Chief Blur Buster wrote:VT1336 at 240Hz!
That's fantastic for 240Hz motion blur reduction.
That is equal to ((1336-1080)/1336) * (1/240) = 0.8ms vertical blanking interval
Not much time for the 1ms TN LCD GtG, so top/bottom edges will have tons of strobe crosstalk, but should certainly make the screen centre zone little bit clearer. Most VBI at 240Hz is only 0.1ms or 0.2ms by default, so you've pretty much massively enlarged your VBI to create more time for LCD pixel transitions between strobe backlight flashes.
Boldened quote is exactly the case at 240hz. Crosstalk at center is quite acceptable at 1300+ VT, but at top and bottom crosstalk become more obvious. It's obvious, but I'd not call it "tons", at least for 240hz mode, which is an optimal mode since we're buying 240hz monitors to take advantage of 240hz, right?
, a bit later I found that when reducing Horizontal Total under 2040 to keep pixelclock in <640Mhz range (when lifting VT over 1306-1308) - screen becomes a bit stuttery/unsmooth BUT what is more interesting, that unsmooth picture shows way less crosstalk then smooth as butter sync picture.
Same happens when I tried 242hz with reduced timings and strobing.
Looks like reducing HT made image out-of-sync with strobing.
HT 2040 (default) - perfectly smooth as butter picture. VT 1306-1308 at max.
HT 2020 - picture smooth, but stutters every 2-3 secs. VT ~1320 at max.
HT 2000 - picture still smooth but stutters every 0,5secs, VT 1330 at max.
HT 1990 (working minimum) - picture unsmooth, constantly microstuttering, VT 1336-1338 absolute max. Unusable, due to microstuttering/unsmoothness.
I havent tried this without strobing yet, maybe this unsmoothness is strobing-related.