Introducción
Esta guía contiene una selección de fotos y un resumen de identificación de chips para la placa principal del Steam Deck de Valve. Consulta nuestro Desmontaje de Steam Deck para más información.
Gracias al miembro de la comunidad CChin por su contribución.
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Identificación de CI, Pt. 1:
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AMD/Valve 100-000000405 Procesador de aplicaciones de cuatro núcleos con GPU
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Micron MT62F1G32D4DR-031 WT:B 4 GB de memoria SDRAM LPDDR5
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Memoria Winbond W25Q128JW 16 MB Serial NOR FLASH
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Analogix ANX7580 Receptor DisplayPort a MIPI simple
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Amplificador de audio Cirrus Logic CS35L41B
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Maxim Integrated MAX77961 Cargador de batería de iones de litio USB tipo C
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O2Micro OZ536 Controlador de LEDs de retroiluminación
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Identificación de CI, Pt. 2:
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Controlador digital de 6 fases MP2845 de Monolithic Power Systems
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Monolithic Power Systems MP86902B Etapa de potencia de 35 A
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Monolithic Power Systems MP86903C Etapa de potencia
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Probablemente Monolithic Power Systems NB688C Convertidor Buck Síncrono
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Monolithic Power Systems NB691 Convertidor Buck Síncrono
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Monolithic Power Systems NB690G Convertidor Buck Síncrono
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Posiblemente Monolithic Power Systems NB591 Convertidor Buck Síncrono
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Identificación del CI:
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Controlador integrado ITE Tech IT5570VG (probable)
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Controlador del lector de tarjetas O2Micro OZ711
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Controlador de entrega de energía USB tipo C y USB de Maxim Integrated MAX77958
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Convertidor Buck sincrónico NB691 de Monolithic Power Systems
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Posiblemente Monolithic Power Systems NB591 Convertidor Síncrono Buck
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Diodes Incorporated PI3USB102 Interruptor analógico SPDT USB 2.0
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Texas Instruments TPS22976 Interruptor de carga
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21 comentarios
Interesting how Valve went with a full-custom APU from AMD. I thought they’d use an off-the-shelf chip like the 4500U.
Yeah i know what you mean!
They most likely they where wanting it to not be that thick,
so not like a laptop or desktop CPU for it,
Due to it being kinda thick!
I assume the only major difference between this and an off the shelf APU is that this APU just has everything the steam deck does not utilize disabled or removed for power consumption reasons. I doubt it goes much deeper than that.
Alyx -
Good Point
See what you mean
The 4500u has 6 EC Vega GPU, while the Steameck APU has an 8 ECU RDNA 2 GPU. Plus the custom APU gives them more control than a OTS apu.
I doubt it goes much deeper than that
There are actually some differences, it has many differences than typical off-the-shelf APUs, now I don't know how much is firmware and how much is actually silicon but they had a section with AMD engineers that go into detail, some of my takeaways is that inbetween cycles, if it's done doing what it was it goes into a very low power mode, and the other one being that they really went for consistency and not turbo clocks and stuff
Scribble -
On step 3 there are 3 chips marked with dark blue which should be a USB switch, they look like they might be the TPS2276 load switch. The package does not match with the package from the USB switch datasheet in any case.
CazH -
There’s not much to disable.
And it’s probably not custom APU for them, but something that Dell haven;t bought.
They needed to go to this strange mix of zen2+radeon6xxx mix, because only zen2 was low-power then and starting from radeon 6xxxx it provides RayTracing and is more energy efficient then older chips.
Mobile zen3 wasn’t released then. Now they would go this route.
Microsoft, not Dell. Rumour has it that this was a part originally designed for an MS mobile device that the pandemic killed off: hence the presence of a machine vision IP block on the die that the Deck doesn't use and is most unlikely ever to.