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post #11 of 21
Thread Starter 
Quote:
Originally Posted by Bluecow003
When you change the FSB speed, that effects the CPU, the HT, and the RAM. They are all tied together. Don't let your HT get above 1000MHz (that HT multiplier x FSB < 1000).

It shouldn't reset the multiplier. Nothing should get reset as long as you use all manual options and DON'T increase the DDR400 to say DDR433 or DDR466. You know that option that has specific choices of DDR333, DDR400, DDR433, DDR466. Just leave that at DDR400. If you increase that option then it resets some other things to auto. However, if you just want to see how high your CPU can run and your memory can't handle it, then you can change that option to either DDR366 or DDR333, that is called the divider on Asus boards. It will lower the frequency of the ram without lowering the CPU frequency. Just change the voltages, the multiplier, the FSB, and your memory timings (just the first 4 timings really). In that Jumper Config. menu where you pretty much change all the voltages and stuff, there really shouldn't be anything in there that is on AUTO.

Make sure you're running memtest once your memory frequency starts getting more than it's factory settings to make sure the memory doesn't have any errors.
Good explaination. However, I am aware of all this. The issue that I brought up originally in the thread was increasing to DDR433 or 466 and not having the voltage/fsb/etc. values default back to auto. I was interested in seeing how fast I could get my memory to run without the CPU in the equation.

I have found that with running a 1:2 divider and a cpu multi of 6, I can get my HTT up to 320 or so before it fails. Also, my cpu seems to not enjoy going over 230-232 when at an 11x multiplier. I think that is an issue with not being able to give it enough voltage with my MB. I have yet to find the upper limit of my memory though. So far it has run fine at 1:1 with 230x11 (i.e. DDR 460 i guess). I was just able to pull off a seemingly stable OC at 232x11, but I had to max the voltage at 1.5v and it got up to the high 50's temperature wise. Looks like I am stuck at 2530Mhz until I get a different mobo and/or pull out the soldering iron and get some water cooling

Thanks for your help though!

-LC
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post #12 of 21
I've been running into this problem as well with my Asus BIOS, can't find anything that would imply it's a divider unless it's just hte frequencies, I noticed a HUGE drop in memory speed when I had it set to auto but changed it back to DDR400 in the DRAM screen. I have some pretty solid memory but I'm jsut curious to know how far I can push it

I'd show you my CPUID CPU-Z pics but my internet is spotty and I'm on cmapus right now so I can't get to it
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post #13 of 21
Lewis...
The LDT voltage (memory controler)... have you upped it any?
Gator...
Some MBs don't have a divider in the BIOS which is in addition to the common option of setting from the Default 400/200, 333/166, 266/133 and 122/200.
    
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post #14 of 21
Thread Starter 
Quote:
Originally Posted by The Duke
Lewis...
The LDT voltage (memory controler)... have you upped it any?
Gator...
Some MBs don't have a divider in the BIOS which is in addition to the common option of setting from the Default 400/200, 333/166, 266/133 and 122/200.

Yep I have. The bios only gives the option of 1.2v and 1.25v. Hasn't really seemed to effect much when I test for stability.

Gator, as The Duke said there is no outright 'divider' setting in that bios. You can drop the 'memclock frequency' setting to apply a divider on the memory vs. the cpu value. If you keep it at the 400 setting (DDR400) then you will notice that as you increase the HTT, the memory speed will also increase 1:1. Just run CPU-Z in Windows and you should see that if you set it to 400, and your HTT to 230 lets say.. then your memory speed should also be at 230.

If you decrease the memory speed, then it will keep it proportionally lower than the HTT speed. Best thing to do is just make some changes and then run CPU-z and look at the CPU and MEMORY tabs and see how they change. I was confused on this too but was able to get ahold of it (i think) by doing this.
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post #15 of 21
as the Asus site says make shure you have the chipset BIOS over v 6.2 (I think) before you flash. Thats a simple task of loading the latest platform drivers from the Nvidia site.That reversion to auto settings thing should be gone by now it was making me crazy last spring around revision 1005'ish.
In general our mobos dont seem to like excessive FSB speeds Ive got my HTT at 2 and am OK at 309 x 9 but have only put it through a few 3DMk6 and aquamark rounds I need to download some serious OC torture tests and run them super pi etc
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post #16 of 21
Thread Starter 
Quote:
Originally Posted by keef007
as the Asus site says make shure you have the chipset BIOS over v 6.2 (I think) before you flash. Thats a simple task of loading the latest platform drivers from the Nvidia site.That reversion to auto settings thing should be gone by now it was making me crazy last spring around revision 1005'ish.
In general our mobos dont seem to like excessive FSB speeds Ive got my HTT at 2 and am OK at 309 x 9 but have only put it through a few 3DMk6 and aquamark rounds I need to download some serious OC torture tests and run them super pi etc
Hmm thats strange. I am at the latest chipset and BIOS versions but it still does that. Are you at BIOS v1011 keef007?
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post #17 of 21
Ive got the Deluxe you've got the Premium and we're on diff BIOS revisions. The good news is that your board (and later revisions of mine for that matter) are better OC's than my early one. I dont have a cure for youre prob but it IS a PIA! I just left the RAM on auto and worked with the FSB and multiplier when I had your problem Thats about all you can do. Sorry dude
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post #18 of 21
Thread Starter 
Quote:
Originally Posted by keef007
Ive got the Deluxe you've got the Premium and we're on diff BIOS revisions. The good news is that your board (and later revisions of mine for that matter) are better OC's than my early one. I dont have a cure for youre prob but it IS a PIA! I just left the RAM on auto and worked with the FSB and multiplier when I had your problem Thats about all you can do. Sorry dude
Yeah, I have noticed most of the people suggesting to update the bios to correct that issue don't have the premium and can go to higher bios versions. Ah well. I don't think my memory speed is an issue right now anyhow. It seems like it is keeping pace no problem with the low OC limits I am able to reach right now. Thanks man!
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post #19 of 21
Quote:
Originally Posted by Lewiscypher
Good explaination. However, I am aware of all this. The issue that I brought up originally in the thread was increasing to DDR433 or 466 and not having the voltage/fsb/etc. values default back to auto. I was interested in seeing how fast I could get my memory to run without the CPU in the equation.

I have found that with running a 1:2 divider and a cpu multi of 6, I can get my HTT up to 320 or so before it fails. Also, my cpu seems to not enjoy going over 230-232 when at an 11x multiplier. I think that is an issue with not being able to give it enough voltage with my MB. I have yet to find the upper limit of my memory though. So far it has run fine at 1:1 with 230x11 (i.e. DDR 460 i guess). I was just able to pull off a seemingly stable OC at 232x11, but I had to max the voltage at 1.5v and it got up to the high 50's temperature wise. Looks like I am stuck at 2530Mhz until I get a different mobo and/or pull out the soldering iron and get some water cooling

Thanks for your help though!

-LC
WoW your confused.
LoL
To test for the max bandwith on your ram. You want to keep the ram at ddr 400 which is a 1:1 divider. Put a small multi on the CPU like 5x or 6x.
And raise the HT until it fails. Then back down a bit and memtest. If it fails back down some more, mem test. Repeat until memtest doenst give errors.

I have this board.
Any questions? Ask me if you dont get any response here.
I recomend tho that you read and reread the guides avaiable on overclocking before you go any further tho.
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post #20 of 21
Quote:
Originally Posted by The Duke
Lewis...
The LDT voltage (memory controler)... have you upped it any?
Gator...
Some MBs don't have a divider in the BIOS which is in addition to the common option of setting from the Default 400/200, 333/166, 266/133 and 122/200.
THe asus a8n-sli premium doesnt have LDT voltage.
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