7800gs Bliss 512 AGP + Nvidia sentinel warning

[JohnnyG]

I keep getting a Nvidia sentinel warning when I boot into windows about my 7800gs Bliss 512mb AGP card not having enough power & it will run at lower settings to prevent damage. All cables are connectly properly & I have tried 2 psu's (530w & 600w) it happens with both. It happens with any version of Forceware drivers I use too & the temp. never goes above 50c. BIOS version on my card is 5.70.02.13.GP.
I've emailed support about this but wondered if anyone had any ideas whilst I wait for a reply.
Cheers

 

[JohnnyG]

I can't really try it in another system, I'm about the only one left with AGP
The physical connections seem fine

 

[JohnnyG]

New tagan on the way for me.

I picked up one of those on the way home today (530w) hoping that would sort it out but it didn't
On further testing it happens when the system has been running for a while, but it's doesn't seem temperature related as that never seems to go up

 

[JohnnyG]

I got a refund & a 7900gt 512mb, A64 3200+ & BFG NF4 Ultra board