ATI 6870 not overclocking (Low FPS)

[Phazon]

A simple fix has been discovered to fix the clockspeed issue. It is because of the flash Ubisoft logo video that plays when you start the game which confuses the card.

Simply rename or delete the Ubisoft logo video found in \Steam\steamapps\common\il-2 sturmovik cliffs of dover\parts\core\GUI.

It has fixed the issue for my HD4870 and alot of other AMD users!

[Thee_oddball]

Originally Posted by Phazon

A simple fix has been discovered to fix the clockspeed issue. It is because of the flash Ubisoft logo video that plays when you start the game which confuses the card.

Simply rename or delete the Ubisoft logo video found in \Steam\steamapps\common\il-2 sturmovik cliffs of dover\parts\core\GUI.

It has fixed the issue for my HD4870 and alot of other AMD users!

now give credit where credit is due Phazon

BTW if you have the russian version you dont have this problem.....because there is no UBISOFT logo

[Phazon]

I didn't claim it was me who found out, just spreading the word.

[Blackdog_kt]

Originally Posted by Phazon

A simple fix has been discovered to fix the clockspeed issue. It is because of the flash Ubisoft logo video that plays when you start the game which confuses the card.

Simply rename or delete the Ubisoft logo video found in \Steam\steamapps\common\il-2 sturmovik cliffs of dover\parts\core\GUI.

It has fixed the issue for my HD4870 and alot of other AMD users!

Woot! I'm off to try this.

I have a 4890 which used to run at 240Mhz, after the latest beta patch it runs at 500Mhz. The maximum factory specified clock speed is 850 Mhz.

I set it to 850Mhz with Ati tray tools and got 30 or so extra FPS, but i don't know what else to change there (fan profiles, voltage, etc) so it ends up crashing and rebooting my PC after 40 minutes or so. I guess the catalyst drivers automatically take care of these things, because it uses 850Mhz on all of my other games without any problems.

If you solution works then the sim is fully playable for me. I'm currently getting 20-30 FPS with the GPU at 500Mhz and 50+ FPS if i run it at 850Mhz. While 30 is very playable for me, it gives less of a margin for them to drop when there's a lot of things suddenly happening at once on the screen. On the other hand, 50 is just great as i'm limited to 60 FPS anyway due to having Vsync on and a 60Hz monitor.

I'm off to try it, wish me luck

[Orpheus]

Did it work Blackdog? Interested to see if my fix works for all the ATI cards suffering the underclocking issue, the more positives we can get the better!

[Blackdog_kt]

So, i renamed the video file containing the animation of the Ubi logo and had a go late last night. I didn't have time to do in-depth tests, just a quick go in the low altitude bomber intercept mission.

Long story short, i can't really verify it but it seems to work.

To be more precise, when i alt-tab out of the sim to check what CCC says my clock speeds are, it shows it's underclocked to 240Mhz. However, when in the sim it's noticeably smoother than before.

My suspicion is that getting rid of the logo lets the drivers recognize there's a game running and from that point on, it dynamically throttles the GPU up/down as needed, clocking up when in-game and undeclocking it back down once i alt-tab to the desktop.
I mean, i do get the 240Mhz indication in the CCC when i alt-tab out of CoD, but when actually flying i was getting an average of 24FPS with a maximum of 50 (as displayed by the in-game fps counter). I think it was also a bit misleading as i ran the mission for just one or two passes and that included the initial merge where all the textures load, so the sample range was a bit "biased" to the low side. If i had played through it for 10 minutes or so i guess the average would be around 30-35 FPS as it certainly hovered around 30-40 FPS for the remainder of the mission with maximum in the 50s, compared to 25FPS with a maximum of 30+ before renaming the video file.

This is still lower than what i got by forcing 850Mhz via the Ati tray tools (that gave me an almost constant 40 FPS all the way into the high 50s), but it's still a perfectly working solution.

The biggest improvement was that it completely eliminated the stutters that used to happen as the textures loaded the first time i would approach bombers or go to zoom view.

Until the sim is further optimized, this temporary workaround gets a thumbs up from me. Just remember to go back and rename the video file again after each patch or whenever you verify the integrity of the game files via Steam, because it will revert it to its default state.

[Dokuro]

Hello, excuse me for my english, I have the same ring than orphéus

core I5 2.7 Ghz W7 64b 4 GB RAM and two ATI 5770 1 GB in CROSS OVER

and it's works very well for me ...

from 15 20fps to 30 40 fps with no stutters

by

[Renny]

Originally Posted by Phazon

A simple fix has been discovered to fix the clockspeed issue. It is because of the flash Ubisoft logo video that plays when you start the game which confuses the card.

Simply rename or delete the Ubisoft logo video found in \Steam\steamapps\common\il-2 sturmovik cliffs of dover\parts\core\GUI.

It has fixed the issue for my HD4870 and alot of other AMD users!

OMG THIS IS THE BEST ADVICE that made a big improovement...fps upfrom 22 to 60 no stutters you are a star..


works on latest Beta too

forever in your debt

DEVELOPERS PLEASE FIX THIS IN NEXT PATCH