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AMD’s press release seems to have more detail. Subor is creating both a gaming PC running Win10 and a console with their own OS, presumably Linux-based. The C

by nrp 8y ago

AMD’s press release seems to have more detail. Subor is creating both a gaming PC running Win10 and a console with their own OS, presumably Linux-based. The CPU and GPU are on the same die, while the GDDR5 is on the motherboard through a 256-bit interface. https://community.amd.com/community/gaming/blog/2018/08/03/new-amd-semi-custom-soc-combines-the-power-of-amd-ryzen-cpu-and-amd-vega-gpu-for-gamers-in-china https://community.amd.com/community/gaming/blog/2018/08/03/n...

mjevans 8y ago
Darn, I was hoping Valve had actually done something to make a SteamOS system in China.
- stcredzero 8y ago
  I should think that the Chinese Communist Party would love to maintain a stranglehold over gaming media in China. Making a version of SteamOS and making a success within China would align with how Chinese tech companies have formulated business plans.
  - ngold 8y ago
    If it has any flavor of social media, the party has a mandate to control and monitor it unfortunately.
digi_owl 8y ago
GDDR5 as CPU RAM sounds crazy in the best possible way.
- ErneX 8y ago
  PS4 has this since 2013.
- vardump 8y ago
  Isn't it much higher latency than DDR4?
- xxs 8y ago
  No it doesn't. GDDR5 is bad for CPU as it sacrifices latency for throughput. Cache misses and branch mispredictions become so expensive and in the end it's inefficient.
rbanffy 8y ago
8 gigs is not much for a PC. It'd be cool to have more memory, even if DDR4. I wonder what the Linux kernel would make of multiple kinds of RAM with different performance characteristics.
- wmf 8y ago
  Intel did some work on this for the Xeon Phi that had fast on-package memory and slower main memory. IIRC they use fake NUMA nodes to separate the RAM.
  - toast0 8y ago
    > fake NUMA nodes Is it really fake if the memory access is non-uniform? Maybe it's unconventional?
    - wmf 8y ago
      You got me there. I think conventionally each cpu is a child of one NUMA node so in this case they had to make a NUMA node with no cpus, which isn't quite correct. https://colfaxresearch.com/knl-mcdram/#fig-3 https://colfaxresearch.com/knl-mcdram/#fig-3

by nrp 8y ago

mjevans 8y ago

Darn, I was hoping Valve had actually done something to make a SteamOS system in China.

stcredzero 8y ago
I should think that the Chinese Communist Party would love to maintain a stranglehold over gaming media in China. Making a version of SteamOS and making a success within China would align with how Chinese tech companies have formulated business plans.
- ngold 8y ago
  If it has any flavor of social media, the party has a mandate to control and monitor it unfortunately.

digi_owl 8y ago

GDDR5 as CPU RAM sounds crazy in the best possible way.

ErneX 8y ago
PS4 has this since 2013.
vardump 8y ago
Isn't it much higher latency than DDR4?
xxs 8y ago
No it doesn't. GDDR5 is bad for CPU as it sacrifices latency for throughput. Cache misses and branch mispredictions become so expensive and in the end it's inefficient.

rbanffy 8y ago

8 gigs is not much for a PC. It'd be cool to have more memory, even if DDR4. I wonder what the Linux kernel would make of multiple kinds of RAM with different performance characteristics.

wmf 8y ago
Intel did some work on this for the Xeon Phi that had fast on-package memory and slower main memory. IIRC they use fake NUMA nodes to separate the RAM.
- toast0 8y ago
  > fake NUMA nodes Is it really fake if the memory access is non-uniform? Maybe it's unconventional?
  - wmf 8y ago
    You got me there. I think conventionally each cpu is a child of one NUMA node so in this case they had to make a NUMA node with no cpus, which isn't quite correct. https://colfaxresearch.com/knl-mcdram/#fig-3 https://colfaxresearch.com/knl-mcdram/#fig-3