Monday, February 27th 2012

GK104 Board Draws Power From 6+8 Pin Connectors, 3+2 VDD Phase Power Supply

The top desktop graphics card based on the NVIDIA GeForce Kepler 104 (GK104) ASIC, which has come to be known as GeForce GTX 670 Ti, is reported to use a 5 NVVDD phase power supply (VRM) design that draws power from 6-pin and 8-pin power connectors. The card will hence have 300W of power at its disposal. NVVDD phase 1 and 3 will be wired to the 6-pin connector; phase 2, 4, and 5 to the 8-pin connector. NVVDD phases 2, 4, and 5 feed power to the GPU, while phases 1 and 3 power the GDDR5 memory and other components on the board.

Source: VR-Zone
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36 Comments on GK104 Board Draws Power From 6+8 Pin Connectors, 3+2 VDD Phase Power Supply

#1
brandonwh64
Addicted to Bacon and StarCrunches!!!
m1dg3t said:
6 + 2 connector can't be that special if you can use a molex adapter to power it :o
It is special in its own way. It is made of higher gauge wire and on its on phase/block/rail It is meant to be used on PCIex cards only. If you use a molex adapter, you are sharing it with other molex plugs such as HDD/DVD/fans. This applies on most PSUs
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#2
m1dg3t
99% of PSU's use the same gauge wire's from what i have seen :o

I was saying that because most (from what i have seen) of the molex > 6 + 2 run a dual molex (3 wire ea) into a single 6 + 2 so ya :confused:
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#3
Steevo
brandonwh64 said:
It is special in its own way. It is made of higher gauge wire and on its on phase/block/rail It is meant to be used on PCIex cards only. If you use a molex adapter, you are sharing it with other molex plugs such as HDD/DVD/fans. This applies on most PSUs
Most 12V single rail have all the yellows soldered in together. All of the same gauge. So really a 6 pin is capable, its just how thick the wiring is and how many amps it can carry.


I just took apart another PC power & cooling 750 to use as a 12V power supply, and it is all the same inside it. Reviews tested it up to a total of 60 Amps on the 12V rail.
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#4
brandonwh64
Addicted to Bacon and StarCrunches!!!
Steevo said:
Most 12V single rail have all the yellows soldered in together. All of the same gauge. So really a 6 pin is capable, its just how thick the wiring is and how many amps it can carry.


I just took apart another PC power & cooling 750 to use as a 12V power supply, and it is all the same inside it. Reviews tested it up to a total of 60 Amps on the 12V rail.
Yea those are very strong PSUs and the main reason is the single rail. Most of these multiple rails are the ones I was talking about.

I have had great luck out of single rail PSU's
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#5
Arctucas
brandonwh64 said:
It is special in its own way. It is made of higher gauge wire and on its on phase/block/rail It is meant to be used on PCIex cards only. If you use a molex adapter, you are sharing it with other molex plugs such as HDD/DVD/fans. This applies on most PSUs
Hmm... OK.

All I will say is the 6-pin and 6+2-pin cables for my PSU both use 18AWG conductors.
Posted on Reply
#6
m1dg3t
Steevo said:
Most 12V single rail have all the yellows soldered in together. All the same gauge
That's why they are called single rail unit's, multi rail unit's split the load across several rail's but the source is still the same IIRC

Dunno if i make any sense, looooong weekend :roll:

I would never buy a multi rail PSU
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#7
brandonwh64
Addicted to Bacon and StarCrunches!!!
Arctucas said:
Hmm... OK.

All I will say is the 6-pin and 6+2-pin cables for my PSU both use 18AWG conductors.
I say some not all
Posted on Reply
#8
m1dg3t
brandonwh64 said:
I say some not all
Now that the cog's are turning i think i recall something in my OCZ literature (or a review i read) mentioning increased wire size for certain connector's on my new PSU zx850w, i actually think they are the 6 + 2 pin's for the GFX card's and the main ATX!! :laugh:
Posted on Reply
#9
Casecutter
btarunr said:
GTX 670 Ti[/URL], is reported to use a 5 NVVDD phase power supply (VRM) design that draws power from 6-pin and 8-pin power connectors. The card will hence have 300W of power at its disposal.
In all probably what’s exactly demanded for such Uber/FTW versions to get above the 7950. That PCB and power section doesn't come cheap normally, so definitely a $400+ price tag. If true it kind of tells us the Kepler is still not any more power efficient than Fermi.

Here the problem those type of expensive to manufacture boards aren’t normally a long standing production offerings that don’t ever see the price breaks. So it means to me they’ll make a presence short term then disappear as soon a prices start to adjust. Nvidia and their AIB’s will get pressed in price and then they’ll be gone from the market in a few months.

Sure there will be the more "generic" GTX 670 Ti's that might have both 6/8pins, but that will be for the more DIY OC’r, but those more generic OC versions (more or less competing with 7950) will hold to a 225W TDP and not offer as robust power sections.
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#11
m1dg3t
Crap Daddy said:
You mean the 7950?
I sure as hell hope he mean's the 7950! If this gk104 can't keep up to a 6950 i think someone is in trouble!
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