Huge Benchmark range

I get it that the mobo and ram could affect a cpu benchmark but I was looking at an AMD Athlon II X4 631 Quad-Core for a build for my kid because had it at 4219 and only $69; putting it near an Intel Core i3-2120 @ 3.30GHz for $40 less. Then I looked at cpu world and saw the same processors at 2512 and 2052 for the amd and intel respectively. To make it more confusing the same intel chip had a benchmark of 1115 with a different mb, ram and vid.

Why the huge variation? How can I figure out what mb will allow the cpu to perform it's best?
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  1. Maybe some of the cpus are overclocked. That would explain the difference.

    In general, once the memory controller(and pci-e controller) moved into the cpu, the performance from board to board was within single digit % of each other at stock speeds.

    It is nice to collect all this info, but i am not sure how accurate it is over time.

    What is your system going to be used for?
  2. Best answer
    Because PassMark (what uses) is a complete joke. Never trust those scores.

    Here ya go. Much more reliable benches. Athlon II X4 630 compared to an i3 2100

    The i3 is generally much better (with a couple exceptions).
  3. Thanks for the info and excellent reference.

    My 7 year old son is playing low end video games like Roblox and Minecraft. Rigth now he is using a Dell Inspiron 531s that is about 6 years old. It has a Sempron 2600+ 2.0 GHz CPU, GeForce 9400 vid card, and 4 GB of RAM.
    What I'm trying to do is build him a budget system that he can use and also I was thinking I would integrate some components that I might try to use on the next good rig; like the case, psu, ram and vid card.

    Here is a link to my thread 'First Build' in Home Built Systems.

    Thanks much.
  4. Generally speaking a Core i3-2100 can beat more expensive AMD Phenom II X4 CPUs in games. Therefore, going with a Core i3 should be your starting point.
  5. Best answer selected by Jetson.
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