nines- :
Hehe, i guess it is not a very basic board. It's ridiculous, but it has only only 2 values for the voltage parameters. The set value and "AUTO". So i guess ths board is not made for over clocking.
It is written in manual too.
And is there a way to change it? Like upgrading bios or smth? Or is it mobo that simply cant incaese voltages? Should i buy a new one?
See if there is a bios update but I doubt that will solve your problem. I read some reviews on newegg about your mb and they were not that favorable. Of course those reviews are not always accurate. I don't think I would consider your mb and enthusiast board that supports a lot of bells and whistles. If the options are not in your bios to change the multiplier or voltage and changing the fsb screws up your system you might want to get a new board.
Most newer mb do allow you to increase the voltage and fsb not always the multiplier. That has been my experience. esp if they are budget boards with built in graphics.
I also did a google search for your mb and did not find any reviews on it. Another sign that it might not be that popular.
This was from the review about the 5000+ BE chip
Overclocking the 5000+ Black Edition couldn't be easier. Head into the BIOS and start the upward climb of the multiplier. Of course, for total system enhancement, you will want to adjust the memory and HTT as well, but for this review we will just be dealing with the CPU and increasing the multiplier to test the performance of the CPU. Highest benchmark stable clock was 16x200MHz at 1.4V for a CPU speed of 3200MHz. The other benefit is that with the 16x multiplier, the RAM divider is 8 and allows the memory to be run at 400. The 5000+ was able to boot into Windows at 16.5x200MHz at 1.5V but was not benchmark stable. I believe the motherboard was the bottleneck as there were no voltage adjustments other than CPU and Memory. With a little push on the HTT voltage, it should have been stable. But even this mb is not the best. As you can see it does not have a voltage increase for the HTT voltage LOL so you might want to look for a mb that has voltage setting for the cpu, memory, and HTT and multiplier settings for the cpu as well.
This is the mother board they used. ECS A770M-A
http://www.newegg.com/Product/Product.aspx?Item=N82E16813135069&Tpk=ECS%2bA770M-A
Not that best review on the egg for this board but the review does show that it can over clock the 5000+ BE pretty well.