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Properly Overclocking an Intel 3.4E Ghz

M

mnarciso

Member
Hey guys, I was recently trying to overclock my Shuttle since many people have successfully overclocked their 3.4E Ghz Prescotts to above stock. i have a pretty good heatsink which is Shuttle's proprietary ICE cooling system. My temperatures are normal and I was wondering if anyone would be able to lend me a hand on overclocking.

I tried myself earlier with the basic knowledge I have but ended up getting BSOD's. The first thing I tried was upping the FSB. First I turned on lock at x14 multiplier and set the FSB to I think it was 250 which would give me a 3.5E Ghz. However this just ended up screwing up everything and locked my computer. So I reset the CMOS and everything was back to normal. I guess it didn't like the upping of the FSB. I pretty much just stopped right there as I had no idea what I was doing pretty much. No damage to the CPU after that luckily after running 6 hours of Prime95 everything seemed just fine.

What should I be doing when I overclock this thing? I don't think my motherboard has the option to change the multiplier. It only has an option to Enable or Disable the Lock at 14x multiplier and then to change the FSB to a max of 355. Why did it lock at 250 FSB? I know I might have done a totally noob thing but I'm here to learn right? =)
 
so I take it the regular FSB is 242. check to see if your bios allows you to change the DRAM:CPU ratio. right now, when you up the FSB, you really start stressing the memory. if you can drop the cpu😀ram ratio, you'll give the memory some slack. if you can't change the ratio, I wouldn't even try to overclock. if you can change the ratio to 5:6, 4:5, or 3:4, start upping the FSB in 2MHZ increments. 3dmark05 is a good stability checker.
 
actually by default its 200 x 17 = 3.4E Ghz, so thats normal. Hmmm I think I have a ratio changer, I always thought the FSB on RAM and on the CPU were totally asyncronous and that effect the FSB of the CPU would not effect the FSB of the RAM. Please correct me if I'm wrong. Anyway can you explain the ratio thing? What is the first number and what is the second number? For example in 5:6 what is 5 and what is 6? Thanks for the help! I'll be sure to run 3dmark05 and do as you said.
 
leave your multiplier at 17. increase FSB to 210, 215, 220, 225, etc. at anytime you hit instability, up cpu voltage by 5%. if that doesn't help, change cpu:ram ratio to 5:4. if stable, keep moving fsb up. if not, change to 4:3. if stable keep moving FSB up. if not stable, you've just about reached your limit. keep us up on your progress.

the ratio will force your memory to run at 3/4, 4/5, or 5/6 the FSB.
 
nmarisco, DONT UP YOUR CPU VOLTAGE MORE THAN 5%!!!! I just wanted to be clear. Do not go above 5%!!!
 
Hmm I don't have an option to go up by percentages hehe unless these are read as percentages decimal wise I have an option of 0.825V~1.5875V and AUTO.
 
you have to calculate the percentages yourself 😉. only up the voltage once you've gotten your fsb up. it is going to warm your cpu up and that heat set up isn't the best. you shouldn't have to up the volts until you get around 3.6GHz.
 
Hmmm, this setting is usually set on auto so I guess I'll have to look at the BIOS to see what it defaults at. Is "under-volting" going to hurt the CPU? i just want to go with the safest way to not damaging my CPU. Of course just not messing with any of these settings is going to give me the best percentage of not scewing up but I feel like getting my hands dirty hehe. So how high should I be able to get and what are acceptable OC temperatures? Like with your 2.8c processor what temp are you running at with your new 3.34c OC?
 
my idle is 40 C and I get up to 65 C on load. I'm using an old P4 1.6 HSF though which is not great (just bought a new one). if you set to auto, the mobo will apply the default voltage for the cpu, so no worry. If you undervolt, you won't damage your cpu, but it may not boot. just set it to auto. I'm going to be offline for a few hours. if you can't get other assistance, my advice is to be careful with the heat situation. you can have the bios shut down the comp when the heats get too high (85 C) so the cpu isn't damaged.
 
Wow 85 won't damage the CPU? Anyway all your help was great guru I'm going to try all this right now. Thanks a lot again =).
 
So I've come to the conclusion that my mobo can't really overclock really well. There is no ratio adjustment and I can't adjust the RAM frequency as freely as I thought I could. I can only go in 333 and 400 mhz increments. I had successfully gotten up to 205 Mhz but after that it was hard. I got it to 215 and then tried upping the voltage to 1.4 and after that I didn't want to keep going as I got scared that I might be going to high but as I upped the voltage the stability got higher and higher. Do you think I could go higher in voltage? Under AUTO settings PC Health tells me that the voltage is at 1.26 for CPU. After adjusting the voltage to about 1.4 PC Health still tells me the voltage of the CPU is around 1.26. Am I doing anything wrong or do you think I should go higher in volts?
 
The most you should put on a Precott on air is probably 1.55v. Keep the temps under 70C.
 
will your overclocking system work on my p5ad2 mobo with a 3.4mhz p4 lga 775? im waiting for the memory and 6600gt pcx to come in from new egg ocz 3-2-2-8 ddr2 533 i was told to pick that over the crucial 4-8-8-10 ddr2 667 memory. im refering to the 2nd and 4th post of guru
 
Originally posted by: spunducky
will your overclocking system work on my p5ad2 mobo with a 3.4mhz p4 lga 775? im waiting for the memory and 6600gt pcx to come in from new egg ocz 3-2-2-8 ddr2 533 i was told to pick that over the crucial 4-8-8-10 ddr2 667 memory. im refering to the 2nd and 4th post of guru
Click to expand...

I don't know anything about ddr2 spunducky. if it all boots together, you can start with the fsb, then cpu voltage, then ratios as described. i can't think of any reasons it wouldn't work so long as your mobo allows bios tweaks.
 
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