Hi guys, I'd just like to first of all introduce myself as the developer of the BlightyCoin miners. Just want to respond to a couple of questioned raised recently.
First of all just to backup what my associate was saying earlier about the PSU. The power supply for the single card machine (lite) is a 500W OCZ PSU, where as the dual card machine (duo) is 600W. Both more more than enough to handle the system and are designed to be very efficient for the system. I have personally tested the dual card machine for a month or so running all the time, and so far have ran into no issues.
I'd also like to clarify the hardware going into these machines.
Both machines contain:
AMD Sempron 140 CPU. (2.7ghz)
1GB DDR3 1066mhz RAM
160GB generic SATA hard drive
A USB storage medium was suggested, however as discovered in early prototyping it was not practical to have a system constantly booting from USB. USB devices can fail over time especially if they are continually accessed on a 24 hour basis. Also there was a very long boot up time which was deemed unacceptable for the machine.
Also suggested in early prototyping was using an SSD as these use hardly any power at all. This is very true, however it would take you a very very long time to make your money back in electric costs so this to me seems a bit of waste of money. Though this is up to your own interpretation, but its not worth it in my opinion.
The 'lite' edition includes these extra components:
Asus M4A78LT-M motherboard - a efficient, low power motherboard designed for one card only. Just to note, it will not be possible to upgrade from a 'lite' edition to a 'duo' edition machine.
1 Sapphire ATI Radeon HD 5850 Extreme 1024MB GPU - Best watt per m/hash card on the market today.
The 'duo' edition includes these extra components:
Asus M4A88T-V EVO motherboard - a 'step up' from the lite edition motherboard but fully compatible with two GPUs.
2 Sapphire ATI Radeon HD 5850 Extreme 1024MB GPU - These will not be running in crossfire. Early testing showed that crossfiring the cards resulted in some system instability and some loss in performance. Also noticed was occasionally miners would crash, stop responding or simply not work at all.
The 'cased' option for both our systems uses a
Cooler Master Elite 370 case. This has more than adequate cooling, however to ensure optional performance in 'warm' conditions, the duo edition will include an extra high performance fan on the front on the case.
If anyone else has any questions, just let us know. Thanks!