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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.
最近，早期有关NVIDIA的下一代GT300图形处理器浮出水面，这表明它包512着色处理器，并加强处理模型。以新的报告从硬件-Infos带来了曙光的记忆体介面，显示它是强于任何生产的GPU 。据一块的信息，一直在做乒乓之间硬件Infos和光明的一面的新闻，GT300可能采用512 - bit宽GDDR5记忆体介面。
内存接口结合使用的最低延时GDDR5记忆体，提供了理论千兆赫（ 2000兆赫的DDR ）将流失了256 Gb /s的带宽，最高支持GPU迄今。虽然硬件Infos提出的最低延时的数字为0.5纳秒，数学行不通了。在0.5纳秒，内存的实际时钟频率为1000兆赫将流失了512 Gb / s的，所以有轻微错误的。奇梦达IDGV1G - 05A1F1C - 40X导致今天生产的“ 40X”的评级。随着这些芯片的512位接口， 256 Gb /s的带宽方程满意。在时钟速度的内存只是不知道，但是，以上只是一个例子，使用普通的高性能GDDR5内存芯片。新GPU，至少从这些资料很少漏水，将是另一种硅怪物了NVIDIA的决策。 |
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发表于 2009-5-7 11:37
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