to flash, or not to flash

[Xero (1)ne]

alright, i got an old card as some of you might remember, and i was wondering if i should flash the bios?
tweaked rivers, overclocking still leave fear in the old days.
ive heard it unlocks new features, and increases performance, but the problem is finding teh bios(nvidia and xfx dont like the idea). i flashed my mobo bios and i have seen better stability because of it, now im curious of video, if any of you can help it would be greatly appreciated

Nvidia XFX GeForce FX 5200 256MB bios version:4.34.20.27
IRQ:16 bus:AGP 8x tv encoder type:integrated(mv)

i have had NO luck finding anything, is it hopeless? are the big companies screwing us over even though our cards can do more?

[Vaerilis]

There are no new features or pipelines on FX series cards to be unlocked via BIOS flashng.
A lot of FX5200 cards can overclock relatively well, there isn't really a need for a new BIOS with higher core and memory voltages or tighter memory timings. How far did you manage to get with your card?