The ATI Radeon 5XXX Thread

[jaredpace]

charlie had the codenames wrong? just hemlock afaik and thats probably cause he listened to sylvie

jared, why would the 5870 be that much faster than the 5850? those numbers look weird, i cant figure out what he based his perf boost over 4890 on..
what shader count did he expect when he made that graph? it doesnt make any sense that with about double the hw he only predicts a 10% boost in some games?

and about 5870 beating gtx295...
4870 to 4870x2 scaling is 55% of a 295 to 90% of a 295... considering that a 5870 appears to have the same hw specs as a 4870x2 but isnt castrated by having it on 2 chips and there is no overhead, id expect a 5870 to be around 110% of a 295 like a 4870x2 would be, if it wouldnt have any overhead caused by being based on 2 chips... and thats assuming the 5870 comes clocked at 750mhz core and 3600mhz mem... according to the rumored specs it looks like like 800-900 clocks for the gpu and 5000mhz for the mem... so it will DEFINATELY beat the 295...

well it may beat the 295. like everyone else i dont know - just guessing. I did read on CH that the internal workings of the dual core provide 200% efficient scaling, so it's like a 4870x2 with perfect scaling. if that were the case it would be 110% of the 295 like you said. but i don't think they're actually going to get 200% of a 48701gb based on the rumor that cypress = 16000-18000 vantage and a 48701gb is like ~10,000.

dual gpu cards are more bandiwdth limited than single gpu cards... thats why there has been all this talk about getting gpus to share their memory capacity and bandwidth. cause right now, there is double the mem and double the mem bw on a dual gpu card, but it doesnt result in higher overall bw and higher overall memory capcity

I wonder if they have this fixed for the 5870x2? I think there will be an operational sideport to provide more bandwidth directly between the gpus, but I wonder if they will be sharing the memory?