The enablement of the ZeroCore Power feature is controlled by the driver. ZeroCore Power state maintains a very small bus control block to ensure that GPU content is still visible to the operating system and BIOS. In the ZeroCore power state, the GPU core (including the 3D engine / compute units, multimedia and audio engines, displays, memory interfaces, etc.) is completely powered down. So what's happening there you might ask ? Well, as soon as the system goes into long idle state and applications are not actively changing the screen contents, the GPU enters the ZeroCore power state. So when the unutilised GPU is more than 95% it can almost shut 99% of itself down, even the ventilator will spin down and disable itself (which is a little freaky when you first see it really). A new precedent was being set with the initial R7000 launch though though as in desktop idle mode, the graphics cards only consume 2.7 Watt. That changed dramatically on the 40nm nodes and product towards a much better ~20 Watt. AMD however focused on idle states as well, when you are in desktop mode for example in the year 2008 on 55nm a graphics card would draw up-to 90 Watt. The R7 260X has a 115 Watt TDP, the R9 270X does a 180 Watt TDP and the R9 280X has a steep rated peak TDP (maximum power draw) of 250 Watt, and last one really is quite a bit. You do need a PCI-E 3.0 compatible motherboard and processor though. ![]() That results in 32GB/sec bi-directional bandwidth. So a Gen 3 PCI Express x16 slot is capable of offering 16GB/s (or 128Gbit/s) of bandwidth in each direction. To make it even more understandable, going from PCIe Gen 2 to Gen 3 doubles the bandwidth available to the add-on cards installed, from 500MB/s per lane to 1GB/s per lane. PCIe Gen 3 - ZeroCore Power - Eyefinity PCIe Gen 3Īll cards in the entire AMD Radeon R7 to R9 range are PCI Express Gen 3 compatible which provides a 2x faster transfer rate than the previous generation, this delivers capabilities for next generation extreme gaming solutions. So opposed to the current PCI Express slots which are at Gen 2, the PCI Express Gen 3 will have twice the available bandwidth and that is 32GB/s, improved efficiency and compatibility and as such it will offer better performance for current and next gen PCI Express cards.
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