R420 IQ Comparison

[Doomtrooper]

If you have a ATI card then you have seen it in motion and guess what...for the last year ATI has won the IQ contest using it. Give your head a shake.

 

[SiliconAbyss]

I agree, the second link is every so slightly sharper in the ATi card but it is VERY SLIGHT. It is within 0.1% margin of difference IMO.

 

[jimmyjames123]

If you have a ATI card then you have seen it in motion and guess what...for the last year ATI has won the IQ contest using it. Give your head a shake.

Compared to relatively low quality AA and hacked brilinear filtering on the FX cards, why am I not surprised?

 

[Chris123234]

i see the differences in that section as well. and there the r420 deffinately looks sharper.

I agree but staring at these pics for minutes at a time is giving me a headache and making me go blind.

After changing to 800x600 again i see what might appear to be a slightly sharper image on the ATi. But Im not even sure if im seeing this because its there or because you are saying it is.

 

[retsam]

ATi is NOT using the same algorithm that NVIDIA used in the NV3x. There are significant differences.

thats not the question at hand, what im asking for is why does he feal compelled to go this far out of his way to for the aligations thrown at ati but he didnt seem to go this far for nvidia

 

[pino]

so nv3x brilinear is good too ?
did we really need ATI tell us 'Brilinear is GOOD, yay!' to accept it after 1 years of nvidia bashing for using it ?

or ATI brilinear is better than nv3x brilinear in some way ?

ATi is NOT using the same algorithm that NVIDIA used in the NV3x. There are significant differences.

ok different algoritm, got it. Thanks .
Now what are the significant differences ?

 

[Doomtrooper]

Then what is the debate about, image quality is excellent, AA is great..go play games people.

 

[Chris123234]

ATi is NOT using the same algorithm that NVIDIA used in the NV3x. There are significant differences.

thats not the question at hand, what im asking for is why does he feal compelled to go this far out of his way to for the aligations thrown at ati but he didnt seem to go this far for nvidia

BEcause he didnt have too. Everyones grandma could see it.

 

[trinibwoy]

image quality is excellent, AA is great..go play games people.

ATI Slogan?

 

[Malfunction]

I linked this pic because I left it in it's original form:

Other Pic

I mean, if this is gonna be how difficult it is to spot... then great job ATi. Though if I notice it gaming, I still want the ability to turn on/off full Trilinear. I am paying so much for a freaking card, please allow me that right... at least.

 

[joe emo]

If you have a ATI card then you have seen it in motion and guess what...for the last year ATI has won the IQ contest using it. Give your head a shake.

There's one thing I'd like to know if it's possible: ATi have said this is an "adaptive" or "intelligent" algorithm, capable of scaling itself giving certain conditions; would it be possible for them to exceed the filtering levels that see on the coloured mip tests? I play Day Of Defeat almost exclusively, I don't need performance tweaks there, but I don't care if they don't mess my output -- however, if they could possibly increase the quality further (at the expense of performance) in games like this, I'd be all for it!

 

[euan]

Ya, you can really see it in the well lit area's of the map.

See what? Are you so pointedly biased that you've gone blind? Maybe all that ranting and raving you've done all over the net has taken it toll on you visual abilities.....

WTF you gotta scream bias if you F****n blind by your own?

Gotta the other one coming, just a sec.

If I turn my desktop gamma up near max, I'm sure I can find at least 4 or 5 pixels in that region that are different. Also one of the shadows is lighter. How does polygon alignment, and shadows effect trilinear filtering?

 

[AlphaWolf]

thats not the question at hand, what im asking for is why does he feal compelled to go this far out of his way to for the aligations thrown at ati but he didnt seem to go this far for nvidia

Because it didn't take nearly this much work to spot nvidia's implementation of brilinear. Read his 5900Ultra review if you think he didn't look into the matter.

 

[Chris123234]

I linked this pic because I left it in it's original form:

Other Pic

I mean, if this is gonna be how difficult it is to spot... then great job ATi. Though if I notice it gaming, I still want the ability to turn on/off full Trilinear. I am paying so much for a freaking card, please allow me that right... at least.

Ok the grass is different. is this was your referring to?

 

[Dave Baumann]

umm dave i have a quick question .... when nvidia did this, why didnt you go this far out of your way to disprove any misinformation or am i missing something

Forgive me - but why is providing screenshots called "going out of your way to disprove anything". People have been calling for comparisons and I've provided comparisons and have, as yet, not offered any commentry on them. Currently I'm providing some references, similar references to the ones I used previously when the NVIDIA method as first noticed (yes, these images / maps are used becuase they are more or less the same locations as the shots used in the 5900 preview).

 

[joe emo]

ok different algoritm, got it. Thanks .
Now what are the significant differences ?

well, I'm not to versed on the issue, but I'd say: NVIDIA's brilinear was a fixed algorithm that was could not scale/adapt like ATi's algorithm. I'd further wager, that there are conditions when ATi's algorithms adapts to be the SAME as NVIDIA's, as NVIDIA's may be perfect given very specific conditions.


Just speculation really -- we do know that ATi's algorithm is different than NVIDIA's, however.

 

[pocketmoon66]

Dave,

I hate to be a PITA but while those shots like fantastically similar, could you do one with a bit more range ? Both of those have limited scene depth.

It would make me happy

 

[euan]

I linked this pic because I left it in it's original form:

Other Pic

I mean, if this is gonna be how difficult it is to spot... then great job ATi. Though if I notice it gaming, I still want the ability to turn on/off full Trilinear. I am paying so much for a freaking card, please allow me that right... at least.

I think your seeing things. If you cover up the areas of the screen away from the top square then do the mouseover there is no difference. If you leave the sky in view, the area appears to change brightness, with no change in texture quality what so ever. Unless, I have crap eyes, I think your seeing an optical illusion, or "other".

 

[digitalwanderer]

I really can't see a difference no matter how hard I try, is there any really obvious examples of the difference? :|

 

[Dave Baumann]

I hate to be a PITA but while those shots like fantastically similar, could you do one with a bit more range ? Both of those have limited scene depth.

Yeah, I know. Like I said, these images are close to ones that I've used before, and chosen because you can see the mip transistions in the detail textures in the bottom quarter of the screen. Its difficult to get other points in UT because you have to alter maps so there is only one respawn point, and I'm getting help with that (thanks JB!!). I've now got some CoD saves, but realised that I've lost Disc 1 so I may not be able to use the single player exe for now.