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[PCWORLD] AMD provides a sneak peek at its Radeon HD 7990

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I'm sure the people who've had CF 7xxx since last January feel much better knowing that after over a year things may start to happen for them.

Yeah, because CF has been totally broken and unfix-able in all that time. you are like a broken record repeating the same mantra over and over again and you don't even have experience of CF.

Crossfire is far from perfect, but it isn't an utter unfix-able mess that you and many others seem to want to believe it is. I have posted charts for you to prove CF is not unfixable yet you only seem to find fault.
 
Yeah, because CF has been totally broken and unfix-able in all that time. you are like a broken record repeating the same mantra over and over again and you don't even have experience of CF.

Crossfire is far from perfect, but it isn't an utter unfix-able mess that you and many others seem to want to believe it is. I have posted charts for you to prove CF is not unfixable yet you only seem to find fault.

Actually, CF Eyefinity was broken for 9mths, however it appears the fix wasnt really a fix at all!
 
Actually, CF Eyefinity was broken for 9mths, however it appears the fix wasnt really a fix at all!

I don't have eyefinity, so I can't possibly comment. All I know is that 2x HD 7950 in Crossfire are giving me a definite performance boost with very smooth game-play. In most games I have to create a custom profile in RadeonPro to get the best out of Crossfire but it isn't rocket science. In fact I do the exact same thing using Nvidiainspector when I have Nvidia cards. I'm sure almost every single person here has used 3rd party tools to create game profiles to get the best from their GPUs.

Yes Crossfire has problems, some of which are serious. But it isn't totally useless and hasn't left most CF users with unusable broken systems since January.
 
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I'm sure the people who've had CF 7xxx since last January feel much better knowing that after over a year things may start to happen for them.

wrong.

bought a pair of 7970 january this year with the latest 13.2 driver thinking amd had a whole year to iron out crossfire. same bs issue as those folks who bought them last january a year ago.

amd crossfire is still broken. 🙁
as for the radeon pro, vsync, buffering. those are pathetic bandages - not true fix.

took a $200 hit reselling that pair of 7970.



single gpu. great value.
multi gpu. steer clear of cross-broke.
 
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wrong.

bought a pair of 7970 january this year with the latest 13.2 driver thinking amd had a whole year to iron out crossfire. same bs issue as those folks who bought them last january a year ago.

amd crossfire is still broke. 🙁
as for the radeon pro, vsync, buffering. those are pathetic bandages - not fix.

too a $200 hit reselling that pair of 7970.



single gpu. great value.
multi gpu. steer clear of cross-broke.

I'm sorry you had issues but just because you couldn't fix your Crossfire problems does not = not fix-able. Yes many had issues but that does not apply to everyone, so blanket statements by you, Bela or anyone else cannot be taken as gospel. This also applies to me, just because I can fix the CF issues to my satisfaction most of the time does not mean everyone else would be happy with my results. My issue isn't Bela saying CF sucks or is a stuttery mess, it is the blanket statement that all CF = bad since last January for all CF users.

Here are a couple of frame-time graphs taken using 2x HD 7950s in CF. I use RadeonPro to set vsync and triple buffering on and also set link FPS to monitors refresh.

2560x1600
HD 7950s in CF @ 1100/1450

Tomb Raider
Ultra setting but with shadows set to Ultra (they are high in Ultra preset). DOF off

The high spike at around 12 seconds was caused when I was close to Lara while she climbed an obstacle. TressFX in close up 🙂
TRUltraUltraShadowsDOFOff7950CF_zpsf30fd3c4.jpg


Hitman Absolution (this was taken with both 7950s at 1000/1450)
Ultra setting, 2x MSAA, Bloom off and DOF off.
HMAUltraBloomoffDOFoff2xMSAA7950CF_zps589ae2a5.jpg
 
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ICDP, vysnc + triple buffering is awful, sorry.

Only in your opinion, how is that not sinking in? I can't stand screen tearing so I feel vsync is a must. That is the point I am making, you cannot make blanket statements that CF has sucked since January last year for everyone based on your subjective opinion. Many people have been happy with their CF setups and you cannot tell them they are wrong.

CF does stutter, only a fool would say it is perfect out of the box. I can fix CF to my satisfaction (with or without vsync) but as UaVaj proves not everyone will be happy with the fixes available.
 
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Dips to 26 fps with CF is awful, probably felt more like 13 fps, high stress areas are going to cause you to flip flop between 60 and 30 fps, meanwhile with a single card you could eliminate all the issues you're creating, save money, and have a more enjoyable experience.
 
Dips to 26 fps with CF is awful, probably felt more like 13 fps, high stress areas are going to cause you to flip flop between 60 and 30 fps, meanwhile with a single card you could eliminate all the issues you're creating, save money, and have a more enjoyable experience.

You are of course referring to the Tomb Raider graph. Let me quote the pertinent part for you since you obviously missed it.

The high spike at around 12 seconds was caused when I was close to Lara while she climbed an obstacle. TressFX in close up
 
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Let me point out how I addressed it thus never missed it:

high stress areas are going to cause you to flip flop between 60 and 30 fps

Only if you don't use Triple Buffering, and PCPER didn't use Triple Buffering to stop these drops to 30 FPS because on AMD cards it is only possible to enable Triple Buffering using RadeonPro. Essentially the sudden drops to 30FPS in the PCPER charts could be actually drops to 57 FPS but the next nearest FPS is 30 due to how vsync works. You do know how vsync works with FPS = refresh rate divided by integer don't you?

If you read my post you will see I had Triple Buffering enabled in TR and that the drop in FPS was due to an extreme close up of Lara's TressFX hair.
 
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Wow...

Apparently people who think xfire is not as bad as some people make out are totally delusional.

My 6990 works fine, certianly a lot smoother than my roommates stuttery GTX580. 7 Series crossfire sometime works, other times doesn't work and DFC or DVC makes it smooth in games that it isn't and you don't get the problem of it being stuck between 30-60FPS.

AMD 7 Series is shown to be smoother than Nv 6 series, but NV's own tool so lets of after Xfire.

But whatever :colbert:
 
Wow...

Apparently people who think xfire is not as bad as some people make out are totally delusional.

My 6990 works fine, certianly a lot smoother than my roommates stuttery GTX580. 7 Series crossfire sometime works, other times doesn't work and DFC or DVC makes it smooth in games that it isn't and you don't get the problem of it being stuck between 30-60FPS.

AMD 7 Series is shown to be smoother than Nv 6 series, but NV's own tool so lets of after Xfire.

But whatever :colbert:

What?
 
There are two types of TB, one that syncs and one that doesn't to the refresh rate. If you aren't synced than you're still tearing. So you're basically using vysnc and TB as a frame limiter, while increasing latency, increasing demand, and reducing performance - while not retaining the benefit of vsync to stop tearing.

Is that not correct?
 
There are two types of TB, one that syncs and one that doesn't to the refresh rate. If you aren't synced than you're still tearing. So you're basically using vysnc and TB as a frame limiter, while increasing latency, increasing demand, and reducing performance - while not retaining the benefit of vsync to stop tearing.

Is that not correct?

Whats TB?
 
Go look at the reviews in the thread about FCAT. 7900 and 7800 are shown to be more consistent than the 6 series.

7970GE vs 680 being particularly interesting as the 7970 is faster, smoother and cheaper.

Your talking CF or single?, and what this last sentence mean?

but NV's own tool so lets of after Xfire.
 
I don't have eyefinity, so I can't possibly comment. All I know is that 2x HD 7950 in Crossfire are giving me a definite performance boost with very smooth game-play. In most games I have to create a custom profile in RadeonPro to get the best out of Crossfire but it isn't rocket science. In fact I do the exact same thing using Nvidiainspector when I have Nvidia cards. I'm sure almost every single person here has used 3rd party tools to create game profiles to get the best from their GPUs.

Yes Crossfire has problems, some of which are serious. But it isn't totally useless and hasn't left most CF users with unusable broken systems since January.

+1

Haven't needed to gouge my eyes out quite yet. 🙄
 
Your talking CF or single?, and what this last sentence mean?

but NV's own tool so lets of after Xfire.

I was talking about single GPUs.

Sorry, I'm typing this at 2am. I meant to say.

7 series is smoother than the 6 series with nvidia's own tool, so lets go after crossfire (by making it seem worse than it is)

I'm talking about nvidia fans here.
 
The problem is GHz isn't any better, or worse, except in a few cases vs the 680 where it is slightly worse. Though overall in the games they've tested it has shown AMD has moved forward with their drivers, this is something I saw with fraps awhile ago, which is again why I bought a 7950.

This is of course after numerous months where AMD has been addressing the problem shown by fraps. A problem that has been occurring for more months than it's reportedly been attempted to be fixed, which is a large period of the actual product cycle.

Of course CF was never really an option for the vast majority of the forum, this was of course prior to Titan, now it's the crutch to rest hopes on. It is however, proven to be a false profit (holy crap, I need to stop playing Bioshock) in this sense as it is proven not to provide the frames it's reporting, nor is it capable of the smoothness Nvidia has without vsync (negating most if not all performance advantages).

It is only now that CF has gained momentum, presumably because of Titan. However the work AMD has done to fix the problematic drivers nobody here wanted to admit to and most still haven't, have not been brought to bare on CF.

Of course the same people who denied the single card problem, which AMD admitted to and has been addressing are now saying there is no problem with CF - or it's a problem you can cripple your high performance system to address in some band-aid fashion. :thumbsup:
 
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Wow, crossfire is NOT broke on every title. Just some recent popular ones unfortunately. AMD fixes one title, it breaks another. It's not completely broke, it just gets annoying that AMD has no consistency. Some of the Nvidia fans really need to quit thinking the 7000 series is a paperweight because the picture that gets painted is that Radeon anything is utter garbage and not even worth $1. Really getting old.
 
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Wow, crossfire is NOT broke on every title. Just some recent popular ones unfortunately. AMD fixes one title, it breaks another. It's not completely broke, it just gets annoying that AMD has no consistency.

Even a broken clock is right twice a day. 😛

I would love to have the option to go CF 7950's, especially when (if) their refresh comes out, I should be able to score one for an amazing price at that point.

However without consistancy, the chances of it not working vs working, still wouldn't be high enough as it stands now for it to make sense, even with a great deal.
 
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