Tuesday, May 5th 2009
GT300 to Boast Around 256 GB/s Memory Bandwidth
Recently, early-information on NVIDIA's next-generation GT300 graphics processor surfaced, that suggested it to pack 512 shader processors, and an enhanced processing model. A fresh report from Hardware-Infos sheds some light on its memory interface, revealing it to be stronger than that of any production GPU. According to a piece of information that has been doing ping-pong between Hardware-Infos and Bright Side of News, GT300 might feature a 512-bit wide GDDR5 memory interface.
The memory interface in conjunction with the use of the lowest latency GDDR5 memory available, at a theoretical 1000 MHz (2000 MHz DDR) would churn out 256 GB/s of bandwidth, the highest for a GPU so far. Although Hardware-Infos puts the lowest-latency figure at 0.5 ns, the math wouldn't work out. At 0.5 ns, memory with actual clock rate of 1000 MHz would churn out 512 GB/s, so a slight inaccuracy there. Qimonda's IDGV1G-05A1F1C-40X leads production today with its "40X" rating. With these chips across a 512-bit interface, the 256 GB/s bandwidth equation is satisfied. The clock speeds of the memory isn't known just as yet, the above is just an example that uses the commonly available high-performance GDDR5 memory chip. The new GPU, at least from these little information leaks, is shaping up to be another silicon-monstrosity by NVIDIA in the making.
Source:
Hardware-Infos
The memory interface in conjunction with the use of the lowest latency GDDR5 memory available, at a theoretical 1000 MHz (2000 MHz DDR) would churn out 256 GB/s of bandwidth, the highest for a GPU so far. Although Hardware-Infos puts the lowest-latency figure at 0.5 ns, the math wouldn't work out. At 0.5 ns, memory with actual clock rate of 1000 MHz would churn out 512 GB/s, so a slight inaccuracy there. Qimonda's IDGV1G-05A1F1C-40X leads production today with its "40X" rating. With these chips across a 512-bit interface, the 256 GB/s bandwidth equation is satisfied. The clock speeds of the memory isn't known just as yet, the above is just an example that uses the commonly available high-performance GDDR5 memory chip. The new GPU, at least from these little information leaks, is shaping up to be another silicon-monstrosity by NVIDIA in the making.
106 Comments on GT300 to Boast Around 256 GB/s Memory Bandwidth
well if you remember R600 days when they put a 512bit ringbus controller and it flopped :(
GT300 will cost a arm, leg and a head for us mortals, i bet NVIDIA will go the same rute as their current GT200, and ATI will realy beat them with their sleek, fast and CHEAP cards
And then the cycle will be complete. Muhuhahaha
GTX280 was 65nm
Indeed when a new process comes out yields will be bigger and when a new fabrication process comes out it usually has low yields until it is perfected. LOL
Now I dont think we will see the GT300 any time soon, but even if it is mid 2010 it will be a sweet part no dought.
The GT300 GPU could be very promising, and I hope it does succeed, and I also hope ATI brings up some seriously good competition this next round too, gotta have it! :D