Diablo 3 build not working, help?

Ok, i built a budget computer for my friend to play Diablo 3. With looking at system requirements and help from the internet community i came with this build.

Windows 7 Home 64-bit

BIOSTAR A780L3B AM3 AMD 760G Micro ATX AMD Motherboard


LOGISYS Computer CS368RB Red & Black Steel ATX Mid Tower Computer Case 480W Power Supply


XFX HD-667X-ZNFQ Radeon HD 6670 1GB 128-bit DDR3 PCI Express 2.1 x16 HDCP Ready Video Card


AMD Phenom II X2 560 Black Edition Callisto 3.3GHz Socket AM3 80W Dual-Core Desktop Processor HDZ560WFGMBOX


CORSAIR 4GB 240-Pin DDR3 SDRAM DDR3 1333 Desktop Memory Model CMV4GX3M1A1333C9


Used a 640gb Samsung HDD from a previous computer but also order a 320GB WD Caviar Blue

Now everything went well building it, downloaded all windows updates, updated BIOS, Downloaded the Catalyst suite for the Radeon card, and downloaded Diablo 3 to play. Now by specs the game should run on medium settings decently, but it wont. Everything turned down to its lowest settings the game stutters and slows down. Enemy mobs the game slows down to almost a halt... In Act 3 where theirs mortar fire around you slows it down alot. But if theirs not too much going on it will go from slow stuttering to catching up fast. Only for a split second tho.... This is a pulling my hair out moment lol Spec's say yes but game says no... Also changed the case's 480w PSU to an older 650w PSU and no change... Anyone got advice or see something ive missed?

Also i dont believe its the servers b/c for one this has been happening since the game came out. and second my personal computer runs this beautifully. Core i7-920 9GB RAM GTX 260 Win7 64-bit.
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  1. Indeed the specs should be fine from what I've seen. How're your temps?
  2. Use GPU-Z & Windows CPU gadget and monitor if for some reason the GPU or CPU hit 100% (or any other process for that matter, outside of the game)

    A bit of a pain in the butt on a single monitor, but should give you an idea; D3 is VERY light on the CPU, hell, even if it's far from a close comparison, my 2500k rarely ever goes over 26-27% usage in a multiplayer game. My aging 4870s on the other hand hit 80%+ in the thick of it.

    That system should run it fine, something in the background might be hogging resources.
  3. My first thought would be the graphics driver might be giving you issues if you are using the latest version. I have found that the 12.1 driver behaves better if you are having issues with the 12.4 which is the current.

  4. ok here is what we've done. Tried drivers...nothing Every trick/tip that has been posted to fix stuttering in diablo 3...fail. Bought a new EVGA GeForce GTX 550 Ti...same problem. Also the motherboard was fine with 1 stick of 4gb ddr3 1600 but put in another identical one and it will freeze, crash, and not show anything on the tv. So we have RMA'd the mobo and old video card... im asuming it must be the mobo or processor thats at fault.... but we also built 2 of these rigs! and the other one is having the same issues.... so only logical solution is the CPU just wont cut it with that motherboard or wont cut it at all...
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