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

[Lsdmeasap]

You may or may not need to. What is your ram running at, and what is the spec for the ram?

[kantona]

@lsdmeasap, since we started discussing my memory I think it's more appropriate to continue here.
I am attaching an Everest test screen shot. Any ideas?
I seem to have the same memory as Merman, Corsair XMS2 2x1GB CM2x1024-6400C4.

[Lsdmeasap]

What is your issues with your memory?

[kantona]

@lsdmeasap, in the few days you were "away" I was reading around and trying things.
Please see my thread for the latest changes I've done: How to setup my RAM timings and maybe OC my CPU???
The basic thing is that the 6400C4 memory was working as 5-5-5-18 by default at 1.95V (it should at 1.8V don't know why, voltage set at Auto).
I also noticed that the memory is working at 357MHz instead of the 400MHz because the AMD cpus use a divider, in my case for my Athlon 4850e it's CPU/7 and the 2.5GHz cpu was giving 357MHz memory freq. I also read about that and OCed my cpu to 2750MHz (x11 ratio with 250MHz fsb, left the HT at 1GHz by setting x4 multi instead of the default x5) and by actually using DDR 667 for the memory that allowed me the divider to be CPU/7 again giving me 393MHz mem freq.
After this the memory itself has changed to 5-5-5-15 also at 1.95V and at 1T (not 2T as before).
But any attempt of mine to set it manually to 4-4-4-12 upping the voltage to 2.05V (closest I can get to manufacturer 2.1V without going over it) is not stable.
Please take a look at the thread and reply to it. Thanks in advance.

[Lsdmeasap]

Aight, I will quote this and reply there

[TheSpeedy]

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]

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]

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]

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]

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.