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 Units | 32 TMUs | 32 TMUs |
| Render Back-Ends | 16 | 16 |
| TDP | TBD | 110W |

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.
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?
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.
anyways 40mn wootz glimse of how competitive next gen cards are going to be. This just might be a small test card for 40mn process but wootz
AMD owns ATI so...
well since they are doing a die shrink it becomes cheaper to produce
Sign me up.
good thing i haven't bought any card yet as long price on this new one is near 9800GT current price.
Well if it is then NVIDIA has some serious problems on their plate. Nothing is in concrete yet though.
it would make sense since the biggest plus to ATI is price/performance which they made big with 4xxx series
If this one comes close to my HD3870 and is only powered by the PCI-E slot than I'm definitely buying it! Keep it up AMD!
The GDDR5 memory should offer more then enough bandwidth. I wouldn't worry about it.
If this card is priced in the $100 range, then NVIDIA just lost the war.