RV770 expected to release in May?

[muon]

Shader power:

3870: (320x775) = 248000
4870: (480x1000) = 480000

You have to double these figures because its 2 flops per cycle per shader.

 

[HighlandeR]

Always gonna be 20-30% better But if theres a 4870X2 then thats thrown out the window just hope the rumours are true cos if they release a 4870XT its barely gonna catch up to a 3870X2 surely?

And thats when were gonna be saying wheres 4870X2.....just pray the rumours are true.

 

[Lightnix]

You have to double these figures because its 2 flops per cycle per shader.

As I said, they were merely a number comparison under the assumption that the details are comparable, I'm not saying that's how many FLOPs the cards can do, but rather a comparison between a number derived from what we apparently already know.

 

[Monkeynut]

ATi have their dual-card tech working quite well so a 4870X2 would be a brilliant performer.

 

[psychas]

imagining the power of TWO 4870x2

 

[kylew]

well 3870x2 has 640 steam processors. maybe if then change something in core to work more efficient and better maybe then 50%. no doubt some valve games will benefit maybe 50% but not all games as i say if it will be 20~35% i'll take it

The 3870X2 DOES have 640 stream processors, but it's not 1 GPU. One GPU with 640 would be significantly faster than a 3870X2. The RV770 is one GPU, with supposedly 480 stream processors, that in itself will be a 50% speed increase. Plus the extra TMUs. If this is all true, then it would be an all around 50% increase, not just on games that would take advantage, as it's not reliant on crossfire technology. I'm a big fan of the 3870X2, but I know a single GPU card will be technically better until they find out how to do real transparent crossfire, like dies communicating with each other directly without crossfire tech being needed.

 

[Lightnix]

Yeah, R600 style cards are very limited by the amount of TMUs, I think some people just saw the amount of shaders and dismissed it as a mediocre upgrade then and there.

 

[Monkeynut]

I assume that a 4870 and 3870 are xfire compatible?

 

[kylew]

I assume that a 4870 and 3870 are xfire compatible?

Never assume!

Since they share similar architecture, possibly so, but then a 3800 series card might end up bottle necking the 4800 series card. Despite that, since ATi have gotten mismatched crossfire working, it could be a possibility, where the 3800 basically contributes what it can.

 

[Monkeynut]

Yeah, the 4800 doing the main rendering and the 3800 doing the Antialiasing would be good.

 

[Cupra]

all that speed and no aa as ati suck at sorting softeware out and there hardware for games
however they will bench at 1280x1024 with no aa for 3dmark 06 perfect

 

[Gerard]

Actually the aa performance has been fixed (according to hardocp) for the r700 series.

 

[kylew]

Actually the aa performance has been fixed (according to hardocp) for the r700 series.

And even then, it wasn't that bad once the drivers came along, I've seen a few times, the 8800GT have more of a hit than a 3870 (techpowerup reviews)

 

[RavenXXX2]

ATI+AA=SUCK..

 

[kylew]

ATI+AA=SUCK..

RavenXXX2 + an internet connection + a keyboard = suck

 

[gurusan]

The AA issue is old news blown out of proportion, and from my experience doesn't even seem to be true.

although overall performance is quite a bit lower, my single 3850 has less of a hit when AA is used than my 8800gts 512mb did. Not to mention smoke in CoD4, sometimes it would go down to single digits with the 8800, with my single 3850 is never goes below 30ish even when people there are tons of smoke grenades...

 

[Trunks9486]

AF is the main problem i think, AA is not as bad as people make it.

Anyway both of these will be faster, AF because of the doubling of the TMUs and AA because they have reduced the Z sampling rate or something to match G80s/G92.

 

[gurusan]

I always run all my games forced to 16x AF regardless of AA settings...on both my 8800s and 38xx series.....not experienced any performance problems because of it

 

[kylew]

I always run all my games forced to 16x AF regardless of AA settings...on both my 8800s and 38xx series.....not experienced any performance problems because of it

+1. I don't know why people are so determined to carry on about the AA issue as if it's still a massive problem. The GX2's drivers were pretty bad initially with early benches showing it to be slow and extremely bad with AA enabled. It's like constantly going on about how crap NV is because the 5 series were pretty bad. If anyone even tried to say that, people would be all over them like a bad rash shouting fanboy and so on. People like raven, i think, are purposely ignorant so they can justify the over the top defence or kiss-assing of their beloved NV, when NV doesn't reciprocate.