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Raspberry Pi - the $25 credit-card sized computer - features an advanced graphics core that outperforms the GPU in iPhone 4S by a factor of two to one "across a range of content", according to claims made by the manufacturer. Discussing the graphical potential of the Broadcom BCM2835 chipset at the heart of the device, executive director Eben Upton describes how it compares to the graphics capabilities of the most popular mobile devices. "I was on the team that designed the graphics core, so I'm a little biased here, but I genuinely believe we have the best mobile GPU team in the world at Broadcom in Cambridge," Upton says, when asked to confirm rumours that Raspberry Pi comprehensively outperforms NVIDIA's Tegra 2. "What's really striking is how badly Tegra 2 performs relative even to simple APs using licensed Imagination Technologies (TI and Apple) or ARM Mali (Samsung) graphics. To summarise, BCM2835 has a tile mode architecture - so it kills immediate-mode devices like Tegra on fill-rate - and we've chosen to configure it with a very large amount of shader performance, so it does very well on compute-intensive benchmarks, and should double iPhone 4S performance across a range of content." Broadcom's approach with the BCM2385 chip is somewhat different in other respects though - while its graphics core is state-of-the-art, its main CPU is a single core 700MHz ARM11: somewhat off the pace compared to high-end mobile devices, but still extremely powerful for a $25 <b>...</b> |
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| Time: 02:36 | More in Science & Technology |
Raspberry Pi GPU – 2 X iPhone 4S [HD]
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