overclock

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overclock

Postby adexmont » Fri Oct 24, 2014 8:50 am

Well, i know that it make no sense to compare epiphany with my i7-920 but the question it's about the range that epiphany was tested on: intel working frequencies are from 1 ghz to 4 ghz (far range than reality) what's the range where epiphany can work ?
(it's provided without heat-sink so i suppose that it's able to be tuned up).

My point is that if you sell 1ghz device you tested it from 500Mhz to 1.5 Ghz at least, but it may be meaningless .

Thanks
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Re: overclock

Postby timpart » Mon Oct 27, 2014 12:55 pm

The is helpful, see sections 4.5 and 8.1.

The Parallella-16 chips are speced at 700MHz I think, but can run slower. The board currently runs them at 600MHz. Adapteva have expressed hopes that they will be able to increase this.

Higher speed versions of the chip (not installed in Parallella) may be able to reach 1GHz.

Regards,

Tim
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Re: overclock

Postby adexmont » Mon Oct 27, 2014 8:33 pm

Last edited by adexmont on Tue Oct 28, 2014 8:54 am, edited 1 time in total.
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Re: overclock

Postby aolofsson » Mon Oct 27, 2014 10:01 pm

The epiphany frequency on the parallella can be varied, but with the current speed grade of the Zynq and epiphany it is unlikely to reach much higher than 600MHz. To change the freq, you would need to modify the FPGA bitstream.
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