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can I force pcie 2.0 on r9 270 ?

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  • Graphics Cards
  • Graphics
Last response: in Graphics & Displays
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June 22, 2014 4:13:52 AM

Hello all, i m french and post on french site but didn't got any answer so i post here, i use R9 270 on Mother board with pcie 2.0 so video card work on pcie 2.0 and everything is ok on all game except one, trackmania forever, a directx9 game, at each end of race my pcie go on pcie 1.1 and i loose my framerate a lot, i have to switch with alt-enter 2 time and my video card understand i m in 3D mode and go back to pcie 2.0
Does anyone know if i can force my video card to stay on pcie 2.0 with no return on pcie 1.1 ?

Thx

More about : force pcie 270

June 22, 2014 4:34:15 AM

I know it switch to pcie 1.1 with GpuZ, i dont use any software to switch with alt-enter, its windows command to switch windows mode and full screen mode. My mother board is Asus M4A79XTD EVO, there is no setting in MB bios to force pcie 2.0, i get last bios, test with all driver and same issue, i m on Win7 64 bits.
I just want to know if there is a setting to put in registry system or a command to put in XML u can find in ATI/ACE folder or a tweaking prog or other to force my video card to run on pcie 2.0 with no return to pcie 1.1 ??
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June 22, 2014 5:18:51 AM

first thx for ur interrest to my thread, so, its not a reporting error from Gpu-Z, video card go on pcie 1.1 in 2D mode and go to 2.0 when i run 3D application or game. So i will try to explain better with my poor eng... I start trackmania forever and everything is ok i m on 150 fps and pcie2.0 mode, i run on track and everything ok until i reach the end, after this my framerate drop to 80 fps with lot of lag, and gpu-Z show me i m on pcie 1.1 and stay on this until i push alt-enter to switch windows and full screen mode and after that video card return to pcie 2.0 and 150 fps, my old HD6850 never mad that, i dont understand all games work fine, i get this trouble only on this game.. for example I run watch_dogs in high setting with 50 fps (with HD6850 30 fps), no return to pcie 1.1 all is fine...
force video card to stay on pcie 2.0 is really not possible ?
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June 22, 2014 9:27:39 AM

without bug :

With bug pcie 1.1:


FPS are left corner screen

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a b U Graphics card
June 22, 2014 10:14:30 AM

PierreKail said:
without bug :

With bug pcie 1.1:


FPS are left corner screen



It is natural behaviour of the gpu, it downclocks when it is not needed.

To override it:

Go into control panel under windows and set power profile, under advanced settings turn off link state power management.

Install msi afterburner, enable unofficial overclocking without powerplay support, and disable ULPS.

See if it helps.
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June 23, 2014 4:07:23 AM

Thx for ur reply i have already turn off link state power management, my card is a VTX3D but i will try with msi afterburner and say if it helps.
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June 23, 2014 4:46:27 AM

Have try with afterburner who work with my VTX3D card, have disable ULPS and restart computer but same issue, i will try with other setting in afterburner, test lot of thing and say if pb solved later, thx.
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a b U Graphics card
June 23, 2014 7:06:08 AM

PierreKail said:
Have try with afterburner who work with my VTX3D card, have disable ULPS and restart computer but same issue, i will try with other setting in afterburner, test lot of thing and say if pb solved later, thx.


Curious...

Have you installed the newest bios update for your motherboard?


There should also be amd chipset drivers, see if you have the most up to date.
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June 23, 2014 7:30:38 AM

Yep have newest bios 2102 version 2010/07/30 release... no newest bios since this date :
http://www.asus.com/fr/Motherboards/M4A79XTD_EVO/HelpDe...
Win7 64 bits check.
I agree its really curious coz all games work fine out of this..
I m just unlucky i suppose..
Maybe i can put comand in XML u can find in ATI/ACE folder where u can set Mhz and voltage but didnt found anything about pcie comand in this.. maybe in windows registry but also not found..
I m also on last 790x chipset driver. 14.4 release.
If u or someone else have other idea i take it !! I just keep searching, if i find something i will tell here, thx to u anyway :) 
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