#CABLE FOR MAC PRO TO WINDOWS VIDEO CARD KEYGEN#
Just to clarify: the ONLY purpose of the two extra pins on the 8 pin connector are to indicate that the board may safely draw up to 150 watts on the connector.
A very small number of people have their homes burn down. To put things in perspective, thousands of people exceed the maximum limits for strings of Christmas lights every year. Or in a worst case (and admittedly relatively low probability) you could fry your motherboard and/or start a fire. Having said this, the choice is ultimately up to you and you may encounter no problems whatsoever - regardless of the fact you are exceeding the specifications. So what is the answer? You should not use a 6 pin cable in a 8 pin socket UNLESS you know that the card supports a modified power profile based on the sense pins. If the consumer plugs in the 6 pin cable and disregards the published requirements the manufacturer is not at fault. It is cheaper for the manufacturer to put on the 8 pin connector if they need more than 75 watts at the connection and publish the overall power requirements of the card. This however is likely to increase the cost of the card, and therefore unlikely for consumer cards. It is therefore possible to have the card modify its power profile depending on the cable plugged into it.
It is technically possible to design a card that can sense whether a 6 pin or 8 pin cable is plugged into an 8 pin socket, that is the purpose of the second sense line. If you only need 75 watts at the connector, you can plug in either a 6 pin cable or an 8 pin cable. The 8 pin cable is backwards compatible with the 6 pin connector, so there is no concern with the wiring harness of the computer. The 8 pin connector is more expensive and takes more board real estate. There is absolutely NO reason for a graphics card manufacturer to put an 8 pin connector on a card UNLESS it requires more than 75 watts at the connector. But there are no guarantees that this will work acceptably for any individual computer. there are variations in tolerances and headroom factors that come into play. It is clear to me that using a video card with either a 6 pin/8 pin combo or a dual 8 pin combo in a mac pro without an auxiliary power supply is exceeding the power budget of the computer and therefore posing some risk of intermittent behavior or possible component damage.ĭoes this work acceptably for some people? Sure. I think it is time for an electrical engineer's perspective on this.
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