SPDTool: Read, Edit and Flash your Memory's SPD

[pancito]

Flashing SPD's on Dimms is not something that should be taken lightly. You can seriously muck up your memory if you are not careful.

Pancito,

Flashing to timings of 4-4-4 would render your dimms unbootable because if you were to clear the CMOS, you can't run 4-4-4 timings with 1.8V, you need 2.0V or higher. The board defaults to 1.8V so you need timings that are looser to allow a boot.
We don't set SPD's loose because we like to, we set them loose for a reason.

Here's my scenario, in my P5W DH at 266FSB i can select memory at 800 with timings at 4.4.4.15, stock right, what i can't change on that board is subtimings, if I check Memset, subtimings tRFC is set to 37 and tRD is set at 6, when i up the FSB to 400mhz and run the memory at 800Mhz i can't run with manual memory timings, i have to let SPD take over, to loosen the tRFC to 42 and tRD to 7 or 8, that way i can work without a problem, at 5.4.4.18

all could be fix if Asus got an update for BIOS to allow me to change tRD and tRFC. but this is another solution or im peeing outside the pot.

[RyderOCZ]

Here's my scenario, in my P5W DH at 266FSB i can select memory at 800 with timings at 4.4.4.15, stock right, what i can't change on that board is subtimings, if I check Memset, subtimings tRFC is set to 37 and tRD is set at 6, when i up the FSB to 400mhz and run the memory at 800Mhz i can't run with manual memory timings, i have to let SPD take over, to loosen the tRFC to 42 and tRD to 7 or 8, that way i can work without a problem, at 5.4.4.18

all could be fix if Asus got an update for BIOS to allow me to change tRD and tRFC. but this is another solution or im peeing outside the pot.

You can set the timings manually, just don't use 400...set the FSB to like 405, you are overclocking the Chipset greatly when you are at 400, you are not running into a memory issue, you are running into a chipset issue.

This thread is about the SPD tool however, not for troubleshooting.....email me with the link in my sig or head on over to the support forums at the other link in my Sig.

Thanks

[fhpchris]

You can set the timings manually, just don't use 400...set the FSB to like 405, you are overclocking the Chipset greatly when you are at 400, you are not running into a memory issue, you are running into a chipset issue.

This thread is about the SPD tool however, not for troubleshooting.....email me with the link in my sig or head on over to the support forums at the other link in my Sig.

Thanks

Uh, he is on 975, how is setting FSB to 405 EASIER than 400?

On the AW9D MAX I can run TRFC of 21 and tRD of 5 @ 433 FSB ish...

I know the P5W DH is picky about ram though...