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Politics : Formerly About Advanced Micro Devices -- Ignore unavailable to you. Want to Upgrade?

To: Petz who wrote (77061)	10/26/1999 4:36:00 AM
From: Goutam	Read Replies (2) \| Respond to of 1577836

Petz, re<Why does DDR need twice as many pins? I thought DDR just meant clocking on both edges. How significant is the extra cost of the higher pin count and are there any reliability worries?> I think you misunderstood my previous post. I was comparing the number of I/O pins on a typical RIMM (16, I think) when compared to 64 I/O pins on DDR DIMMs - which is similar to any PC133 SDRAM DIMM. DDR spec calls for clock forwarding scheme to reduce if not eliminate the seriousness of the propagation delay problems associated with the pcboard traces. Regards, Goutama