I'm running at stock settings, 225 frequency, avg hashrate is staying right at 453 GH/s like it should
I can't overclock, cause my PSU has 2 x 6 pin per PCI-e cable, I read its recommeded to have dedicated cables (1 plug per cable) so they don't overheat when overclocking
Thanks for the info.
Nonsense! You can overclock with just 2 PCI-e connections. I have an S1 to S3 upgrade that I am running off 2 PCI-e connectors (one for each blade) and have it overclocked to freq 268.5 giving ~540GH/s.
Also, look at the thread in my signature where I overclocked an S3 (not an S3+ !) to freq 262 giving ~519GH/s with a single PCI-e connector for each blade.
Generally, so long as your PSU has the amperage in each line that the PCI-e connector feeds off, then you can use just one connector AND overclock.
No Thank you I don't want my cables to burn up, thier is a reason that S3 miners have 4 x 6 pin PCI-E its safer to use all 4 (1 cable per plug) for overclocking.
It is the proverbial taking a horse to the well but not being able to force it to drink!
Hey, its your real money that you put down for the S3 and PSU, and it is your choice whether to overclock or not. But more to the point, if your PSU PCI-e cables are not fully populated or the lines do not have adequate power, then you will not be able to OC with it.
The 4 plugs on an S3 are merely there because most off the shelf PSU's were not designed for powering a bitcoin rig but a computer. The total power that can be carried in 2 fully populated to standards 6 pin PCI-e sockets is:
(2 * (7.5 * 3)) * 12 = 540 watts => aka 2 connectors, 3 power lines carrying 7.5 Amps each @ 12 V.
That is more than enough to power the entire rig overclocked, let alone a single blade. But because of the heat management limitations of th S3, you'll never be able to use the full power in a single fully populated 6 pin PCI-e socket even when overclocked! I've tried all manner of permutations that I can concieve, even with the latest firmware where you can set the chip voltage and have not been able to draw more than 430 watts for the entire rig.
