4850 pre-orders for $195.99 in FXvideocards

FrozenGpu

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Dec 8, 2007
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I am pretty sure that it will have 40 tmu's [texture mapping units], but how many ROP's [render output unit's]?

I would say maybe 20-32, but that is just an educated guess.
 

hannibal

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It's 32 tmus (I think that that is allso confirmed by ATI). 3000 series shader units were 4-1 and these most propably are 5-1, so more shader operations per shader as some one explained it, or something like that. Don't remember it anymore. Try to searsh from these forums...
32 TMU's 16 rops... But hey nobody knows...
 

MrCommunistGen

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A BUs is bby no means a bottleneck, memory bandwith is a bus x clocks.
if you "x" the Bus you drive to school with your home clock, youll get your overall memory bandwith.
Uhh... fo shizzle?

I'm looking forward to confirmed specs and benches on this card since something in this range will probably be what I wind up getting. As for RAM type, I think this might be a lower end 4850 and that some of the higher end ones will have more advanced (faster) memory.

-mcg
 

Gravemind123

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The HD 4870 was going to use GDDR5, the HD 4850 is going to use GDDR3(although a manufacturer could in theory put GDDR4 or 5 on their card). The bus is only a bottleneck if they can't get the memory speeds up high enough to make up for the small bus. And given the predicted speeds of GDDR5, the HD 4870 won't have that issue, but it may be a problem for the HD 4850, although the 8800GTS(G92) only has a 256-bit bus and it does well at all but the highest resolutions. I suppose if you need a really high resolution gaming card the 4870 would be the better choice, but we will see with benchmarks soon.