Overclocking memories

[Taxus]

Hey there!
Im new in overclocking but im doing well so far, im running my XP 2400 @ 166 x 13.5 stable
I want to run fsb @ 200 Mhz but i have Kingston memories (they suck, dont they?) PC2700(333Mhz). Im trying to get the memories to run @ 200 Mhz but i.. dont know how!
Currently their timmings are 7-3-3-2.5T
What timming do u advise me to use with fsb 166? Are these values ok or can i tweak them a little?
What about running them @ 200 Mhz, what timmings should i use, and i need to up vdimm at leas 0.1V, right?

I know that its a risk to do experiences in O/C without knowing what we're doing, but i tried to use 6-2-2-2 and the system didnt post

Tkx in advance

EDIT: I forgot to mention, im still trying to get some money, so right know im only using one stick of 512 ddr

 

[dunkster]

Try 2/3/3/7 latencies, to see if you can run CAS2.

Here's one method to test your memory limits:
Set multiplier to 5X, so neither CPU nor NB/board are stressed while you're testing memory limits.
Start at a known-stable FSB setting.
Set timing to tightest known-stable memory latency setting.
Run Memtest86 Test#5, two passes, to see if Test#5 runs error-free.

Increment FSB, increasing Vcore if ncessary for stability.
Repeat Memtest 86 Test#5, two passes.
Repeat sequence until Memtest Test#5 will not run error-free, regardless of Vdimm adjustment. This is your memory speed limit for the memory latencies used.
Relax memory latencies and repeat - until no adjustment of either memory latencies or Vdimm results in error-free operation with Test#5.

When finished, you'll know exactly what your memory limits are and what combinations of memory latencies and speeds produce stable memory operation. Take notes for later reference.

To speed up testing, use Memtest86 Test#5 only, since it is usually the most critical test and it finishes quickly.

Hope this helps!

 

[Taxus]

Originally posted by: dunkster
Try 2/3/3/7 latencies, to see if you can run CAS2.

Here's one method to test your memory limits:
Set multiplier to 5X, so neither CPU nor NB/board are stressed while you're testing memory limits.
Start at a known-stable FSB setting.
Set timing to tightest known-stable memory latency setting.
Run Memtest86 Test#5, two passes, to see if Test#5 runs error-free.

Increment FSB, increasing Vcore if ncessary for stability.
Repeat Memtest 86 Test#5, two passes.
Repeat sequence until Memtest Test#5 will not run error-free, regardless of Vdimm adjustment. This is your memory speed limit for the memory latencies used.
Relax memory latencies and repeat - until no adjustment of either memory latencies or Vdimm results in error-free operation with Test#5.

When finished, you'll know exactly what your memory limits are and what combinations of memory latencies and speeds produce stable memory operation. Take notes for later reference.

To speed up testing, use Memtest86 Test#5 only, since it is usually the most critical test and it finishes quickly.

Hope this helps!

Ive done what u said...
Started with fsb @ 166 , multiplier 6.5x
The default settings for my memories is 7-3-3-2.5

First question, sometimes the values for the memories timmings appera in another order, right? Ive seen people saying they use 2-3-3-6...

I tried to lower the timmings but all i got without errors was 6-3-2-2, and i had to raise vdimm to 2,7V.
Is this any good?
With this values i started to increase fsb, it went up to 195 Mhz without errors, i tried to use 7-3-3-2 but i had errors..
So i raised vdimm to 2.8V, lowered the timmings to 6-3-2-2 again and all went fine.
I raised FSB to 200 Mhz and the memories passed the test.
Dont know how much can i still raise fsb but im not worried with that right now.

So, right now im running FSB 200Mhz, Multiplier 10x (ill raise this after i write this post), memories 200mhz 6-3-2-2 @ 1.8V
Are the timmings any good?
Is 2.8V too much for the memories? I know some people use them @ 2,9 but i have no cooling for the memories, do i need it?

Tkx

 

[dunkster]

Usually memory timings/latencies are listed in order as CAS(Tcl), Trp, Trcd and Tras.

Vdimm is like Vcore - use only what you need for stability, since any more just creates excess heat.

Memory in sig system runs 2/2/2/5 timings to 220MHz @ 2.77Vdimm.
Increasing Vdimm to 2.9V allows 2/2/2/5 timings to 222MHz.
2.9Vcore is my system max, so I must relax timings to 2.5/2/2/7 at higher memory frequencies.

I have no idea what is maximum 'safe' voltage for your memory. My memory has no heatsinks, and I run it at 2.9V. If you're concerned, you could rig a fan to focus air-flow over your memory.

Hope this helps!

 

[Taxus]

Tkx a lot for all your answers...
Ill keep doing some experiences...

 

[DerwenArtos12]

10x200 is great for a 2400 so be happy there. now you need to focus just on the ram. i woud sugest taking your cas 2.5 to 2 you will probably need to up the vdimm but not much(hopefully). then work on the 7. 6 would be great! fi you can do that you will have great performance. if that doesn't work then just forget about it. the perfomance diffeence will be minimal between the 6&7. you should work on the cas 2,5 to get it to 2 though. and a case fan blowing right on the ram is a great ideo whether you have heatspreaders or not.

 

[Taxus]

you should work on the cas 2,5 to get it to 2 though

I may be wrong... but i think i did that without any problem! Right know im using 2-3-2-6 (or 2-2-3-6, dont know what comes first) at 166 mhz with the default vdimm.