Two websites World of Apple and My Apple Guide have posted that Apple is planning to hold an event on March 24 to unveil new desktop hardware. Both website say that their sources believe we will see the new iMac, Mac mini and Mac Pro at the event. My Apple Guide further claims that both mini and iMac will use NVIDIA’s chipset, whereas the Pro will get the new Xeon processors.

Hardmac has posted a rumor contradicting the March 24th release date of iMac and Mac mini. According the website iMac and mini will be released tomorrow and to support their claim they have posted product numbers for upcoming models. There will be four iMac models MB417 20-inch entry-level model, MB418 24-inch mass-market model, MB419 24-inch high-end model and MB420 24-inch ultimate model. On the mini’s side there will be two models MB463 entry-level model and MB464 high-end model.

OneMoreThing.nl supports Hardmac’s claims and have released specification of iMac and Mac mini models that will be released tomorrow. The Mac mini will come with 5 USB ports, one FireWire 800, mini DVI, mini Displayport, NVIDIA chipset, 2.0GHz Intel Core 2 Duo, 2GB RAM and 120GB hard drive. The iMac will have one 20-inch model and three 24-inch models. It will use Intel Core 2 Duo 2.66GHz, 2.93GHz and 3.06GHz processor with 2GB RAM for 20-inch model and 4GB RAM for 24-inch models. iMac will also have DisplayPort support.

We have no idea which one of the above two rumors will come true, but we known this that we will see the new desktop models very soon. Within next 18 hours we will known for sure whether the second rumor is true or not, and we will have to wait few more days to confirm the first rumors. Also, an image of Mac mini’s packaging has been leaked. The image shows the back of mini on the packaging with WiFi, iLife and NVIDIA chipset symbols.

In other Apple news, AppleInsider is reporting that Apple will introduce new Time Capsule and Airport Extreme soon. Their information is based on regulatory filings that Apple made for the two upcoming devices with Federal Communications Commission (FCC). Apple filed for a new Airport Express device in January and was granted FCC approval today, whereas the Time Capsule filing was done in August 2008 and it was also granted today. AppleInsider notes that new Apple products are released within days after FCC approval is granted. Additionally, recent discount on Time Capsule models on Amazon are also an indication that new models are coming soon.