The Tempest has no OSD, so the only way to calibrate it is with LUT-generating software like CalMAN. We did this for the purposes of our tests, and we’ll explain how it affects the results as we go. If you don’t have the necessary gear, Overlord at least offers color profiles to download.
Of course, the real reason you'd make the X270OC a centerpiece of your gaming PC is its overclocking ability. Natively, we're dealing with a 60 Hz IPS panel. But thanks to Overlord’s custom PCB, it can run at up to 120 Hz reliably. Why do we say “up to”? According to Overlord, not every example will be stable at 120 Hz. It is possible that you’ll see artifacts like dropped frames, or you might even hear coil whine from the timing controller choke.
You won’t simply be able to plug in the X270OC and choose 120 Hz from your Windows Control Panel, either. There are a couple of steps you need to take first.
Setting The Refresh Rate
To begin, download the Pixel Clock Patch utility here for Nvidia or for AMD/ATI. All that this app does is removes the pixel clock limiter built into your video driver. It’s a quick operation, which can be easily undone since a backup of your un-patched driver is automatically created.
Next, you need the Custom Resolution Utility. This is where you create custom refresh rates.

The first screen manages your custom configurations. To create a new one, click Add under Detailed resolutions. Then, you're taken to the manual setup window.

As you can see, there are quite a few parameters to address when overclocking a monitor. The screenshot above represents our particular X270OC. These settings may not work for everyone. But they'll suffice as a starting point. Additionally, there are plenty of online resources available to help you create custom resolutions and achieve a stable overclock.
Calibration
The only image control available is brightness, which moves in fairly coarse steps of about 8 cd/m2 per click. To complete our benchmarks, we used CalPC to generate a software look-up table after measuring the X270OC’s default state. For more information on the CalPC process, please refer to Do It Like Tom's: Calibrating Your Monitor With CalMAN RGB,where you’ll find a step-by-step guide.
- Overlord Tempest X270OC: 27” 120 Hz IPS Gaming Monitor Review
- Packaging, Physical Layout, and Accessories
- Setup and Calibration Of The Overlord Tempest X270OC
- Measurement and Calibration Methodology: How We Test
- Results: Brightness and Contrast
- Results: Grayscale Tracking and Gamma Response
- Results: Color Gamut and Performance
- Results: Viewing Angles and Uniformity
- Results: Pixel Response And Input Lag
- Overlord’s Tempest X270OC Satisfies The Speed And Resolution Obsession
any idea if there will be a similar monitor spec but 4k resolution ?
thanks,
any idea if there will be a similar monitor spec but 4k resolution ?
thanks,
Question is how much will this cost here in Europe.
Also, now make the same thing happen in a 30" format with 2560x1600 resolution, and than I am definitely opening my wallet.
MonsterCookie, alas I doubt that will happen. A few years ago, 1440 and 1600
height monitors were priced basically the same, ie. expensive. Back then, top-end
GPU reviews tended to use 2560x1600 as a typical max res test for gaming. But
then buying patterns evolved, the usual feedback between pricing and demand,
people tended to opt more and more for 1440 displays instead. As a result, when
I wanted to get a 1600 IPS a while ago, I was amazed to find 1600 hieght displays
were about 4X more expensive than 1440 IPS models.
Presumably it suits the industry to home in on a more typical standard, and for
the moment, beyond HD, 2560x1440 seems to be it. Very unlikely the industry has
any interest in pushing 1600 height to the masses, so probably the next main step
up will be to 4K, or as I wish they'd call it instead, quad-HD.
Ian.
http://overlordcomputer.com/blogs/news/7384176-the-overclock-overview
It's like hoping you'll get an i7 that will have a stable OC to 4.5Ghz 24/7. It's the luck of the draw.
I don't much like putting my money on hope. If they did have a guarantee or just sold a monitor that shipped to my house with 120Hz capability, I'd be more likely to hand over my cash.
You know darn well they make sure the review site is getting a good one.
1) Yes, This works perfectly at 90Hz. Yes, it is a great improvement. Much greater improvement is 60->90 than 90->120.
2) All monitors are from this day to the future to come 16:9. So, its useless to fancy 16:10 monitors anymore, they wont be coming ever again.
3) 4K 120Hz gaming monitors wont be coming, either. At least not in the foreseeable future.
4) Overclocking this is not luck of the draw. They all come at least 96Hz, and the great majority work 120Hz.
5) The lack of displayport etc is what helps keeping input lag low.