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[5]: Not impressive
by JAlexoid on Fri 22nd Feb 2013 02:54 UTC in reply to "RE[4]: Not impressive"
JAlexoid
Member since:
2009-05-19

At the highest end GDDR5(200+gbps) is over 10x faster than DDR3 at the highest end(17gbps).

Reply Parent Score: 5

RE[6]: Not impressive
by tylerdurden on Fri 22nd Feb 2013 17:53 in reply to "RE[5]: Not impressive"
tylerdurden Member since:
2009-03-17

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

Edited 2013-02-22 17:59 UTC

Reply Parent Score: 1

RE[7]: Not impressive
by viton on Sat 23rd Feb 2013 12:18 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[7]: Not impressive
by JAlexoid on Sat 23rd Feb 2013 14:51 in reply to "RE[6]: Not impressive"
JAlexoid Member since:
2009-05-19

GDDR5 is rated per chip, while DDR3 is rated per DIMM that has many chips.

DDR3 maxes out at quad-chanel(high end CPU 256bit),
GDDR goes to octa "chanel"(high end GPU's at 512bit).

DDR3 maxes out at 3GHz interface frequency,
GDDR5 goes to 6GHz.

So let's recap:
DDR3 = 3bln * 1sec * 256bit = 768Gbps = 96GBps
GDDR5 = 6bln * 1sec * 512bit = 3072Gbps = 384GBps
GDDR5 = 6bln * 1sec * 256bit = 1536Gbps = 192GBps


But yes, you got me there, I was referring to the common PC3-17000 when I said 17Gbps.

Reply Parent Score: 5