From what I have read the OEM/LE 8500 has a lower memory voltage and this limits it's overclocking potential. Apparently you can flash the LE bios to a full retail bios. This will increase the default core/mem clock from 250/250 to 275/275...it will also raise the memory voltage and give you better chances at overclocking. I think I saw one post of someone running at 300/300 but I've read so much techno-blab lately I may be mistaken