Connecting 8-pin graphics card to a supply with 6-pin connectors

 
I appeal to the collective wisdom to wait for an answer . I leave here the details and the pictures of the equipment, at the bottom is also the list of the rest of the components to see if someone can give me a hand. Any hints would be appreciated.(*)

(*) In the Spanish version of this post there are some useful comments from visitors.

is it possible and safe to connect a graphics card with an 8-pin connector to a power supply that has 4 6-pin connectors? If so, what is the best way to do it?

Don't wait for the answer to this post. It's just the information I need and haven't found, or haven't looked in the right place.

I started looking for a mid-range 6Gb graphics card, taking advantage of the fact that they have finally come down.

To replace the well-worn NVIDIA GTX 660 Ti 2Gb I've been using since 2012, which is already starting to show obvious signs of chronic fatigue, I chose an NVIDIA GeForce GTX 1660 Super 6GB GDDR6 (which I haven't bought yet). It fits the budget and the computer can still pull it to stretch two or three more years of decent graphics life.

All the relatively new 6Gb ones need 8-pin connectors and the connection to a 6-pin power supply is a recurring doubt.

Once I've rummaged and read through seven million forums, blogs and various websites, I think I understand the theory about the current that each power connector can deliver and what each graphics card needs, but I'm at a crossroads. I don't know what to do, so I haven't done anything.

On the one hand, NVIDIA says that adapters are a bad idea, it's risky and that the best thing to do is to replace the power supply and install another one with the native connectors, while others insist that it's OK to use adapters as long as the power supply meets the power needs of the graphics card.

I start looking for adapter cables and I get half crazy. There are a lot of them and some of the comments about the experience with them are worrying.

Conectar tarjeta gráfica de 8 pines a una fuente con conectores de 6 pines

6-pin to 8-pin PCI Express power adapter cable

Supposedly there is also the possibility to use a cable (male-male) from the power supply to the card to avoid adapters.

Connecting 8-pin graphics card to a supply with 6-pin connectors

6-pin PCI-e Y-splitter to 8-pin PCI-e dual converter adapter (6+2)

Connecting 8-pin graphics card to a supply with 6-pin connectors

There is the power supply, see the graphic above with the heat traces.

Connecting 8-pin graphics card to a supply with 6-pin connectors
The power supply and its technical details

The power supply is 850 W with 80 Plus Bronze certification, enough to pull the card, which recommends a 400 / 450 W power supply.

Connecting 8-pin graphics card to a supply with 6-pin connectors

The power supply has four 6-pin PCI-e connectors and the graphics card is connected to two of them.

Connecting 8-pin graphics card to a supply with 6-pin connectors

The connectors in a bit more detail.

Connecting 8-pin graphics card to a supply with 6-pin connectors

And here the connectors on the graphics card

Connecting 8-pin graphics card to a supply with 6-pin connectors

All components are from 2012 (except the monitor)

Power supply: LC-Power LC 8850 II V2.3 Arkangel 850 W. It is assumed that is this although without a fan.

Motherboard: ASUS Sabertooth Z77.

Processor: INTEL Core i7 3770K 3.5Ghz / 3.9Ghz - 4 cores - 8MB Cache.

RAM: Memory DDR3 4GB.HYPERX 1600 Mhz 4x4 modules = 16GB RAM.

Chassis: Antec P183 V3.

Monitor: LG 29WP500-B, ultrawide 29 inches.


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