***M18x - AMD Crossfire (Driver Questions, Performance, Problems) Discussion Thread***

[Mr. Fox]

Has anyone tried the Catalyst 12.5 beta yet? It seems the be the only one providing a reasonable degree of support for 7970M CF.

[Juscallmesteve]

Use Mr. Fox's 24/7 xfire enable by reg editing

6990M Crossfire Guide

It worked for me and i get about an avg of 70+ drops some times to 60 and up to over 100 at times but avg is in the 70's



There is my Unigine Heaven Score

[Mr. Fox]

Nice score, Steve. Good job. Glad my tweaks are working good for you.

Feel free to post this Heaven score in the *OFFICIAL* Alienware M18x Benchmark Thread - Part 2

Here is a side-by-side comparison between your system and Speedy's. Have you tried any overclocking yet? (I think this is why Speedy's is higher.) Result

[Peter]

Use Mr. Fox's 24/7 xfire enable by reg editing

6990M Crossfire Guide

It worked for me and i get about an avg of 70+ drops some times to 60 and up to over 100 at times but avg is in the 70's



There is my Unigine Heaven Score

Nice score, Steve. Good job. Glad my tweaks are working good for you.

Well i have followed mr.fox tweak but now both gup utilize but only use 50% each gpu so at end ive only gettin 42fps Gpu use never goes more then 50% :S now even i ve forgot which regedit ive change to 1 :S how can i move back

[Mr. Fox]

Well i have followed mr.fox tweak but now both gup utilize but only use 50% each gpu so at end ive only gettin 42fps Gpu use never goes more then 50% :S now even i ve forgot which regedit ive change to 1 :S how can i move back

50% utilization and 42 FPS in what game or benchmark? You can expect very erratic results... seems like everyone is finding a mixed bag. Some games may not even identify the GPU at all, and may give you less than 42 FPS.

I don't think any system with 7970M CrossFire is going to function correctly until AMD releases drivers that properly support it. This is common for a new GPU release.

As far as the tweak go, you have several options. You try a system restore to revert to the old settings, or simply change the DWORD values back to what they were before you changed them.

Worse case scenario, uninstall the Catalyst package, run DriverSweeper and CCleaner in safe mode and reinstall the Catalyst package. The tweaks are not persistent between driver installations, unfortunately. You have to reset everything all over again when updating drivers.

[Peter]

Im getin it with Crysis 2, before only one gpu 1 utilize at 97% and gpu 2 at 0%, after changin regedit both gpu usage stays at 50%. well now im in trouble ive still didnt create system restore and i dont have AMD crossfire driver for 7970M
Another question do you have idea which regedit valve was 0 and 1? csoz when ive changed it some were 1 and few 0.

[Mr. Fox]

Im getin it with Crysis 2, before only one gpu 1 utilize at 97% and gpu 2 at 0%, after changin regedit both gpu usage stays at 50%. well now im in trouble ive still didnt create system restore and i dont have AMD crossfire driver for 7970M
Another question do you have idea which regedit valve was 0 and 1? csoz when ive changed it some were 1 and few 0.

Which keys did you change DWORD values? EnableULPS, EnableCrossFireAutoLink, or both? There is no way to know unless you kept a record of it or backed up the keys for reference.

You can get the driver off your system resource CD or download this one: M18x-R1 with 7970M CrossFire (which I understand works better).

This may be an issue that affects only Crysis 2. It would not be an uncommon phenomenon to be a game-specific issue, with a new GPU especially. Have you experienced the same problem in multiple games? I would check that out before deciding what action to take.

ok the drivers im using are the ones i listed... the 12.5 beta drives! the 3dguru ones sucks... stay far away from them! mods? no mods.. slight over clock and gpu over clock. thats all..

the 12.5 beta driver ae the way to go for now. there the best ones at the momment. but there not perfect/ just semi stable.. enough to do certain things. But cf on most things does not work still.

[Peter]

ive just changed Enablecrosssfireautolink only not Enableulps, as it may affect only crysis 2 only, as ive didnt played anyother game yet so i cant more comment on it.
But ive remember that i did changed about 4 EnableCrossFireAutoLink values to 1 but dont know which four of them :S

**Edit

Well ive just restart system and values of EnableCrossFireAutoLink back to 0 as it was, ive double check it with my M18x R1 with dual 6990m X regedit values and both contains same values, again run Crysis 2, same result as before only Gpu 1 usage at 97% and gpu 2 at 0%

[amosingh]

I've been using 12.4's for a while now, no problems. Did you completely uninstall your old drivers before installing the 12.4 drivers?

yeah i did full driver sweeper after uninstall, i might try and fresh install 12.4 again. might just be bad install.

[Soul Reaver]

Hi Guys

So the engineer came and installed a new crossfire cable and now I can activate my crossfire Yay hurray

What should I benchmark my machine with please? I shall put the spec in my sig but I have twin 7970s with a 3920 R2 chip and an SSD

Mark.