5770 Overclock failure

I've used Evga precision on different Nvidia cards. I don't think it'll work on an ATI though. As you can see here EVGA | EVGA Precision | EVGA Precision If your card won't handle the slighest overclock I would suspect it is a card the just met the requirements listed in the specs. JMO.Fabe

By chance, have you tried the Overdrive tool within Catalyst?

Just for comparison, I have an XFX 5770 and 5750 in CrossfireX.

The 5770 is oc'd to 950/1400 and the 5750 is 870/1350--no negative issues. I have not tried MSI Afterburner. Speaking of which, you don't have Overdrive and Afterburner trying to both overclock the card at the same time, do you?

Not every single chip overclocks the same. Yours might just be close to it's max as it is and gets unstable when pushed in the least.

pparks1 said:

Not every single chip overclocks the same. Yours might just be close to it's max as it is and gets unstable when pushed in the least.

I agree could be a chip that just made the grade to clock at advertised speed. Fabe

pparks1 said:

Not every single chip overclocks the same. Yours might just be close to it's max as it is and gets unstable when pushed in the least.

thefabe said:

I agree could be a chip that just made the grade to clock at advertised speed. Fabe

morrowmedia said:

Yea, if I even go 5mhz higher on the core or memory, the screen starts to flicker...I'm not all that interested in overclocking, just thought it would be fun to try. Guess I will have to say nae for this one. Thanks for the input.

First off, I totally agree with pparks1 and thefabe, but flickering at the increase of 5MHz? That don't sound right. Prior to using Afterburner, did you ever try to oc with Overdrive to see what the result would be?

I also see the usual pre-requisite questions have been overlooked:
-Are the mobo chipset drivers up to date?
-Is CCC and Display driver the latest version?
-Do you have a power supply that is rated to handle the card?

Are you doing anything with voltages either?