A Beautiful Lie

Interested readers: high GPU 'power concerns' peaked w/ the release of the AMD R9 295x2 way back in 2014: TDP 450w / TBP 500w (pushing the limits of dual-8pin power); Tom'sHardware breakdown at the time ('A lot has been written about AMD’s flagship violating standards and specifications') message clear: forget 20g, 18g minimum, 16g preferred --> The Math Behind GPU Power Consumption And PSUs ... easy to apply that same lesson to today's Nvidia 3000/4000 

Advice: pay someone to make a 4+4 CPU cable, using a 12pin connect = x4 12v top row / x4 ground bottom
Advice: buy an empty 12pin & empty 4pin or 4+4 + pre-made 24"/600mm wires with female-to-female PSU ATX pins attached & make your own cable (using pinout below)
***Contact MainFrameCustom.com, ask if they'll make u a cable or sell u the parts to make it (ie x4-x8 pre-made female-to-female wire sleeved or un-sleeved + empty 12pin & 4pin / 4+4)
 
The color pinout was made from my X1250 XM1 & is identical for my 1000w Platinum (same as OP)
Note: for the 6pin SATA, there are in fact two live 12v pins (one is unused, both are shown)
Note: the lower 10/18 ATX, 'star icons' are sense wires, & the numbered color chart is relative to the 24pin
Note: all of the 12volt & most of the grounds for CPU/PCI-E wires are 16awg (dual-grounds are 18awg)


Original CPU #2 cable shown below, housed in a 12pin with solid 8pin EPS connect (x8 16awg)

EDIT: If what u did was insert a solid 8pin EPS/CPU connector into the 12pin, for a volt/ground reading w/a DMM, I  have an empty 12pin (male) & yes the solid 8pin will insert (key) into it but it will not latch together. If an inability to 'latch' an 8pin to a 12pin doesn't bother you, you might buy an EVGA CPU 4+4 cable (see eBay), since their G2 P2 T2 G3 pinout for CPU port is the standard 12volts top row / grounds bottom row ... if you know how to back the PSU terminals out & put them back in, you could then buy an empty 12pin (MainFrameCustoms etc) & transfer it onto the EVGA 4+4

To be fair to the buying public, I find it irresponsible for you to promise buyers that their desktop 'will have proper cable management done'. I'm struggling to understand why you would place your reputation on the line like this. Their idea of poor factory cable mngmnt is & always has been one click away to the latest owner unboxing videos on uTube. The same cable set in your test rig there has been in production for 3years now. it's the same cable set that Gamespot called out in 2014: 'Similarly disappointing are the modular cables, which are your basic mismatched OEM set, and again, given the cost, it's odd not to find a more aesthetically pleasing and sturdier set of wrapped cables inside'. 2009, 2014, 2017, nothing's changed. Most wires have no sleeve, some cables are only half-sleeved, the rest have reduced sleeve counts, all of it purposely done as a cost-cut, a budget set quickly hewn into a rat's nest by factory workers, no attention to detail, same as always. You should retract your statement that buyers will receive better than what they already saw, or amend it to say you 'hope' they do, because that is all you can say in good faith. It is Ill advised to rush to this company's defense the way you did. Show me one desktop in their 20year history that had proper cables & management

To be fair to the buying public, I find it irresponsible for you to promise buyers that their desktop 'will have proper cable management done'. I'm struggling to understand why you would place your reputation on the line like this. Their idea of poor factory cable mngmnt is & always has been one click away to the latest owner unboxing videos on uTube. The same cable set in your test rig there has been in production for 3years now. it's the same cable set that Gamespot called out in 2014: 'Similarly disappointing are the modular cables, which are your basic mismatched OEM set, and again, given the cost, it's odd not to find a more aesthetically pleasing and sturdier set of wrapped cables inside'. 2009, 2014, 2017, nothing's changed. Most wires have no sleeve, some cables are only half-sleeved, the rest have reduced sleeve counts, all of it purposely done as a cost-cut, a budget set quickly hewn into a rat's nest by factory workers, no attention to detail, same as always. You should retract your statement that buyers will receive better than what they already saw, or amend it to say you 'hope' they do, because that is all you can say in good faith. It is Ill advised to rush to this company's defense the way you did. Show me one desktop in their 20year history that had proper cables & management