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59fps Vsync

post #1 of 8
Thread Starter 
Hey All,

Been having this issue for awhile but haven't found an answer in other forums (hope you guys have an idea).

Basically, I get a weird stutter when playing games with vsync. As an example from Serious Sam HD (it's easier to test than BF3), I'll be at 60fps and when turning sometimes or walking forward the screen will do a little stutter and I'll see my FPS drop to ~59 (sometimes hits 61 too). Pop off vsync and I won't get any stuttering (not to mention during the same scene I'll be at 200+ fps).

Before anyone says "just don't use vsync", I need it because my monitor shows tearing and its own frame "microstutter" effect as I get to odd FPS numbers (~80 is the worst because it's too out of sync from my monitor). Plus BF3 is the main reason this is the problem, I can't cap my fps or use vsync without stuttering.

Has anyone had this 59fps vsync issue when they know they could hold 200+fps without stuttering otherwise? Would loooooove to fix this.
post #2 of 8
How much Vram do you have?
Vsync stores extra frames into the memory and when new textures are loaded during high memory loads it is loaded into the virtual memory. When these textures are needed (eg turning around, new area onto the screen) the memory is swapped onto the physical memory, causing stuttering because of the delay.
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post #3 of 8
Thread Starter 
Sorry, forgot I hadn't setup my sig yet. Specs are now added (as you can see a 6970 shouldn't be an issue). For more info demonstrating what I mean, I recorded a quick play through of the same area with vsync on, vsync off, and vsync off + 60fps cap. Only with vsync on do I get the 59fps stutter. It's otherwise smooth. This is with all settings at medium, bench started at the beginning of "Sand Canyon" (in the small room), going out and killing everything then running around the empty open sand area (to show that the 59fps drop still happens).

Edit: To view the fraps benches just right-click and choose edit.
post #4 of 8
I still think this is some sorta Vram problem.
1)Is the 6970 that you have a 1GB or 2GB model?
2)What resolution are you gaming at?
3)Please try turning off AF and setting texture quality to low, then play something with vsync.

Tell us what you see then.
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post #5 of 8
Thread Starter 
Quote:
Originally Posted by guiJY View Post
I still think this is some sorta Vram problem.
1)Is the 6970 that you have a 1GB or 2GB model?
2)What resolution are you gaming at?
3)Please try turning off AF and setting texture quality to low, then play something with vsync.

Tell us what you see then.
I totally get what you're saying guiJY, small stutters like that are usually ram related in some way unless there's some weird hardware conflict going on. However, in this case I think it's how ATI's drivers are handling the ram being that it doesn't happen without vsync.

1) 2GB model
2) 1920x1080
3) I lowered the settings dramatically (low) without improvement in Serious Sam HD. I'll check out some other games too.
Edited by adrift02 - 11/3/11 at 11:28am
post #6 of 8
its not your machine. this is actually a known WIN 7 problem.google it and see
post #7 of 8
Thread Starter 
Quote:
Originally Posted by Not A Good Idea View Post
its not your machine. this is actually a known WIN 7 problem.google it and see
Can you give me a little more info? I can find some people blaming Win7 when googling but never an actual reason why it's Win7 and not something else...

Regardless, maybe I'll throw in my old 150GB Raptor, load XP, and see what happens...
post #8 of 8
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