Something interesting with AGP voltages.

[Korporativ]

So... i've noticed lately that if I up the voltage of the AGP slot to 1.6v and keep my card overclocked to where it was stable without artifacts at 1.5v, it artifacts. However, once I turn the clock speeds down and stop getting the artifacting, it runs faster than the 1.5v.

BFG 6800OC
roughly:
16x6
405 clock
870 memory
1.5v
vs.
16x6
390 clock
855 memory
1.6v

The 1.6v is smoother under load, and seems to be faster. Anyone have input on that? Not to mention that i'd think i'd have LESS artifacting with the higher voltage. *shrug*

 

[vmrao]

I've experienced the same thing with my Radeon 9800PRO

 

[Killrose]

You were possibly getting artifacts durring your benching with 1.5v and overclock that was not being noticed, but was actually slowing the card down maybe and it affected your avereage framerate by lowering it?

Now with more voltage and a less agressive overclock, you have raised the avereage framerate (especially the lows) giving more performance overall. Maybe durring the most stressfull parts of the benchmark it actually benifits from higher voltage to the core.

I would further guess, that durring the most stressfull part of the test, with your higher overclock settings, that the combination of higher voltage and stress caused more heat which= artifacting.

I really have no idea 😛