Questions on Nvidia / AMD proprietary graphical technologies and SLI/XF

SuperADJ

Honorable
Jun 20, 2012
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10,530
Hi guys,

I've been spending a huge amount of time lately compiling a spreadsheet containing information on graphics cards that I'm considering for my first PC build. Up until recently it only contained Nvidia products, as I was a little scared by reports of AMD drivers spoiling the performance as well as the fact Crossfire was vastly inferior to SLI. Seemed like the on-paper figures didn't represent the in-game experience at times.

However, it seems with the release of the frame pacing update and the new R9 series of cards I'd be doing myself a disservice if I didn't at least consider AMD products. On paper, they look very strong, especially from a price/performance perspective. But I don't really understand them all that well, so was wondering if you guys could help me out.

It seems both companies utilise technologies that are exclusive to them. For example, Nvidia use PhysX, whereas AMD do not. Could anyone point me in the direction of a comparison between each company's exclusive technologies? I am specifically interested in anything that will make a significant difference to the look of a game, for example someone told me AMD cannot use Ambient Occlusion, which if true is quite a difference.

In case it helps, I am considering either a single, high-end GPU now (GTX 780) with plans to SLI/XF it 6 months or so down the line, or perhaps a pair of mid-range GPUs (760s) from the start. I'll almost certainly be playing on 1080p and nothing more, BUT would want to be able to play anything at a decent framerate and with settings as close to maximised as possible. I'd like to keep the budget for the card/s under £600.

Finally, the games I'll most likely be playing will be things like Crysis 3 and Battlefield 4, Batman and Final Fantasy XIV:ARR in case that makes a difference...

Thanks for any help!
 
Solution
I used to have an Nvidia card before making the jump to AMD, and I can say this: driver releases for AMD cards are not as abundant as it was when I had my Nvidia card. However, I am currently pleased with the performance of my card, but I am aware that the variance on the perception on AMD's performance is high. But until benchmarks of AMD's R9 290/290X, I cannot speak of how well they would do.

Anyway, yes, both Nvidia and AMD employ proprietary tech. I'll try to list most of them and dispel some erroneous thoughts. First up, AMD cards can render ambient occlusion, but they do not employ the same tech to do so. Hence AMD card employ Screen Space AO while Nvidia cards employ Horizon-Based AO. This is similar to how the tow companies...

faster23rd

Distinguished
Oct 11, 2011
640
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19,160
I used to have an Nvidia card before making the jump to AMD, and I can say this: driver releases for AMD cards are not as abundant as it was when I had my Nvidia card. However, I am currently pleased with the performance of my card, but I am aware that the variance on the perception on AMD's performance is high. But until benchmarks of AMD's R9 290/290X, I cannot speak of how well they would do.

Anyway, yes, both Nvidia and AMD employ proprietary tech. I'll try to list most of them and dispel some erroneous thoughts. First up, AMD cards can render ambient occlusion, but they do not employ the same tech to do so. Hence AMD card employ Screen Space AO while Nvidia cards employ Horizon-Based AO. This is similar to how the tow companies approach AA, Nvidia has Temporal AA (TXAA) while AMD has Morphological AA (MLAA). Just as Nvidia uses PhysX to simulate object collisions, AMD employs a similar tech in the form of TressFX, although the latter's usage is exclusively on hair textures.

That's all I could recall in a snap.

Moving on. Yeah, a 780 and 760s are great high-end choices, and both are available right now. AMD's latest cards are steadily trickling into retailers, but their cream of the crop, the Hawaii GPU-equipped R9-290 and 290X are still only on announced. With the announcement of Nvidia's new 780 ti card, the market is expecting to see price drops at sub-$650 prices. However, as you might already know, AMD suffers from framerate issues, especially in multi-card configurations, so that's something to keep in mind.

And to respond to your note, Crysis 3 and Batman is optimised for Nvidia cards while BF4 is optimised for AMD. So there.
 
Solution

SuperADJ

Honorable
Jun 20, 2012
41
0
10,530
Sorry for the late reply. Thanks so much, that's cleared a lot up. In the time it took me to reply we've seen the arrival of the R9s, as well as the Nvidia price-cut and 780 Ti announcement!

It's an even harder decision now, but I think I'll wait to see how the custom-cooled 290Xs fare in testing. The reference one looked superb but ran too hot and too noisy IMHO, especially when a custom-cooled 780 is now actually cheaper! Then there is Mantle to consider, so again I'll wait to see what kind of boost that provides to the 290X come mid-December. Oh, and then there's the 290! Whichever way I go I'm so glad AMD unveiled these awesome cards and ended Nvidia's monopoly in the high-end segment of the market.

Thanks again for the help. Now I need to decide on whether a 120/144hz monitor would be worth buying over a 60hz one...
 

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