I hope this is the appropriate location to ask this.
I just got an EVGA SuperNOVA 1600 T2 to replace my old SilverStone ST1200 which doesn't have enough amps on the 12v line to power my GPUs (it's not the new/current SST-ST1200) I'm trying to kind of "future proof" my rig for later upgrading.
Now, I've heard that the EVGA uses 16awg vs the typical 18AWG. While I've read that I should be fine with running 18awg extensions for my connections, I'm redoing all my cable work either way so I figured I would use 16awg on my GPUS easy enough and the EPS cable as well, but the 24pin connector is a concern because my build will have a flat ribbon ("Corsair Style") cable straight off the MB then immediately under it with as little wire showing as possible.
Also of note/considerations, I'm looking at upgrading in a few years, atm my upgrade of choice woudl be an asus x99-we w/i7, which uses more power off the MB. I believe the m.2 ssd uses power off the PCIe and I intend to get one off those as well (which GPU's tax PCIe onboard power a bit already yea?) So now what about the 24pin connection? As I understand it the EPS powers the CPU, so does the mean that the 24pin power's the PCIe's?
If the 24pin powers the PCIe's then could I just go 16awg on the 12v lines and grounds, and leave the rest at 18awg, or would I need to do the whole cable in 16awg? You can do sense wires in 22awg yea?, so am I right in presuming that the 3.3 and 5v cables could be done in 18awg no problem? And/or that 16awg would never be necessary on those wires?UPDATE
: a detailed study of EVGA's stock cables answered a lot of my questions above - they mix 16, 18, 20, and 22 gauge for various reasons, so it's clearly okay to mix the gauges as they did to make my 24pin MB ribbon cable "thinner." They also use 22awg off the psu for sense, 3.3v, 5v, and one of the 12v wires so I think as long as I match their stock gauges I should be good. EVGA however doesn't recommend extensions as the added length interferer's with resistance and such so I'll have to make some adjustments. (Still wondering about the following question, if any computer engineer/PCB studier happens to know if there's a set pathway for the PCIe slot power (like the 12v pin #10 on the connector feeds PCIe slots 1 and 3 or w/e,) that'd be great, then I could just make sure to put 16awg on those.)
As an... alternate solution, maybe, I've found a gizmo by EVGA that basically plugs a molex straight into an unused PCIe slot and powers the PCIe lane on the MB just like a direct molex on the board would. (http://www.amazon.com/gp/product/B005OTXUYU?psc=1&redirect=true&ref_=oh_aui_detailpage_o06_s00
) A few trusted reviewers have indicated that while it's likely unneeded they do find it smooths out the power flux on PCIe lanes in crossfire etc. So I figured it couldn't hurt and I went ahead and got one, so the secondary question is, if I've got this thing plugged in on the MB, should I still switch over to 16awg on the 24pin or no?
~ Basically I'm trying to limit the width of the 24pin cable so it doesn't interfere with the connections of other plugins near the 24pin, I don't want any "stacked" ribbons wrapping around the edge of the mb. Like a lot of MB's have the 2.0 USB plug right next to the 24pin and stuff, I just don't want to run into a stacking issue with later upgrades. AKA I'm being picky hehEdited by Mystriss - 10/23/15 at 12:25pm