Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

[TheSpeedy]

Re: Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

Can you Help me..
I've got q6600(box), MSI P35 Platinum Combo , Kingston KVR1333D3N9/2G RAM 2x2(dual channel), and I want to ask you on default (AUTO) my ram works as 1066 on 7-7-7-20, but regulary should works on 9-9-9-24 with 1333 MHz . Please tell me how to set up with or without changing the FSB or the divider..soo I can get the full potential of my ram and what's best..
tnx to all

[Lsdmeasap]

Re: Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

You will HAVE to run a FSB of at least 333 to run your ram at 1333Mhz, you can then use either 4.00A or 4.00B for 1333Mhz (333x4=1333)

You will also have to set your ram voltage of course

[demonsavatar]

Re: Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

On my i7/UD4P I have noticed Memtest is not a good indicator of stability at all. A number of configurations I have found can run all night in Memtest but fail in the first 5 minutes of a Prime95 blend torture test. :(

Also, any chance you can update this for the EX58 chips/DDR3, LSDMEASAP?

Some things I've gathered from your postings:

tFAW ~ 30-32
tRC = tRAS + tRP
tWTP = tWR + tWL + 4
Command Rate = 2N for more stability (made Prime95 run for 3 hours longer than with the 1N setting before finding an error for me...still messing with voltages and stuff though to get completely error free)

[Lsdmeasap]

Re: Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

Memtest86+ is a fine indicator of Memory stability only, if you are failing Prime but passing memtest then you likely have other issues such as voltages (CPU or QPI/Vtt or NB) too low or something along those lines

Yes, when I get some time (No Clue When) I will try to update this with some more relevant info for X58. Here is some more to add to your list >>

tWTR = Write to Read (Same Rank) - tWL + 4
tWL = Cas Latency - 1

[morph]

Re: Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

How do these look?
I haven't been able to run a tRD of under 8 since I am using 400+ FSB. Any other timings that have to be loosen to achieve that? Or is it because of the FSB? I am now running 2.40B strap. While I was at 333MHz I could do tRD of 6 with memory@1066MHz using 3.20B strap.

[Lsdmeasap]

Re: Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

Ya, it is the FSB Speed that is limiting the tRD

[morph]

Re: Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

Oh well, I'll just have to use this settings then. Anyway, I'm pretty happy with my A-DATA doing all this with 1.94V.

[Lsdmeasap]

Re: Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

Ya, that is pretty good for A-Data. Is it rated to 2.1V or not? If so you may be able to push things, but of course that is all up to you and your thoughts about warranties

[morph]

Re: Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

Yeah, it's 2.1V but I've never pushed it over 2.0V. It's pretty hot when testing @2V. Maybe when (if) I'll change my MB for a UD3P (and also change my 6-7 years old case) I'll try to go higher freq (or lower timings). Until then there's no point of trying.

[mudkip]

Re: Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

Maby a tutorial for X58 + DDR3 would be nice

[Capt Proton]

Re: Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

If all memory settings are made manually, there would be no difference setting 2B or 2C, would there?

[Lsdmeasap]

Re: Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

If all memory settings are made manually, there would be no difference setting 2B or 2C, would there?

Yes, and no. There is a big difference between the NB timings using C and B

But to answer you directly, no as there is no 2.00C setting, so are you confused about something? I can help if you are, let me know.

Here are the straps and their associated memory multipliers >>

[Capt Proton]

Re: Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

Sorry, a typo. I meant 2D. So, you are telling me that the strap affects more than just the memory timings. To be clear, I am saying that all memory settings are done manually, and there is no change to the FSB. The only change would be selecting 2B instead of 2D.

[Lsdmeasap]

Re: Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

Ahh, ok. Yes, the strap changes the northbridge internal Speeds and timings not the memory timings.

There is a difference but the amount depends on what all your other settings are. Here is some quick tests I did on just this type of thing for a user a week or so ago. >>>

http://forums.tweaktown.com/f58/2-00b-vs-2-00d-399-500-fsb-simple-strap-comparision-31656/

[willykatie]

Re: Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

Great explain about timings. Thanks :)

Just wondering, will it be the same for DDR3?