Overclocking an Athlon64 2800+ with an Abit KV8

[Athlonin]

Im new to overclocking but have done some research. I first set my memory to the lowest speed and moved down the LDT multiplier, set the vcore to 1.6. I then upped the fsb to about 255 before I had some real issues. This seems like a very large overclock to me ~500Mhz. Is this what most people with this processor can acheive? And this mobo doesnt have a pci/agp lock. I still have to find the fsb where I have 100% stability but I would think its about 250, maybe a little lower. Right now im just running prime95 and I see my cpu temp reaching near 60c on stock cooling. What do u guys think?

 

[dennisjai215]

pretty damn sexy if there are no errors.. i wouldnt see 60c as a problem but whenever i want to overclock i always get a 3rd party hsf

 

[Shimmishim]

the issue is probably with your components...

what pci cards are you running? and video card?

you're running things out of spec so try to becareful because you can start to get hard drive corruption... unless you're using an IDE then you should be okay... i think... :X

 

[Athlonin]

well i just upgraded my computer with this combo. I am using the pc2100 crucial memory from my old system and that seems to run stable up to a speed of 153Mhz. So until I upgrade my memory I can put my fsb to 237 and have the memory clocked at 153 or I can underclock it at the lower speed and raise the fsb up to like 250. I know I really need to upgrade the memory, but anyway.... I have a gf3 ti200 right now and will be adding in my santa cruz sound card and tv tuner in my pci slots. I use IDE hard drives. At what fsb speed is "safe" for my components?

edit: I think the high pci/agp frequency at 250+ is the reason I can't push the processor any higher. 237 fsb seems pretty safe for all my components and works with my memory as well. I have read that Abit included additional multipliers for the pci/agp frequencies which are supposed to reset back to 33/66 at fsb speed of 233. On my board at least, this does not seem to be true. I wish it did. Any advice?

 

[jpunzel]

I have a KV8 as well. Unfortunately, Abit won't likely add any more features to their K8T800 boards, in favor of their newer K8T800 Pro one, which should soon have AGP/PCI lock. Your first step would be to upgrade to some good DDR466 or 500, so that memory won't slow you down. After that, the only limiting factor is your PCI devices, which you can experiment with over time. A safe FSB for me seems to be at around 239/78/39. Anything above that will cause risk of filesystem corruption, because the HDD controller runs on the PCI bus clock also.

 

[Athlonin]

It sucks that the chip can clearly overclock past 237ish fsb (the point where the agp and pci frequencies become an issue), yet you can't take advantage of this with this board. I guess I'll have to live with a 300 mhz overclock.

I swear that this motherboard is supposed to reset the agp/pci frequencies at 233 fsb. I read this in the anandtech review. What the hell! Does anyone with this board have this feature working???

 

[jpunzel]

Nope. I wish, though.