Newsgroup: it.comp.hardware.video-3d
Titolo: Xfire X1900XTX è più veloce dello SLI di 7800-512

SLI IS Nvidia's pride and joy. It used to belong to 3DFX and now it is 
Nvidia's treasure. Therefore Monday will be the day for Nvidia, as R580, 
Radeon X1900 XT Crossfire edition with another X1900 XTX card will 
outperform Nvidia's GTX 512 SLI in almost every single case. It runs faster 
in games and synthetic 3Dmark benchmarks.
It is simply faster in most ways, even when you use a lot of FSAA and Aniso. 
After weeks of absence, Nvidia just managed to ship some of Geforce 7800 GTX 
512 cards in retail but ATI's R580 will end up cheaper and it is able to 
beat up 7800 GTX 512 SLI on performance.
Nevertheless, Nvidia has one more SLI to release. It has G71, possibly 
called Geforce 7900 SLI that is meant to compete R580 based X1900 XTX 
Crossfire system. For Nvidia's sake we hope it can be faster than Crossfire 
R580 system. ATI R580 Radeon X1900 XTX, XT and Crossfire cards will be 
available at launch date, at upcoming Monday.
http://theinquirer.net/?article=29057
aspettiamo i numeri e che arrivi g71 per vedere se e come competerą
nel frattempo trapelano i primi dati su R580
R580 Radeon X1900 has 384 million transistors
WE MANAGED to get some of the remaining unannounced information about ATI 
R580 cards. We reported that you can and will see three different cards. The 
top one, the Radeon X1900 XTX is clocked at 650MHz core and 1550 MHz memory. 
This one works in Crossfire but you need Radeon X1900 XT Crossfire edition 
card clocked at 625 MHz core and 1450 MHz memory to make a pair. Radeon 
X1900 XT will also be clocked at 625 MHz core and 1450 MHz memory.
The R580 has 48 pixel processors, or should we say pixel shaders, while it 
still has only sixteen pipelines. We don't care as long as it gives a high 
score. The card has eight vertex shaders but you don't need many of those 
anyway. It is now the fight of shader information versus pure pixels, as 
Nvidia can process more pixels per clock while ATI can process more pixel 
information per clock. There is no right or wrong in this case as it will 
depend on the game you are playing.
ATI's R580 uses its ring bus memory controller that has a sort of 512 bit 
internal memory controller. It uses 256 bit 8 channel GDDR 3 and it can 
support GDDR 4 as well. It is, of course, a native PCIe card and it supports 
dynamic voltage and clock speed control. So overclocking should not be that 
hard.
Nvidia is fighting R580 with its G71, but there is still not much 
information about the chip available. The company has been very quiet but 
some partners believe that you should see some of those cards out before 
late February. Nvidia, the doyenne of fabless chip company watchers, can 
always surprise.
Nvidia needs to clock G71 at 700 MHz+ to match the R580 performance but the 
question is how many of Nvidia's chips will work at such high speed. 
Remember, it is all about yields. You can always pick a dozen that will run 
even higher but you need to have yields to fulfil your demands, make some 
financial sense and grant your heart's desire.
http://theinquirer.net/?article=29055

 MHz core and 1450 MHz memory.
mi pare che stiano facendo la stessa cazzata della X1800XT
tanto vale che facciano la X1900XTX a 700 MHz e non 650 e la X1900XT a 625