First overclocked Inspiron 531??

You may well be the first to do it on that machine.
Is it stable ?
Is such a small OC worth it ?

Didn't have to change any setting's on the psu to be able to overclock my card.
Did increase the psu's fan speed to help keep the temps as low as possible.
Do you have the box checked in your profile to always display sig ?

I've benched mine at 726 / 1200 , don't feel the need for more.
Have you tried the EVGA voltage Tuner, that may help you get more out of your's.
By the way, mine's a 65nm C216.

DellUser1:
My card is an MSI model, unfortunately it doesnt feature Voltage modulation capabilities. However it stays at a nice 54C while folding in the summer

AKM880:
I used nVidia Performance Tools, their latest edition, perhaps accidentally, supports overclocking the I531. If you've got an nVidia board, you can probably overclock too. I've tried all the others, they dont work. I'm using BIOS 1.0.12, unmodified, still under warranty

Yes, unfortunately it overclocks using the FSB so RAM speed goes up as well. Bad news is you can't change multipliers on either the CPU nor RAM. Good news is you CAN change timings on the RAM, though the cheap dell-supplied RAM seems to hit its limit around 765MHz, regardless of timing.

I tried using clock gen before and even selecting a PLL would lock up my PC, maybe they released a new version in the last year and a half? (doubtful).

hey dude i have the same dell model and want to overclok too, could you help? by the way i think that your system still rebooting cause you have the beta, maybe if you install the RC version of win 7 it stops

sorry i didn't specify, i got the Inspiron 531 with athlon x2 4000+ which runs at 2.10, 3gb ddr2 ram at 667 Mhz, by now i had reach 2.509 with the stock cooler if I increase the speed it turns unstable, as mew905 said he did I also used the envidia perfornmance tool,
These are the rusults

do you think this configuration its ok?
i really dont understand why some times shows 1194.9 and then when im using a heavy program shows 2509.0, is it normal? should i keep this configuration

Nice overclock BTW. Remember to check stability with a program like Prime95 while monitoring temps with something like HWMonitor or SpeedFan,

I trust HWMonitor more, SpeedFan always gives me false readings. I switched to HWMonitor and its fine.

Yeah Dell computers don't have the best cooling, those temperatures look okay on load. Try to keep it under 60C. I like to stress test for 6hrs+ to ensure complete stability. I ran Prime95 for 25hrs on my Dell. My AMD Sempron 3400+ is stable from 1.8Ghz to 2.3Ghz. Good Job!