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Hello, my specs are listed below. I got my new psu which is better than my old one and I finally OCed my gfx card last night. I was wondering if I could get some overclocking suggestions on my system. I'm still fuzzy about the voltage. I've read various guides on here, like the ultimate overclocking guide and I get most of it, but I'm still iffy about the voltage part. Like when to up it and the increments and such. I've seen people request overclock suggestions on here and someone with knowledge spews the info, lol. Like what to set, etc.

I have messed with bumping some stuff up. I've tried 210x11.0 and 230x10.0 with no problems and an increase in benchies. No errors or anything, but I obviously want to get higher. And I'm not sure what to do about the memory part also. For super pi right now, running 1M which I think is the number people test with, I get 36.453 S. I believe I want to try to get around 30 S or below yes?

So yeah, I've wanted to overclock for a while, but I would feel more comfortable with some help from the experts on here.
 

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If you want to find out the best performance you can get out of your system, you are going to have to take it step by step. You are going to need to find the limits of the three major components involved in overclocking, your mb, cpu and ram. If you don't know how to isolate these three parts individually, then you'll run into problems. For example, if we give you some settings for a high overclock, and your ram or cpu (and all cpu's have a 'sweetspot' where they perform the best at a certain voltage) voltages aren't high enough, your comp may not boot at all, which will require you to reset your bios. Also, if your OC isn't stabile, you won't know which component is causing the problem. However if you find out the limits of all three components first, you'll have a fairly good idea of which settings will give you the best performace. That being said, looking at your mb and ram, you should be able to run a 1:1 ratio with your ram and fsb, and they 'should' both max out well higher than your cpu. You should follow the following instructions on how to find the max core speed of your cpu (which involves you finding which voltage it's like to run at that max core speed) and with a little minor tweaking later, you should be right at your best system performance.

Quote:


Originally Posted by Faq

The Process/Theory of OVERCLOCKING!

You should check out this thread to see what kind of overclocks to expect, and what core you have (if you don’t already know).

Overclocking Basics:
CPU Speed = FSB x The Multiplier. Note: that a system clocked at 210 x 10 = 2100mhz will perform better than the same system clocked at 200 x 10.5 = 2100mhz. This is because your FSB affects not only your CPU, but your motherboard, and memory as well. But because you’re also overclocking your motherboard and memory, these components can limit your max FSB. Your motherboard may be able to run at 220mhz FSB, but if your memory can only run at 200mhz, then that’s where you’re FSB overclock is going to have to stop (unless you buy better RAM). It is also possible that your motherboard will stop you before anything else does. When overclocking hardware for the first time, it’s a good idea to find out how fast each component can run individually. Due to concerns w/ the PCI bus, sometimes this can be a bigger challenge for those w/ out a nForceII chipset. If you do not find your max overclock for each component, when you hit a wall, it will be harder to deduce what is holding you back. Here is the general process of overclocking your CPU/mobo/memory. The options you have in your BIOS totally depends on your chipset, motherboard make/model, and sometime your BIOS version. Your options may just be named differently or you may not have them. It’s up to you to learn how to use your BIOS. Use google and/or your manual to figure out how. If you don’t have the options you want... buy a new mobo.

Finding the max FSB for your motherboard:
1) Insure you have good or sufficient cooling for your CPU!

2) Boot into your BIOS settings.

3) Lower your multiplier to a low setting (5-8).

4) Raise your memory timings, and/or change your CPU/memory ratio so that your memory’s FSB is always at/below it’s rated speed. This should insure that your memory won’t be limiting your FSB, just your mobo.

5) Disable useless BIOS features (depends on your mobo, but CPU speed spectrum, throttling are common ones).

6) Increase your mobo’s voltage (vdd) as high as you safely can. Most motherboards don’t allow you to increase your vdd more than is safe (1.6v-1.7v or higher w/ a decent northbridge heatsink). When in doubt search Google.

7) Increase your system FSB to 10-15mhz above it’s rated speed. Always make sure your PCI bus speed isn’t too high before you SAVE and exit your BIOS.

8) Then see if you can boot into your operating system. If your computer boots into your OS, and doesn’t restart, or lock-up, increase the FSB by another 10-15mhz.

9) Continue until your computer reboots unexpectedly, or locks-up. When this happens go back into your BIOS and lower your FSB by maybe 5mhz and try again (if that doesn’t work, lower it some more).

10) If you tried a FSB high enough, you may not be able to get back into your BIOS to lower your settings. In this case, you have to use the jumper located near the battery and CMOS chip of your motherboard. Move the jumper from its current pins, to the only other possible position. Then after about 5 seconds, move it back to it’s original location. If you don’t have one of these jumpers, take out your battery for 1 hour or so and then put it back in. You will now be back at default settings. So you must reset everything to where you were just before you hit trouble.

11) Once you are back into your OS open prime95 (which you have already downloaded and installed from here). Then start the “torture test.†This will test your system for stability. Since we’re only testing out the mobo, once torture test has ran continuously for 4 hours with zero errors/reboots/lock-ups, your FSB is stable. If you get an error or crash, lower your FSB by 1mhz or 2mhz. When running the torture test, check your CPU's temperature. It shouldn’t be above 45C MAX since you lowered your multiplier and is probably running below stock clock speed. As mentioned earlier use a program like MotherBoard Monitor to monitor your uhh... motherboard.

12) You now know and can now write down your motherboard’s max FSB

Finding your memory’s max FSB:
1) Go back into your BIOS.

2) Change your CPU/memory ratio to 1:1 (A.K.A.: 1, 1/1, 3/3. 4/4, 5/5, etc).

3) Increase your memory voltage to the max your willing to run it at (SAFE: 2.7v; MAX: 3.1v).

4) Adjust your memory timings to 2.0-2-2-6 (The last value is up to you. 5-8 should be good, but many nforceII motherboards run better when the last value is 11).

5) First, try your memory’s stock FSB. You should try your stock speed first because 2.0-2-2-x might be lower than your memory’s recommended timings. Then continue to find your memory’s max FSB just like you did w/ the mobo. Now if you work your way back up to your mobo’s max FSB, and your system is stable, then you know your memory can do a higher FSB than your mobo; but you won’t be able to find out what that is with out a higher clocking mobo.

6) The best memory stability testing program is Memtest86. You should unzip the downloaded file to a floppy/CD, then boot to that floppy/CD in order to start the test. Prime95 will also test your memory. Use both if you wish.

7) Now you have found your memory’s max FSB w/ the memory timings 2.0-2-2-x. Test your bandwidth using SiSoftware Sandra’s “Memory Bandwidth Benchmark.†Depending on a lot of factors, you may have better overall performance w/ the timings 2.0-3-3-x. (or higher). You should definitely be able to reach a higher FSB w/ these timings than you did w/ 2.0-2-2-x. So set your memory timings to 2.0-3-3 and test some more! Once you find this max FSB, test your bandwidth again w/ SiSoftware Sandra, and see which settings yielded the higher score. You can continue to test 2.0-3-2-x, 2.0-2-3-x and whatever other timings you want, or settle on using the one you have already found to work the best thus far.

Finding your max CPU clock speed:
Before we continue, I must say that the important thing is to find the best multi and FSB combination, not necessarily the highest CPU clock speed. Though it is nice to know what the max clock speed is for your chip/cooling. The best combo will depending on which program(s) you want your system to run better on. For your final overclock settings you want your FSB and CPU clock speed to be as close to their maximums as possible. A system running at 230mhz x 10 = 2300mhz might perform similar to the same system at 210mhz x 11.5 = 2415mhz. You lost 20mhz FSB but gained 115mhz clock speed. Which one is better depends on whether you’re running a CPU intensive application or a “system†intensive application. This is similar to when we found the best memory timing and memory FSB combination. To find out which combo works better: Use a program to benchmark your system such as 3DMark01 SE, or playing a game while monitoring your frames per second (FPS). Note: the following instructions assume you have found your mobo and memory max FSB. To get started w/ the CPU:

1) Enter your BIOS yet again. Set your FSB to something around 40mhz below your mobo’s/memory’s max FSB.

2) Go into the “monitoring†section of your BIOS. See what the vcc/vcore reading is when your vcc voltage is set to “auto.†Depending on the quality of your power supply, the reading may be slightly under what it’s suppose to be. But from this reading you should be able to tell your stock voltage.

3) You can then either first find your max overclock w/ stock voltage, or you can up your voltage right away to find your max stable clock speed for that given voltage. When overclocking you should never allow your CPU to get above 55C (not above 48C is better), nor increase your voltage by more than 25% from its normal voltage (when using air cooling). Feel free to play around w/ higher voltages (25%-32%) for very short term usage. But for daily use, 25% is pushing it.

4) After deciding/setting your voltage, increase your multiplier one setting. Save and exit BIOS.

5) See if you can boot into your OS. If so, continue increasing the multi by one setting, until you cannot get into your OS. Once you can’t, lower the multi back a setting. Then run Prime95's torture test. If you get an error/crash while Prime95ing lower your FSB some and try again. If you pass for 12hours or more, increase your FSB. You should now be close to your maximum clock speed. Now to consider your overclock 100% stable, you should be able to run the torture test w/ out any errors/reboots/lock-ups for 12-24hours.

6) Now find your best FSB/multiplier combination and your set! Congrats on the overclock! Now go upgrade whatever is slowing you down, and do it again! The nice thing about finding all your max speeds is that if you upgrade say your memory, you already know what your motherboard and CPU can do.

On air cooling, 1.55-1.6V should be fine for everday use, as long as your temps are fine.
 

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head over to dfi-street.com and there are alot of overclocking guides and what to change in the DFI bios. It will explain alot, that is the best way...I could give you some numbers to change, which would help, but you should become familiar with your bios before you change the wrong thing. Especially with a DFI bios.
 

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Discussion Starter #4
Alright w3rd. I read the official guide over at DFI street. Some of it was confusing, but I pretty much understood the part I needed to know about the actual overclocking lol. I didn't read the memory guide at the end yet though.

Couple questions. They say to put the default multiplier on for cpu when testing. So since my cpu is 2.2ghz with auto multiplier, my fsb is 200 mhz, then my default mulitiplier is 11.0 yes?

And I'm still a little iffy on the voltage. Do I just start adding voltage after some tests fail? And in what increments? There was a great voltage guide written on here one day that explained a lot and then it got taken down...
 

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Yes your default multi is 11. Just up your fsb in increments of 5 to 10mhz, and if you can't boot all the way, get a blue screen, or fail a stability test, up the Vcore by .05V and try again. Keep going until you reach about 1.55V-1.6V under full load or your full load temps exceed 50*C.
 

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Discussion Starter #6
Quote:


Originally Posted by erauman

Yes your default multi is 11. Just up your fsb in increments of 5 to 10mhz, and if you can't boot all the way, get a blue screen, or fail a stability test, up the Vcore by .05V and try again. Keep going until you reach about 1.55V-1.6V under full load or your full load temps exceed 50*C.

Thank you very much. I always knew I would need to add voltage and I didn't want to get to the point of not being able to boot at all. So I'll definitely do small increments with the fsb also so that I can be more careful and know when to add volts.

Another question, in that guide they explained that the HTT on my board automatically adjusts correctly, so do I still need to do this step to the HTT when trying to find my max CPU mhz like in the question above:

"LDT/FSB Frequency Ratio (LDT Multi) to 2.5x or 3x.
Setting this lower right now will make sure that your total HTT speed doesn’t cause instability."
"LDT/FSB Frequency Ratio (Ram Ratio) to 100(Mhz)(1/02)
This is much lower then you should ever set this but it will make sure your ram is running way under spec and wont be causing you any problems at this point.."

I would believe so right? Because I'm forcing it down so that I can test just my cpu?

Here is the dfi street link to just the OCing part btw:http://www.dfi-street.com/forum/show...67&postcount=3
 

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Yep, I'd put the Ram ratio down to 100, just whilst you're checking the CPU and lower the LDT Multi to 3 as soon as you go over 250HTT.
 

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whatever your FSB (cpu frequency) is, you always multiply that by the HTT multiplier to find the stability zone.
So if your FSB stock is 200, your HTT multi should equal as close to 1000. So that's 200 x 5.
When you increase your FSB to say 240, you want to change your HTT to x4 to get as close to 1000.
HTT speed doesn't do anything for performance, but should be set in a range that your computer isn't unstable.

Here's that cpu chart so you will know what settings do what. Try to not leave anything set to auto.
 

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Discussion Starter #9
Quote:


Originally Posted by Ste

Yep, I'd put the Ram ratio down to 100, just whilst you're checking the CPU and lower the LDT Multi to 3 as soon as you go over 250HTT.



Thank you erauman and ste. I gotcha on the htt multiplying part. That chart is for adding extra voltage, but I've got the multiplying concept so no prob there. As soon as I get an answer to that ram ratio part, I'll be on my way to testing.


lol
 

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Discussion Starter #10
Ok, I'm on my first run of stability checking, thanks again for the help.

I've got a question I believe I should ask before I get too far along. My default CPU Vid Control is Auto, and my CPU Core Voltage is currently as 1.32v. So that is my default voltage then correct? I just want to clarify that before I get to the part where I need to start adding .05v.
 

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your default voltage should be 1.35, but it might undervolt because of the AUTO selection. Or it's just a wrong reading.
Increase your FSB until you get instability, make sure you have a divider on the memory, and that you change the HTT multi accordingly. When you get instability, increase the voltage slightly, like .025v.
So from 1.35 to 1.375, or go up in .02's. It's pretty simple once you get the hang of it.
 

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Discussion Starter #12
Alright cool thanks.


And the memory divider part... That would be what Ste was talking about right? Setting the ram to 100 mhz (DRAM/FSB 1:02). That's what I currently set it down to so that it won't be a factor in me trying to find my cpu max.
 

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yea thats right about the divider, you didn't have to set it that low, but I guess if you really want your memory out of the picture, that's the way to do it

and when you want to find your memory maximum, do the same thing with the cpu Multiplier, drop it to like x7 or x8.
 

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try to have it running prime95 overnight or some stability test....it's always good to "know" if it's truly stable at those speeds.

Soon you will have to increase your vcore. But probably not until you get to 2.5 area.
 

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Discussion Starter #16
gotcha. While I went to my afternoon class, I ran dual prime95 for 3H 16M with no errors at 225x11 at stock voltage.

I had a question about the HTT. Ste was saying to lower the HTT down to 3x as soon as I get over 250, but wouldn't say 4x 260 be better than 3x 260? It's closer to 1000. Like currently, I'm at 230x11 right now with my htt still at 5x. I about to run my stability tests. Just checking in. I know you want to keep the htt around 1000 and I was wondering if it would be odd to drop it down to 3x htt after 250?
 

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HTT doesn't do anything for performance, whether it's higher or lower. So it's more of a stability thing. With 230, i would use x4....with 270, x3....
I never use the x5 HTT unless I'm at stock FSB (200)
If you run into stability problems, decrease the HTT, usually if the HTT is the cause of instability, you wont be able to get to the Windows loading screen, it will just keep rebooting.
 

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Discussion Starter #19
I have a CoD2 match in just a little so I'll get back to my OCing after. I got a pc lockup while running SuperPi with 235x11. Looks like I'll be upping my voltage.
I also have lowered my htt to x4.
 

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You may also need to increase the LDT and vdimm voltage when you get to match the HTT of the CPU to the high end of the RAMs speeds.
 
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