Please reinstall your operating system after making any major hardware changes. From my experience, any attempt at troubleshooting is usually a lost cause otherwise (and a fresh start is always nice). Also, you say you acquired the new card "months back" - have you been living with this issue that long, has it suddenly popped out of nowhere, or have you only recently installed your new graphics card?

To be fair, from the information given (especially the inventory bit), I'm not convinced this is a GPU transfer issue - your PCI-E bandwidth would have to be ludicrously crippled for you to feel any loading performance issues, pointing to either a motherboard glitch (quite unlikely, but why not since your drivers are not up to date) or a graphics card defect (unlikely, but not impossible).

If you want to be sure, you'll need to go through a complete system diagnostic, analyzing each component individually (there are CUDA-based tools out there to measure your CPU-GPU transfer performance, have you used them to confirm your doubts?)

Please reinstall your operating system after making any major hardware changes. From my experience, any attempt at troubleshooting is usually a lost cause otherwise (and a fresh start is always nice). Also, you say you acquired the new card "months back" - have you been living with this issue that long, has it suddenly popped out of nowhere, or have you only recently installed your new graphics card?

To be fair, from the information given (especially the inventory bit), I'm not convinced this is a GPU transfer issue - your PCI-E bandwidth would have to be ludicrously crippled for you to feel any loading performance issues, pointing to either a motherboard glitch (quite unlikely, but why not since your drivers are not up to date) or a graphics card defect (unlikely, but not impossible).

If you want to be sure, you'll need to go through a complete system diagnostic, analyzing each component individually (there are CUDA-based tools out there to measure your CPU-GPU transfer performance, have you used them to confirm your doubts?)

Yes this problem has been since I installed the new card (1-2 months ago). It didn't bother me much as it only lagged alot when it was loading stuff but doesn't affect the framerate at all when it has loaded everything necessary, but if there is any data loaded to the card it lags. Like my 3D app which I made for testing lags when loading data to the GPU, and any 3D game which uses videocard memory.

I haven't heard of the GPU-CPU testing tools but I'll look for that, thanks for the advice

EDIT: I updated motherboard drivers but it didn't help, still lags if games load new data to the card's memory

Sorry for bringing up this old topic but I've made some progress with this matter..

Yesterday I noticed there were Nvidia updates available but my nvidia control panel didn't inform me automatically for some reason. So I patched the videocard drivers off the site and it worked *perfectly*, loading was smooth and fps was even better than normally.
...But after 4 or so hours the poor performance and fps drop came back. Today I noticed there was another nvidia patch which was released yesterday and I haven't downloaded that, so I installed that too and everything runs smooth again. Hoping it does last and not lose performance again.

Why did the patching fix the problem for a while but then it came back?
I can only imagine something is messing up driver files or something

That, or the patch was buggy so they rushed out a fixed version.

My money is on NVIDIA playing around with their over-agressive power saving again. They seem to do that every year-and-a-bit or so, and there's always been trouble while things are shaking out (280 drivers, anyone?)

Please reinstall your operating system after making any major hardware changes.

IMHO any one who recommends a full reinstall of the OS to fix an issue ( especially hardware ), has no clue what they are doing.
Only time that is really necessary is when the OS is so buggered up, it fails to load, or continually has critical OS related errors.

As far as the video card, you found the issue was bad drivers. The power supply that is recommended to use with that is 550w or greater.

IMHO any one who recommends a full reinstall of the OS to fix an issue ( especially hardware ), has no clue what they are doing.
Only time that is really necessary is when the OS is so buggered up, it fails to load, or continually has critical OS related errors.

Please reread my quote. I did not say "reinstall your OS if something goes wrong". I said "reinstall your OS after making any major hardware changes", this includes changing graphics cards, possibly processor, and new motherboard. There are two reasons: one, your old OS may have residual old driver parts, which, while not posing a problem most of the time, can get in your way when changing hardware (particularly when you switch ati -> nvidia and vice versa, in the past this has been a problem with Windows). Secondly, it gives you an opportunity to start fresh, which is always welcome, particularly with Windows (the newer versions are much better in this regard, but eventually you just get lots of things that just "creep in" your system, things like frameworks, one-time codecs, etc...)

Obviously, reinstalling the OS when you encounter a non-critical issue without changing any hardware is not very useful and won't do anything in general. I think everyone is aware of that

IMHO any one who recommends a full reinstall of the OS to fix an issue ( especially hardware ), has no clue what they are doing.[/quote]
+1
seriously

Obviously, reinstalling the OS when you encounter a non-critical issue without changing any hardware is not very useful and won't do anything in general. I think everyone is aware of that

Except for the IT in our company...

The card works now as it's supposed to work, so I guess the problem was with the bad drivers. But if the problem comes back I'll probably reinstall windows and if that doesn't help then I'll try the videocard on a different PC

EDIT: It bugged again, fps dropped like 30-40 from 70 and everything loads slow again. Time for formatting.. this is starting to get annoying..

EDIT2: Re-installed Windows.. everything went normal, updated all drivers to the latest versions. Now I'll see if the GPU works normally...