Solved

New CPU isn't working, PLEASE HELP!!!!!

I do allot of gaming. I have been recently upgrading my e machines W3629 computer. So I have upgraded the PSU to 430w the GPU (Nvidia gt 740) and now my processor. My old processor is an Intel Pentium 4 ht 631. The new one I bought is an intel core 2 duo e8400. Both of which are LGA775 sockets. My mother board is an ECS 945gct-m3 ( It came with the computer) Now when i plugged in the new CPU, the computer would start and the fan would go but there would be no display and the blue light (on the power button) wouldn't turn on. I really need some input on this because I really need the new processor for my gaming. Any feedback would be great.

Also I have 2 GB of DDR2 (667Mhz) Ram by Nanya, a 160 GB Sea-gate HDD, and a 1TB western digital HDD (added in), Windows vista on the Sea-gate hard drive, and an added in networking card for Wi-Fi.
9 answers Last reply Best Answer
More about cpu working
  1. Lol a Core 2 Duo in 2014. I dont see that CPU in the supported CPU list: http://www.ecs.com.tw/ECSWebSite/Product/Product_Detail.aspx?DetailID=719&MenuID=1&LanID=0
  2. PandaBear270 said:
    Lol a Core 2 Duo in 2014. I dont see that CPU in the supported CPU list: http://www.ecs.com.tw/ECSWebSite/Product/Product_Detail.aspx?DetailID=719&MenuID=1&LanID=0


    The website says that it supports the latest core 2 duo processors. And yes i know that its sad that im using a core 2 duo in 2014, but it was the best i could get for this mother board. Isnt there anything I can do though? I really need this to work.
  3. Anonymous said:
    PandaBear270 said:
    Lol a Core 2 Duo in 2014. I dont see that CPU in the supported CPU list: http://www.ecs.com.tw/ECSWebSite/Product/Product_Detail.aspx?DetailID=719&MenuID=1&LanID=0


    The website says that it supports the latest core 2 duo processors. And yes i know that its sad that im using a core 2 duo in 2014, but it was the best i could get for this mother board. Isnt there anything I can do though? I really need this to work.




    It seems to me like the CPU simply isnt supported. there are many different iterations of the core 2 duo and your BIOS would probbly need an update to make it work in such an old system. so put your old P4 back in and make sure your bios is updated. if it is then your CPU simply inst supported.

    you might as well have gotten a Q6600 that would have probably worked right out of the box.
  4. It's definitely an unsupported CPU. That's also the behavior you'll get with a CPU that fits a socket but is unsupported, so it's not a case of a CPU not being officially supported that will still work, as is sometimes the case.

    There are still used Core2Duo x6800s floating around, if you're determined to have some kind of upgrade, that's probably the best one you can get. I wouldn't recommend, however, putting any more money into what is a very old PC at this point.
  5. Anonymous said:
    I do allot of gaming. I have been recently upgrading my e machines W3629 computer. So I have upgraded the PSU to 430w the GPU (Nvidia gt 740) and now my processor. My old processor is an Intel Pentium 4 ht 631. The new one I bought is an intel core 2 duo e8400. Both of which are LGA775 sockets. My mother board is an ECS 945gct-m3 ( It came with the computer) Now when i plugged in the new CPU, the computer would start and the fan would go but there would be no display and the blue light (on the power button) wouldn't turn on. I really need some input on this because I really need the new processor for my gaming. Any feedback would be great.

    Also I have 2 GB of DDR2 (667Mhz) Ram by Nanya, a 160 GB Sea-gate HDD, and a 1TB western digital HDD (added in), Windows vista on the Sea-gate hard drive, and an added in networking card for Wi-Fi.


    How much did you spend on this?
  6. Best answer
    Even if you updated your motherboard's BIOS to the latest version, you still won't be able to accept the E8400 unfortunately. To simply state, you cannot accept the E8400 as it is an incompatible CPU. I am sorry to be the bearer of bad news.

    If possible, I would refund the E8400 and get your money back. You can purchase an alternative Core 2 Duo which is compatible with your motherboard; you can find your motherboard's supported CPU list here.

    To be honest I wouldn't bother with a Core 2 Duo CPU and your P4 is ancient; either CPU will bottleneck your GPU and you won't get the best performance out of it. Depending on your budget however, I'd replace your motherboard and purchase a cheap modern CPU; even the Haswell Celeron (cheapest modern CPU) is a major upgrade over your P4 or C2D. If you're willing to replace your motherboard, you'll also need to replace your RAM to DDR3; please state your budget (or the amount you're willing to spend) and I'll provide you a decent upgrade within your price range.

    The upgrade I will suggest will provide you a much better performance upgrade over your current system. You should still use your current components, only replacing motherboard, CPU and RAM. Please may I ask what PSU do you have? Which manufacturer and watts?

    Thank you sincerely. :)
  7. Obnoxious said:
    Even if you updated your motherboard's BIOS to the latest version, you still won't be able to accept the E8400 unfortunately. To simply state, you cannot accept the E8400 as it is an incompatible CPU. I am sorry to be the bearer of bad news.

    If possible, I would refund the E8400 and get your money back. You can purchase an alternative Core 2 Duo which is compatible with your motherboard; you can find your motherboard's supported CPU list here.

    To be honest I wouldn't bother with a Core 2 Duo CPU and your P4 is ancient; either CPU will bottleneck your GPU and you won't get the best performance out of it. Depending on your budget however, I'd replace your motherboard and purchase a cheap modern CPU; even the Haswell Celeron (cheapest modern CPU) is a major upgrade over your P4 or C2D. If you're willing to replace your motherboard, you'll also need to replace your RAM to DDR3; please state your budget (or the amount you're willing to spend) and I'll provide you a decent upgrade within your price range.

    The upgrade I will suggest will provide you a much better performance upgrade over your current system. You should still use your current components, only replacing motherboard, CPU and RAM. Please may I ask what PSU do you have? Which manufacturer and watts?

    Thank you sincerely. :)


    Okay. Let me just start off by saying that I am only 14 years old and I am doing the best I can to get the system up and running the way I would like it for gaming, so I don't have much of a budget. I committed to this computer because It was an old emachines computer and I wanted to turn it into something better, and ive been doing pretty good so far until I ran into this CPU problem. Once I got this graphics card ($115) my CPU was bootlegging it, so I bought the C2D off of eBay. I think I am just going to buy a new mother board off of eBay, because you can find some pretty good deals. I appreciate all of the help everyone has given me, I really do appreciate it. If you do want to know, have a Thermal Take 430. And I do plan on doing some upgrades in the future. Sorry for replying so late but I had other things. But once again I do appreciate all of the help. I did know that upgrading an emachines was going to be difficult due to the poor quality of their products but im using it as a learning experience mainly.
  8. theonerm2 said:
    Anonymous said:
    I do allot of gaming. I have been recently upgrading my e machines W3629 computer. So I have upgraded the PSU to 430w the GPU (Nvidia gt 740) and now my processor. My old processor is an Intel Pentium 4 ht 631. The new one I bought is an intel core 2 duo e8400. Both of which are LGA775 sockets. My mother board is an ECS 945gct-m3 ( It came with the computer) Now when i plugged in the new CPU, the computer would start and the fan would go but there would be no display and the blue light (on the power button) wouldn't turn on. I really need some input on this because I really need the new processor for my gaming. Any feedback would be great.

    Also I have 2 GB of DDR2 (667Mhz) Ram by Nanya, a 160 GB Sea-gate HDD, and a 1TB western digital HDD (added in), Windows vista on the Sea-gate hard drive, and an added in networking card for Wi-Fi.


    How much did you spend on this?


    I spent 115 on the graphics card, about 40 on the power supply, I got the 1TB hard drive for free, and the networking card and the original configuration of the emachines computer with oddly enough an extra 1GB of Ram that somehow came with the computer:
    https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0CB0QFjAA&url=http%3A%2F%2Fwww.newegg.com%2FProduct%2FProduct.aspx%3FItem%3DN82E16883114058&ei=W6DCU5aOKI60yATi5oDYBA&usg=AFQjCNH_100_J8fKIttTQUg4IrM4luxFmg&sig2=c37QiVThDhrlo1qWzLmJvg&bvm=bv.70810081,d.aWw
  9. DSzymborski said:
    It's definitely an unsupported CPU. That's also the behavior you'll get with a CPU that fits a socket but is unsupported, so it's not a case of a CPU not being officially supported that will still work, as is sometimes the case.

    There are still used Core2Duo x6800s floating around, if you're determined to have some kind of upgrade, that's probably the best one you can get. I wouldn't recommend, however, putting any more money into what is a very old PC at this point.


    I plan on upgrading the Ram and the motherboard along with the CPU sometime soon, but I think im just going to buy a new motherboard off of eBay, thanks for the help though.
Ask a new question

Read More

CPUs Motherboards Intel