On Fri, Sep 12, 2014 at 03:21:06PM -0700, ron minnich wrote:
I'm still convinced this is an issue with the code, not the insertion of the DIMMs.
um, actually that is what I was trying to say with those test results.
Are the DIMMs identical w.r.t. timing? Are you always plugging the same DIMMs into the same slots, or did you try swapping them around?
ron
I have swapped them. The failure and the workaround appear to be not affected by swapping the DIMMs. As for the timings I am not sure at all. Maybe you could comment on this from following informations:
From what is written on the DIMMs they possibly could have the same timing, although the chip names are not identical.
DIMM one stickers: ----------------------------------------- RAMAXEL 2GB 2RX8 PC3-8500S-777 HF 100280045 20103563 NK0010090120000032 RMT1970ED48E8F-1066 ----------------------------------------- *11S41R0625ZVJ5DA09XGJ6* SEP/29/2010 FRU 55Y3713 DIMM ----------------------------------------- DIMM one chips: ----------------------------------------- ELPIDA TWN J1108BDBG -DJ-F 1028RR04420 ----------------------------------------- DIMM two stickers: ----------------------------------------- RAMAXEL 2GB 2RX8 PC3-8500S-777 HF 100280045 20102314 NZ0010060530010342 RMT1970ED48E8F-1066 ----------------------------------------- *11S41R0625ZVJ5DA0737DC* FRU: 55Y3713 DIMM ----------------------------------------- DIMM two chips: ----------------------------------------- ELPIDA TWN J1108BDBG -DJ-F 10210R21520 ----------------------------------------- With the DIMMs installed separately MemTest86+ writes for both: RAM: 532 MHz (DDR3-1064) - BCLK: 133 Timings: CAS 7-7-7-20 @ 64-bit Mode Memory SPD Informations Slot 0: 2048 MB DDR3-1066 - Ramaxel RMT1970ED48E8F1066
However, I believe that they are run in Single Channel mode by coreboot. At least that is what it says in the logs. So in conclusion I do not know whether they have identical timings.
with best regards, Mono
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Mono