Jump to content

Archived

This topic is now archived and is closed to further replies.

Rockliffe

Urgent help needed with GTX770...

Recommended Posts

Hi guys, I'm feeling very, very sad and really cannot fathom out my predicament. I have just replaced my GTX580 1.5gb with a GTX770 4gb card and have been really impressed with the increase in performance, especially in clouds, (you were right Ben Cap, I was wrong) Anyway, I did a driver clean sweep after uninstalling the 580 and started with the latest driver for the 770. I also rebuilt a new FSX cfg. Anyway, for some really strange reason I am having terrible memory issues. eg, leaving CYVR + Orbx in the NGX and after about five minutes of blurries, the MB starts it's dinging message which is an indication of OOM. Then the sim starts to stall when loading textures and eventually freezes. It did the same thing yesterday from KPHL to KBOS after about fifteen minutes, this was in fair weather. This is with normal autogen and 5.5LOD. In fact these setting are exactly the same as I had with the 580. This is a real issue as I have never had this problem prior to installing the 770. I have also increased my FFTF to 0.33 from 0.12 but with no benefit. Can anyone offer some advice or suggest what may be going on. Cheers...

Share this post


Link to post
Share on other sites

start over and put the old card back in, see if you have the same problem,  I had a 580gtx and jumped to 780gtx, did not have any problems.  Good luck

Share this post


Link to post
Share on other sites

This may help.  The P3D forum contains a posting from someone who stated that he had issues upon installing a new GPU.  The resolution to the issue was to assure to clear the contents in the Shaders folder:

C:\Users\%USERNAME%\AppData\Local\Lockheed Martin\Prepar3D v2\Shaders

 

It seemed to do the trick.  Check out the forum posting per the following link and see if that helps any.  Good luck.

http://www.prepar3d.com/forum-5/?mingleforumaction=viewtopic&t=4200

Share this post


Link to post
Share on other sites

start over and put the old card back in, see if you have the same problem,  I had a 580gtx and jumped to 780gtx, did not have any problems.  Good luck

Thanks for the reply...

 

 

This may help.  The P3D forum contains a posting from someone who stated that he had issues upon installing a new GPU.  The resolution to the issue was to assure to clear the contents in the Shaders folder:

C:\Users\%USERNAME%\AppData\Local\Lockheed Martin\Prepar3D v2\Shaders

 

It seemed to do the trick.  Check out the forum posting per the following link and see if that helps any.  Good luck.

http://www.prepar3d.com/forum-5/?mingleforumaction=viewtopic&t=4200

That's interesting Mike, I'll check it out and let you know the results. Cheers...

Share this post


Link to post
Share on other sites

Still no luck after deleting the shaders. Sat on Rwy26R at CYVR with Orbx + NGX, frames were showing 26-28, when I went to the exterior view and panned the camera, a mass of graphical spikes appeared and the whole sim stopped and I got the OOM message :mad: :mellow: This just doesn't make sense. I wonder if it could be a duff card...

Share this post


Link to post
Share on other sites

Hey Howard are you running it in prepar3d V2.0 or FSX.

My EVGAGTX 770 2gb is coming tomorrow. The reason I never went for the 4gb model was that I still run FSX in DX9 very happily on my 580 1.5gb. No OOM`s or other issues like that. I do keep LOD at 4.5 and knocked the scenry complexity and autogen down a notch or two when I started flying the PMDG 777.

The way I understand it, 32gb apps like FSX in DX9 shadow the VRAM into VAS so a 4gb card will OOM pretty easily.

I could be way of the mark if you are  running prepar3d V2 or FSX in DX10 I`m don't think this rule applies. Someone will have to clarify that though as I`m not totally clued up on how DX10/11 works.

If prepr3d goes native 64bit in the future and supports SLI then I was going to stick another 7702gb in and run them SLi.

 

Just throwing that out there for you mate.

 

Doogie

Share this post


Link to post
Share on other sites

Hey Howard are you running it in prepar3d V2.0 or FSX.

My EVGAGTX 770 2gb is coming tomorrow. The reason I never went for the 4gb model was that I still run FSX in DX9 very happily on my 580 1.5gb. No OOM`s or other issues like that. I do keep LOD at 4.5 and knocked the scenry complexity and autogen down a notch or two when I started flying the PMDG 777.

The way I understand it, 32gb apps like FSX in DX9 shadow the VRAM into VAS so a 4gb card will OOM pretty easily.

I could be way of the mark if you are  running prepar3d V2 or FSX in DX10 I`m don't think this rule applies. Someone will have to clarify that though as I`m not totally clued up on how DX10/11 works.

If prepr3d goes native 64bit in the future and supports SLI then I was going to stick another 7702gb in and run them SLi.

 

Just throwing that out there for you mate.

 

Doogie

 

Hi Doogie, sure, FSX DX9.  Mmm, I have to say this was my original suspicion. I was hoping I might be wrong. So effectively the 4gb memory is being shared by FSX's VAS, making less room for FSX, or something like this. is this what you mean...

 

BTW I did get the card in preparation for P3Dv2, but was hoping to use it in FSX for some time longer before making the plunge. Looks like I may have to take the plunge sooner rather than later, or return the card.

Share this post


Link to post
Share on other sites

Hi Howard,

Dumb question...but did you remember when you rebuilt your fsx.cfg file to include under the GRAPHICS area HIGHMEMFIX= 1

 

When you 'improve' your hardware build and then tweak the cfg file and drivers etc, it unfortunately brings out the worst in FSX until you find what is causing the upset. 

 

My FSX machine (touching wood right now^^^) has been very stable since I froze my Windows updates a few years ago when I was in a stable period and I try not to 'meddle'. 

 

Hope you find your issue. 

Share this post


Link to post
Share on other sites

Yeah Howard that is exactly what I mean my friend. Best to wait until someone more qualified than myself pops in this thread though before doing anything drastic like returning it.

 

Geoff has a good point as well tough, making sure highmemfix is in there.

 

I wish you best of luck mate, I really do think that the issue is the huge amount of Vram killing your VAS in DX9. :(

 

Doogie

Share this post


Link to post
Share on other sites

Thanks Geoff & Doogie, help appreciated. I have the Highmemfix tweak added Geoff, thanks. Maybe I'll PM Paul and see if he has any ideas... cheers...

Share this post


Link to post
Share on other sites

no BP= tweak ? no tweaks at all ?

And did you check whether the VRAM is OK ? it might a failing hardware too. You're not the first to use a 2 gb+ card and haven't heard that the VAS was saturated by a card after a  few minutes even on a Titan.

Share this post


Link to post
Share on other sites

no BP= tweak ? no tweaks at all ?

 

And did you check whether the VRAM is OK ? it might a failing hardware too. You're not the first to use a 2 gb+ card and haven't heard that the VAS was saturated by a card after a  few minutes even on a Titan.

 

Hi Dominique, sure , I have the usual tweaks, but I have rebuilt the cfg and used without tweaks and used with tweaks. BP on and off etc. I don't think it's a hardware issue, as it has all been fine with the 580. Only since the 770 installation have I witnessed this problem.

Share this post


Link to post
Share on other sites

B)  looks like I may have discovered the problem... for some reason, my C drive had only about 300kbs of space left!!! After deleting a mass of progs and data it released 10gb. I'm now flying the same flight for the past 25 minutes with no problem! Still testing and keeping fingers crossed! :smile:

Share this post


Link to post
Share on other sites

Great news Howard, keep us posted how it goes.  I`m looking forward to installing my 770 tomorrow. Even bought a new can of air to give the case a good blow out ;)

 

Doogie

Share this post


Link to post
Share on other sites

Hey Howard are you running it in prepar3d V2.0 or FSX.

My EVGAGTX 770 2gb is coming tomorrow. The reason I never went for the 4gb model was that I still run FSX in DX9 very happily on my 580 1.5gb. No OOM`s or other issues like that. I do keep LOD at 4.5 and knocked the scenry complexity and autogen down a notch or two when I started flying the PMDG 777.

The way I understand it, 32gb apps like FSX in DX9 shadow the VRAM into VAS so a 4gb card will OOM pretty easily.

I could be way of the mark if you are  running prepar3d V2 or FSX in DX10 I`m don't think this rule applies. Someone will have to clarify that though as I`m not totally clued up on how DX10/11 works.

If prepr3d goes native 64bit in the future and supports SLI then I was going to stick another 7702gb in and run them SLi.

 

Just throwing that out there for you mate.

 

Doogie

 

Not true actually - it only shadows what you're actually using, not the full 4GB or whatever. (if it did, a 4GB+ card couldn't even run FSX, it would OOM immediately - obviously not true as there's people running Titans with 6GB etc)

Share this post


Link to post
Share on other sites

Thanks Ryan, hence the reason why I said wait until someone that knows what there talking about comes along. I just seem to remember a discussion on here some time ago and the VAS/VRAM stuff was mentioned, probably around the time the GTX590`s came out.

Thanks for clearing that up :)

 

Doogie

 

edit, I take it that's the reason when folks stick a big VRAM card in and think they can crank the settings way up they still OOM?  Pretty sure I hit the sweet spot with my 580, wondering how the 770 will do when I install it.

Share this post


Link to post
Share on other sites

Not true actually - it only shadows what you're actually using, not the full 4GB or whatever. (if it did, a 4GB+ card couldn't even run FSX, it would OOM immediately - obviously not true as there's people running Titans with 6GB etc)

 

Thanks for clearing that up Ryan.

Share this post


Link to post
Share on other sites

What's the latest, Howard?  Hopefully it was the issue related to the space on your hard drive that you mentioned earlier.  I have my eye on a 770/4G myself.

Share this post


Link to post
Share on other sites

What's the latest, Howard?  Hopefully it was the issue related to the space on your hard drive that you mentioned earlier.  I have my eye on a 770/4G myself.

 

Hi Mike, I can confirm that yes, it was the lack of space on the C drive. Not quite sure what has gone on, because I always like to keep about 10Gb free on my 64gb SSD OS. Anyway, during the time when I was trying to get to the bottom of things I noticed the OS SSD had only about 260kb of free space!! No wonder I could hardly get anything to work! Anyway, that seems to have been the issue, as I did a test flight yesterday of 45 minutes in the NGX with full addons and had no recurrence of the problem.

 

As for the GPU, I have always been one of the many who believes an upgrade in the GPU department is futile in FSX, well this has proved me wrong and I hold my hand up and apologise publicly for the times I have been a naysayer. It simply isn't true. OK, I'm sure it is very system dependent and suspect I have seen a boost because I have a pretty fast CPU (4.6oc) and the GPU may well have been the bottleneck. I have seen an increase overall of about 5-10% but where I have seen a big improvement is in cloud and at large airports. I saved some flight scenarios with my 580 so I could do some comparisons. With heavy cloud cover in the piston Duke I went from 22fps to around 28/30fps. Around some of the heavier airports where I noticed stutters and low frames, again I saw similar increases. Then there were scenarios where I could see no difference, very odd. I guess it's the way some addons are designed. Anyway, I am a happy boy. I can't say everyone else will experience the same kind of improvements, but only that I have on my system.

 

Take from my experience what you will Mike, good luck.

Share this post


Link to post
Share on other sites

I am glad to hear that things are working well for you and that it was simply a minor issue after all.  Amazing how many things can affect performance.  

Share this post


Link to post
Share on other sites

@OP

Did you happen to load P3Dv2 recently? It will create a 10gb temporary chunk on the c: drive even if you install to another drive. It is located in Program Data/cache or something similar

Share this post


Link to post
Share on other sites

@OP

Did you happen to load P3Dv2 recently? It will create a 10gb temporary chunk on the c: drive even if you install to another drive. It is located in Program Data/cache or something similar

Ah, thanks for the info, but no, I haven't installed P3D. In fact from all the things I've read and all the issues people are having just to get it working reasonably, I think I'm going to stick with FSX and try installing Steve's fixer again.

Share this post


Link to post
Share on other sites

Hi guys:

 

I read through this as I too am having problems with a GTX770 that are killing me. New rig, I7 4770 with the video card. Had problems when it was Win 7 and tried everything, then just upgraded to Win8 and same problem. P3D in Win 7...same problem. P3D is not on the new build, just FSX.

 

This is a clean install of FSX acceleration...no addons, so nothing. Tried Nvidea inspector and some of the common tweaks, same problem before and after. Very simple:

Starting up get the fps I would expect, in the 50's. Have it fixed at 60. After almost a minute (and the same timing every time, so very repeatable), fps just drops to nothing. 20's, then some spikes at 8...teens...does this for about 30 secs, then back up to 50's. minute later, same thing.

 

In Win 7 this corresponded with spikes in all threads (have tried turning off HT too and didn't work) that were running FSX. Interestingly, same drop in fps in win 8, but the CPU does not max out. HD is not running when it happens. Doesn't matter how high it goes...if I lower the sliders and get fsp in the 70's, still drops to single digits.

 

Assume its in the GPU and will eventually try another one to confirm that, but hoping someone has a clue. I've tried everything I know.

 

Thanks in advance,

Jim

Share this post


Link to post
Share on other sites

Hi guys:

 

I read through this as I too am having problems with a GTX770 that are killing me. New rig, I7 4770 with the video card. Had problems when it was Win 7 and tried everything, then just upgraded to Win8 and same problem. P3D in Win 7...same problem. P3D is not on the new build, just FSX.

 

This is a clean install of FSX acceleration...no addons, so nothing. Tried Nvidea inspector and some of the common tweaks, same problem before and after. Very simple:

Starting up get the fps I would expect, in the 50's. Have it fixed at 60. After almost a minute (and the same timing every time, so very repeatable), fps just drops to nothing. 20's, then some spikes at 8...teens...does this for about 30 secs, then back up to 50's. minute later, same thing.

 

In Win 7 this corresponded with spikes in all threads (have tried turning off HT too and didn't work) that were running FSX. Interestingly, same drop in fps in win 8, but the CPU does not max out. HD is not running when it happens. Doesn't matter how high it goes...if I lower the sliders and get fsp in the 70's, still drops to single digits.

 

Assume its in the GPU and will eventually try another one to confirm that, but hoping someone has a clue. I've tried everything I know.

 

Thanks in advance,

Jim

 

Have you monitored the GPU temps while this happens?  I'm wondering if maybe the heatsink isn't installed right and the GPU is overheating, throttling, overheating etc. 

 

Another thought is to make sure the ancillary power connectors on the GPU are properly connected...I've seen serious throttling happen when someone forgot to connect the PSU pigtails to the two connectors on the video card.

 

Regards

Share this post


Link to post
Share on other sites

GPU throttling? Heat issue? Graph your GPU temps.

 

(whoops! Somebody beat me to it!)

Share this post


Link to post
Share on other sites

×
×
  • Create New...