Powering Block Erupter Blade from computer PSU?

[chikon]

Hey I'm new to the forum and I have some question about the block erupter blade and powering it. I dont know if I'm allowed to post this question in this subforum but its the only one I'm able to

Alright so I'm planning on buying 1-2 Block Erupter Blades and I'm curious if I can power it with my current computers power supply (Corsair TX750W) and still have the power supply running my computer. If not why?

I have 1 AMD Radeon R9 270x gfc card
Am3+ 4.0ghz 8core CPU
1x Samsung SSD 120gb
2x 4gb DDR3 1600mhz ram

The few posts for setup of these devices that I found all said to use a seperate PSU (although none mentioned to NOT use my PCs PSU)

I understand for the most part leaving my computer on all the time would consume more power than a dedicated PSU for these boards, but I leave it on most of the time anyway

Now IF I can run these boards with my gaming rig and PSU will I be able to run both? I dont really know how to calculate these things but I understand Rev. 2 of the blades consume ~100w @ 1.2v (I think?)

Also if I need a dedicated PSU how do I choose one and calculate how many Blades I can run per PSU? (clearly is up to how many watts the PSU can supply but I doubt its as simple as "My TX750W can independently handle 7.5 blades because it has 750w and each blade consumes ~100w". Seems too easy)

Thanks for all and any help its much appreciated!!!!!

[vm1990]

sure you can do it but most people wouldn't recommend it mainly because if something send a surge or a blade goes wrong (there not really tested to the highest standards) it could cause the blades to fry and the computer to fry if your running the blades even a cheap arse power supply will do something around 550w with a good single rail (aim for about 30A) Alpine are pretty good for cheap power supplys but there are other makes

but like i say if you wanted to then yes you could another reason people dont do it is it would be very hard to get the PSU connectors to streach outside the PC case and to a position where you can mount the blades and keep everything easy to move and open for air flow

in short its just easier to use a cheap modern power supply for the blades

[chikon]

alright that seams to make sense then. I think it would be worth the investment to get an independent PSU for the blades seeing how the blades and this computer I just built are quite expensive.

I still dont understand how I would calculate the number of blades i could run on a psu or how much power needed/amps per rail. I also dont quite understand what a rail is, as you and others have mentioned it in posts. It sounds vaguely familiar from when I was learning to build a PC, but that was years ago now, and I didnt have to do anything as far as PSU goes for my new computer build because I still had this Corsair TX750w sitting around from my last build.

If you or anyone could help me out with the power questions I have I think I'll be ready to purchase the blades today and get started! Thanks!