I have a PC with i7-3770K as my main system. I had a Gigabyte EP43-DS3L motherboard with a Celeron 420 CPU, in the CPU support list of the Gigabyte motherboard: http://www.gigabyte.com/support-downloads/cpu-support-p..., you can see that the Pentium 4 520 is written. But there is a little trick they made, which I didn't quite see. They've written with small red letters that N/A = Not support and next to the Pentium 4 520 there's N/A. I got screwed, because who on Earth writes CPUs which ARE NOT supported in a list OF SUPPORTED CPUs! And since it's called a CPU support list, I thought that each and every CPU which is there should be supported and didn't see the tiny red text saying that there are CPUs in this list which have N/A next to them and aren't supported. I wanted to test the Pentium 4 520 on the motherboard for personal reasons, and since now I don't have a motherboard on which to test it on, I will kindly ask you if the P4 520 will be supported by the MSI G41M-P33 Combo, THE P4 520 IS IN THE SUPPORT LIST of the MSI G41M-P33 Combo, but I do not know if MSI also play tricks like Gigabyte (writing unsupported CPUs in their CPU support list). And I don't want to get fooled again and buy something which doesn't support the CPU I want to install on it. I hope you read everything.
More about :msi g41m p33 combo support intel pentium 520
Officially Pentium 4/D support was dropped starting with the Intel 3-series chipsets. Any chipset newer than that, including the G41, does not officially support it. It is up to the motherboard manufacturers as to whether they support it or not.