ATI Mobility Radeon HD 4860 and 4830 appear on 40nm
Tuesday 03rd March 2009, 10:00:00 AM, written by Rys
Spotted over at The Tech Report, the Graphics Products Group at AMD have taken wraps off the ATI Mobility Radeon HD 4860 and HD 4830, and thus RV740.
HD 4860 is a step up from the existing HD 4850, by virtue of support for GDDR5 and thus relative gobs of memory bandwidth (despite having 128-bit to DRAM, rather than the 256-bit of Mobility HD 4850). 8 RV770-class SIMDs make for 640 SPs, and the unified GPU frequency has a peak of 650 MHz, depending on the thermal solution of the laptop it'll find itself in.
4830 is likely a GDDR3-only configuration, with the memory bandwidth and clock rates placing it in the performance pile below Mobility Radeon HD 4850.
Notably, TSMC manufacture the new silicon at 40nm, making it the first 40nm mobile GPU in mass production.
Update:
AMD got in touch to let us know that because no notebooks are shipping with HD 4860 yet, they've created some video content that shows it off, using MXM modules inside regular chassis'. AMD's Rick Bergman has also written a blog entry talking about the new chip, and there's also some shiny new image media as well.
HD 4860 is a step up from the existing HD 4850, by virtue of support for GDDR5 and thus relative gobs of memory bandwidth (despite having 128-bit to DRAM, rather than the 256-bit of Mobility HD 4850). 8 RV770-class SIMDs make for 640 SPs, and the unified GPU frequency has a peak of 650 MHz, depending on the thermal solution of the laptop it'll find itself in.
4830 is likely a GDDR3-only configuration, with the memory bandwidth and clock rates placing it in the performance pile below Mobility Radeon HD 4850.
Notably, TSMC manufacture the new silicon at 40nm, making it the first 40nm mobile GPU in mass production.
Update:
AMD got in touch to let us know that because no notebooks are shipping with HD 4860 yet, they've created some video content that shows it off, using MXM modules inside regular chassis'. AMD's Rick Bergman has also written a blog entry talking about the new chip, and there's also some shiny new image media as well.
Tagging
ati ± mobility, rv740, radeon, gddr5, 640
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