1
00:00:07,359 --> 00:00:15,480
welcome to a special Linus Tech tips episode about adaptive vsync so this is

2
00:00:12,799 --> 00:00:22,320
all about the technology that makes GeForce cards that feature adaptive

3
00:00:18,640 --> 00:00:24,920
vsync pretty much the best thing ever

4
00:00:22,320 --> 00:00:30,400
for LCD users so back when we were all using CRTs and we were lucky to get 30

5
00:00:27,279 --> 00:00:33,160
to 40 FPS in our games and CRTs high end

6
00:00:30,400 --> 00:00:38,040
we're capable of 75 85 H Hertz we didn't worry too much about the frame rate

7
00:00:35,879 --> 00:00:43,640
going over the refresh rate of the monitor so to be clear the frame rate is

8
00:00:41,000 --> 00:00:49,520
how many frames per second or FPS or images per second the video card could

9
00:00:46,800 --> 00:00:54,640
potentially output to a display device in this case you can see our frame rate

10
00:00:51,600 --> 00:00:58,440
is around 150 FPS in Battlefield 3

11
00:00:54,640 --> 00:01:00,800
staring at a wall this is with a 660 Ti

12
00:00:58,440 --> 00:01:07,320
refresh rate is how many images the screen can draw in a second so this is a

13
00:01:05,040 --> 00:01:11,240
pretty fast monitor this is a 120 HZ monitor for 60 HZ monitor users this is

14
00:01:09,759 --> 00:01:18,000
going to be even more of an issue because you're much more likely to have

15
00:01:13,320 --> 00:01:20,479
these out of sync so 120 and 150 what

16
00:01:18,000 --> 00:01:26,640
that means is this video card is feeding this 150 images and this monitor is

17
00:01:23,479 --> 00:01:28,840
displaying only 120 of them so what that

18
00:01:26,640 --> 00:01:34,360
means is while the video card is in the middle of changing from this position

19
00:01:32,759 --> 00:01:39,600
actually here let's do it this way from something being in this position to this

20
00:01:36,880 --> 00:01:43,560
position the monitor might pick up half of this one and half of this one and you

21
00:01:41,520 --> 00:01:49,280
get this disjointedness between where the image is split called tearing so

22
00:01:46,320 --> 00:01:53,640
tearing only occurs when the frame rate goes above the refresh rate this is an

23
00:01:51,560 --> 00:01:59,000
extreme example of tearing this is not an artifact This Is Us looking at

24
00:01:55,960 --> 00:02:01,280
something and seeing the that that

25
00:01:59,000 --> 00:02:03,680
tearing so you can actually also see it in the line here I don't know if you

26
00:02:02,520 --> 00:02:07,679
guys are going to be able to see that very well but you can see it gets quite

27
00:02:05,680 --> 00:02:12,920
distorted and quite crappy so you can see like it breaks up

28
00:02:10,160 --> 00:02:18,760
like this so the way to combat tearing is to turn on vsync or vertical sync

29
00:02:16,280 --> 00:02:23,319
what that does is it locks your frame rate at the refresh rate of your monitor

30
00:02:21,440 --> 00:02:28,480
the problem with vsync is that when you get into an actionpack scenario vsync

31
00:02:26,239 --> 00:02:34,200
has to keep the refresh rate or rather the frame rate at an

32
00:02:30,879 --> 00:02:35,800
even crap I always forget is it Factor

33
00:02:34,200 --> 00:02:40,239
whatever the thing it has to multiply out to the refresh rate of the monitor

34
00:02:37,959 --> 00:02:45,200
so if you run into like a firefight and you would have normally dipped to 110

35
00:02:42,720 --> 00:02:49,840
FPS it'll actually knock you all the way down to 60 and then all the way down to

36
00:02:47,640 --> 00:02:55,000
30 and all the way down to 15 until it reaches one where you can

37
00:02:52,800 --> 00:02:59,640
keep that sustained frame rate so what we're going to do is we're going to show

38
00:02:56,480 --> 00:03:01,360
you how adaptive vsync gives you the

39
00:02:59,640 --> 00:03:06,560
best Best of Both Worlds whenever you're going to be running too high vsync will

40
00:03:04,360 --> 00:03:10,840
automatically turn on and whenever you're going to be running too low or

41
00:03:08,720 --> 00:03:15,920
below that refresh rate vsync will turn off which will allow you to run at 110

42
00:03:13,599 --> 00:03:18,159
or 100 FPS rather than knocking you all the way down to 60 and giving you that

43
00:03:17,239 --> 00:03:24,640
difference so we're going to turn on adaptive vsync and we're going to come back and look at this wall and show you

44
00:03:23,040 --> 00:03:30,840
what a difference it makes to the tearing this that uh that goes

45
00:03:28,040 --> 00:03:34,200
on you can change the in the manage 3D settings of your NVIDIA control panel so

46
00:03:32,599 --> 00:03:37,760
we're going vertical sync instead of using the 3D application setting we're

47
00:03:36,239 --> 00:03:43,159
going to go with adaptive yay adaptive

48
00:03:40,640 --> 00:03:46,120
bsync all right let's fire up our game again and see if this actually works I

49
00:03:44,720 --> 00:03:49,040
don't know if it will no looks like we're going to have to uh we're going to

50
00:03:47,720 --> 00:03:55,200
have to restart our game here slick thought it might work but I thought he was wrong and it looks like I was

51
00:03:52,799 --> 00:04:00,439
right all right so here we go we have adaptive vsync on which means you can

52
00:03:57,239 --> 00:04:03,120
see that we're pinned at 120 FPS

53
00:04:00,439 --> 00:04:10,400
which means that after we chop this thing ha no tearing artifacts see that

54
00:04:08,720 --> 00:04:15,079
that is what it is supposed to look like without all of those lines same thing if

55
00:04:12,519 --> 00:04:20,320
we look back and forth on these pillars we're not going to see that horrible

56
00:04:17,919 --> 00:04:24,280
separation now let's go find ourselves a firefight and let's see what happens to

57
00:04:21,959 --> 00:04:31,400
the frame rate so as soon as we drop below 120 FPS instead of knocking us all

58
00:04:27,680 --> 00:04:35,280
the way down to 60 we should be able to

59
00:04:31,400 --> 00:04:37,840
achieve like you know 119 or 117 or 115

60
00:04:35,280 --> 00:04:42,680
so there you go that is adaptive vsync it means we don't have to deal with bull

61
00:04:39,960 --> 00:04:46,919
crap tearing which looks terrible and is very very distracting because you can

62
00:04:44,360 --> 00:04:50,560
have the most beast machine in the world and it's almost the more Beast of a

63
00:04:48,560 --> 00:04:56,000
machine you buy the more susceptible you are to this horrible visual anomaly and

64
00:04:53,840 --> 00:04:59,720
so we don't have to deal with that and we don't have to deal with dipping all

65
00:04:57,720 --> 00:05:04,160
the way down to 60 FPS which I personally can tell the difference

66
00:05:01,400 --> 00:05:07,520
between UH 60 and 120 whatever you people who think that you can't tell the

67
00:05:05,840 --> 00:05:12,479
difference you guys are just totally wrong and I'm sorry but uh get a better

68
00:05:10,639 --> 00:05:17,880
machine and get get a better Monitor and you will understand um so I don't have

69
00:05:14,919 --> 00:05:21,160
to suffer with 60 or 30 FPS but I don't have to deal with tearing so it's like

70
00:05:19,479 --> 00:05:25,160
like the best thing ever thank you NVIDIA for bringing us adaptive vsync

71
00:05:23,280 --> 00:05:29,360
which you can see continuing to uh to work here as we watch these frame rates

72
00:05:27,600 --> 00:05:32,199
move all over the place and do what they do

73
00:05:30,639 --> 00:05:37,319
going to play me some Battlefield 3 now I actually kind of like this mouse I hadn't tried it before CM Storm

74
00:05:35,560 --> 00:05:40,759
something or other don't forget to subscribe to Line Tech tips for

75
00:05:38,560 --> 00:05:43,759
unboxings reviews and other computer videos