Hi, My first rig build is going to be: GPU: 6 x Galax GeForce GTX1070Ti EX Sniper White 8GB GDDR5

CPU:Intel Celeron G3900 Dual Core LGA 1151 2.8GHz Processor

Power Supply: Corsair HX1200M 1200W 80 Plus Platinum Modular Power Supply

SSD:Kingston SSDNow A400 120GB 2.5" SATA III SSD SA400S37/120G

Motherboard: ASUS PRIME H270-PLUS LGA 1151 ATX Motherboard

RAM: Crucial 4GB (1x 4GB) DDR4 2400MHz Memory

6 powered Risers and a open air frame.

Do i need to purchase any additional wires of anything to get my rig running or do i have all i need??
Should this be fine to just plug into a power outlet or do i need to check if it can handle it first? I live in Australia if that helps.

Wall power meter:

If I could find a GOOD MOLEX riser, I'd go with it - but so far no luck.
The all-in-one risers I've gotten from COBOC via Newegg have been hassle-free.
The Mintcell all-in-one risers worked, but the USB cable was iffy and had to be replaced to work well on one.

make sure the risers are isolated from the case.

You don't mount DIRECTLY to the aluminum as such, you use spacers - both MB and riser cards have "isolated" mounting holes so you can get away with using brass or steel spacers.

Iron is close on conductivity to aluminum.
Both are somewhat inferior to copper silver and gold but ALL of them are "conductors" and conduct electricity well.

 Many high-tension power lines back in the past used an iron core with copper electroplated to that core.
 Today the core is usually aluminum due to it being lighter while still being stronger than copper.


 Riser cards ARE fairly standardized - that's why you see so many folks offering the "same version" risers.
 I have no clue who originates the design for each version.

It never hurts to use TOO BIG of a wire, except where cost is a factor.

 Runs cooler, less IIR losses (though usually not a BIG difference on those factors for only going "one step" bigger).

The default PSU connectors should be fine for that purpose, assuming nothing is defective. A quality cable *should* be able to handle both 8-pin connectors under load, and the 8-pin + 6-pin configuration that you described substantially less than that.

It's about the wiring, not the PCI-E spec itself.
I don't think they anticipated folks using wiring runs long enough for IIR losses to cause issues, or enough losses to cause noticeable voltage drop to the connector.

Should be fine. My total length of cables is about 2.5ft. I use extenstions/adapters to go from 6pin to 8pin.

 It's hard sometimes - but oftentimes one of the leads on the +12VDC side will be brown, other times it'll be smaller gauge, other times there is just no way to tell because they used all the same wires for "economy of scale in purchasing" reasons.

 SATA connectors THEMSELVES are only rated for 54 watts of +12VDC draw, while the PCI-E spec for the bus allows for 75 watts draw.

 MOLEX are rated over 150 watts on the connector, the WIRING is what you have to watch there if you put more than one riser on a chain.

 PCI-E 6-pin using *2* +12VDC lines is good for almost 200 watts, the ones (not actual PCI-E spec) that have 3 +12VDC lines are good for 288.

 Molex and PCI-E 6-pin to riser are safe, SATA is problematic and often UNsafe.

 Keep in mind that the power conversion circuitry on the risers is NOT 100% efficient, so your actual draw from the power connector will be a little MORE than what the card itself is actually pulling.


 The only issue I have with the Mintcell risers to date is that once in a while the USB cable itself is iffy - but they're standard cables and cheap/easy to replace when that happens.

No it is not safe. Actually depends on the current draw through the wires. There were couple of incidents when I almost caught a fire.  On my first rig when I connected 3 risers with 3 sata/molex adapters, the temperature of wires was around 70C, luckily I have a infrared/thermal camera.  So never connect risers with adapters more then 2 in parallel. The other day the contact of one adapter burned out, and happily a rig just hanged. These adapters usually are cheap and wires gauge could be lower then needed.
One more example of what could possibly go wrong with the wires (don't related to the adapters):
This outlet was a first in line and nothing was plugged in it, the rig was connected to the last outlet in the line. The outlet was hot around 80C. So you can see someone, maybe the previous tenant, used wire connectors and wrong wire gauge to connect 15 amp outlet in 20amp line.

they are max rated for 185w
when mining they will only consume 90w single mining
and 110w dual mining
using molex is good enough for rx580
and 6pin will obviously be the best