AMD 40nm RV740 with GDDR5 Coming

AMD could have a monster midrange card on the horizon. According to sources, RV740 may be a 40nm process shrink of RV770LE - the currently available HD 4830.

Sources received information claiming that RV740 will have 640 stream processors, 32 texture units and 16 render back-ends, just like the HD4830.

On the memory side, things have changed. The memory is expected to be 900MHz GDDR5 (3600MHz effective) for the highest-end card using the RV740 GPU, utilizing a 128-bit memory interface instead of a 256-bit interface running at 900MHz GDDR3 (1800Mhz effective).

Power consumption will be significantly lower than that of RV770LE due to the 40nm process. At the same time, performance should be slightly higher than the HD4830, but not quite up to the level of the HD4850.

Sources indicate that the price of the card will be under $100 (USD).

GPU
RV740
RV770LE
Model Name
TBD
Radeon HD 4830
Process
40nm
55nm
Stream Processors
640
640
Core Clock
TBD
575MHz
Memory Clock (Effective)
900MHz (3600MHz)
900MHz (1800MHz)
Frame Buffer
512MB GDDR5
512MB GDDR3
Memory Interface
128-bit
256-bit
Memory Bandwidth
57.6 GB/sec.
57.6 GB/sec.
Texture Units32 TMUs32 TMUs
Render Back-Ends1616
TDPTBD110W
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  • Nintendork
    gwolfman

    You don't know what you're talking about.

    900 --> 1800Mhz GDDR3 * 256bit / 8 = 57.6GB/s
    900 --> 3600Mhz GDDR5 * 128bit / 8 = 57,6GB/s

    bits are bit everything in this world.

    Using 128bit they cut a hell of space than using 256. Also GDDR5 utilize less voltaje so that reduce consumption a give the same bw as having GDDR3.

    Kudos for AMD/Ati, I'm going for this baby. Please, call it HD5670.
  • Other Comments
  • gwolfman
    What sucks is the 128-bit memory interface. They should have kept it 256-bit and I'd buy it.
  • JonnyDough
    I was thinking of buying a 4670...I guess I'll wait.
  • JonnyDough
    gwolfmanWhat sucks is the 128-bit memory interface. They should have kept it 256-bit and I'd buy it.


    What if it makes little difference? Doesn't the process shrink mean that the GPU aligns with more bus lanes? I was thinking it does...

    I know GDRR5 is faster than GDDR3, but does it lower the card's required power too?