Articles by John Loeffler, Components Editor

John (He/Him) is the Components Editor here at TechRadar and he is also a programmer, gamer, activist, and Brooklyn College alum currently living in Brooklyn, NY.

Named by the CTA as a CES 2020 Media Trailblazer for his science and technology reporting, John specializes in all areas of computer science, including industry news, hardware reviews, PC gaming, as well as general science writing and the social impact of the tech industry.

John has a Bachelor’s degree in English and is currently in the wrapping up a Master’s program in Computer Science, where he spends his evenings building digital circuits, multiboxing Linux kernels, and coding shell scripts.

You can usually find him on Bluesky (@@johnloeffler.bsky.social) where you’ll get hot takes on stuff as well as reposting content that is almost as good as the worst content you used to be able to find on Vine.

Articles by: John Loeffler

What is DLSS?

By John Loeffler published 28 April 25

If you're wondering 'What is DLSS?', I'm here to answer all your questions about this groundbreaking gaming technology.

An Nvidia GeForce RTX 5070 on top of an RTX 4070 Super

What is Resizable BAR?

By John Loeffler published 23 April 25

I'm here to explain what Resizable Bar is, when you should use it, and more.

Several of the best external hard drive picks on a desk with a laptop

Best external hard drive of 2025: Expert picks based on real-world testing

By John Loeffler last updated 15 April 25

Updated We tested out the best external hard drives for fast transfer speeds and storage capacity.

Fastest external SSD of 2025

By Desire Athow last updated 14 April 25

Updated We've tested the fastest external SSDs for speedy storage expansion.

One of the fastest external hard drive picks, the Seagate Portable 4TB External Hard Drive

Fastest external hard drive of 2025

By Desire Athow last updated 14 April 25

Updated We put the fastest external HDDs to the test - perfect for boosting performance and storage capacity

Best VoIP headset of 2025

By John Loeffler last updated 3 April 25

We tested out the best VoIP headsets for professionals

Best screen recorder of 2025

By Steve Clark last updated 1 April 25

Updated We've tested the best screen recorders for PC and Mac - and these are our top picks for capturing your screen, recording your camera, or streaming.

An Nvidia GeForce RTX 4080 in a testbench in a testing lab

How we test graphics cards at TechRadar

By John Loeffler published 30 March 25

Graphics cards require extensive testing to measure their performance. Here's how I test graphics cards for TechRadar's GPU reviews.

An Nvidia GeForce RTX 5080 resting on an RTX 5090 on a gray crafting mat.

How to choose a graphics card

By John Loeffler published 29 March 25

I've spent hundreds of hours testing GPUs, and I'm here to show you how to choose a graphics card for your PC.

A Samsung 9100 Pro sitting on top of its retail packaging

Samsung 9100 Pro review: Samsung's first true PCIe 5.0 drive is the best there is

By John Loeffler last updated 26 March 25

Recommended

The Samsung 9100 Pro is Samsung's first 'true' PCIe 5.0 drive, and it offers best-in-class performance across the board.

2 Comments

I test SSDs for a living, and this is the best SSD deal I'd spend my money on this week

By John Loeffler published 26 March 25

Grab the Samsung 990 Pro for a huge discount right now

Best Adobe Audition alternative of 2025

By Kieron Moore last updated 21 March 25

Updated We test the best alternatives to Adobe Audition for music and podcast production

Best photo editing PC of 2025: Our top-rated picks for photographers and creators

By Steve Clark last updated 13 March 25

Updated We tested and reviewed all the best computers for photo editing

An AMD Ryzen 9 9950X3D on its retail packaging

AMD Ryzen 9 9950X3D review: truly the best there is

By John Loeffler published 11 March 25

Best in Class

The Ryzen 9 9950X3D offers outstanding performance at every level, but its price will definitely put some people off.

2 Comments

The Apple MacBook Air next to the Dyson Supersonic R and new AMD GPU

ICYMI: the week's 7 biggest tech stories from the best tech at MWC to Apple's new iPads and MacBooks

By Hamish Hector published 8 March 25

The week's 7 biggest tech stories from MWC, Apple, Meta and more for March 8, 2025.

An AMD Radeon RX 9070 XT made by Sapphire on a table with its retail packaging

AMD Radeon RX 9070 XT review: delivering what the market needs with stunning performance at a great price

By John Loeffler published 5 March 25

The AMD Radeon RX 9070 XT is the best graphics card of this generation for gamers, especially those disappointed by Nvidia's latest offerings.

5 Comments

A Mac Studio display, one of the best monitors for Mac Studio, against a techradar background

Best monitor for Mac Studio of 2025: top displays for Apple's creative workstation

By John Loeffler last updated 4 March 25

Updated We reviewed the best Mac Studio monitors for creative professionals.

I really wanted to like the Nvidia GeForce RTX 5070, but it broke my heart and it shouldn't have to break yours, too

By John Loeffler published 4 March 25

The Nvidia GeForce RTX 5070 offers very little over the RTX 4070 Super or competing cards other than Multi Frame Generation.

4 Comments

A chip wafer manufactured at Intel Foundry

Can 18A save Intel from being devoured by its rivals – and Wall Street?

By John Loeffler published 24 February 25

Intel's 18A process technology is finally ready, but will it be enough to fend off the wolves?

Devolo Magic 2 Wi-Fi 6 Mesh on a wooden desk

Best powerline adapter of 2025

By Steve Clark last updated 24 February 25

Updated The best powerline adapters provide a simple route to extending your home network.

A Dell 6K monitor against a techradar background

Best Apple Studio Display alternatives of 2025: top monitors from 4K to 8K

By John Loeffler last updated 24 February 25

Updated We tested out the best alternatives to the Apple Studio Display

An Nvidia GeForce RTX 5070 Ti on a table with its retail packaging

Nvidia GeForce RTX 5070 Ti review: nearly perfect, but with one major flaw

By John Loeffler published 20 February 25

Recommended

The Nvidia GeForce RTX 5070 Ti offers the gen-on-gen uplift that enthusiasts demand with outstanding performance across the board while keeping its price relatively reasonable.

7 Comments

A network switch with dark pink cables attached

Best network switch of 2025: Top picks for boosting Wi-Fi speeds with wired connections

By Desire Athow last updated 19 February 25

Updated Add more wired connections with our top picks for the best network switches.

One of the fastest PC and workstations, the Mac Studio, on a white rug

Fastest PCs and workstations of 2025

By Desire Athow last updated 19 February 25

Updated We compare the fastest PCs and workstations by performance, need, and cost - and these machines we recommend.

Illustration of a CPU with beams emerging from it

The fastest CPU of 2025

By Desire Athow last updated 15 February 25

Updated The fastest CPUs out there so you can get the best performance for your needs

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