Kingston Technology 2x 512MB DDR1 suggested timings

[trodas]

Guys, these lame Kingston Technology two 512MB sticks have bad even the SPD values: 2.5-3-3-8 (at least at 2.5V), but I wonder, if someone can suggest how to push them beyond 229MHz.
Because they did not make the 229MHz even stable. They seems to work:

...but then fail bad

I did not exactly want to reduce the O/C, so I was tweaking as much, as I can and get them at these timings:

To run semi-stable. Good for benches, bad for usage. What shocked me, that for example even 2.90V to them did not improve stability a bit (in fact, things get worser...!!!). So auto (therefore around the 2.5V) seems to work best.

Then I tried relaxing the TRRD, TRWT from 2 to 3, but again things get - worser! WTF!
Then I tried the Async Latency from 7 to 8nS and it get... worser. Unsurprisingly things get worser at 6nS too... But the 8nS was surprising to me. Someone can enlighten me there...?

As the mobo, it is a Asus A8R32-MVP Deluxe (Radeon Xpress 3200) and the Opty can take over 2800MHz at 1.425Vcore, tested, so no problemo there. But the rams do suxx, so...

There are the important bios settigs:



(on the sidenote, when I saw the SPD, then I realized that the TRAS values for 200MHz was 8 and I used 7, as recommended for AMD64 memory controler, so might there I should start...? SPD values for 166MHz are 2-3-3-7, but at 229MHz I'm far from 166MHz...)

Funny fact: relaxing the TRAS to 8 did not help as well. Oh, well...
So as next I trying relaxing the TRC from 7 to 9 and TRFC from 11 to 12, but it still looks bad as WOT suddently quit on me, so...

Ideas need.

And once again this weird behaviour - relaxed timings TRC from 7 to 9 and TRFC from 11 to 12 - give error just sooner...!

WTF if going on there


Tried TRFC relaxing to 13 from 11 and it seems to work more stable:

But it still failed. So I tried TRFC 14 and TRC 8 (as compared to well working TRFC 11 and TRC 7) and it crashed even in YouTube video... so, very bad.

More relaxed timings = worser stability. What it this?! Some sort of sick joke?

 

[Frick]

CAS latency at 3 instead of 2.5? And I think I had some memory that didn't like 1T command rate, but I could be wrong. Reading your posts is like time traveling (it's not a bad thing).

 

[kn00tcn]

put CL on 3, i'm assuming the reference spec for the sticks is supposed to be 200mhz? raising voltage is another idea

i wouldnt dig into those secondary values like you have, not sure all of them mean lower is faster

EDIT: as frick said, commandrate is another value, basically CL & CR are the biggest stability options when talking about how far in mhz a stick can go

 

[FreedomEclipse]

I had a pair of budget pc3200 elixir ram that would hit 500mhz on 3-3-3-8, try that first i suppose

 

[trodas]

Frick - well, it handle CAS 2.5 too well, and I did not like the idea about CAS 3, so I trying to find out what to tweak that CAS 2.5 become rock stable. It is IMHO too much of speed penalty to go to CAS 3 ... but worth to try, sure.


kn00tcn - yes, reference specs are 2.5-3-3-8 for 200MHz, for 166MHz it is 2-3-3-7. As for the secondary timings, I did couple od MaxxMem runs to determine the fastest settings and surprisingly for example the Idle Cycle Limit 16 is fastest, while suggested is 256 as fastest.
Also Queue Bypas Max 4x is faster that 7x, witch is commonly used/recommended.
Also Read/Write Queue Bypas 8x seems to be faster that 16x, so I have it set this way...
As for the voltage, as I write - I get from AUTO to 2.90V and still no help. Still not from semi stable to stable...


FreedomExlipse - amazing rams, where to get rams like that today? LoL

 

[trodas]

Hmmm, seting CAS 3 in MemSet produce instant reboot. That is not good... and detered me from even thinking about trying this setting thru bios, as all other settings seems to be well changable using MemSet, so... it seems to refuse to work with CAS 3. If this is even possible...

 

[FreedomEclipse]

Hmmm, seting CAS 3 in MemSet produce instant reboot. That is not good... and detered me from even thinking about trying this setting thru bios, as all other settings seems to be well changable using MemSet, so... it seems to refuse to work with CAS 3. If this is even possible...

In that case theirs probably a bug with your bios. Ive never heard of an instant restart while loosening timings. You using 1T or 2T?

 

[kn00tcn]

ya that makes no sense, CL3 should work, but also try 2T first

 

[trodas]

Later guys 2T is probably the way to make these poor rams stable at 229MHz, but post finally deliver my the OCZ 2x 1GBy sticks, witch should be better

OCZ4002048ELDCPE-K

I got suggested on HWbot forum, that they have the Infineon BE chips, so they need 2.85V to perform some overclocking. The suggesting user claim that his got these to 266MHz (1T, 1:1):
http://hwbot.org/image/1093595.jpg

At auto, these chips get only 2.50V (as per their SPD values). So I gotta ask - it is safe to try 2.85V to them?