Re:Open Source GPGPU
by adwn on Monday June 02, 2014 @06:52AM
(#7832798)
> GPUs run at a pretty low clock rate anyway (600Mhz-1100Mhz), should be able to get 300-400Mhz out of an FPGA
An ASIC (GPUs are ASICs) running at 300 MHz can do a lot more per cycle than an FPGA at the same technology node running at the same frequency. A lot. Think order-of-magnitude more.
> The faulty logic elements / LUTs could just be marked as bad and not used.
This will screw up your timing, unless you reserve more setup slack (which in turn hurts the achievable performance).
An ASIC (GPUs are ASICs) running at 300 MHz can do a lot more per cycle than an FPGA at the same technology node running at the same frequency. A lot. Think order-of-magnitude more.
> The faulty logic elements / LUTs could just be marked as bad and not used.
This will screw up your timing, unless you reserve more setup slack (which in turn hurts the achievable performance).