When I first got my RTX 4090, I tried to overclock it to squeeze an extra 3-5% performance for "free." Unlike CPU overclocking, this was easy because all I had to do was move the core clock and memory clock sliders in MSI Afterburner, run a quick stress test, and call it a day. As long as I wasn't going crazy with the sliders, everything felt safe and predictable. Even a small bump in average FPS was enough to convince me I was getting the most out of the money I had paid for.

However, in the last couple of years, that mindset slowly changed, as I started focusing more on how games felt and other metrics instead of relying solely on the FPS counter. Longer gaming sessions exposed issues that quick test runs never did, like higher temperatures, louder fans, and inconsistent boost behavior. That's why I now rely on undervolting instead of overclocking. I get a GPU that not only runs cooler and quieter but also performs more consistently, no matter what game I play.

The FPS boost from overclocking isn't free

Higher temps, louder fans, and inconsistent performance make it hard to justify

Getting better frame rates than what's advertised by moving some sliders seems like a real win, but the problem is that those gains don't really come for free. And I had to learn that the hard way. Even a mild overclock pushed my GPU close to its very limits, which showed up almost immediately in temperatures and fan noise. You'd think that a beefy cooling solution would help, but when you have a 450W card, there’s only so much headroom to work with before physics catches up.

As someone who likes chasing lower temperatures, I wasn't comfortable with my GPU running hotter. Higher temperatures also mean fans ramp up aggressively, which made gaming sessions uncomfortable whenever I had my headset off. And let's not forget that the higher temps are a direct result of the card drawing more power. On top of that, overclocking resulted in my 4090 hitting its power and thermal limits more often, leading to fluctuating boost clocks that made some games feel less consistent.

Undervolting made my GPU more efficient

When you have a power-hungry card, undervolting simply works better

Unlike overclocking, which is all about pushing peak performance, undervolting makes better use of what your GPU can already do. Out of the box, high-end GPUs like my RTX 4090 already boost aggressively and sit close to their thermal and power limits. By trimming excess voltage instead of forcing higher clocks, I gave my card more breathing room to operate the way it's supposed to. The first thing I noticed was my 4090 drawing around 35–40 watts less and running 2–3 degrees cooler across a few AAA games I tested.

Some of you may argue that undervolting negatively impacts frame rates, but when you do set the voltage curve correctly, there's barely any difference. I dialed in the lowest voltage that still allowed my 4090 to maintain its usual boost clocks under load, which was 1.00V. I'll admit it takes a while to run stability tests and fine-tune the curve, but once it's done, the payoff is worth it. My average FPS stayed within 1-2% of my card's stock performance, so I didn't really give up anything to reap all these benefits.

Overclocking is fine if cooling isn't a concern

But undervolting wins by a landslide if average FPS isn't your top priority

At the end of the day, the only real benefit of overclocking is squeezing out the highest possible peak performance. If your goal is to chase numbers, overclocking still makes sense, especially if your GPU is liquid-cooled or has an oversized heatsink to dissipate all that heat. With enough cooling headroom, you can keep temperatures and noise in check while pushing clocks higher. Even during long sessions, a well-cooled card should be able to sustain higher boost clocks after an overclock.

However, for me, that wasn't the case. My RTX 4090 was hitting 80 degrees under load, and at that point, the extra FPS stopped feeling worth it. After undervolting, performance felt more consistent, even though my frame rates weren't as high, and that matters a lot when you're playing on a high refresh rate monitor like my Alienware AW2725DF. More importantly, the peace of mind you get from knowing your GPU is running cooler, quieter, and more efficiently is hard to give up once you experience it firsthand.

Undervolting made a bigger impact than overclocking ever did

Overclocking sounds nice at first, but when you weigh the marginal FPS gains against higher temperatures, louder fans, and inconsistent performance, that appeal suddenly stops mattering. Undervolting gave me the opposite experience. It's almost like it tamed my power-hungry RTX 4090, allowing it to deliver the performance I already paid for without constantly brushing against its thermal and power limits. For how I actually game, that improvement was far more noticeable than any extra frames I ever got from overclocking.