View Full Version : GPU Memory speed drops by 50% after I install the nVIDIA Driver

10-25-2013, 04:33 PM
I just did a clean install of Windows 8.1

I checked GPU-Z before I install any drivers, the memory speed was 2000 Mhz.

After I installed the latest nVIDIA Driver from ASUS vV9.18.13.1193

I noticed the memory speed of the GPU dropped by half to 1000 Mhz.

what the heck?

Why is that? I have the latest Power 4 Gear Hybrid on Performance plan but that doesn't change it

I also ensured that in 3D Settings it is not set to Adaptive but rather to Performance

can anyone check in GPU-Z and tell me what is their memory speed?


10-25-2013, 06:04 PM

10-25-2013, 06:14 PM
I get 1000 as well, with latest drivers. Probably gpu-z was misreading it for you before. I haven't noticed any drop in performance.

10-26-2013, 04:34 AM

10-26-2013, 05:26 AM
http://imageshack.us/scaled/thumb/31/s80k.png (http://img31.imageshack.us/img31/1666/s80k.png)

Version 331.58 - WHQL

10-26-2013, 06:39 AM
http://imageshack.us/scaled/thumb/31/s80k.png (http://img31.imageshack.us/img31/1666/s80k.png)

Version 331.58 - WHQL

but that's overclocked bro right? I am talking about the default memory speed why it droped from 2000 Mhz. to 1000 Mhz. :(

10-26-2013, 06:49 AM
Ok I installed the 331.58 Drivers from nVIDIA but the memory speed is still 1000 Mhz.

Why was it @ 2000 Mhz. before I install any driver then?

after I rebooted, the computer wouldn't even boot and gives me a black screen, after a few failed attempts, Windows 8 started the recovery options.

that is why I was hesistant to install nVIDIA's buggy drivers and always stick to ASUS

10-26-2013, 07:08 AM
This is how GPU-Z looks without installing any nVIDIA Driver


10-26-2013, 09:20 AM
Put some load on that video card, it will pick up the memory.

When you have **** for drivers (ie windows default garbage) they work as good as a sandbox shovel in winter snow - they throttle at 2k and probably pick up to 4 under load. With asus drivers, throttle without load is greater - ei better performance... I think with proper drivers, its throttled back to 1000 (in my case to 1620 if you look at my screenshot). When i put some load, whole thing pick up... And that driver is not buggy by any means, trust me. That is a full certified release.

And no. that is not overclocked.

10-26-2013, 11:00 AM
Have a read here - http://www.geeks3d.com/20100613/tutorial-gpu-tools-and-gpu-memory-clock-real-and-effective-speeds-demystified/. As I said, the card performance hasn't changed, just the number gpu-z shows, for some reason. Before you were seeing the ddr effective rate, now you're seeing the actual clock, it seems.

10-26-2013, 11:58 AM
AH OK, thanks a lot man for making my mind at ease I was thinking something was wrong. i gave you a rep point

10-26-2013, 12:16 PM
Thanks mate. As the 770M has GDDR5 memory, programs should either be showing the 1000mhz real clock, or 4000mhz effective rate. Not sure why you were seeing 2000mhz before, probably an issue with gpu-z itself (old version perhaps?). In any case, nothing to worry about.