how to overclock fpga or asics

[61197da925c1]

has this been done before?

[Photon939]

All current FPGA implementations are already running very close to their max operating speed, bitcoin mining involves toggle rates that significantly exceed typical FPGA implementations which creates a lot of heat. BFL singles are known to be unstable and throttle back on speed if the cooling system isn't 100% flat on the chips.

ASIC is another matter but seeing as how no offerings are currently available to consumers, any information regarding maximum frequency and clocking headroom is unknown.

[hanz]

I own a BFL Single (the FPGA which should do 832 MH/s) and it takes extra cooling to get to that speed. When it is warm (as it is in my office) it runs below that. I currently run it at 800 MH/s.

(You can upload firmwares with different speeds to a BFL Single.)

So... one could say it is overclocked when it is shipped. There is no headroom for extra overclocking (or you should use cooling methods like phase changers etc. and write your own firmware).

[zxyzxy]

you can overclock ASIC by using different firmware, but really.. is it worth it? those extra few MH/s? if you have options how to cool the chip down, try it i guess

[IRCCo Jeff]

you can overclock ASIC by using different firmware, but really.. is it worth it? those extra few MH/s? if you have options how to cool the chip down, try it i guess

I would be more concerned about the risk to the hardware. ASIC's are too expensive to play around with like that.