The Nexus 10 Processor
[ame=http://youtu.be/vF0ALmcCiLA]ARM Cortex[/ame]
Two years ago ARM Holdings announced their new architecture that would replace the Cortex-A9 CPU core found in most of todays Android phones and tablets. Codenamed Project Eagle, the new Cortex-A15 CPU was dubbed an Intel killer since it was designed for a wide range of devices, including low-power servers, and boasted speeds up to 2.5 GHz.
Eric Schorn, VP of Processor Marketing ARM, said that A15 is The biggest thing ARM has ever done, the degree of commitment is truly phenomenal. Its like taking a desktop and putting it in your pocket.
As most Android fans know, new phones come out every other week and its a difficult choice knowing when to upgrade your device. However, we only see a new CPU architecture released every 2-3 years. For this very reason, many of us have been waiting to see who releases the first chip with an ARM Cortex-A15 CPU core.
NVIDIA, Samsung, ST Ericsson, Texas Instruments and a few smaller players have all confirmed or hinted at new parts based on Cortex-A15, so its been exciting to watch them compete and see who can come to market first.
Based on all the information we gathered at CES and Mobile World Congress earlier this year, it has become clear that Samsung will be the first company with a chip that includes Cortex-A15. The average consumer doesnt care what processor is inside their phone, but if you do then read on to brush up on the latest details.
Enter the Exynos 5250
Regular readers of the site are probably familiar with Samsungs Exynos 5250. It was first announced last year and processor nerds like me have been obsessed with it ever since.
Back in January we were the first to reveal some of the details about the Exynos 5250 when we interviewed an executive from Samsung LSI at CES. They told us that Exynos 5250 would feature dual-core 2 GHz Cortex-A15 CPUs (that we already knew), but they surprised us with the news that it would feature an ARM Mali-T604 GPU.
Some people doubted our info about the Mali-T604 GPU, but this week Charlie Demerjian of SemiAccurate confirmed the details with a leaked slide from the Common Platform technology forum. There wasnt anything we didnt already know in the slide, but we felt it was a good chance to take a closer look at the Exynos 5250.
Samsungs 32nm HKMG process technology
The ARM Cortex-A15 brings unparalleled performance to our Exynos processor family and the exploding mobile marketplace, said Dojun Rhee, vice president of System LSI marketing, Device Solutions, Samsung Electronics. Designers need an application processor platform that delivers full high definition multimedia capabilities, fast processing speed and high performance graphics to meet end users expectation for a connected life on the go. The advanced low-power, high-performance processor technology of the new Exynos 5250 continues to deliver an unprecedented level of performance for users to enjoy a completely new mobile experience.
So how fast exactly is Cortex-A15? It is capable of processing 14 billion instructions per second (DMIPS, Dhrystone million instructions per second) at 2.0 GHz. Thats almost double the performance over a current Cortex-A9-based dual core processor running at 1.5 GHz, capable of 7,500 DMIPS. It also means it should be faster than Qualcomms new Snapdragon S4 and NVIDIAs Tegra 3.
Memory bandwidth has been increased to a staggering 12.8 Gigabytes per second (GB/s). Once again, that is double the 6.4 GB/s maximum found in current dual-core Cortex-A9 processors.
For even more nerdy details, head over to ARMs official documentation on Cortex-A15.
ARM Mali-T604 GPU core
[ame=http://youtu.be/UL2yXqH4dEg]ARM Mali[/ame]
No consumer devices have used the ARM Mali-T604 GPU, so we dont have a lot to compare it with. However, Samsung says it will offer about a 400% improvement over the current Mali-400 GPU found in the current Galaxy S II models.
Massimiliano Villani, Senior Manager Mobile Marketing for Samsung, said We benchmarked several GPUs and we found that the overall architecture of the Mali family provided by ARM is nowadays the best in class for GPU performance.
One of the main benefits of the faster GPU is the ability to drive super high resolution displays. Exynos 5250 supports resolutions up to WQXGA (2560×1600), which is similar territory to the new iPad retina displays (produced by Samsung).
Exynos 5250 is also equipped with embedded Display Port (eDP) interface, compliant with panel self refresh (PSR) technology. This technology instructs the application processor not to send image data to the LCD panel when the set is displaying still image, reducing power consumption.