Question about CPU FSB on a ECS K7S5A Pro

[Salvador]

I just installed a 2400+ 266 FSB cpu on a ECS K7S5A Pro board and noticed that it's giving me the option to run the CPU at 333 (166) FSB and the chip is only a 266 FSB. Can I run the chip at 333 (166) FSB and OC it this way? What would happen if I ran it this way?

TIA,

Sal

 

[pspada]

It could work just fine - assuming both your CPU and memory can handle it. The reason it wants to run at 166 is that is the default setting for the fsb on the jumpers on the mobo. If you want to run a 133 chip and memory, you need to adjust the jumpers.

 

[Salvador]

It could work just fine - assuming both your CPU and memory can handle it. The reason it wants to run at 166 is that is the default setting for the fsb on the jumpers on the mobo. If you want to run a 133 chip and memory, you need to adjust the jumpers.

Not actually. I changed the jumpers from 100 FSB to 133 FSB (only two jumper options for this board). I was running an 1800+ in this mobo (putting it in another machine) and when I had the 1800+ in there, all it gave me the option of running in the BIOS was 100 or 133. Now that I have the newer 2400+ 133fsb (266), it gives me the 166 option to run my CPU at as well as the 100 and 133 option. At the moment I'm running the CPU/RAM at 133/133. I have the option to go 166/133.

What would happen if I try it? Would it fry my cpu or just not boot if it won't work? I don't mind if it doesn't boot, but I don't want to kill my processor.

This RAM will run at 166 speeds, even though I don't have the option. I was running both sticks of this Crucial PC2100 (256 mb's each) RAM in a 333 board and it ran great.

Should I give it a shot?

Sal

 

[robcy]

Its probably giving you the option of running FSB @ 133 and MEM @ 166. The PRO boards where able to run DDR2700 ram at spec. Go ahead and try it, but I doubt it will try to run the CPU @ 2500mhz. From Experience the SIS735/745 chipset MB cannot boot up at 166fsb. Once in Windows you can change the FSB to 166 with CPUFSB or something similar, and it has the correct dividers for the PCI/AGP slots, hell, its got the correct dividers for 200fsb but you will need a Copper sink with fan on the chipset for that. I have a Barton 2500+ running on a K7S5A v1.0 at 166/166 without any problems.

 

[Salvador]

I went ahead and tried it. The screen went black as soon as I saved the BIOS settings. Had to reset the CMOS to get it to post. Oh well.. It was worth a shot. At least I won't wonder now.

Your Barton is a 333, isn't it? I didn't think that the ECS boards supported 333 in the first place though. How did you get yours to work?

Thanks again.

Sal

 

[robcy]

I boot it at 11x133 in bios, and use CPUFSB to load with windows, and automatically change the FSB/MEM to 166/166. Use the latest stock bios with this since the modded bios run to tight timmings at 166, and this causes instabilities. I ran another 2500+ at 200/200 once using the same process but the chipset overheated, put a Vantec copper sink with fan, and that ran fine. This 2500+ does not overclock that well, but this setup runs very well. It post my Barton as 1700+.