Bought in a parts lot, doesn't work because of the scratch on the back of the pcb. Could be used as a donor board or just for the heatsink/fans. From what I can gather the gpu die isn't receiving power because it doesn't even get warm - maybe an issue with power delivery and not to do with the scratch. No heatsink screws, it's just held on by rubber bands. Spring screws are easy to get though. Was originally purchased in China, and yes the warranty is expired.