Post
Topic
Board Group buys
Re: [SIDEHACK STICK] Official sales thread for everywhere not already covered
by
novak@gekkoscience
on 04/09/2015, 17:43:30 UTC
The new top clock is 500MHz which is the highest I have hex values for.  That's pretty sporty for a USB stick as 425MHz was pulling about 2.5 amps on the USB port.
Yeah, things get a little 'interesting' electronics-wise Smiley  As sidehack mentioned, the connector isn't even remotely rated for that.

I've got a whole sheet of frequencies and hex values, but most of them are unlikely combinations of the various multipliers/dividers and some overlap; e.g. 200MHz fits 00111110000011 (0f83) and 00011110000010 (0782).  The latter is what is specced in the chip's datasheet - the series difference between them being the output divider value.  There's values well over 500 but I haven't even remotely approached 500 as it fails to initialize long before then Smiley  Looking forward to the new drivers - might poke at bfgminer as well, glad there'll be support in both Smiley

I've just been using the same hex values as the S5 (view source on the config page) so I haven't had trouble with them yet.  I got the stick to run at 450MHz but so badly it's hashrate was lower than 425MHz, and there were so many errors it probably was worse than 300MHz.  Also just a note:  I think Luke-Jr is planning to release support soon but as far as I know right now you need to build the "compac" branch on his github if you want compac support on bfgminer.

will you soon have a link to load the new version of cgminer.  I would love to run at 325 or 350.  vs 250.

Yeah I intend to post it this weekend.  The compac seems to do ok at up to 200MHz or so on stock ~=0.6V voltage, you probably need to bump it a bit to go over that, and 300MHz probably needs close to 0.7V.  If you only have stock USB power you can get it to run 150MHz or less actually undervolted to maybe 0.58V (this is under spec for the chips so it may or may not work on a given stick but I've seen it).

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novak