[SOLVED] Can I use PCIe adapters for new Graphic Card which needs...

[KaLaGio]

Hi there,
I need to now is it safe to use PCIe adapters for new GPU which I'm thinking to upgrade, I have gtx 660 ti now, PSU: thermaltake 630 smart +80 (old version)
which has only 2x6pin for PCIe connector thats enaugh for gtx 660 ti, but I want to buy amd rx 580 8gb, this card requires 1x6pin and 1x8pin. Should I upgrade PSU?

 

[Wolfshadw]

Yes, you should upgrade to a better power supply. Rule of thumb is if the power supply does not have the necessary PCIE power cables, you should not use it for your new graphics card.

-Wolf sends

 

[KaLaGio]

Thank you for advice, but why? can you explain in detail?

 

[Wolfshadw]

The graphics card gets up to 75 watts of power from the PCI-Ex16 expansion slot in the motherboard. Any card that requires more than that has auxiliary power ports. The 6-pin port provides up to an additional 75 watts of power. The 8-pin port provides up to an additional 150 watts of power.

The 6-pin power cables from your power supply can only provide up to 75 watts of power. If you use an adapter to plug your second 6-pin power cable into your graphics cards 8-pin power, it doesn't magically provide more power, Your current power supply could just shut down or it could burn out and fry any components it's attached to; including your shiny new graphics card.

-Wolf sends

 

[KaLaGio]

Rx 580 needs about 150watt to 190watt, if PCIe slot give us 75w and two of my PCIe cable capable to charge card 75w+75w why does it not enaugh?

 

[Wolfshadw]

If the the maximum power draw of the card was only up to 190 watts then it would not have an 8-pin power connector. But, you know. It's your equipment. Do whatever you want with it.

-Wolf sends

 

[KaLaGio]

Ok. I will not go to risk. So if I can find kind of rx 580 version that has only 8pin slot then what do you think is it safe to use adapter only 1 cable finish? (6pin to 8pin and second 6pin will not be used).

 

[Wolfshadw]

8-pin power port means up to 150 watts draw from the power supply cable.
6-pin power cable means up to 75 watts provided from the power supply cable.

What do you think happens to a power supply when a graphics card tries to draw 76 watts or more from a power cable that can only supply up to 75 watts?

IF you could find an RX 580 and only has one 8-pin power port, you COULD use a 2x6-pin to 1x8-pin adapter cable. Something like this:
https://www.amazon.com/EVGA-6-Pin-Female-8-Pin-Cable/dp/B00M49SELW

But again, I do not recommend using adapters. Not when it comes to power.

-Wolf sends

 

[KaLaGio]

Thank you again 😊

 

[Kjellebel]

Hi there,
I need to now is it safe to use PCIe adapters for new GPU which I'm thinking to upgrade, I have gtx 660 ti now, PSU: thermaltake 630 smart +80 (old version)
which has only 2x6pin for PCIe connector thats enaugh for gtx 660 ti, but I want to buy amd rx 580 8gb, this card requires 1x6pin and 1x8pin. Should I upgrade PSU?

Yes. It's good that you would buy one with 2 auxiliary power cables, as these generally should enhance stability.

I have a few Asus RX580s, that only have one 8 pin power connector + the motherboard slot for at least the 66 watts it supplies via the 12 Volt pins of the connector. Should it sound a bit insane when there's 8 pins on the other side...There's 2 combination that can easily fry a GPU and more should a certain combination of currents and or failed components occur. This has been minimalized by the community, by adapting voltages, TDP, individually tying certain frequencies to timings to voltages, to containing the 150-180 watts from frying the card with stock setting, by raising the amount of power that can be brought to the cards even further to enhance stability.

And what isn't solved by better throttling or no single-volt high current VRAM power lying around in the case of component failure...can be solved by countervolting, more ins and outs, higher currents and TDPs... by one or 2 card manufacturers, like XFX and MSI for example.

The RXes are garbage, and many cards are still being sold as the fire hazard they are, without any form of enhancing consumer safety. When you fry one you've had longer than a month, you get a new one. So you can fry your computer again.