Memory timing options

[Tanclearas]

I'm curious about the memory timing options available on the LP SLI-DR.

The following options can be adjusted in the A8N-SLI Deluxe BIOS (1006):

Where ranges specified, the intermediate steps are 1.

1T/2T -> duh
CAS# latency (Tcl) -> 2.0, 2.5, 3.0
RAS# to CAS# delay (Trcd) -> 2 to 7
Min RAS# active time (Tras) -> 5 to 11
Row precharge Time (Trp) -> 2 to 6
Row Cycle Time (Trc) -> 7 to 13
Row Refresh Cycle Time (Trfc) -> 9 to 15
Write Recovery Time (Twr) -> 2 to 3
Read-to-Write Delay (Trwt) -> 1 to 6

After looking at the DFI manual, it would seem there are more options available.

Row to Row Delay (Trrd)
Write to Read Delay (Twtr)
Refresh Period (Tref)
Write CAS Latency (Twcl)

I'm curious what ranges are available on the DFI for all settings.

 

[JJ650]

Chk out this @ DFI street forums.
There are more options on the DFI board.
DFI Bios memory settings guide

 

[Tanclearas]

Sweet! Thanks!

Now, the reason I was curious about this was that some of the maximum values selectable on the Asus seemed a little low. For example, the maximum value I can select for Trc in the A8N-SLI Deluxe BIOS is 13. Yet, even in the article you point to, they suggest starting the DFI board at 16 (it has a max of 22) and working your way down. They specifically state that if the value is too low, it can cause instability, even "data loss or corruption".

It is a similar case with the Trfc and Trwt settings. The DFI just has a wider range to select from.

Could it be that the 1T issue suffered by the A8N-SLI Deluxe is that some of the values outside of CAS (Tcl), Trcd, Tras, and Trp can not be relaxed enough to permit stability?

Comments?

 

[JJ650]

I'm not sure about the Asus board. I know that the DFI can be VERY picky about the RAM and it's settings. The same could be possible for you.

 

[Tanclearas]

Is there a utility available that allows you to change other memory settings? I know the Nvidia utility lets you adjust the common values, but I'm curious if there is another utility that has more options.

 

[RY62]

Originally posted by: Tanclearas
Is there a utility available that allows you to change other memory settings? I know the Nvidia utility lets you adjust the common values, but I'm curious if there is another utility that has more options.

Check out SysTool http://www.techpowerup.com/systool/ It's still in alpha/beta stage but it's working good with the A8N-SLI Deluxe.

 

[The Sly Syl]

Just what are the latter numbers? (After the typical 2-2-2-5)
Is there any benefit or reason to change them around?

 

[rise]

Originally posted by: The Sly Syl
Just what are the latter numbers? (After the typical 2-2-2-5)
Is there any benefit or reason to change them around?

read the link JJ gave.

OP, i've used a64 tweaker but i'm not sure if its board specific let me look.


here it is about 1/2 way down

 

[The Sly Syl]

I can mess around with them through my BIOS, but, is there any reason too change them?

Any time i've changed them (Rather blindly) It only seems to destablize or actually lower performance of my computer.

According to CPU-Z I'm running at
(from top to bottom)
216
CPU/5 (cause of Cool'n'quiet, its normally CPU/1)
2.0
2
2
5
11
16

 

[Tanclearas]

Originally posted by: rise4310

Originally posted by: The Sly Syl
Just what are the latter numbers? (After the typical 2-2-2-5)
Is there any benefit or reason to change them around?

read the link JJ gave.

OP, i've used a64 tweaker but i'm not sure if its board specific let me look.


here it is about 1/2 way down

Thanks! I'll give it a whirl!

 

[GuitarDaddy]

A64 tweaker works well on the Asus