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keep 7990 or go 780ti

I'm hopping it's windows driver certification for amd as stated by ltmatt.
I'm using a3770 k with a saber tooth mb and agility add so I would think they should be ok? Looking st second hand priced I should be able to swap for a ti.

Delete the block certificate as i linked to in that thread, then install the 13.12 WHQL drivers.
 
the 7990 is a good card, if you can sort out driver issues id keep it unless you've had enough.

As pointed out if you decide to sell they go for a lot of money at the minute and would finance an NVidia card.
 
I'm averaging on multiplayer BF4 around 65fps, that's at 5760x1080, ULTRA, 2xMSAA and HBAO. 4xMSAA seems to lose around 20% performance and for the benefit I see, not worth it.
 
Delete the block certificate as i linked to in that thread, then install the 13.12 WHQL drivers.

I deleted the blocked cert, managed to install 13.12, but performance was very choppy with fps 35-55 average. My card is hardly used, maybe a hour every couple of days so had little use, id be surprised if it were faulty.
Now I've done a full clean install of windows 8.1 and currently installing bf4 again.
The way its behaving is as if crossfire has been disabled, but msi af is showing both clocks at my overclock speed!!!
I have just run heaven 4 at 8xmsa and got a score of 1856 @ 72fps, i'm sure I was getting in the 80's before.
Anything else I may have missed, ive also set pci in bios to gen3.
 
I deleted the blocked cert, managed to install 13.12, but performance was very choppy with fps 35-55 average. My card is hardly used, maybe a hour every couple of days so had little use, id be surprised if it were faulty.
Now I've done a full clean install of windows 8.1 and currently installing bf4 again.
The way its behaving is as if crossfire has been disabled, but msi af is showing both clocks at my overclock speed!!!
I have just run heaven 4 at 8xmsa and got a score of 1856 @ 72fps, i'm sure I was getting in the 80's before.
Anything else I may have missed, ive also set pci in bios to gen3.

Sounds like you need to read this thread.

http://forums.overclockers.co.uk/showthread.php?t=18544020
 

Crossfire defo working, checked with ccc amd msi af. Strange thing though, when i have vsync on the fps are between 30 and 55 aprox and really badly stuttering. When i switch vsync off my fps are 100+ and smooth, but i get bad screen tear.
I've never had an issue with vsync before, the only frame drop that would occur before my current problem was in certain places on certain maps......i have noticed that my refresh rate on BF4 is no longer 60hz but 59.94hz, could this be the issue?
 
Crossfire defo working, checked with ccc amd msi af. Strange thing though, when i have vsync on the fps are between 30 and 55 aprox and really badly stuttering. When i switch vsync off my fps are 100+ and smooth, but i get bad screen tear.
I've never had an issue with vsync before, the only frame drop that would occur before my current problem was in certain places on certain maps......i have noticed that my refresh rate on BF4 is no longer 60hz but 59.94hz, could this be the issue?

Try creating a profile in CCC for the BF4 64bit exe, then disable frame pacing and click save. Does this get rid of the stutter? I think there is a bug with BF4 and Vsync that is under investigation between AMD/EA. I reported it a while back and the cure was to disable frame pacing if using Vsync in this title. If after doing that you still have it, try these slightly older drivers.
 
Try creating a profile in CCC for the BF4 64bit exe, then disable frame pacing and click save. Does this get rid of the stutter? I think there is a bug with BF4 and Vsync that is under investigation between AMD/EA. I reported it a while back and the cure was to disable frame pacing if using Vsync in this title. If after doing that you still have it, try these slightly older drivers.

Cheers LtMatt, almost a steady 60 fps, with just a few spikes now and again so you've cured it. Only taken me 3 days of utter frustation to get it righ/playable though!!!
It must be windows 8.1 and frame pacing thats the problem, as i didn't have this issue when i was using win 7.
 
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Is windows 8.1 really that bad with this? i was going to upgrade to it soon but having second thoughts not when i read some of these issues.
 
If you'd have an Nvidia card you'd never need to do these tweaks etc :P

The problem isn't just BF4, it is all future games that you might have to tweak to get it working. No way to know beforehand.

Now bring on the hate.
 
Cheers LtMatt, almost a steady 60 fps, with just a few spikes now and again so you've cured it. Only taken me 3 days of utter frustation to get it righ/playable though!!!
It must be windows 8.1 and frame pacing thats the problem, as i didn't have this issue when i was using win 7.

Correct. I'm on at AMD to fix this issue, don't worry.
 
Cheers LtMatt, almost a steady 60 fps, with just a few spikes now and again so you've cured it. Only taken me 3 days of utter frustation to get it righ/playable though!!!
It must be windows 8.1 and frame pacing thats the problem, as i didn't have this issue when i was using win 7.

windows 8 really is gash. I'll be sticking to Win 7 until the next windows comes out without all the stupid bells and whistles for touch screen usage.
 
Id be upgrading from 7....to be honest iv never really been that interested in 8 and wondered if its just better waiting for version 9.
 
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