Hi All, Aim I'm looking at building an overclocked gaming build (my first ever build). Looking to overclock the i7 920 DO processor to 4Ghz and have it run stable with cooling sufficient to make it not go over 80 degrees under load. Oh and to be 'reasonably' quiet. I plan to run Windows 7 Professional 64-bit. I will list the parts I have in mind and would appreciate your feedback on my set up and any issues I might have with them. Parts Computer Case - Antec 900 Motherboard - Gigabyte GA-X58A-UD3R CPU - Intel Core i7 920 D0 2.66Ghz Socket 1366 retail (Nehalem) CPU Cooler - Noctua NH-D14 (EDIT: Confirmed. It DOES fit inside the Antec 300: http://www.eggxpert.com/forums/thread/620025.aspx ) OR Scythe Mugen 2 rev.B RAM - OCZ XTC 6GB (3x2GB) DDR3 1600Mhz CL8(8-8-8-20) Graphics Card - ATI XFX 5850 - comes with lifetime warranty Monitor - 24 LG W2452XT (Aspect Ratio 16:10, resolution 1920x1200) Hard Drive - Western Digital WD10EALS 1TB Power Unit - Thermaltake 700W ToughPower PSU Concerns EDIT: The following bits may/may not be relevent having edited the parts above, but will leave here for anyone in same position as me - Would the Noctua be sufficient cooling to run the overclocked i7? The Antec 300 case has room for an additional side fan to cool the graphics card, would it be needed? - Is 800W enough power for what I am aiming for? - Is the ASUS branded ATI 5850 worth the extra money? - The Antec 300 has room for a side fan which can cool the graphics card, would it be necessary? If so I have been looking at the Scythe Gentle Typhoons. - Is my motherboard a good choice? My rig is expensive enough as it is so I would like to stick to either Gigabyte GA-X58A-UD3R or the ASUS P6T SE (I'm not a fan of SLI so that does not bother me) I welcome any feedback and advice from you knowledgeable people.