Using Gainward GS 6800 gt bios for 6800 Ultra?!

[wizoforb]

What are your thoughts on this? I seem a little weary on trying to flash the bios of my video card.
I have all the info and programs and what not.....but I'm not sure where to find my old bios to back it up. I have nvflash and stuff....but where is the damn bios??

ASUS A8V DELUXE
PLEXTOR PX-716SA
AMD 64 +3200
(4) 512MB XMS CORSAIR PC3200 400 MHZ
BFG 6800 GEFORCE ULTRA OC (AGP)
(2) 74GB RAPTORS
(1) WD 120GB
Tsunami Dream Case<P ID="edit"><FONT SIZE=-1><EM>Edited by wizoforb on 05/20/05 07:51 AM.</EM></FONT></P>

 

[scottchen]

I wrote a guide on this in the overclock 3dsection, but why the hell would you want to use a GT bios for your ultra card, it wouldn't work because the ram is different. What do you want to change?

 

[scottchen]

btw <A HREF="http://forumz.tomshardware.com/hardware/modules.php?name=Forums&file=viewtopic&p=687934#687934" target="_new">here</A> is the guide, it's titled 6800GT volt mod but that process works for all nvidia cards. I still see no reason why would you want to downgrade your bios.

 

[wizoforb]

Go here http://www.bleedinedge.com/guides/vid_bios_mod/vid_bios_mod_01.html......This explains that the bios of the 6800 GT has "tighter" memory timings then the 6800 does.

ASUS A8V DELUXE
PLEXTOR PX-716SA
AMD 64 +3200
(4) 512MB XMS CORSAIR PC3200 400 MHZ
BFG 6800 GEFORCE ULTRA OC (AGP)
(2) 74GB RAPTORS
(1) WD 120GB
Tsunami Dream Case

 

[scottchen]

And then it stops working... congratulations.

 

[wizoforb]

What are you talking about?

ASUS A8V DELUXE
PLEXTOR PX-716SA
AMD 64 +3200
(4) 512MB XMS CORSAIR PC3200 400 MHZ
BFG 6800 GEFORCE ULTRA OC (AGP)
(2) 74GB RAPTORS
(1) WD 120GB
Tsunami Dream Case

 

[scottchen]

6800ultra cannot use 6800gt bios, just like 6800gt cannot use 6800ultra bios.

 

[wizoforb]

So this guy that posted this article is wrong? How did he mannage to do so?

ASUS A8V DELUXE
PLEXTOR PX-716SA
AMD 64 +3200
(4) 512MB XMS CORSAIR PC3200 400 MHZ
BFG 6800 GEFORCE ULTRA OC (AGP)
(2) 74GB RAPTORS
(1) WD 120GB
Tsunami Dream Case

 

[scottchen]

If you want to risk it go right on ahead, but 99% you will fail. Performance gained will be less than 0.1%

 

[wizoforb]

That's why im asking. I want to know what the hell this guy is talking about. It didn't sound that great of an idea, but thats why I asked here to get a better understanding of why in the world would you do it. I was ready to do it, but I dont want to f it up.

ASUS A8V DELUXE
PLEXTOR PX-716SA
AMD 64 +3200
(4) 512MB XMS CORSAIR PC3200 400 MHZ
BFG 6800 GEFORCE ULTRA OC (AGP)
(2) 74GB RAPTORS
(1) WD 120GB
Tsunami Dream Case

 

[scottchen]

You can try to flash bios to increase core voltage to 1.5V i've tried that but failed on my card. So i plan to hard mod.

 

[cleeve]

I don't know if it's worth it. It's been done alot but it's probably better left to the guys going for the highest 3dMark score.

I tried it and my card worked fine, performance per clock increased a bit, but my max o/c went down notably, so without watercooling I personally wouldn't bother.

But for sure it works.

________________
<b>Geforce <font color=red>6800 Ultra</b></font color=red>
<b>AthlonXP <font color=red>~3300+</b></font color=red> <i>(Barton 2500+ o/c 412 FSB @ 2266 Mhz)</i>
<b>3dMark05: <font color=red>5,275</b>

 

[scottchen]

Worked in 3d mode? because as far as i've read, switching bios either way causes card to lock up in 3d.

 

[scottchen]

Have you tried to up voltage to 1.5V? That failed for me

I think most 6800ultra with proper cooling should reach 470mhz no problem, since BFG has a watercooled 6800ultra that's clocked at 470/1100, and its default voltage is still at 1.4V