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AMD may be looking towards RISC-V in future CPUs
www.electropages.com, Mar. 30, 2022 –
A recent job posting by AMD suggests that RISC-V cores may appear in future designs, and their use could provide AMD with some significant advantages. What differentiates RISC-V from typical mainstream desktop processors, why would AMD consider integrating RISC-V into their future designs, and could RISC-V become a major contender in the desktop computing industry?
What differentiates RISC-V from typical mainstream desktop processors?
It has only been the past few years that RISC-V has received real media attention, with some calling it the architecture of the future. In contrast, others claim that it will replace ARM devices, while some even claim that RISC-V will replace mainstream processors such as Intel and AMD. But what exactly is RISC-V, and how does it differentiate itself from classical CPUs found in desktop PCs?
As the name suggests, RISC-V is a CPU architecture that uses a RISC model (Reduced Instruction Set Computing). As such, RISC-V focuses on CPU designs that are far simpler than those manufactured by Intel and AMD that use a CISC model (Complex Instruction Set Computing). This means that performing complex tasks on a RISC-V CPU may require more instructions (and therefore processing time) compared to running the same task on an Intel or AMD CPU.
However, simpler hardware allows CPU cores to use significantly less energy while simultaneously allowing for higher core density. Furthermore, the energy saved by RISC cores compared to CISC cores is not proportional, meaning that the energy consumed by CISC processors is generally an order of magnitude greater (if not more). This energy advantage is only enhanced with the ability to turn off individual cores combined with the use of parallel computing. Of course, CISC devices can turn off cores, but individual cores have far more complex circuitry that may not be in use.
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