New cMBP 650M jitters, stutter, choppiness in Bootcamp

I have two brand new cMBPs with the 1gb 650m (both) and i've noticed how horrible the stuttering, jittering, jerking the graphics in Boot Camp. If this was happening to just ONE of my cMBPs then i'd understand that maybe its just the one.. but both of my units are acting identically. Overclocking doesn't fix or improve anything, it happens on all games and all benchmarks i've ran. It looks horrible...

Noticed how bad the 650m was behaving when I compared it to my Samsung notebook with 650m.. It's night and day smoother on the Samsung.

I'm running the same exact drivers on the Macbooks as well as the Samsung and the Samsung is silky smooth compared to both Macs.. I'm not sure what's going on here. The Samsung does have 2gb of video ram compared to the 1gb in the Mac but when looking at MSI afterburner during gaming, it's not even coming close to using the full 1gb of video ram on the Mac so that can't be it.

The funny part is that the Macs are getting higher benchmark scores against the Samsung, but it's so choppy so it looks a lot less playable and annoying over the Samsung.

Anybody experienced this? I wonder if I should try different drivers again.

 

Which drivers have you tried and which drivers are you using now?

 

does the samsung have an SSD? Just curious.

 

I'm on 304.79 drivers from laptopvideo2go.. just like my Samsung Series 7.

 

No, it has a slow 1tb 5400rpm drive.

 

have you tried the drivers that came with the MBP?

 

Yeah, sounds like a driver install problem to me.

 

I will try the stock drivers provided by Apple and report back.

 

That's a big, slow drive...how's the fragmentation looking? If programs are searching across 1TB of drive space for fragmented files, that could certainly cause some issues.

 

that drive is in his Samsung which is going faster. Recheck post #5

it does sound like a driver issue as others said

 

Why are you guys so noob ? Are you even aware that apple has not yet updated the bootcamp drivers for the new macbook pros with GT650M (both retina and non-retina) ???
So offcourse it will not function properly. Wait for the official updated drivers from Apple


Sent from my iPhone 4S using Tapatalk

 

apple does offer windows drivers for their new laptops, iirc.

 

Running a rMBP with the 650M in Windows at this very moment with a pretty vanilla Bootcamp install. The current Bootcamp drivers include all you need and you shouldn't see any choppiness with the official drivers.

As a tangential question to the OP, will future 650M driver downloads from nVidia replace the Bootcamp drivers as they become available?

 

the bootcamp drivers are updated very infrequently, you should keep your graphics drivers up to date on your own. Nvidia isn't offering any drivers at the moment on their website for the 650m, but they certainly will eventually.

 

Here's the screenshot of the driver installed by bootcamp.

 

Guys, I failed to mention I only experience this issue when i'm hooked up to my external Thunderbolt Apple cinema display.. When running the same benches on the actual MBP lcd, they are non-existent and no more weird jittery looking stuff..

Furthermore, I reseated the thunderbolt cable and did a shut down, clean boot directly into Windows again and it re-ran on the Thunderbolt and the issue seems to have cleared up and looks good!

I guess there's two things happening here, the thunderbolt display can't keep up with the 650m or something, or there's some kind of loss of bandwidth when transferring to the thunderbolt.. I thought it was a direct video signal here but it could somehow get degraded while being sent over the Thunderbolt port..

But after it seems to have cleared up, I can't explain what happened. But i'm sure it will happen again upon another reboot.. seems to be random.. not a complete deal breaker.. I hope Apple somehow addresses this through a EFI Thunderbolt firmware upgrade or something.. I never had this issue on my early 2011 MBP, identical performance over the thunderbolt or on the actual built-in display on the MBP.

 

I know Windows has problems with hot-plugging Thunderbolt devices... that shouldn't affect a monitor which is using it as DisplayPort, but it might be related, and maybe why it runs fine if you already have it plugged in and going on a boot up.

 

Ah, so it is. Apologies, too many posts, too little time, though glad to see the gremlins have been brought under control for the OP!

 

See thats what I thought too.. that the video signal was a displayport signal (meaning no quality loss, just a video transfer).. Seemed like some kind of "syncing" issue however in my case.. I just hope that I don't need to reboot a few times to clear the issue up when I feel like gaming

And yes there's an issue hot-plugging the thunderbolt display.. I *must* reboot entirely for it to even detect/work.

The strange part is that on my 2011 MBP, the Thunderbolt display would begin showing me duplicated images while windows was booting, such as the Windows boot logo.. Now I don't even get an image until Windows is fully loaded up all the way. It seems like these new MBps aren't allowing the same video functions as the previous.

Again, hope Apple realizes this and fixes it up.

 

If you're experiencing this solely on the Windows side, don't count on it anytime soon if at all.

 

I have also noticed stuttering in my new rMBP in bootcamp during gameplay.

I have done some testing using furmark and nvinspector to monitor the GPU

What seems to be happening is once the 650m temperature reaches 78C it will start to alternate the clocks from the default 900mhz to 796mhz back and forth every 10 seconds like in this picture:



As you can imagine this causes games to stutter and hitch a lot.
It seems to be worse if i overclock it a bit, but if i underclock to say 820mhz from the default 900mhz it wont do it.

Have I got a faulty card or is it something else?

Can anybody do a similar test and see if this happens to their cMBP or rMBP?

 

Confirmed on cMBP 15" I will play around a bit with it tonight