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Old 08-17-2008, 01:20 PM
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Default Re: Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

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The recommended settings in this guide. Its basically tWR as when my settings are lower than recommended I don't try going lower. My tWR setting is 6 and going lower hard crashed Vista. By hard crash I mean Vista stopped giving a warning that it stopped so no damage is done.
This is likely only because you are using tRD of 6, which as you see I suggested against for a few reasons. Mostly though because the guide was Meant for "General Getting your board up and running smoothly" and not a full "Tweaking" Guide. Which would be using 6 possibly on some boards depending on the quality and bandwidth of the ram at hand, along with a different set of most other settings being optimal

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Re-reading your reply mentioning the "strap" my BIOS has on the right markings to show which multiplier coincides with which strap. At least that is my uderstanding. ??? Seems I have to take another look at this and fully understand this section of the F8 final bios for the P35-DS3L.

Though for 400MHz memory to run at 960MHz with a 400MHz FSB, its 400*2.4=960MHz. So 400*2=800MHz and stock 333*2.4=800MHz Am I missing something here???
Well there is a internal 333 and 400 Strap for the NB weather it is shown as a Option or not in your Memory Multi choices. And again tRD of 6 with either strap may or may not work at any freq, depending on the other settings

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Sorry I thought my post was clear. The SPD settings were taken from CPU-Z and Everest. See the first paragrph of my last post listing my system. My understanding is these programs are reading the SPD info stored in the memory. In CPU-Z the info is under SPD. In Everest the info is under Motherboard/SPD/Memory timings.

My table of Settings shows BIOS settings for 3 and 3.6GHz, the guide's recommended settings, and the MemSet column showing any different settings than what was set in BIOS. As you explained tWTR and tWR should report a different setting than what was set in BIOS. Though tRTP also shows a small different setting.
Ahh, Ok I see what you mean now, I thought maybe you was saying the "AUTO" or left in the BIOS was what you thought SPD setup was, You can also use the SPD button in Memset (Just incase you didnt see it)

tRTP should be as set in the BIOS, does it always vary for you? If so, that could possibly be part of the factors that make the ram not fully compatible in my book with GA boards. I have often wondered what all those factors are but will likely never know

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The only Auto setting used was the Memory Multiplier. I know that 2.4 was used because it shows the memory frequency in the BIOS and CPU-Z confirmed it though it reports the setting as 5:6. Though the P-35-DS3L did read the memory's SPD very accurately.
Sorry, what I meant to better say was intel P35 Chipsets do not accurately "Use" the SPD info for AUTO settings properly.

And also keep in mind any SPD setting you see is for use at 800MHz speeds. You will have better luck and performance with a tRD of 7 with tighter other timings Vs. tRD of 6 with others being loose

But in the end, it all adds up to the memory's compatibility with the board, Chipset Performance and heat, and the actual Ram quality or bandwidth it provides.

And of course what voltages are being used in the NB and Ram, and at what strap/FSb is being used. I could provide you with a Very indepth reading on Straps if you would like
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