Need more voltage on Abit SE6 mobo

[batboy]

Hi, been lurking here for a while, but this is my first post. Done some OCing before too. I have a Celeron 566 running happily along at 100 MHz @ 1.65v on an Abit SE6 board. I can get 950 out of it and run benchmarks, but I can't break 1 GHz. It'll boot at 120 MHz @ 1.7 volts, but lock on Windows startup. I'm using a 256 meg stick of PC133 Memory Man RAM, thermal grease, golden orb cooler, case mods and extra fans. Cooling is no problem...CPU is usually about 40-42 under load. I think it will go if I could boast the voltage to 1.8, but I'm maxed out at 1.7 in the BIOS. What can I do? Will a BIOS update give more voltage settings? Is there a way around it? What are the best CAS timing settings to use? Anyone else out there that is making a 566 dance at 1+ GHz? Thanks.

[DocClock aka MadClocker]

My coppermine, (cBo 600e) crashes above 37c..I would say that heat is your prob.. you could also run your timings at 4:4:1, or 4:3:1 in softmenu!!!.....might get a couple of mhz more
Good Luck

[Tim-]

To get more Vcore- read here:

http://www.hardocp.com/articles/intel_stuff/bumpvoltage.html

Good luck

[batboy]

Tim, interesting article...know if many other folks have done this? Also, I discovered that there was a BIOS update, so I flashed the BIOS and now I can get 1.75v max (previously 1.7v max). Still not enough voltage to run stable above 112 MHz.

Doc might be on to something with the heat. At idle and just surfing the 'net, my CPU runs 34-35 degrees and 40-41 after playing Unreal (Celeron 566 @ 850 MHz). But, now I've been watching temps a bit closer as I try overclocking past 100 MHz bus, and the CPU temp is usually at 43-44 when I fail to start the OS when using 120 MHz or when I crash at 115 MHz.

I'll look into better cooling before I do anything else at this point. Any suggestions are welcome. I know types of coolers are a matter of opinion. I'm staying with conventional air cooling, at least for now. Thanks for the response.

[Tim-]

I've done it a half dozen times on several different boards. The article discusses the cb0 only. For a cc0 it becomes a little more complicated.

More cooling is definitely in order for you. I have a PIII that gets picky around 45c, and have seen many others saying that this is typically where troubles start.

[batboy]

Tim, so if you do this mod, the voltage is really 0.15v more than the BIOS setting? A 1.5v setting is really 1.65v? Am I uderstanding correctly?

I bought my Celeron 566 flip chip last July. Which step is it likely to be without taking it out? Thanks.

[Tim-]

It's likely to be a cb0. The MB reads the pins on the cpu to determine what the default Vcore should be. This mod changes the pins so that it reads it as needing a higher Vcore, and shifts the range of adjustment in the bios. The selection and reading process is the same- you select from the bios choices and it provides that voltage. It indicates the voltage properly as well.

[batboy]

Ok Tim, thanks for all the info. That will be the "Plan B" on my quest for 1 Gig. "Plan A" is upgrading my CPU cooler. I've about decided (probably) on an Alpha, maybe the PAL6035 with a thermister controlled fan. If my fan choice is flakey, someone please tell me. I'm also adding a couple more case fans and drilled some vent holes in the top of the case (see my other post on case modding that should of been in the general forum).