Subject: Graphics Cards, Processors, Mobile | September 29, 2014 - 01:53 AM | Scott Michaud
Tagged: apple, a8, a7, Imagination Technologies, PowerVR
First, Chipworks released a dieshot of the new Apple A8 SoC (stored at archive.org). It is based on the 20nm fabrication process from TSMC, which they allegedly bought the entire capacity for. From there, a bit of a debate arose regarding what each group of transistors represented. All sources claim that it is based around a dual-core CPU, but the GPU is a bit polarizing.
Image Credit: Chipworks via Ars Technica
Most sources, including Chipworks, Ars Technica, Anandtech, and so forth believe that it is a quad-core graphics processor from Imagination Technologies. Specifically, they expect that it is the GX6450 from the PowerVR Series 6XT. This is a narrow upgrade over the G6430 found in the Apple A7 processor, which is in line with the initial benchmarks that we saw (and not in line with the 50% GPU performance increase that Apple claims). For programmability, the GX6450 is equivalent to a DirectX 10-level feature set, unless it was extended by Apple, which I doubt.
Image Source: DailyTech
DailyTech has their own theory, suggesting that it is a GX6650 that is horizontally-aligned. From my observation, their "Cluster 2" and "Cluster 5" do not look identical at all to the other four, so I doubt their claims. I expect that they heard Apple's 50% claims, expected six GPU cores as the rumors originally indicated, and saw cores that were not there.
Which brings us back to the question of, "So what is the 50% increase in performance that Apple claims?" Unless they had a significant increase in clock rate, I still wonder if Apple is claiming that their increase in graphics performance will come from the Metal API even though it is not exclusive to new hardware.
But from everything we saw so far, it is just a handful of percent better.
Subject: General Tech, Shows and Expos | March 19, 2014 - 01:20 PM | Jeremy Hellstrom
Tagged: Imagination Technologies, gdc 14, wizard, ray tracing
The Tech Report visited Imagination Technologies' booth at GDC where they were showing off a new processor, the Wizard GPU. It is based on the PowerVR Series6XT Rogue graphics processor which is specifically designed to accelerate ray tracing performance, a topic we haven't heard much about lately. They describe the performance as capable of processing 300 million rays and 100 million dynamic triangles per second which translates to 7 to 10 rays per pixel at 720p and 30Hz or 3 to 5 rays a pixel at 1080p and 30Hz. That is not bad, though Imagination Technologies estimates movies display at a rate of 16 to 32 rays per pixel so it may be a while before we see a Ray Tracing slider under Advanced Graphics Options.
"When we visited Imagination Technologies at CES, they were showing off some intriguing hardware that augments their GPUs in order to accelerate ray-traced rendering. Ray tracing is a well-known and high-quality form of rendering that relies on the physical simulation of light rays bouncing around in a scene. Although it's been used in movies and in static scene creation, ray tracing has generally been too computationally intensive to be practical for real-time graphics and gaming. However, Imagination Tech is looking to bring ray-tracing to real-time graphics—in the mobile GPU space, no less—with its new family of Wizard GPUs."
Here is some more Tech News from around the web:
- MoOx contacts make p-type transistor @ Nanotechweb
- Surrender your crypto keys or you're off to chokey, says Australia @ The Register
- Win XP holdouts storm eBay and licence brokers, hiss: Give us all your Windows 7 @ The Register
- Ubuntu Now Runs Well On The MacBook Air, Beats OS X In Graphics @ Phoronix
- Hidden 'Windigo' UNIX ZOMBIES are EVERYWHERE @ The Register
- Xbox boss Marc Whitten leaves Microsoft for Sonos as PS4 leads console sales @ The Inquirer
- Big Brother China Censors WeChat... Again @ TechARP
- Ergotech Freedom Quad 1-over-3 Desk Stand Review @ Techgage
- 10 Old Sprint Phones Can Now Get Totally Free Voice, Texts, and Data @ Gizmodo