[QUOTE="hexashadow13"][QUOTE="ronvalencia"]I'm pretty sure it means that that using two clocks gives it minimum latency compared to one clock. Not compared to DDR3. So far DDR3 in general always has lower latency than GDDR5. The GDDR5 latency thing is so overplayed, Sony removed the latency with a ring buffer..the memory setup in the PS4 is superior to RAM setup in current PC's (non unified memory for CPU/GPU, etc) Ring buffer...wat? Not entirely understanding what you're saying. Link? I'm confused...http://en.wikipedia.org/wiki/GDDR5
GDDR5 operates with two different clock types. A differential command clock (CK) as a reference for address and command inputs, and a forwarded differential write clock (WCK) as a reference for data reads and writes. Being more precise, the GDDR5 SGRAM uses two write clocks, each of them assigned to two bytes. The WCK runs at twice the CK frequency. Taking a GDDR5 with 5 Gbit/s data rate per pin as an example, the CK clock runs with 1.25 GHz and WCK with 2.5 GHz. The CK and WCK clocks will be aligned during the initialization and training sequence. This alignment allows read and write access with minimum latency.
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