[Beowulf] difference between accelerators and co-processors

[amjad ali]

Hello All,

Is there any line/point to make distinction between accelerators and
co-processors (that are used in conjunction with the primary CPU to boost
up the performance)? or these terms can be used interchangeably?

Specifically, the word "accelerator" is used commonly with GPU. On the
other hand  the word "co-processors" is used commonly with Xeon Phi.

Thank you.

Regards,
Amjad
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