hello-- i asked this question in hardware, and they directed me here... i have an amd xp2400+ processor (thoroughbred)-- runs at 2.0ghz I nudged my fsb up to 143mhz which has my processor running at about 2.175 ghz. Is it now an xp2600? how about xp25001/2- lol. in related news... I cant set the board settings past 143/143. at 147/147 i get alot of errors under very heavy load (video editing and encoding/3d games/etc.). beyond 147/147 i just get black screen at startup and i have to clear my cmos and lower it again. Kind of a bummer since my temps with the desk cabinet door shut after encoding video for hours is a comfy 100case 120processor. i would like to nudge the fsb just a wee more. I think its because one (or more) components cant handle the increased clock speed they recieve from the FSB being raised. The suspects are: 1)crappy sis chipped no name 32mb 2Xagp video card (my board is new and supports 4X too-- i have 2x enabled in bios). 2)no name pc2100 ddr 512 stick. although the 2100 matches my mobo and chip clock speeds (officialy 133), should i have bought faster ram? i've heard synchronous was better. maybe maybe suspects) brand new pci v92 modem??????cheapish cdrw and dvd, etc??????? and on the subject of the video card-- should i be using the no name sis 32mb 2x agp card, or my nvidia 233mhz 32mb gforce !!!PCI!!! card. i've heard of problems using a pci card in an agp board-- myth? I know the nvidia is a higher quality card, no doubt, but will the pci interface make it not worth the switch? eventually i'll go 4x agp, but not for a while as building this thing has wiped out the budget for a while. say for the next six months which card should i use? (then i'll go agp and raid with a second 120gb 7200rpm...mmmmmm...). but-- SIX months of everyday use till then... thanks alot for all the help over time.

I hate to reply to a question with a question but I think I am in the same boat as you. I have been taking peoples advise on overclocking via BIOS and have always had to clear CMOS to reset cause I get black screened. I tried just bumping it up to 143 as you have and I am running fine. I only am getting 2152MHz out of it though. Did you change anything else or just the FSB? I have yet to try it @ 147 FSB. I will see how that goes and post again. I have all name brand components and they seem solid. Hmmm, wish I could be more help on this but after overhauling my system (new mobo and CPU) I am in the testing processes as well. Joshua

ARGH! Same problem as you. I booted it up @ 147FSB and in ran great @ 2209GHz for about an hour. I ran some pretty graphic intense games and tried to push it a little. The temp was just fine (never getting over 116 degrees) I just started getting some random errors (annoying). So I brought her back down to 143. I hope we can get some help out of this! Appreciate anyones input. Joshua

2.2g is a common limit for default vcore for an xp tbred, which is what you both have. You haven't mentioned your motherboards but they might not be able to handle anything over 140, or they are dragging along the pci bus and agp bus and memory speed with them and one of these is the problem. I suggest more vcore and a reduction of the fsb and an increase to the multiplier. The current amd xp tbred line all max out at about the same ghz, meaning a 1.5g 1700+ may get to 2.2g at 1.6v and a 2400+ may also get to 2.2g at 1.6v. 1.75v-1.85v should get you to 2.4g or so. This assumes you do it with multi increases. 50C is high for an overclocked cpu. A stock cpu will probably be stable at 60C, but an oc'd cpu may be unstable at 50C, requiring 40C to be stable at that speed. The more mhz and vcore the hotter it tends to run and yet the cooler it needs to be. This may not prove true in your case, but its worth a mention.

Running at 143 FSB, I havent got passed 45 degrees celcius and is stable as a rock so far (almost 24 hours running). I tried dropping the mult. to 13 and bringing the FSB to 166 and bump the Vcore to 1.75v and the mobo went tits up. Currently I am running all defaults (Vcore & Multiplier) @ 143 FSB. I can live with the 2.15GHz but just wish I could squeeze a little more out. system.. CPU:AMD XP 2400+ TBred B MoBo:MSI KT3V MS-6712 333FSB AGP:Radeon 8500 DDR 64mb Mem:1GB Kingston DDR PC2100 266 PCI's: -SoundBlaster Live 5.1 -Lynksys Ethernet 10/100 -Via 2.0 USB's (4) -v.90 56k Uh.... back to testing I guess... Joshua

Looking at your specs, I would say that your memory is letting you down. By setting your FSB to 166, it is likely that you are trying to run DDR266 at DDR333. I am running my 2400+ @ 13x166 w/ 1.7vcore and it is as steady as a rock, running a cool 32C idle and 36C under load.

thanks again johnoh. bios has no vcore or multiplier settings (k7s5a pro with cheapoman bios). oh well, it was 30 bucks!(99$with the xp2400+). the memory issue would apply to me as well adam. would setting the memory at 143 and the cpu at say 150 be a viable option? i'm told synchronous speed is better. any opinions? thanks. GOOD LUCK JOSHUA!!!