View Full Version : Flashing a 5900 Ultra question

02-28-04, 03:57 AM
Hi guys, I see lots of people flashing thier 5900's to 5950 Ultra's but can you flash a 5900 Ultra to a 5950 Ultra?

I have a Gainward 5900 Ultra GS


02-28-04, 04:32 AM
Unless you can't reach it with stock BIOS, you could try flashing it, though your voltage will increase. You could most likely reach 5950's speeds without a flash I presume.

02-28-04, 06:18 PM
True, but flashing the card is way more entertaining, plus it's l33t and you don't have to worry about your mem clock resetting to 850MHz everytime you shut the computer down.


edit : Err... well, since you've got an Ultra, you probably don't have the 850MHz problem, but you should flash it anyway. :p

02-28-04, 07:38 PM
The biggest benefit from flashin to 5950 is that your will be able to overclock higher.

for example, my 5900nu reached 454/900 before flashing, now my "5950 ultra" can reach 510/1010 without artifacts, altough I keep it at 500/975 just to be safe

By the way I got different results with different 5950 bioses, the asylum5950 ultra bios giving me the best overclockability and stability.

02-28-04, 09:32 PM
The most noticeable difference was the temps when flashing the 5900U to 5950U. It ran cooler with the 5950 bios. I never got around to upping the overclock as 515/950 was just a sweet spot for the card.

02-28-04, 11:02 PM
Make sure you want to do it first. Read about it here: http://forums.guru3d.com/showthread.php?threadid=75483

02-28-04, 11:55 PM
I started the thread about the flicker being back. I haven't tried any other BIOS except the BFG5950u, but the flicker is exactly as it was before the 45.33 drivers.

I might be willing to try another BIOS -- after somebody else does it first of course. :)

I think the flicker issue is probably related to the driver not delivering the 5900u flicker fix because it doesnt think we have 5900's.

02-29-04, 12:42 AM
Originally posted by OWA
I was just reading a semi-related thread in the graphic card section and now I'm a little worried to try it since some are reporting the flicker is back after the flash. I just download several bios files but I guess I'll read the thread you mention and then decide what to do. Also, I'd prefer not to lose my VIVO functionality (even though I'm not really using it) and I guess that's another possibility.

I have a BFG Fx5900 ultra bios flashed with the Evga a380u bios(5950u) running the card at 530/1000 without problems. The VIVO problems with most Fx5900 nu's is because the Non Ultra cards use different hardware for VIVO functions from the Ultra versions. The ultra 5900's and the 5950's seem to use the same thing though. I did read a thread at guru3d where they were able to modify the 5950u bios's to enable VIVO functions on bios flashed fx5900's which were having VIVO problems.

My VIVO still works fine after the bios flash. Watching movies on my Svideo TV-out works great. :) Also, I don't and have never experienced the Flicker problems. Before and after the bios flash and driver updates. My digital 18" Samsung LCD probably has something to do with that. :D

02-29-04, 01:23 AM
Thanks for your input guys, I may flash if I have the bottle to do it. I tried flashing my 5800 Ultra and it screwed it up and I had to RMA the card. Scary stuff... If I do flash my 5900 Ultra I will let you know how it went.

03-02-04, 12:35 PM
You didn't have to RMA your 5800 Ultra, if something ever goes wrong with a video card flash you can always just stick in a PCI video card, boot from it and reflash.

03-02-04, 03:22 PM
Originally posted by particleman
You didn't have to RMA your 5800 Ultra, if something ever goes wrong with a video card flash you can always just stick in a PCI video card, boot from it and reflash.

To tell you the truth im glad I f***ed it up as I HATED the noise from the Gainward 5800 Ultra. Glad I upgraded to the Gainward 5900 Ultra as the noise is MUCH lower.