I had a friend send me and an NVIDIA 6800 Series OEM PCI Express for free. The problem is that since it's an OEM there are no manufacturer markings at all. I'm pretty sure it's a 6800GTO because RivaTuner detects the default memory and core clock frequencies at 350/900. According to NVIDIA's website, these are the default speeds for the 6800GTO. Does anyone know how to determine how many pipes are unlocked? I am just trying to make sure what I've got before I start to OC it. The GTO has 12 and GT has 16. If anyone has any other ideas how to determine which card this is, I would greatly appreciate it.