Linked by Thom Holwerda on Thu 21st Feb 2013 18:18 UTC, submitted by twitterfire
Games Late last night, Sony unveiled the PlayStation 4 - sort of. It's got a custom 8-core AMD x86-64 processor, 8GB of GDDR5 RAM, and a custom Radeon-based graphics chip. It's also got additional chips to offload specific tasks like video (de)compression (livestreaming is built-in!), and there's a large focus on streaming games, but most of it is "an ultimate goal" instead of a definitive feature. It won't play PS3 discs (but will eventually stream many PS3 games), and, while there's some weaselwording involved, second hand games are safe. The biggest surprise? The console itself wasn't shown because it's not done yet. No joke. No price, no release date (other than somewhere before the holidays).
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RE[7]: Not impressive
by viton on Sat 23rd Feb 2013 12:18 UTC in reply to "RE[6]: Not impressive"
viton
Member since:
2005-08-09

Not quite, DDR3 can push over 190 Gbps at the high end (PC3-24000).

So you need a least 176/24*64b = 448bit memory interface with 7 DDR3 modules working in parallel to be on par with PS4. But I'm not sure it will be as effective as GDDR5. Also DDR3 is not a power efficient solution.

Edited 2013-02-23 12:19 UTC

Reply Parent Score: 2

RE[8]: Not impressive
by JAlexoid on Sat 23rd Feb 2013 14:55 in reply to "RE[7]: Not impressive"
JAlexoid Member since:
2009-05-19

192 giga bits per second is a correct value, it's 64bits at 3GHz.
You can't get to 192GBps total system RAM bandwidth using a single non-custom CPU. All max-out at 96GBps.

Reply Parent Score: 2

RE[9]: Not impressive
by viton on Sat 23rd Feb 2013 17:35 in reply to "RE[8]: Not impressive"
viton Member since:
2005-08-09

192 giga bits per second is a correct value, it's 64bits at 3GHz.
192Gb/s is 24GB/s as I stated.

You can't get to 192GBps total system RAM bandwidth using a single non-custom CPU. All max-out at 96GBps.
I don't understand what you're talking about.
PS4 SoC memory bandwidth is 176GB/s

Where did you get this absurd "96GBps" value? Intel Xeon Phi has 352 GB/s bandwidth (with 16 memory channels @ 5.5GT/s)

edit: Oh I see, you mean top DDR3 bandwidth @ quad channel.

Edited 2013-02-23 17:42 UTC

Reply Parent Score: 2