I need some tips on my system rebuild, I am a skilled modder/ repairer but this is my first motherboard/cpu replace. I have seen many northbridge types listed when looking for motherboards but no mention of what northbridge type the processor is when looking at it. I am NOT dropping my OS I intend to get the mobo, gpu and ram up and bring the os up before cloning it to the replacement hdd. Also the mobo I am about to list states it's dual channel memory but so is my current mobo and it has four cards, so which is better four or two? This PC is regularly used for watching videos and movies, and playing games.will be switching from console gaming with bethesda games to pc permanently. Trying to keep the rebuild under $1300 tops, not accounting for extended warranties however. Yes Reusing all stock parts that I am not replacing (will be posting replacements below) Only accessories I am adding are a BT dongle, and Micro usb adapter for turtle beach x5 and using PS3 controller on pc. No parts purchased as of yet, better to be patient and plan it out that rush in and srew something up. Currently running Win Vista x64, and I will not up to win 7. Have found a couple aftermarket cpu coolers but unsure which would be best to use, I do like the blue led on the zalman but lighting isn't important as cooling. Parts Below: ZALMAN CNPS9900MAX-B 135mm Long life bearing CPU Cooler Blue LED or COOLER MASTER Hyper 212 EVO RR-212E-20PK-R2 Continuous Direct Contact 120mm Sleeve CPU Cooler Compatible with latest Intel 2011/1366/1155 and AMD FM1/AM3+ Intel Core i5-2500K Sandy Bridge 3.3GHz (3.7GHz Turbo Boost) LGA 1155 95W Quad-Core Desktop Processor Intel HD Graphics 3000 BX80623I52500K ASUS ENGTX570 DCII/2DIS/1280MD5 GeForce GTX 570 (Fermi) 1280MB 320-bit GDDR5 PCI Express 2.0 x16 HDCP Ready SLI Support Video Card CORSAIR Gaming Series GS800 800W ATX12V v2.3 SLI Ready CrossFire Ready 80 PLUS Certified Active PFC High Performance Power Supply ASUS P8Z68-V PRO/GEN3 LGA 1155 Intel Z68 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard with UEFI BIOS CORSAIR Vengeance 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model CMZ8GX3M2A1600C9B or CORSAIR Vengeance 16GB (4 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model CMZ16GX3M4A1600C9 Want to make a note I forgot, I would love to get ahold of a new case if Asus has released it, unsure of it's exact name but it is on the CG8490 model desktop they announced in 2010. I have done some research and found that on a dual channel system running four sticks actually increases the latency due to increased load on the bus. Solved that question. SO in continuing the question strand, How can I be certain that the northbridge type is the right one for processor? Which Cpu heatsink will perform better/fit better for this rebuild/upgrade? And lastly are there any compatibility issues I might have missed?