I noticed something interesting in an article about the PowerVR architecture. The PowerVR 6 series has twice as many 16-bit float units than 32-bit float units, while the K1 has only 32-bit units. Now, if you write shaders for PowerVR you will notice that using lowp variables in your shaders makes it go a lot faster. The reason is, of coarse, because lowp (and mediump) use 16-bit floats. But speed isn't the only thing - the 16-bit float units also use less power. So, this power saving ability is simply not available at all on the Tegra K1.
Ed WelchMember Since 08 Jun 2009
Offline Last Active Yesterday, 07:15 PM
- Group Members
- Active Posts 86
- Profile Views 2,932
- Submitted Links 0
- Member Title Member
- Age Age Unknown
- Birthday Birthday Unknown
Ed Welch hasn't added any contacts yet.