The BenQ is also available at Newegg: http://www.newegg.com/Product/Produ...4014451&cm_re=freesync-_-24-014-451-_-Product. Fair amount of reviews and none mentioning ghosting as a con. PCPer and the polish site do use a white to black transition so probably worst case scenario.
If you have a decent monitor with okay calibration, you should be able to see the overdrive artifact on the ROG Swift in the above image.
Had the windmill demo taken place on a blue-ish background, you would have seen the overdrive artifact show as a noisy shadow behind the windmill blade.
What, no way, I was told in this thread that overdrive does not cause reverse ghosting..
The Swift does show better than the other two monitors but I believe the other two are not TN panels.
Still waiting for a 34 inch 3440x1440 TN 120hz+ TN freesync preferrably curved. Who is going to take my money?
The BenQ is also available at Newegg: http://www.newegg.com/Product/Produ...4014451&cm_re=freesync-_-24-014-451-_-Product. Fair amount of reviews and none mentioning ghosting as a con. PCPer and the polish site do use a white to black transition so probably worst case scenario.
Prices will fall until adaptive vsync is eventually free. It's the nice thing about commodity features.
Prices will fall until adaptive vsync is eventually free. It's the nice thing about commodity features.
Similarly, the use of an IPS panel can be good and bad. The good news is that you get the wide viewing angles associated with IPS – and really, for a 34” display you’re going to want them! – but at the same time there’s a question of pixel response times, with most IPS panels rated at 5ms+ compared to TN panels rated at 1-2ms. LG specifies a response time of 14ms for the 34UM67, though they don’t mention whether that’s GtG or Tr/Tf. There’s also a setting in the OSD to improve response times, which we used to capture the following images with a 1/400s shutter speed. In the gallery below, we also compare the LG 34UM67 with the ASUS ROG Swift to show how the two panels handle the same content (from AMD’s FreeSync Demo).
My personal opinion is that LG's 14ms response time value may be incorrect, at least depending on the setting. The ASUS ROG Swift clearly has a faster response time in the above images and gallery, and if we compare best-case ghosting results, the “Normal” setting on the ASUS is very good while even the “High” setting on the LG still shows about two-thirds of the blades ghosting – I had some other images where the ghosting indicates the transition between frames occurs by the time around half of the display has been updated (~8ms). But the windmill in AMD's FreeSync demo is actually something of a best-case scenario if you happen to enable overdrive features.
But the windmill in AMD's FreeSync demo is actually something of a best-case scenario if you happen to enable overdrive features. Let's look at what may be less ideal: F1 2014... Here the tables turn, with Normal Overdrive on the ASUS display causing some rather obvious artifacts, and if you enable Extreme Overdrive it can be very distracting. The LG display by comparison doesn't show any artifacting from increasing the Response Time setting, and at High it shows much less ghosting than in the windmill demo.
Last video: http://pclab.pl/art62755-4.html
Ghosting is not a problem when you stay at the maximum refresh rate because then the overdrive setting is working.
But at the monitor's max refresh rate you also get either v-sync input latency or tearing.
Here's my attempt at an explanation:
Ghosting is a separate hardware issue (lcd tech) from smoothness due to fixed refresh rate issues(stutter\tearing) vs dynamic refresh rate modes G-Sync\FreeSync(no stutter or tearing).
To fix ghosting the following is applied:
1. For old school, fixed refresh implementation there is hardware in the monitor (scaler) that performs overdrive calculations based on current fixed refresh rate.
2. For dynamic refresh:
a. GSync module probably (I don't know for sure, but Nvidia says the module does) performs the above, just dynamically calculating the overdrive values based on how long previous image was displayed
b. FS - seems to not perform any overdrive calculations when in Freesync operating range so has more ghosting than previous two refresh rate modes (fixed, GSync).
UPDATE: New Anantech Review and they addressed the "Ghosting" issues:
....
Not convinced in that review they understood or tested for overdrive being turned off when running at variable refresh. Was freesync even running in the F1 test? e.g. that F1 screenshot shows the fps to be 131, outside of the freesync range.
They also didn't test properly what happens under the min freesync range where you are meant to get much worse stutter because it just sits at the monitors min fps (i.e. 48hz). The gsync ones work better here because (a) they go down lower to 30hz, and (b) they run the monitor at multipliers (e.g. 120hz for 30hz). Apparently you get a very pronounced effect going under min freesync fps that's not there for gsync.
The pclab videos show there is less ghosting the higher the framerate gets. The windmill demo runs at 45-60 fps, so that's why there's a massive difference between that and the f1 game running at 130 fps.
Hexus XG270HU
http://hexus.net/tech/reviews/monitors/82189-acer-xg270hu-freesync-monitor/
Can't wait for TFTCentral's for the more detailed lag/latency testing -
Set a frame cap.