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-   -   7970 CF issues (http://www.nvnews.net/vbulletin/showthread.php?t=171785)

Rollo 01-09-12 06:30 AM

7970 CF issues
 
http://pcper.com/reviews/Graphics-Ca...ysis-and-Concl

Quote:

We have to comment on our CrossFire issues in this article and of course point out that these are NOT XFX's fault. Instead, we seem to have found a fault with the AMD drivers and its QA program. The problem of not seeing any scaling at 2560x1600 in Battlefield 3 (and ONLY 2560x1600) while seeing no scaling in Batman: Arkham City, crashes at 2560x1600 in Skyrim and the large dips in frame rate in Deus Ex: Human Revolution are pretty dramatic and damning for the brand new architecture.

Please keep in mind that we tried more than our fair share of fixes to try and get these errors corrected even to the point of using a completely different motherboard and system. It was all consistent, and it was all repeatable. When we asked AMD about the issues they basically told that since not many people had a pair of these cards to do CrossFire testing yet, these things weren't out of the ordinary.
Way to reward your best customers AMD- rigs that don't work in four of the hottest games of the holiday season. :(

NOTE: It appears the CF scaling issues may be limited to 16:10 aspect ratios (e.g. 25X16) and isolated games (e.g. Skyrim).

NOTE 2: Timing and driver revision is always a factor in cases like this, Guru3d got some nice scaling in several games in their 7970 CF review. I wouldn't say 7970 CF (or CF in general) is at the level of SLi, but Guru3ds results are promising. :)

Johnny C 01-09-12 07:51 AM

Re: 7970 CF issues
 
Quote:

Amateur review. Guru3d, Hardwareheaven among others had no issues with Crossfire in any of the games you did. sad to see a reviewer who cannot set up his system blame it on drivers. 7970 is amazing and fastest card in the world, improve your review skills for the future
Taken from that page about 5 posts down in the comments....

http://www.guru3d.com/imageview.php?image=35482

http://www.guru3d.com/imageview.php?image=35473

http://images.hardwarecanucks.com/im.../HD7970-43.jpg

Deus Ex really needs crossfire scaling @ 2560x1600 where the minimum is 55fps

I also love how you left out that in Skyrim a single 7970 is faster than a GTX 590 at both 1920x1080 and 5760x1080. Acutally the 580 is faster than the 590 in skyrim too, I bet all those 590 owners are really disappointed nVidia hasn't fixed the scaling in skryim since they've had since 11.11.11 to do it.

It is worth pointing out that TPU did have some of the same scaling issues at 2560x1600 resolution only...whereas G3D did not have the issue.

Ninja Prime 01-09-12 11:15 AM

Re: 7970 CF issues
 
Spin rollo spin! Maybe if you can survive 6 months or so of AMD being on top, then you can feel good about yourself again, because the company you sold yourself to will be on top. :(

Roadhog 01-09-12 11:23 AM

Re: 7970 CF issues
 
Has nvidia fixed this yet Rollo?

http://www.pcper.com/news/Graphics-C...e-GeForce-GPUs

Rollo 01-09-12 11:59 AM

Re: 7970 CF issues
 
Quote:

Originally Posted by Roadhog (Post 2518322)

What does that have to do with the OP? :confused:

And, "You're welcome". ;)

Roadhog 01-09-12 12:01 PM

Re: 7970 CF issues
 
Quote:

Originally Posted by Rollo (Post 2518344)
What does that have to do with the OP? :confused:

And, "You're welcome". ;)

Welcome for what?

Mojoe 01-09-12 12:04 PM

Re: 7970 CF issues
 
What a great card (nana2)

Quote:

We are now seeing performance compared to a standard HD 7970 clock speed to be around 30% faster. This is a significant performance boost that will allow you to run at higher settings versus a standard HD 7970. On top of that, the performance between the overclocked HD 7970 and Galaxy MDT GTX 580 has also widened quite a bit. Our jaw dropped when we experienced 80% better performance in Deus Ex: Human Revolution compared to the MDT GTX 580.
http://www.hardocp.com/article/2012/...mance_review/1

Rollo 01-09-12 12:27 PM

Re: 7970 CF issues
 
Quote:

Originally Posted by ViN86 (Post 2518348)
Right, this was only to "notify" people...

My crystal ball tells me I'll be locking this thread within 24 hrs...

That's interesting.

Two major review sites report major CF issues with several games that are currently VERY popular.

I dispassionately report it in an effort to assist the gaming community, and your going to try and sweep the issue under the rug by closing the thread or deleting it? What if it's resolved, where will we post?

AMD themselves admitted the problem to PC Perspective.

Mike Chambers has always seemed like a "good guy" when I've spoken with him, I can hardly believe his site would try to keep information from it's members. :confused:

Yep, my guess is Mike would have reported this himself had he seen it first. He wants to help his members.

What's your reasoning the information should be hidden?

ViN86 01-09-12 12:34 PM

Re: 7970 CF issues
 
Quote:

Originally Posted by Rollo (Post 2518363)
That's interesting.

Two major review sites report major CF issues with several games that are currently VERY popular.

I dispassionately report it in an effort to assist the gaming community, and your going to try and sweep the issue under the rug by closing the thread or deleting it? What if it's resolved, where will we post?

AMD themselves admitted the problem to PC Perspective.

Mike Chambers has always seemed like a "good guy" when I've spoken with him, I can hardly believe his site would try to keep information from it's members. :confused:

Yep, my guess is Mike would have reported this himself had he seen it first. He wants to help his members.

What's your reasoning the information should be hidden?

I don't have an issue with the information. The issue is that I am often cleaning up your threads/posts in this subforum.

Roadhog 01-09-12 12:40 PM

Re: 7970 CF issues
 
I wonder why he never made a thread about the BF3 issue. Straight unplayable seems like a much larger issue than no crossfire scaling but still playable to me.

Obvious trollo is obvious.

ViN86 01-09-12 01:06 PM

Re: 7970 CF issues
 
I deleted our previous posts but left the last two as a summary. My intent was not to derail the thread, which after re-reading, I did. We can continue this discussion via PM.

Rollo 01-09-12 01:16 PM

Re: 7970 CF issues
 
Quote:

Originally Posted by Roadhog (Post 2518369)
I wonder why he never made a thread about the BF3 issue. Straight unplayable seems like a much larger issue than no crossfire scaling but still playable to me.

Obvious trollo is obvious.

Actually I forwarded it to Nvidia because you made me aware of it. (before you posted this) If they have a fix, I'llpost it. Do not have the game to test.


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