6800nu overclocking

[CU]

I recently bought a BFG 6800 OC. Coolbits and Rivatuner tell me around 390/760 is my max overclock. That sound pretty good for the gpu but the ram seems alittle lower than average. What do other people get with there 6800nu's? How accurate is Coolbits and Rivatuner at finding the max overclock? I tried FarCry in sm3.0 mode last night at 390/760, but it would exit out when it would almost finish loading the level. I put it back at default speed and it ran fine. I still need to test it some more to see if that what was really causing the problem, but it does appear to be it. Is there a way to find out what speed the ram is rated at without taking off the heatsink? Does increasing the agp voltage on the MB help overclocking any?

 

[cbehnken]

You did nicely on that core. Coolbits fails it's test on my machine at anything over 368/840 .

I have a BFG 6800 OC also. If you want it to go further choose manually overclock and keep pushing until the nvidia test fails, then back down a step. I've never seen artifacts using this method. I think it is a rather conservative test. I wouldn't push the AGP voltage, my brother fried a Geforce 3 by running it at the voltage Tyan told him too; it was higher than nvidia recommended.

Not worth frying a 6800, even if it has a lifetime warranty.

 

[reallyscrued]

im running mine at 1.7 volts....too much? i wonder why its 1.7, isnt agp 8x supposed to be default .8 volts?

 

[Keysplayr]

Originally posted by: reallyscrued
im running mine at 1.7 volts....too much? i wonder why its 1.7, isnt agp 8x supposed to be default .8 volts?

Isn't that why they need molex power?

 

[cbehnken]

They need molex power because the AGP bus cannot provide enough amperage to run the card... Doesn't really have anything to do with voltage. Agp connecters have 12 V, 1.5, .8, etc... That is why you can usually run a 1.5 volt 4x card in an 8 slot

 

[CU]

So if you up the voltage by 0.1 on your 4x agp slot that has an 8x card in it what voltage does it get?