Can AMD dual graphics (APU + GPU ) be activated on demand?

santiagozky

I've been thinking on building a pc with an AMD A8 7600 with a r7 250 card. I'm looking for something that can do some light gaming while keeping consumption as low as possible. The APU+ GPU seems like a reasonable solution but I have some questions

  • Can the dedicated gpu be turned on and off on demand like some laptops switch between integrated and dedicated gpu?
  • Does turning off dual graphics actually turns off the gpu? is it consuming (noticeable) electricity when off?
user438322

AMD has power saving stuff built in already. I believe it should do what you want out of the box assuming the APU is considered the primary card in crossfire. If you run crossfire with multiple dedicated cards then when you are not using the GPU the non primary cards automatically power down to a sort of sleep mode where their fans don't even spin and they are only about 10 degrees above ambient.

However, that being said I would recommend you do some research and be absolutely sure that you want to use this set up. Crossfire can be a bit of a pain and I would not do it with such a weak card. You would likely be much better off with even say an R7 260X. The typical advice is to buy the best single GPU you can afford and not to go dual GPU unless you are buying one of the best GPUs available.

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