The Socket 939 Appreciation Club and Knowledgebase [Official] - Page 61 - Overclock.net

pioneerisloud · 02-27-08

Lol, well I already knew that

. However great information is always given by you

. And yes I agree, the RAM speed has nothing to do with your CPU volts. I was trying to get to that point, but it might've gotten lost somewhere along my post

.

blitz6804 · 02-27-08

I understand all that... I am having a similar problem to Poser. With 2 GB of RAM, I can have them running at 434 MHz or better. With 4 GB of RAM, the most I can have is 393 MHz with CnQ shut off (but Orthos will not run, I think 377 MHz was fastest which it did). With CnQ turned on, and so, CPU voltage dropped to 1.1 V and the multiplier dropped from 11 to 6, RAM will go up to 417 MHz and run without issue. I need to have CnQ on for the monetary savings. I do not game all the time, and so, I hate to waste electricity when I am not. Of course, I could aways overclock to game and then underclock when I am not, but I would rather avoid that if possible.

**txtmstrjoe** · 02-27-08

Quote:

Originally Posted by blitz6804

I understand all that... I am having a similar problem to Poser. With 2 GB of RAM, I can have them running at 434 MHz or better. With 4 GB of RAM, the most I can have is 393 MHz with CnQ shut off (but Orthos will not run, I think 377 MHz was fastest which it did). With CnQ turned on, and so, CPU voltage dropped to 1.1 V and the multiplier dropped from 11 to 6, RAM will go up to 417 MHz and run without issue. I need to have CnQ on for the monetary savings. I do not game all the time, and so, I hate to waste electricity when I am not. Of course, I could aways overclock to game and then underclock when I am not, but I would rather avoid that if possible.

Most S939 systems cannot support 4GBs of RAM whilst OCed. It's an inherent weakness of S939. Most S939s will automatically slow the RAM down to below stock speeds (which is what you're seeing). This will happen whether or not your system is OCed.

As far as CnQ goes, well, you have a choice to make: OC (and run without CnQ), or run stock (with CnQ). I've never been able to set an OC with any real stability with CnQ on. It's a case of oil and water, I'm afraid...

blitz6804 · 02-27-08

I had a stable CnQ overclock. The screen shot I gave you was as such. That is:

When stressed, the CPU ran at 2420 and the RAM ran at 440/2.5-3-3-6-1t.
When idle, the CPU ran at 1100 and the RAM ran at 440/2.5-3-3-6-1t.

Since putting in the second set of DIMMs is where my troubles arise. I would really like to have 4 GB running considering I am going to be installing Vista. When I put in the second pair, it defaults to 333 MHz. I found out that my MoBo only supports an 800 MHz HT, and since I had it running at 1000 MHz, that might have been my instability. I have so much to try when Gigabyte sends me my board. *Pounds fist on desk in impatience.*

POST-EDIT: For those of you curious, that is running XPsp2, but I have a patched code that permits third-party themes.

POST-EDIT2: And txtmstrjoe, my link on the roster is wrong. It should be http://www.overclock.net/amd-general...ml#post3451781.

Poser · 02-27-08

@Lord Vader - I have to disagree with you sir, your vCore (especially in the case blitz and I are encountering) do have a subsequent affect on RAM speed. Bare in mind, that our IMC (intergrated memory controller) are on die...so vCore changes directly effect its ability to facilitate communication between the memory bus and cpu. This is far more significant in the case of running 4 DIMMS as the saturation point is hit at much lower clock speeds and can be increased by a subsequent increase in vCore and HTT voltages.

Also.... I am seeing more and more evidence of 4*1gb being used in 939 systems effectively, but as the result of serious tweakings to discrete timings and voltages. I have yet to achieve success in stabilizing my system, but will continue to post results of my efforts.

@ Pioneer.... benches man, benches. I would love to see the bandwidth implications of your experiments.

@Millhouse... I hate you and your house smells like cat peeeee

@Britney... get a grip girl, your embarrassing yourself

@ Javier, Joel and Ethan... GREATEST HAIRCUT EVER!!!!

**txtmstrjoe** · 02-27-08

@ blitz: I'm can't find the specific post linking me to the correct CPU-Z validation. Please PM with link to the correct one.

And my sincere apologies.

@ Poser: Valid points, as usual, good sir. They certainly make me think about my own analysis of the situation, which is always good and welcome.

(I'm SO not what pioneer still insists on calling me, for sure.)

I will admit that I've not really done any proper testing with 4GBs of RAM on a S939; I don't have that two matching pairs that I can spare for an experiment, sadly. And I don't doubt that some OCers have been able to make the S939 + 4GBs (with the RAM OCed above DDR400) work, as I've seen these reports as well. It's just that they tend to be the exception rather than the rule, and that they are very difficult to achieve. I hope you can make it work, though, and that you can share your findings here.

I shall think and analyze this point further. Maybe someday, I'll even have enough RAM to experiment with, and post my findings here.

Good stuff, everyone!

Poser · 02-27-08

Quote:

Originally Posted by txtmstrjoe

@ Poser: Valid points, as usual, good sir. They certainly make me think about my own analysis of the situation, which is always good and welcome.

(I'm SO not what pioneer still insists on calling me, for sure.)

Thats it... I am using you as a reference for my wife/mother/friends/siblings/employer.... who all beg to differ

rsfkevski · 02-27-08

Hello there Skt 939 users. Does anyone here have a great little 939 CPU for a great price. I have an employee that needs one to put in an Asus A8N SLi Deluxe. Please PM me with what you might have. Preferable dual-core

Thanks!

pioneerisloud · 02-28-08

What kind of benches are you wanting to see? I gave up my hunt for high RAM speeds as I couldn't get them stable for more than a minute. I'm now just going for an undervolted overclock (2.8Ghz)...which I'm wrapping up stability testing now....been going strong for 11 hours.

Poser · 02-28-08

Quote:

Originally Posted by pioneerisloud

What kind of benches are you wanting to see? I gave up my hunt for high RAM speeds as I couldn't get them stable for more than a minute. I'm now just going for an undervolted overclock (2.8Ghz)...which I'm wrapping up stability testing now....been going strong for 11 hours.

I was curious about bandwidth during your RAM experiments. I have seen some crazy undervolts... 2.8 stable @ 1.23

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