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a question on ram settings?
http://www.wsgf.org/phpBB3/viewtopic.php?f=72&t=22706		 Page 1 of 1
Author:  andsview [ 15 Sep 2011, 23:57 ]
Post subject:  a question on ram settings?
Hi folks, I'm new to the area of bios's, but it looks like I will have to access this to change settings for my ram.

mobo - Aw9d-max ABIT.

I currently have 2 x 1GB, Ballistix 240-pin DIMM, DDR2 PC2-8500 tracers working fine, but wish to add another Crucial Ballistix Tracer (LED) 2x1GB DDR2 / 800MHz .

This is what was provided to me by the seller :


Memory Module Properties
Module Name Crucial
Serial Number 7D13C65Ah (1522930557)
Module Size 1 GB (2 ranks, 4 banks)
Module Type Unbuffered DIMM
Memory Type DDR2 SDRAM
Memory Speed DDR2-800 (400 MHz)
Module Width 64 bit
Module Voltage SSTL 1.8
Error Detection Method None
Refresh Rate Reduced (7.8 us), Self-Refresh

Memory Timings
@ 400 MHz 5-5-5-18 (CL-RCD-RP-RAS) / 23-42-3-6-3-3 (RC-RFC-RRD-WR-WTR-RTP)
@ 333 MHz 4-5-5-15 (CL-RCD-RP-RAS) / 20-35-3-5-3-3 (RC-RFC-RRD-WR-WTR-RTP)

Enhanced Performance Profile
Profile Name High Performance
Optimal Performance Profile Yes
Memory Speed DDR2-800 (400 MHz)
Voltage 2.2 V
Memory Timings 4-4-4-12 (CL-RCD-RP-RAS)
Row Cycle Time (tRC) 24T
Command Rate (CR) 2T
Write Recovery Time (tWR) 6T

Enhanced Performance Profile
Profile Name High Frequency
Optimal Performance Profile No
Memory Speed DDR2-1000 (500 MHz)
Voltage 2.2 V
Memory Timings 5-5-5-15 (CL-RCD-RP-RAS)
Row Cycle Time (tRC) 30T
Command Rate (CR) 2T
Write Recovery Time (tWR) 8T.

What I would like to know is how to set any settings in the bios for this Ram to work alongside the current 2 x 1gb sticks.
The current ram has timings of : 5-5-5-15, now looking at the above specs for the new ram these settings are in the "High Frequency" band, but I have already tried adding the new sticks and get "C1" on the boards diagnostic display, pointing in the direction that maybe some adjustments need to be made in the bios for this ram to work?

Anyway, this is all new to me, so any advice would be much appreciated.
To start this thread, I have had to remove the new ram, as I pc wasnt going to boot otherwise..

thanks folks .
Author:  Tamlin [ 16 Sep 2011, 00:38 ]
Post subject:  I'm off to bed now, but
I'm off to bed now, but thought I'd chime in. :)

Try to put one of the sets in memory slot 1 and 3, while the other is in slot 2 and 4 (sync dual channel mode). If you need to put in timings manually, try with loose timings like 5-5-5-18 @ 400.
Author:  Gilly [ 16 Sep 2011, 20:27 ]
Post subject:  Tamlin wrote:I'm off to bed
I'm off to bed now, but thought I'd chime in. :)

Try to put one of the sets in memory slot 1 and 3, while the other is in slot 2 and 4 (sync dual channel mode). If you need to put in timings manually, try with loose timings like 5-5-5-18 @ 400.


This!

The memory will only work well (as all 4 connected) if you set each setting to the slowest speed that the sticks support.
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