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[vr-zone] Radeon HD 4870 & 4850 specs out - Page 2

post #11 of 138
If Intel isnt gonna support SLI outside of the S Train and nvidia cant make a decent board 750,780,and now 790i all have problem's.ATI isnt gonna have much competition
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post #12 of 138
Quote:
Originally Posted by Crazy9000 View Post
Why only a 256-bit Speicherinterface?

I guess I'll just enjoy actually using the memory on my cards while everyone else pretends they can.
because it costs about twice as much to make a 512mb card and 123GB/s is more bandwidth than the card can use.

wow people got so obsessed over lane width that they forgot the purpose of memory... it's to transfer data quickly. How it's transferred doesn't really matter.
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post #13 of 138
This looks really nice ... on paper. would like to see some benchies.

Need to get one for GPU folding
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post #14 of 138
Quote:
Originally Posted by xlink View Post
because it costs about twice as much to make a 512mb card and 123GB/s is more bandwidth than the card can use.

wow people got so obsessed over lane width that they forgot the purpose of memory... it's to transfer data quickly. How it's transferred doesn't really matter.
Of course lane and bandwidth ARE important. Its not much good if the ram has all this data and it cant be moved quick enough because the bandwidth, lanes and buses are too small to carry it quickly enough and transfer it all quickly to where its needed next. Thats when you get bottlenecks in a system.
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post #15 of 138
Why not really put the screws to nVidia and put out a 512-bit bus or a 256-bit bi-direction bus like on the 2900's?

***EDIT***
Quote:
Originally Posted by xlink View Post
because it costs about twice as much to make a 512mb card and 123GB/s is more bandwidth than the card can use.

wow people got so obsessed over lane width that they forgot the purpose of memory... it's to transfer data quickly. How it's transferred doesn't really matter.
Hmm...that's why.

But surely they have to know by now how to crank these things wide open to make use of a 512-bit bus.
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post #16 of 138
The bandwidth is more than sufficent in these cards. It's better than the 512-bit 2900s and the 384-bit 8800GTX/Ultra.

Memory is the last thing that is going to limit these cards, I guarantee you.

Core speed, do to the lack of TMUs, is going to be the deciding factor.

Quote:
Originally Posted by Perry View Post
Why not really put the screws to nVidia and put out a 512-bit bus or a 256-bit bi-direction bus like on the 2900's?
Massive. Waste.

This card with a 512-bit bus would probably perform about 5% faster, and cost atleast 30% more.

Increasing the ROPs by 50-100% would be an incomparably better idea.
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post #17 of 138
nice. look like im sold on the RV770 XT.
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post #18 of 138
wow, 200mhz difference from pro to xt, i wonder if they'll clock as high when oc'd
    
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post #19 of 138
Quote:
Originally Posted by Crazy9000 View Post
Why only a 256-bit Speicherinterface?

I guess I'll just enjoy actually using the memory on my cards while everyone else pretends they can.
Because it's GDDR5 memory.

Seriously, to those haters doubting it, I don't get why. R600 wasn't a complete failure and the R500 pretty much blew nvidia away.
post #20 of 138
Am I seeing separate shader and core clocks??!? Sweet! 4870 is my next card, possibly two, or a 4870X2!!
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