I want to oc soon

[bigKr33]

My rig is in my sig, its running at 2.2 stock, and i was thinking of overclocking somewhere around 2.4 or something. I was wondering, how should i do it; should i add 3mhz to the fsb run a benchmark to test stability, then go back into the bios put up another 3-5mhz and run a test again. The computer is only like a week old, and the artic silver5 isn't breaking in yet or something because its idle temp is 38-40C under the bios. I built it my self so maybe thats why, lol. Any advice would be fine.

Another question for oc'n:
My ram is capable of ddr600@ 2.5-4-4-7, its ddr400 standard 1.5-2-2-5, which its currently running at. I want to get it to ddr600 if possible. Under the bios in the genie section though, theres only an option for ddr400 and lower, and thats part of the reason why i'm a little confused.

 

[GuitarDaddy]

The DDR settings are memory dividers, they work as follows

DDR400 (also known as 1:1) this runs your ram at the same speed as FSB x 2 200mhz x 2 = DDR400. So if you increase your FSB to 250mhz your ram is running DDR500, if your FSB is 300mhz your ram is running DDR600

DDR333 (6:5) this runs your ram at aprox. 5/6 of FSB, in this case is your FSB is 300 your ram will be aprox. 250mhz DDR500

DDR266 (3:2)
DDR200 (2:1)
etc...


I also have the 3700+ its an overclocking monster, mine will do over 2.7ghz without increasing the volts, and 2.8ghz with 1.55v cpu volts.

If you want to hit DDR600 I would set the mem timings to 3-4-4-10 to start with (you can work back to 2.5-4-4-7 later), and up the DDR volts to whatever is recommended for these sticks to reach 300mhz? Not familar with that ram.

Set memory to DDR400
Set the HTT multi to 3x
Set the CPU multi to 9x
Set the HTT(FSB) to 300mhz

If your 3700+ is like mine it will boot right up at these settings without increasing the vcore, if not up the CPU volts to 1.55 and try again. (then work backwards to find the lowest volts that will work at this speed)
Run Prime95 torture test or S&M for several hours to test for stability

Presto magico, your running 2.7ghz with ram at DDR600

If you really only want 2.4ghz just change the CPU multi to 8x, this will keep your ram at DDR600

 

[phaxmohdem]

I.d up the voltage to the flux capacitor to 1.22 gigawatts

Then read this thread http://forums.anandtech.com/messageview.aspx?catid=28&threadid=1497607

 

[GuitarDaddy]

1.22 gigawatts!!!! 1.22 GIGAWATTS!!! thats imposible

 

[DaNorthface]

lightning baby

 

[potato28]

Thnx to alll! I had a problem with the RAM dividers, but know uve just answered n00bs questions!

 

[bigKr33]

Originally posted by: GuitarDaddy
The DDR settings are memory dividers, they work as follows

DDR400 (also known as 1:1) this runs your ram at the same speed as FSB x 2 200mhz x 2 = DDR400. So if you increase your FSB to 250mhz your ram is running DDR500, if your FSB is 300mhz your ram is running DDR600

DDR333 (6:5) this runs your ram at aprox. 5/6 of FSB, in this case is your FSB is 300 your ram will be aprox. 250mhz DDR500

DDR266 (3:2)
DDR200 (2:1)
etc...

Really good response, but for a dfi board you don't have fsb for just the ram, I can only change fsb for the cpu, or is it the same thing really

I also have the 3700+ its an overclocking monster, mine will do over 2.7ghz without increasing the volts, and 2.8ghz with 1.55v cpu volts.

If you want to hit DDR600 I would set the mem timings to 3-4-4-10 to start with (you can work back to 2.5-4-4-7 later), and up the DDR volts to whatever is recommended for these sticks to reach 300mhz? Not familar with that ram.

Set memory to DDR400
Set the HTT multi to 3x
Set the CPU multi to 9x
Set the HTT(FSB) to 300mhz

If your 3700+ is like mine it will boot right up at these settings without increasing the vcore, if not up the CPU volts to 1.55 and try again. (then work backwards to find the lowest volts that will work at this speed)
Run Prime95 torture test or S&M for several hours to test for stability

Presto magico, your running 2.7ghz with ram at DDR600

If you really only want 2.4ghz just change the CPU multi to 8x, this will keep your ram at DDR600

 

[bigKr33]

Sorry i quoted, but i forgot to type, lol. I still am a little fuzzy with all this. under the bios theres only a fsb adjustment for the cpu and not the ram. And also why should you keep a low LDT/fsb ratio. I'm a total newb at this stuff. And also judging by what you posted, are you saying you can just jump a cpu by 25-50mhz on the fsb? I thought they recommend to go up in small increments.

 

[GuitarDaddy]

The ram doesn't have a seperate bus, it runs off the CPU bus. If you use the DDR400 setting FSB and ram speed are the same, if you use a lower setting your ram speed will be a percentage(ratio) of the FSB speed.

The LDT(Lightning Data Tranfer) bus also refered to as Hypertransport bus also runs off the FSB speed and is calculated at stock 200mhz x 5 (HTmulti) = 1000. This bus has almost no effect on performance if you go over or under 1000, but if it gets much over 1000 you system will become unstable. So as you increase FSB you need to lower the HTmulti to keep the total under 1000. 4x is good up to FSB 250mhz, over that you need to use 3x. In the 2.7ghz example I gave it would be 300mhz x 3x = 900

And yes the best way to learn overclocking, and to learn your equipment is to change variables in small increments and test for stability along the way. And as the guide linked above suggests you should isolate the three main overclocking variables CPU,ram,HTT(FSB) and test for the maximum for each.

I was just giving you a short cut because I've tested the 3700+ extensively and compared with many others and I know what these chips will do. The only part I'm not as sure about is the ram running DDR600, because I've never had any highspeed ram to play with, so I'm not sure of the volts and settings to best achieve 300mhz with your ram. And the additional stress on the CPU's onboard memory controller to run 300mhz ram speed may require more cpu volts and/or reducing the overclock


The difference between increasing your FSB in small increments and just jumping to a high setting is. If uping the FSB in small steps instability will show up in stress testing as errors well before your system becomes to unstable to run. If you jump to a high setting that is too unstable you system will refuse to boot, or crash while loading windows and you have to go back into bios and lower the settings. But once you find your highest stable settings you can boot straight up to them with no ramp up required

 

[bigKr33]

WOW man thank you for the info. You explained it really well. I will experiment as soon my computer breaks in a little longer, and until i feel more confident. Thank you all very much!!