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[TP] AMD Outs Radeon HD 6670, HD 6570, and HD 6450 for OEMs - Page 3

post #21 of 23
I'll try my best to find a 6670 when my Llano mITX board arrives. I start to need urgently a HTPC, since tey're starting to output 720p free TV content in Spain and I don't feel like getting a receiver.
I'll get an MSi dual receiver+recorder, plug it into the board, and record TV in HD while I watch it. Might aswell connect the HTPC to the wired Gbit LAN in home, that way I won't need to have massive drives on it, I can stream the recording directly to the mass storage units on my home server.

Hope someone sells them on the bay
   
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post #22 of 23
Quote:
Originally Posted by sLowEnd View Post
They are not rebranded.

The 6450 is based off Caicos, not Cedar. (160sp vs 80sp)

6670 & 6570 are based off Turks, not Redwood. (480sp vs 400sp)
I apologise, I thought they were rebranded 5000's.
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post #23 of 23
Quote:
Originally Posted by gerikoh View Post
And the that 6450 would be a win if they can hybrid crossfire with a 6310.

While if they can make the 6570 and 6670 hybrid crossfire with Llano.
Would be a waste. Multi gpu's do two strategies. One gpu renders half the screen while other one renders other half. One gpu renders one entire frame while 2nd gpu renders the next frame. If they aren't balanced really well tying them together is a waste of time.

Most hybrid crossfires involve the card slot gpu rendering 2 frames while the onboard gpu renders the 3rd frame. But the bus locks from memory locations being tied up usually throws all the goodness in the dumpster. Kind of like amd's 6 core cpu. It doesn't bench well or perform well on apps that are fully threaded for every core because it spends so much time maintaining cache coherency and waiting for lock lifts that it just falls off a performance cliff.
Now bulldozer has 11 full passthrough circuits. Which means it can get to memory anytime it wants to. It's going to be a threading nightmare of chewing threads alive without pausing or stopping.
And if you remember the slow bloody rollout of the GT480 from nvidia where their yeilds where horrible becasue thier passthrough circuitry didn't have enough redundency they had to redesign and spend all the space on extra spare passthroughs and cut serial packs down from 512 to 480.

Crossfiring and any attempts to chain unequal gpu's together is a huge investment of energy for very little in benefit.
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