7800gt bios volt mod, what went wrong ??

[zipp0r]

so i used nbitor 2.8, extended voltage tables and selected 1.5v as my 3d voltage, didnt clean up voltage tables (guide said not needed). but ive had nothing but instability from the card since. it clocked less and it hardlocked most of the time. so i reverted back to the 1.4 bios. but i wanted to show my 1.5v bios to you lot to see what i did wrong.

http://rapidshare.de/files/21646582/15v.rom.html

p.s im pretty sure it reported VID 6 in rivatuner while using it, on the 1.4 bios its showing VID 7 ? :/

[zipp0r]

er just looked at my cards bios with riva tuner and it says:

$1100000000 Title : GV-NX78T256V-B F2
$1100000002 Version : 5.70.02.13.01
$1100000100 BIT version : 1.00
$1100000200 Core clock : 275MHz
$1100000201 Memory clock : 700MHz
$1100010000 Performance level 0 : 275MHz/500MHz/1.20V/28%
$1100010001 Performance level 1 : 405(+40)MHz/500MHz/1.50V/43%
$1100020000 VID bitmask : 00000011b
$1100020100 Voltage level 0 : 1.20V, VID 00000000b
$1100020101 Voltage level 1 : 1.30V, VID 00000001b
$1100020102 Voltage level 2 : 1.40V, VID 00000010b
$1100020103 Voltage level 3 : 1.50V, VID 00000011b
$1100030001 Core thermal compensation : 8°C
$1100030002 Core thermal threshold : 115°C
$1100030003 Ambient thermal threshold : 110°C
$1100030004 Thermal diode gain : 0.792°C
$1100030005 Thermal diode offset : 23.060°C

thats with a supposed (what i thought was) a 1.4v bios. so my card runs 1.5v default?? im confused!!!

its a gigabyte 7800gt 405(+40)/1000mhz card.

[chariot]

400/1000 alright. That sais it's a 1ghz ddr memory, which means 500mhz, and your rivatuner log sais 700(1400) which is most likely giving you the unstability. Without a memory voltmod you may not even get above 1150 or 1200 (600mhz).

Hope it helps. Good luck.
Greets. Rise

[zipp0r]

i dont know why that bit says 700, my memory clock is at 625(1250). it might be the startup speed, 700/2 so 275/350 bootup clocks untill it loads the drivers.

what i dont understand is, what voltage should this card use as default ?