A 950MHz Athlon will not go very far at all, I wouldn't think even close to 1050MHz, probably barely 1GHz. The reason is because the faster Athlons with higher multipliers can barely go any higher, and a lot of the time are at their limit to begin with. If you want around 950MHz or so, an 850MHz Athlon (Much cheaper) paired with a good heatsink/fan combo, such as the Global Win VOS32($29), should get you in the 935MHz - 952MHz with relatively no problems.