Last-minute leaks of part numbers hint Apple is about to release both upgraded iMacs and Mac minis on Tuesday — along with an emphasis on larger screens for iMacs and a likely NVIDIA-based design.

French site MacBidouille on Monday detailed new model numbers that appear to confirm AppleInsider's discovery of six new Apple products in resellers' pipelines.

Of these, four models ranging from MB417 through MB420 are described as new iMacs, but with a different system balance than today's lineup: only the first model would have a 20-inch screen, while the remaining four would have 24-inch displays.

In turn, two Mac mini models, the MB463 and MB464, would represent updated low- and high-end versions of Apple's compact desktops.

All four would be available tomorrow and ship almost immediately, according to the claim.

Additionally, Dutch site OneMoreThing — which just earlier today provided a claimed Mac mini box shot — now also claims to have rough details of the systems' specifications.

The iMacs would come with 2.66GHz, 2.93GHz and 3.06GHz Core 2 Duo processors, with 2GB of DDR3 memory for the base model and 4GB for the rest; they would also support up to 8GB of RAM and carry a Mini DisplayPort connector. Mac minis would have the five USB ports, FireWire 800 and Mini DisplayPort as in photos and videos from last month and would start with a 2GHz Core 2 Duo and carry either 1GB or 2GB of memory depending on the model. Hard drives would also start at a minimum 120GB but top out at 320GB.

While such late-breaking claims must always be treated with caution, the details support Apple's own unintentional leaks, which showed NVIDIA-based iMacs and Mac minis that were meant for 2008 but were ultimately pushed into early 2009.

A list of specifications based on model numbers is available below:

iMac

MB417: "Entry-level" 20-inch with 2.66GHz Core 2 Duo, 2GB of RAM

MB418: "Mid-range" 24-inch with 2.66GHz or 2.93GHz Core 2 Duo, 4GB of RAM

MB419: "High-end" 24-inch with 2.93GHz Core 2 Duo, 4GB of RAM

MB420: "Very high-end" 24-inch with 3.06GHz Core 2 Duo, 4GB of RAM

Mac mini