Is my card broken?

So i have a 8800gts (g92) 512 ddr3, EVGA.

and with riva tuner and ati tool is shows my memory clock being 972 Mhz.
And my core clock at 650 Mhz


But shouldnt it be 1940-1944 Mhz?
And core at 670 Mhz?

http://www.newegg.com/Product/Prod [...] 6814130325

Do i not understand GPU's as much as i thought or is this thing broken?

mobo is a biostar Tforce 4 sli.
3gb of ddr2 800
proc is dual core athlon 64 x2 3800+
Chipset Nvidia Nforce4 Rev. A3

Thank you sir i was sure it was something as simple as that. just wanted to be assured. i thought i would have noticed half ram anyways.

Is there a good resource where i can find where others have safely overclocked there g92 core to?

I right now am overclocked to 720 from 650 core and 1052 from 972 memory.

but how do i know if its good
it finds errors on stock settings in less than a second

its usually 2-3 pixels, i made another topic in overclocking 3d chips forum,
http://www.tomshardware.com/forum/247923-29-8800gts

i think tonight im going to set everything back to default, restart and run another test.