Needs to be checked.
Needs to be checked.
Your system runs an i5 2400 and needs a compatible CPU with i5 2400 support. The motherboard must also handle that voltage. A suitable option would be an i5 2400 or similar model that matches the voltage requirements.
Without a BIOS update, the top CPU would likely be the 2600. If the manufacturer released an update to support Ivy Bridge, then the 3770 would become the best option.
You should consider upgrading to a higher-end CPU like an i5-7600 or better for better performance.
As mentioned earlier, without a BIOS release. 2600 would require an update to 3770. An R5 1600 wouldn't fit. This is PGA and the LGA socket type is different.