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After installing new CPU my computer wont start

I just got a new AMD Vishera 8 core processor to replace my old amd quad core, they are both AM3+, but whe i try and start my PC with the new processor the power button light on the front of the computer doesnt turn on , but all the fans are going and the motherboard light on. When I switch to my old CPU it works perfectly, any ideas?
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  1. What exact CPU and motherboard are you using?

    You probably need to update the motherboard to the newest BIOS available. Newer cpus usually need newer BIOS to recognize them. The BIOS can be downloaded from your motherboard manufacturer's support website. Instructions to update the BIOS are there too and should also be in your motherboard's manual.
  2. My motherboard is an old Foxconn, but it is am3 compatible, so it probably is just me having to update the bios. My new CPU is AMD FX-8320 Vishera 3.5GHz (4.0GHz Turbo) Socket AM3+ 125W 8-Core
  3. Pull all of your ram sticks out but 1 and see if it'll boot. Also updating the BIOS wouldn't hurt.
  4. CPU and motherboard will be very important information to provide. It could be that you need a BIOS update or in some cases I've seen people install a 125 Watt cpu in a max 95 watt board so it's totally not supported.
  5. Best answer
    dsr1598 said:
    My motherboard is an old Foxconn, but it is am3 compatible, so it probably is just me having to update the bios. My new CPU is AMD FX-8320 Vishera 3.5GHz (4.0GHz Turbo) Socket AM3+ 125W 8-Core

    Well AM3 and AM3+ are different. Some AM3 motherboards got BIOS updates that allowed them to use AM3+ CPUs. You'll need to find your exact motherboard's support page and look at the CPU compatibility list. Make sure the 8320 is on there and then get the newest BIOS and update it using the old cpu.
  6. larkspur said:
    dsr1598 said:
    My motherboard is an old Foxconn, but it is am3 compatible, so it probably is just me having to update the bios. My new CPU is AMD FX-8320 Vishera 3.5GHz (4.0GHz Turbo) Socket AM3+ 125W 8-Core

    Well AM3 and AM3+ are different. Some AM3 motherboards got BIOS updates that allowed them to use AM3+ CPUs. You'll need to find your exact motherboard's support page and look at the CPU compatibility list. Make sure the 8320 is on there and then get the newest BIOS and update it using the old cpu.
    Yea, I need a new motherboard, what is the cheapest AM3+ socket one I can get, because the new processor kinda broke the bank.
  7. Assuming your computer case accepts full ATX, then something like this ASRock 970 Pro3 will do fine: http://www.newegg.com/Product/Product.aspx?Item=N82E16813157364
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