No video card comes with cables because you absolutely must use cables that are compatible with your power supply.  A corsair cable with an evga power supply (or vice versa) could fry your gpu because power supplies don't have standard wiring for cables.  I picked those two brands at random and don't know for sure whether they're compatible - it's possible they'd be ok, but the point is that it's always best to make sure your power cables work with your specific brand of power supply.

dacortes02
So the new 850 sfx psu Evga just released cant be used on their own 3090 cards because they only have 2 pcie plugs on it? I haven't opened mine up yet but I think it only comes with 2 daisy chained cables to fit into the 2 pcie plugs.

Two time two equals four.  It has enough 8-pin PCI-E connectors to plug into four 8-pin PCI-E plugs.
 
Four is greater than three.
 

PCIe | 4x 8pin (6+2)

https://www.evga.com/products/product.aspx?pn=123-GM-0850-X1

dacortes02
The reason I asked is because according to most people on this post you shouldnt use the daisy chained pcie cables so yes in theory this psu has enough connectors but it only uses 2 pcie plugs (which again most people say do not use). 
 

The short answer: That isn't true.
 
The long answer: These EVGA FTW3 cards have been problematic.  Particularly the 3090 FTW3.  As such, people have gotten paranoid and superstitious.  Their reasoning isn't based on fact; instead it is based on fear.  Funnily enough, in a poll of users on this forum, the great majority who responded who had their card get the "red light of death", were using 3 separate non-daisy-chained connectors.  Many used the 3 separate non-daisy-chained connectors out of fear of what they read on this forum, yet their card still died.
It's simply nonsense.  Ask EVGA yourself.  What EVGA will say is that they will always recommend 3 separate cables due to greater margins of safety and out of an abundance of caution, but daisy-chaining is perfectly acceptable otherwise, for PSUs which come with the necessary cables.  The justification is that IF the power supply CAME with the daisy-chained wires, those wires were engineered of the proper size, insulation, and pins and sockets to handle the amperage required.  It is only using aftermarket wires or adapters, or mixing wires or adapters between different PSU brands or models, that you should strictly avoid; because you can't be certain that everything in the combination was rated for it.
 

 
The real problem with these FTW3s is the design of the voltage regulation circuitry causing power balancing issues, incorrect measurements, and poor reactions, which blows the fuses on some cards.  I haven't seen a single one of these cards with a melted PCI-E cable.

Anecdotal evidence on my behalf but I disagree. I had a PS-SX600-G psu with a 16AWG 8pin to (2) 6+2 cables plugged into a 1080ti ftw3 which draws 280W max. 280W at 12V is 23.3amps. 16AWG is rated for 13amps. Long story short, drawing more amps than the cable was rated for caused the cable temperature to increase, increased temperature means more resistance, more resistance means more amps to maintain the wattage. The pcie cable melted and became fused to the psu. I should have done the math to make sure it was safe to operate but assumed because the cable came with the power supply it was safe.

zacharya1990
I had a PS-SX600-G psu with a 16AWG 8pin to (2) 6+2 cables plugged into a 1080ti ftw3 which draws 280W max. 280W at 12V is 23.3amps. 16AWG is rated for 13amps. Long story short, drawing more amps than the cable was rated for caused the cable temperature to increase, increased temperature means more resistance, more resistance means more amps to maintain the wattage. The pcie cable melted and became fused to the psu.

Your math is wrong. You can't just say 16 AWG is rated for 13 amps (which is not strictly true by the way -- it depends on length, temperature, altitude, material used, etcetera) and say that 13 is less than 23 and therefore is not enough. You forgot that you have more than one 16 AWG wire. Divide by the number of wires.

Actual math:
280 watts - 67 watts provided by PCI-E slot = 213 watts
213 watts / 12 volts =~ 18 amps
18 amps / 3 wires = 6 amps per wire needed
16 AWG can handle more than 6 amps per wire, easily

Your PSU was obviously faulty or simply shoddy. It is obvious that the contacts didn't handle what they were designed to handle. Did you contact the manufacturer?

amutlaq
If your PSU didn't come with those cables, try getting one from cablemod. Make sure you put in all the precise info.

That's exactly what EVGA and others suggest NOT to do. You don't know how shoddy the PSU is and whether the contacts and traces in the PSU can handle what the wires are able to handle. If the PSU came with the wires, you would hope that any respectable PSU brand would ensure that all of their parts are up to the task. If the PSU didn't come with the wires, don't make that assumption.

Yeah i had issue running power from a single cable split on the same rail, pc kept hard booting randomly when surfing the web. Best bet run seperate cables maybe even on separate rails if you can. 

All PSUs come with the necessary power cables, worst is when you only have 2 extension PCIE cables they need to start selling with 3

Hey brother i just got my hands on a 3080ti i got the same new 850 SFX PSU but it only has 2 pcie slots so that means i can use one daisy chained cable and one by itself coming from the 2nd pcie slot on psu ?

justin_43

X-NOOB
Hello!

I see these new cards have 3 of the 8 pin connectors, but my psu has only 2 cables. However, those 2 cables are split into 4+4 and 6+2 each. Would I be able to power this card with 1 cable connected to 1 connector and daisy chain the 2 other connectors with the other cable?

P.S. I have a Corsair HX750

No you need a new PSU as well. See above post.

Wait is my PSU ok for 30-series? I'm not expert but I think my PSU has 4 separates 6+2 connectors, right? Or are they just split by the inside?
 
Picture:
 

 
Product site:
https://www.evga.com/prod...aspx?pn=220-P2-0750-X1
 

Those cables often come with your PSU, not your GPU.

Sir_Sizzle77
I've been seeing a couple questions about cards coming with cables in different threads.  Did this used to happen?  I've only seen, at most, an adapter cable come with a gpu and nothing more.

I can't remember it ever happening, at least from 2008 and beyond. I've only ever seen adapters to convert power and video adapters.

Sir_Sizzle77
I've been seeing a couple questions about cards coming with cables in different threads.  Did this used to happen?  I've only seen, at most, an adapter cable come with a gpu and nothing more.

Your probably thinking of the dongle thingy that comes with FE cards from Nvidia.

Doesn't the 150w rating for a single 8pin connector stands for the connector regardless if the connector is daisy chained or not? I'd expect a 300w GPU (theoretically, 300w is too close for comfort I think) that requires 2x 8pin to run perfectly fine with a daisy chained 2x 8pin connectors coming off a single cable.

I know this is an old thread but holy crap are people wrong. First, the pcie slot itself provides up to 75 watts (before even going to pcie external power from the psu) so the 2 connectors have to provide 300 - 75 = 225 watts. If the psu supplies a daisy chained pcie (and from a reputable brand) the wire itself will be speced to over 300 watts at 12v but the spec says that a connector can only provide up to 150 watts. Daisy chained cables are perfectly fine and many tech channels have done extensive testing to show there is no difference.
 
Most PSU manufacturers use 18 AWG cable which is rated to 16 Amps @ 12 volts which gives you 192 watts. The PCIe 6+2 pinout contains 3 x +12V pins which gives a total available wattage of 576 watts per cable out of the PSU. Split that in half with daisy chaining and that is still 288 watts per 8 pin connector available which supersedes the 150 watts per connector standard. Not sure why people who were arguing on this ignored the fact that there isn't just a single +12V cable in the PCIe spec. 
 

ty_ger07

zacharya1990
I had a PS-SX600-G psu with a 16AWG 8pin to (2) 6+2 cables plugged into a 1080ti ftw3 which draws 280W max. 280W at 12V is 23.3amps. 16AWG is rated for 13amps. Long story short, drawing more amps than the cable was rated for caused the cable temperature to increase, increased temperature means more resistance, more resistance means more amps to maintain the wattage. The pcie cable melted and became fused to the psu.

Your math is wrong. You can't just say 16 AWG is rated for 13 amps (which is not strictly true by the way -- it depends on length, temperature, altitude, material used, etcetera) and say that 13 is less than 23 and therefore is not enough. You forgot that you have more than one 16 AWG wire. Divide by the number of wires.

Actual math:
280 watts - 67 watts provided by PCI-E slot = 213 watts
213 watts / 12 volts =~ 18 amps
18 amps / 3 wires = 6 amps per wire needed
16 AWG can handle more than 6 amps per wire, easily

Your PSU was obviously faulty or simply shoddy. It is obvious that the contacts didn't handle what they were designed to handle. Did you contact the manufacturer?

amutlaq
If your PSU didn't come with those cables, try getting one from cablemod. Make sure you put in all the precise info.

That's exactly what EVGA and others suggest NOT to do. You don't know how shoddy the PSU is and whether the contacts and traces in the PSU can handle what the wires are able to handle. If the PSU came with the wires, you would hope that any respectable PSU brand would ensure that all of their parts are up to the task. If the PSU didn't come with the wires, don't make that assumption.

 
Missed this post while I was reading this thread but this is pretty much spot on. Granted most PSUs only use 16 AWG on the CPU 4+4 connectors and 18 AWG on the 6+2 (atleast from what I can find from some PSU specs from Corsair and Seasonic). Also the PCIe is speced at 75 watts not 67.