new reports, it may never see the light of day. Is PC gaming on a big OLED monitor a dream that will never come true?

Drawing software doesn't have to empty your wallet. These free drawing web and desktop apps are as capable as Photoshop or Illustrator. Here are our favorites.

Call of Duty: Modern Warfare is the latest AAA title to support real-time ray tracing, and it will now be bundled free with every purchase of an eligible Nvidia GeForce RTX card, or equipped laptop or desktop. The game is set to launch October 25 with an open beta starting September 19.

HyperX has refreshed the popular Fury DDR4 line up with a new look and added LED lighting to the Fury DDR4 RGB. The lighting works with a variety of major motherboards lighting software. The memory is Plug N Play ready and has predefined Intel XMP profiles for optimal performance.

The all new Razer Viper is a gaming mouse designed with esports in mind. It has optical mouse switches, eight programmable buttons, and weighs 69 grams — making it Razer's lightest ever mouse. It was designed with the help of esports professionals like Taco of GS:GO fame.

Aorus has unveiled two new cards built around Nvidia's GeForce RTX 2080 Super chipset and built-in watercooling for extreme overclocking and performance. One of the cards features a pre-built and pre-filled liquid cooling system, while the other has a water block to connect your own liquid cooling to.

Gaming laptops are finally great in 2019. Great processors, excellent graphics and a variety of screens. But if you want anything other than 1080p or 4K, you will have a hard time finding one. But why is that?

Taking a page from mobile carriers' playbook, Asus has introduced a novel new program that lets PC gamers trade up their old graphics cards when purchasing any new Asus branded cards. The offer gives approved customers up to a $340 rebate for a qualified graphics card.

Samsung has announced a brand new gaming monitor, the CRG5 (C27RG5). It is a curved gaming monitor with a FullHD, Nvidia G-Sync, VA panel with a 240Hz refresh rate. It has a bezel-less design with wide viewing angles, great contrast, and presets for a variety of game types.

Razer has introduced the Kraken X and Kraken X for Console which join the Kraken family of wired gaming headsets. It weighs half a pound, has memory foam ear cushions that are glasses friendly. It also features 7.1 surround sound audio in a wallet-friendly package that costs only $49.99.

The Asus Prime Utopia is a concept motherboard design that moves the graphics card to the back, has modular IO ports, proprietary Hydra Cortex fan controls and a detachable OLED touch screen for good measure. Can this new design replace the ancient ATX form factor that we've all used for decades now?

The Razer Blade Studio Edition laptops are an upgrade to the regular Blade 15 and Blade 17 Pro. They have all new NVIDIA RTX Quadro graphics for workstation performance on the go. Buyers have an option of 4K OLED or 4K 120Hz screens.

SteelSeries Apex Pro is the first ever keyboard with adjustable actuation switches allowing for on-the-fly changes depending on the app running. It also has an OLED Smart display for instant notifications from other applications. SteelSeries also announced the a tenkey-less version and the Apex 7, a more traditional mechanical keyboard.

Ahead of Computex, Acer has announced a pair of updates to a couple of its most popular budget laptop lines. Both the Nitro 5 and Swift 3 will now be powered completely by AMD silicon in the form of Ryzen 7 Mobile. Both laptops include options for discrete Radeon RX graphics for light gaming and enhanced productivity performance.