TechNow: Quallcomm unveils the mobile 8/6 core 64bit chipsets

Keeping up with competing chipset’s features like Apple’s 64bit and Samsung and MediaTek’s octa-core and hexa-core processors, Qualcomm unveiled a duo chipsets, that combine 64bit and octa-core / hexa-core computing. The Snapdragon 810 and 808 both bring improvements in processor performance, 3D rendering and LTE.

Both have 64-bit processors and use ARM Cortex A5x CPU cores instead of Qualcomm-designed Kraits. They leverage the big.LITTLE architecture, similar to the Samsung Exynos quad and hexa-core chipsets.

Note that these aren't the first 64-bit chipsets by Qualcomm; the first was the Snapdragon 410, followed by 610 and 615.

Snapdragon 810

 

The Snapdragon 810 replaces the 805 as their flagship chipset, featuring four Cortex-A57 and four Cortex-A53 processor cores. Those are the Cortex-A15 and A7 replacements respectively, but the A57 should offer a 25-55% increase in performance at the cost of just 20% increase in power consumption. And the power consumption will probably actually be even as the 20% difference will be offset by the use of a 20nm manufacturing process, instead of 28nm.

For graphics, the Snapdragon 810 has a brand new Adreno 430, which is advertised as 30% faster than the Adreno 420, which in turn is 40% faster than the Adreno 330 found in current Snapdragon 800/801 chipsets. The end result is something like an 80% performance increase over the current generation.

This chipset also has a hardware H265/HEVC encoder. The ISP uses 14-bit image processing, both of which can have tangible effects on camera image quality.

The 810 has a 64-bit bus to LPDDR-1600 RAM, that's 3,200MHz data rate and 25.6GB/s bandwidth.

Snapdragon 808

Just like the 810, this one also sports a Cortex A57/A53 combo but is a hexa-core processor – two Cortex-A57 cores and four Cortex-A53 cores. Given the performance benefits of the new cores, the 808 chipset should be about as good as the current quad-A15 designs.

The Snapdragon 808 uses a new GPU too, Adreno 418. It sits below the Adreno 420 found in the Snapdragon 805, with 30% better performance than the Adreno 330 (Snapdragon 800). This chipset has a 64-bit memory bus to LPDDR3-933 RAM, that's 1,866MHz data rate and 15GB/s bandwidth. The chipset has an ISP that can decode H265/HEVC but not encode it.

The way the two new chipsets work is that the CPU cores are divided into two groups. All cores can work at the same time, but cores in a group must use the same frequency (the two groups can use different clocks though). This differs from the Krait designs where the clock speed of each core can be set individually. Both chipsets should be available in H1 2015.

4G-LTE and cellular connectivity 

The two new chipset feature 4G LTE Cat. 6 modems, which offer whopping maximum download speeds of 300MBps. To do that it bonds up to three 20MHz data pipes, compared to Cat. 4 modems that use a single 20MHz channel. This, of course, relies on the carriers having enough available bandwidth. If there are not enough 20MHz channels, the modems can use 20MHz + 5MHz + 5MHz to boost the speed.

Source