ATI Radeon HD 4000 Series discussion

[LordEC911]

Any chance of a 4780 or 4870x2 AIW? Should I hold my breath? I miss them.

AIW was killed awhile ago...
It shouldn't be missed.

But that shared memory is probably not true....
Although I do hope it is, but I'm pretty sure it's not .

Shared memory is most likely clamshell mode for GDDR5.

That shouldn't be needed if clamshell mode is used in GDDR5 application in HD 4870 board. Problem is, it hasn't been implemented in the reference board at the moment IMHO, perhaps the AIB will implement it later in their own version of HD 4870 card -in house designed PCB ala HD 3870 Toxxxic from Sapphire, so the existence of 1 GB HD 4870 won't solely be determined by the availability of 1 Gb GDDR5 chip.

I take it you understand the whitepaper?

Why would it need to be "implemented" on the board?