can anyone help me with this?

ok, let me explain the weird issue. I have the 9500MGS you know is made up of two cards. Now the driver I'm using is the latest 185.86. Now till yesterday, everything was working fine. I could OC both my cards well and they were working fine. I use Evga precision for OC and I set the custom clock values to be set at system startup, for the integrated & discrete cards both. Now what happened today was that when I booted my lappy, after windows loaded, Evga set totally low clock values for the integrated card, for no reason. Now the default core clock value for 9400MG is 450Mhz. What I saw in Evga today was just 350mhz. I immediately opened GPU-Z, it was showing core value at 450mhz which i thought was fine but I still have doubts. Now till yesterday, i had set it to 500mhz by using Evga. What led it to lower clocks, I dont know. Now when I use Evga to overclock the core value it goes only till 373, anything beyond that and it bounces to 373. Doesnt go close to 450mhz, now that is absurd. I wanna know if this is a bug with Evga, why is it showing me 350mhz whereas GPU-Z shows the default 450mhz and why did it reduce when I had set it to 500mhz before? Help me bring it back to 500mhz

EDIT: Only Evga works for me. RT has greyed out sliders and atitool gives me error....

 

if you want to OC, for a notebook... use:
- Nvidia System Tools

Or modiafy the VBIOS to keep the OC hard-programmed... so you do not have to deal with software issues with OC:
- GPU-Z (for VBIOS dump) and Nibitor (for editing the clocks)

 

It sounds like the EVGA utility could be in error. Try removing the setting to set the clock at bootup, reboot, and see what happens. If that still doesn't work, try uninstalling and reinstalling the drivers and/or EVGA utility.

 

Oh, another idea: try running a benchmark or a game to see whether your framerates/scores are lower than they were before. If they are, then the EVGA utility has it right. If not, then something's wrong with the EVGA utility.

 

System utility gives me error 'invalid values' and than bounces back to original clocks. Now another weird thing is that system utility shows memory clock as 450mhz whereas evga still shows 350mhz. Seems like some kind of bug with evga. And i'm sure dell disabled dynamic OCing and they refuse to give the Vbios cos they dont keep it. If somehow i get a good Vbios, I can OC both my cards with no limits

 

That is incorrect, the Dell Studio XPS 13 has a Geforce 9500M sometimes also refered to as the Geforce 9500M G or GE which is not the same thing as the Geforce 9500M GS. As you already stated the Dell Studio XPS 13 has a hybrid Geforce 9200M GS in SLi with a Geforce 9400M G both which are entry level graphics cards while the Geforce 9500M GS is a single graphics chip which is to some extend more powerful as a performance graphics card. Best not to confuse the two chips while looking to overclock.

 

I cant understand...Why than is the control panel showing 9500M GS?

 

which control panel? all my tuning things on my old desktop showed my 7900 gt as a 7900 gs/gt. wouldnt worry.
to fix the dodgy clocks, reset the clocks to default, uninstall your tuner, and start again fresh. reinstall the graphics drivers and then the tuner and see if that helps.

 

Nvidia Geforce 9500M GS 256MB DDR2 or DDR3?
If it is DDR2, I guess the Memory Clock shouldn't be 450MHz as its default.

Solution:
Uninstall all your overclock softwares.
Uninstall your Graphic Driver.
Restart your computer.
Install your Graphic Driver.
Check your Graphic card using GPU-Z(I suppose it is accurate).
Install back the overclock software(I suggest Nvidia System Tools).