Author:
Subject: Mobile
Manufacturer: Xiaomi

The First with the Tegra K1 Processor

Back in May a Chinese company announced what was then the first and only product based on NVIDIA’s Tegra K1 SoC, the Xiaomi Mi Pad 7.9. Since then we have had a couple of other products hit our news wire including Google’s own Project Tango development tablet. But the Xiaomi is the first to actually be released, selling through 50,000 units in four minutes according to some reports. I happened to find one on Aliexpress.com, a Chinese sell-through website, and after a few short days the DHL deliveryman dropped the Tegra K1 powered machine off at my door.

If you are like me, the Xiaomi name was a new one. A privately owned company from Beijing and has become one of China’s largest electronics companies, jumping into the smartphone market in 2011. The Mi Pad marks the company’s first attempt at a tablet device, and the partnership with NVIDIA to be an early seller of the Tegra K1 seems to be making waves.

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The Tegra K1 Processor

The Tegra K1 SoC was first revealed at CES in January of 2014, and with it came a heavy burden of expectation from NVIDIA directly, as well as from investors and the media. The first SoC from the Tegra family to have a GPU built from the ground up by NVIDIA engineers, the Tegra K1 gets its name from the Kepler family of GPUs. It also happens to get the base of its architecture there as well.

The processor of the Tegra K1 look very familiar and include four ARM Cortex-A15 “r3” cores and 2MB of L2 cache with a fifth A15 core used for lower power situations.  This 4+1 design is the same that was introduced with the Tegra 4 processor last year and allows NVIDIA to implement a style of “big.LITTLE” design that is unique.  Some slight modifications to the cores are included with Tegra K1 that improve performance and efficiency, but not by much – the main CPU is very similar to the Tegra 4.

The focus on the Tegra K1 will be on the GPU, now powered by NVIDIA’s Kepler architecture.  The K1 features 192 CUDA cores with a very similar design to a single SMX on today’s GeForce GTX 700-series graphics cards.  This includes OpenGL ES3.0 support but much more importantly, OpenGL 4.4 and DirectX 11 integration.  The ambition of bringing modern, quality PC gaming to mobile devices is going to be closer than you ever thought possible with this product and the demos I have seen running on reference designs are enough to leave your jaw on the floor.

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By far the most impressive part of Tegra K1 is the implementation of a full Kepler SMX onto a chip that will be running well under 2 watts.  While it has been the plan from NVIDIA to merge the primary GPU architectures between mobile and discrete, this choice did not come without some risk.  When the company was building the first Tegra part it basically had to make a hedge on where the world of mobile technology would be in 2015.  NVIDIA might have continued to evolve and change the initial GPU IP that was used in Tegra 1, adding feature support and increasing the required die area to improve overall GPU performance, but instead they opted to position a “merge point” with Kepler in 2014.  The team at NVIDIA saw that they were within reach of the discontinuity point we are seeing today with Tegra K1, but in truth they had to suffer through the first iterations of Tegra GPU designs that they knew were inferior to the design coming with Kepler.

You can read much more on the technical detail of the Tegra K1 SoC by heading over to our launch article that goes into the updated CPU design, as well as giving you all the gore behind the Kepler integration.

By far the most interesting aspect of the Xiaomi Mi Pad 7.9 tablet is the decsion to integrate the Tegra K1 processor. Performance and battery life comparisons with other 7 to 8-in tablets will likely not impact how it sells in China, but the results may mean the world to NVIDIA as they implore other vendors to integrate the SoC.

Continue reading our review of the Xiaomi Mi Pad 7.9 tablet powered by Tegra K1!!

Nvidia's renamed Tegra K1 SoC uses Denver and Kepler

Subject: General Tech | January 6, 2014 - 02:08 PM |
Tagged: tegra k1, tegra, SoC, nvidia, kepler, k1, cortex a15, CES, arm, A15

Project X Logan K1 is the first big news out of CES from NVIDIA and represents a bit of a change from what we were expecting.  The current belief was that the SoC would have four 28nm Cortex A15 processors but that will only be one flavour of K1, a Denver based dual core version will also be released.  Those ARMv8 64-bit processors will natively handle 64 bit applications while the A15 version that The Tech Report had taken pictures of will be limited to 32 bit applications, though that will not matter in many mobile applications.   You should also check out Ryan's deep dive into the new Denver and Kepler version here.

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"In early 2011, during a CES press event, Nvidia revealed its Project Denver CPU initiative. On Sunday evening, at another CES press conference, the company provided a glimpse of the first Denver-based processor: the Tegra K1. This next-generation SoC features dual Denver CPU cores clocked at up to 2.5GHz. The cores were designed by Nvidia, and they're compatible with the 64-bit ARMv8 instruction set. They have a seven-way superscalar pipeline and a hefty 192KB of L1 cache."

Here is some more Tech News from around the web:

Tech Talk

 

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Author:
Subject: Mobile
Manufacturer: NVIDIA

Once known as Logan, now known as K1

NVIDIA has bet big on Tegra.  Since the introduction of the SoC's first iteration, that much was clear.  With the industry push to mobile computing and the decreased importance of the classic PC design, developing and gaining traction with a mobile processor was not only an expansion of the company’s portfolio but a critical shift in the mindset of a graphics giant. 

The problem thus far is that while NVIDIA continues to enjoy success in the markets of workstation and consumer discrete graphics, the Tegra line of silicon-on-chip processors has faltered.  Design wins have been tough to come by. Other companies with feet already firmly planted on this side of the hardware fence continue to innovate and seal deals with customers.  Qualcomm is the dominant player for mobile processors with Samsung, MediaTek, and others all fighting for the same customers NVIDIA needs.  While press conferences and releases have been all smiles and sunshine since day one, the truth is that Tegra hasn’t grown at the rate NVIDIA had hoped.

Solid products based on NVIDIA Tegra processors have been released.  The first Google Nexus 7 used the Tegra 3 processor, and was considered the best Android tablet on the market by most, until it was succeeded by the 2013 iteration of the Nexus 7 this year.  Tegra 4 slipped backwards, though – the NVIDIA SHIELD mobile gaming device was the answer for a company eager to show the market they built compelling and relevant hardware.  It has only partially succeeded in that task.

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With today’s announcement of the Tegra K1, previously known as Logan or Tegra 5, NVIDIA hopes to once again spark a fire under partners and developers, showing them that NVIDIA’s dominance in the graphics fields of the PC has clear benefits to the mobile segment as well.  During a meeting with NVIDIA about Tegra K1, Dan Vivoli, Senior VP of marketing and a 16 year employee, equated the release of the K1 to the original GeForce GPU.  That is a lofty ambition and puts of a lot pressure on the entire Tegra team, not to mention the K1 product itself, to live up to.

Tegra K1 Overview

What we previously knew as Logan or Tegra 5 (and actually it was called Tegra 5 until just a couple of days ago), is now being released as the Tegra K1.  The ‘K’ designation indicated the graphics architecture that powers the SoC, in this case Kepler.  Also, it’s the first one.  So, K1.

The processor of the Tegra K1 look very familiar and include four ARM Cortex-A15 “r3” cores and 2MB of L2 cache with a fifth A15 core used for lower power situations.  This 4+1 design is the same that was introduced with the Tegra 4 processor last year and allows NVIDIA to implement a style of “big.LITTLE” design that is unique.  Some slight modifications to the cores are included with Tegra K1 that improve performance and efficiency, but not by much – the main CPU is very similar to the Tegra 4.

NVIDIA also unveiled late last night that another version of the Tegra K1 that replaces the quad A15 cores with two of the company's custom designs Denver CPU cores.  Project Denver, announced in early 2011, is NVIDIA's attempt at building its own core design based on the ARMv8 64-bit ISA.  This puts this iteration of Tegra K1 on the same level as Apple's A7 and Qualcomm's Krait processors.  When these are finally available in the wild it will be incredibly intriguing to see how well NVIDIA's architects did in the first true CPU design from the GPU giant.

Continue reading about NVIDIA's new Tegra K1 SoC with Kepler-based graphics!

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