Linked by Thom Holwerda on Thu 21st Feb 2013 18:18 UTC, submitted by twitterfire
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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
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.





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