Lowest overclock on a 1900XT?

[sulanebouxi]

Ok, there's been a few threads about highest overclock but what about lowest? I'm curious as to whether or not anyone has gotten the "bottom of the barrel" batch of XT cards. The reason I ask is because I tried overclocking an XT and I can't even get 650mhz core clock speed without artifacts or a crash. It's very odd. I might be doing something wrong but I may just have a low overclocking card. I've increased the voltage to 1.425 in ATI tool and still no go. So I've settled with 625mhz core and 725mhz memory until I can figure this out.

So, how low have you guys gone?

 

[Munky]

My XT also sucks at OC'ing. Numerous time I've tried to run it stable at XTX speeds, and even with an Accelero cooler, it eventually freezes in a game, so I've settled for stock clocks. With increased voltages I might get better results, but that's not an option for me unless I go watercooling. Still, given that I paid $100 less for 5% less performance, it's not a big deal to me.