[SI-LIST] 回复： DDR3 from different vendor
- From: John Lee <venussoso@xxxxxxxx>
- To: si-list@xxxxxxxxxxxxx, Gen Huang <ghuang1972@xxxxxxxxx>
- Date: Mon, 7 Mar 2011 12:17:22 +0800 (CST)
Hi, Gen,
There are so many things come to my mind, you need to check: CL/tRCD/tRP etc.
settings, CMD/ADD setup/hold time, DQ/DQS noise, DQ setup/hold time, DQS
setup/hold them, RS/TS-DQS settings, Â tboard, power noise, board stack-up,
DRAM datasheet...
Best Regards!
John Lee
--- 11å¹´3æ??4æ?¥ï¼?å?¨äº?, Gen Huang <ghuang1972@xxxxxxxxx> å??é??ï¼?
å??件人: Gen Huang <ghuang1972@xxxxxxxxx>
主�: [SI-LIST] DDR3 from different vendor
�件人: si-list@xxxxxxxxxxxxx
æ?¥æ??: 2011å¹´3æ??4æ?¥,å?¨äº?,ä¸?å??4:17
I am debugging a DDR3 issue on our boards. We put DDR3-1600 parts from
Samsung, Elpida and Nanya parts on these boards, of course, each board is
installed with the drams from the same vendor. For some reason, only those
boards installed with Samsung parts work stable. Those board installed with
dram from the other two vendors has trouble running at 1600Mbps. These
parts should all be qualified for running DDR3-1600. Does anyone has any
idea what to look at first?
Gen
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