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From 7970 to GTX680

baz2963

baz2963

baz2963

Associate
Joined
10 Jun 2011
Posts
168
Hi all,

Im not gonna be asking if its worth the change as Ive already done it, fed up with audio issues and bad performance in some game heavily leaned towrds the green side.

Bascially, Im just a bit surprised at how bad the 680 does AA, I have tried Far Cry 3 and BF3 with both cards. For example on FC3 the fps can drop down to 30 fps with the GTX when x4 AA the 7970 didnt even sniff at that !? .. Also I like to use the top of the TV tower to bench BF3 and on ultra im getting 50fps with the 680 compared with the 60 of the 7970, I have to turn off AA to get it similar.

Anyone else experiencing the same ?

Thanks
 
AA is slightly faster on the 7900 series as they have a 384 bit bus compared to a 256 bit bus on the 670/680 and AA is intensive on the memory.

Try overclocking the memory a bit. You should be able to add +350 - 500 depending on how decent your VRAM is.
 
baz2963 said:
Hi all,

Im not gonna be asking if its worth the change as Ive already done it, fed up with audio issues and bad performance in some game heavily leaned towrds the green side.

Bascially, Im just a bit surprised at how bad the 680 does AA, I have tried Far Cry 3 and BF3 with both cards. For example on FC3 the fps can drop down to 30 fps with the GTX when x4 AA the 7970 didnt even sniff at that !? .. Also I like to use the top of the TV tower to bench BF3 and on ultra im getting 50fps with the 680 compared with the 60 of the 7970, I have to turn off AA to get it similar.

Anyone else experiencing the same ?

Thanks
Click to expand...

This might be the reason, perhaps it seems Nvidia sometimes don't deal well with AA.

framerate1920x1080fps.png


Pulled that image from another post, trying to find the actual review.
 
Depends on what sort of anti aliasing you are talking here, when it gets to 8x or higher then the vram useage becomes pretty big which is why the 7970 will struggle less as it has 1gb more.With 4xmsaa both cards should perform very identical at 1920x1080/1200 however at 2560x1600 i can see the 680 having issues with 4xmsaa on as at that resolution the vram useage becomes even more extreme with anti aliasing enabled.(i think 4xmsaa at 2560x1600 is double vram useage of it at 1920x1080)

Either way 2560x1600 doesn't really need any anti aliasing enabled. :p
 
mmmm .. I'm kinda regretting my decision here. I love the GTX for (almost) plug and foreget, it doesn't give me any issues, where as the ATI is a headache having to bump up the 2d clocks every time I want to view a movie or listen music.

After the introduction of 310.70 drivers I expected the 680 to have same performance on BF and FC3 !?
 
Sycho said:
Depends on what sort of anti aliasing you are talking here, when it gets to 8x or higher then the vram useage becomes pretty big which is why the 7970 will struggle less as it has 1gb more.With 4xmsaa both cards should perform very identical at 1920x1080/1200 however at 2560x1600 i can see the 680 having issues with 4xmsaa on as at that resolution the vram useage becomes even more extreme with anti aliasing enabled.(i think 4xmsaa at 2560x1600 is double vram useage of it at 1920x1080)

Either way 2560x1600 doesn't really need any anti aliasing enabled. :p
Click to expand...

No no no.

It's nothing to with the VRAM amount more to do with the bus width and the bandwidth.


baz2963 said:
mmmm .. I'm kinda regretting my decision here. I love the GTX for (almost) plug and foreget, it doesn't give me any issues, where as the ATI is a headache having to bump up the 2d clocks every time I want to view a movie or listen music.

After the introduction of 310.70 drivers I expected the 680 to have same performance on BF and FC3 !?
Click to expand...

The 680 is around 10% slower than the 7970 without an overclock nowadays. Roughly the same difference with an overclock although this is grey because it will depend on what I clock you can achieve.

Difficult to tell with FC3 as it's a new game but as it's also pushing a lot of AA I doubt it'll match a 7970 especially as it's a "Gaming Evolved" title.
 
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Why do you have to pump up the 2D clocks to watch movies or listen to music?

As for the new Drivers, i don't know, there is a lot of Nvidia's own slides knocking about, but an actual review test of them seems to be missing.
 
Well, Im rocking one of these.

Asus GeForce GTX 680 DirectCU II TOP

So you'd think even the stock clocks woudl give decent results.
 
Go back to the 7970, get yourself a secondhand Xonar HDAV 1.3?

Would have cost less than going 7970 > GTX680.

EDIT : And the bay is full of slims all more expensive than the total value I paid for the 1.3 deluxe, brilliant.

EDIT 2 : You could have just set a 2D profile with adequate clocks.
 
Last edited:
Martini1991 said:
Go back to the 7970, get yourself a secondhand Xonar HDAV 1.3?

Would have cost less than going 7970 > GTX680.

EDIT : And the bay is full of slims all more expensive than the total value I paid for the 1.3 deluxe, brilliant.

EDIT 2 : You could have just set a 2D profile with adequate clocks.
Click to expand...

I hear ya, but I'm trying to keep cabling to a minimum, I'd need two hdmi cables for a sound card I guess.
 
baz2963 said:
Hi all,

Im not gonna be asking if its worth the change as Ive already done it, fed up with audio issues and bad performance in some game heavily leaned towrds the green side.

Bascially, Im just a bit surprised at how bad the 680 does AA, I have tried Far Cry 3 and BF3 with both cards. For example on FC3 the fps can drop down to 30 fps with the GTX when x4 AA the 7970 didnt even sniff at that !? .. Also I like to use the top of the TV tower to bench BF3 and on ultra im getting 50fps with the 680 compared with the 60 of the 7970, I have to turn off AA to get it similar.

Anyone else experiencing the same ?

Thanks
Click to expand...

Ever felt like you have jumped out the frying pan into the fire?
 
NVidia has never really been any good at 8xMSAA, performance has always dropped off a cliff at that level.

Another thing that might be hurting performance is tessellation, NVidia cards process it in full whereas by default AMD drivers cheat by degrading it to a lower level, so running a lower level of tessellation on an NVidia card is probably the equivalent of what AMD is actually doing at the highest level unless you turn off the 'optimizations'.
 
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mmj_uk said:
NVidia has never really been any good at 8xMSAA, performance has always dropped off a cliff at that level.

Another thing that might be hurting performance is tessellation, NVidia cards process it in full whereas by default AMD drivers cheat by degrading it to a lower level, so running a lower level of tessellation on an NVidia card is probably the equivalent of what AMD is actually doing at the highest level unless you turn off the 'optimizations'.
Click to expand...

Well that's very interesting about Tessellation. First time i have heard that.

Where did that info come from? can i have a link i would like to read it.
 
humbug said:
Well that's very interesting about Tessellation. First time i have heard that.

Where did that info come from? can i have a link i would like to read it.
Click to expand...

AMD optimized tessellation, as opposed application settings. It's in CCC.
Although I've always had stuff like that turned off.
 
Well, I've decided to send back the gtx680 and since I've don't have a 7970 anymore ill have to buy another.

Gonna go for sapphire vapor-x 3gb, hopefully it's a winner. I had the asus matrix which is a quick card but I'm saving around 60 going for the sapphire.
 
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