Could someone please explain to me how should RAM timing be Adjusted?

[kman79]

I found this:

http://forums.amd.com/lofiversion/index.php/t12017.html

It explained the terms well, no doubt.

Now I need to know what needs to be adjusted to get better timings and stability. I know I just can't be changing values to lower ones and expect it to work. I mean how do i know what needs to be adjusted to what clocks? This is really hard to explain without a visual aide, I hope I'm making sense.

Any help on this is greatly aprpeciated

 

[furballi]

For value RAM, try 2.5-3-3-8-1T or 3-3-3-8-1T

For performance RAM, use 2-2-2-7-1T or 2-3-3-7-1T

Run a benchmark like SuperPi 1M to see which one will yield a faster speed.

 

[kman79]

See, that's what I mean.

for example you said "2.5-3-3-8-1T or 3-3-3-8-1T " Where you said for the first one 2.5 would be the CAS Latency, second one would be Trcd, third one would be Trp and the last one would be TRas. Well what about the rest of the available timings, what do I do with those?

Thanks for helping btw

 

[furballi]

I would not modify the other variables since they do not materially improve system performance. CAS and 1T/2T are the biggies. 2-2-2-6-1T may be fast, but it will also limit the ability to run at high FSB. In general, a bump of 6MHz FSB will often overcome the effect of slower RAM.

 

[uberowo]

Hmm, this is interesting.. Are these any good? http://www.corsairmemory.com/corsair/products/specs/twinx2048-3200c2.pdf

I bought these as they were the only "brand" modules I could find at the time that gave me 2x1gb.. which from what I understand is better then 4x512mb for various reasons completely above my head.

 

[Bona Fide]

You may want to leave the timings at SPD, and just up your FSB. It's case-by-case, but I think that RAM with a higher clock will perform better than RAM with tighter timings, up to a certain point.

 

[kman79]

I received my Crucial Ballistix today, 2X1GB DDR500. It's now OCed to 2750, with RAM timings at 3-3-3-8, which I think is very respectable.

I really think the RAM can do more, cause there are posts on xtremesystems.com, with people hitting 270+ and at 3-3-3-8 also, I just don't know how to get there I can't for the life of me, figure out what to do to get the RAM to OC like that and keep timings that good, I'm wondering if they're messing with the other timings besides the one posted already.

I think i will just bring the timings back to stock and work on the OC of the RAM, I think it's easier to get the higher OC with the stock timings. I'll probably do that when I get home tomorrow.

If anyone else has some insight as to what I can do to the other timings to increase performance please let me know, thanks

 

[rise]

i dunno what kinkd of timings you have available. also not sure where people are seeing all these crucial 1 gig sticks doing 270 3-3-3-8. i've seen one person (nugzo) hit that at xs and thats it. his 290 and even 280 failed windows stability.

same thread, i think vapors 265 went out the window as well in windows. so that leave 1 or 2 people running above 260 with this that i've seen. please link any others you see as i'm curious.

theres supposed to be a cl2.5 pc4000 coming out in a week or so but i can only imagine the $$$ of those.

as far as your timings, i usually load defaults, everything on auto, and boot into windows. run a64 tweaker and jot down the timings you see. back into bios and see what you can change. this may be overkill but it gave me insight into my board alot better-
http://www.dfi-street.com/forum/showthread.php?t=11397

i'm sure you don't have all those timings but you may have some that you can play with. try to keep the cas 3 and maybe try 3-4-3-8 or 3-44-10. when memtesting, keep an eye on your mbs and how it changes with whatever tweaks you made.

 

[kman79]

Thanks, that link helps alot. There's another post in those Forums that someone else linked me that also gavme me some ideas. I'm thinkin now that I should have bought a DFI board......maybe.

I'm only really looking to hit 2.8GHz 1:1. Would be nice if I can get more, but my goal is 2.8GHz. I'll try those timings out tomorrow when I get home from work.

 

[furballi]

Going from 1:1 to 5:6 memory divider will only result in a loss of about 5MHz FSB on the AMD 64 platform. If you can overclock the FSB by more than 6MHz, then you're already ahead of the game. Any decent Value RAM will hit 265MHz FSB.

For example, running 256MHz FSB at 11x multiplier with 5:6 memory divider (213MHz RAM speed) will yield a faster PC than 250MHz FSB at 11x multiplier with 1:1 memory divider (250MHz RAM speed).

 

[kman79]

Originally posted by: furballi
Going from 1:1 to 5:6 memory divider will only result in a loss of about 5MHz FSB on the AMD 64 platform. If you can overclock the FSB by more than 6MHz, then you're already ahead of the game. Any decent Value RAM will hit 265MHz FSB.

For example, running 256MHz FSB at 11x multiplier with 5:6 memory divider (213MHz RAM speed) will yield a faster PC than 250MHz FSB at 11x multiplier with 1:1 memory divider (250MHz RAM speed).

This is mainly a gaming computer. I wish I bookmarked the review, but it showed in great detail that running 1:1 showed a great difference in performance in terms of FPS. One of the comparison was running memory with a 5:6 divider and another at 1:1 and in HL2 there was a considerable difference in FPS.

 

[exar333]

Originally posted by: rise4310
i dunno what kinkd of timings you have available. also not sure where people are seeing all these crucial 1 gig sticks doing 270 3-3-3-8. i've seen one person (nugzo) hit that at xs and thats it. his 290 and even 280 failed windows stability.

same thread, i think vapors 265 went out the window as well in windows. so that leave 1 or 2 people running above 260 with this that i've seen. please link any others you see as i'm curious.

theres supposed to be a cl2.5 pc4000 coming out in a week or so but i can only imagine the $$$ of those.

as far as your timings, i usually load defaults, everything on auto, and boot into windows. run a64 tweaker and jot down the timings you see. back into bios and see what you can change. this may be overkill but it gave me insight into my board alot better-
http://www.dfi-street.com/forum/showthread.php?t=11397

i'm sure you don't have all those timings but you may have some that you can play with. try to keep the cas 3 and maybe try 3-4-3-8 or 3-44-10. when memtesting, keep an eye on your mbs and how it changes with whatever tweaks you made.

?? cl1.5-2 RAM already exists....BH-5