Shares of Apple Inc. rose Tuesday after the company announced two new products , the Xserve server and the new Mac Pro computer, one week ahead of the Macworld Expo in San Francisco.

Apple shares had risen by $1.05 to $178.69 at 12:05 p.m.

The new Mac Pro combines two of Intel's new 45 nanometer Quad-Core Xeon processors which run up to 3.2 GHz, up to 4TB of internal storage and new graphics. The Xserve starts shipping Tuesday, the company said, and has a retail price of $2,999.

Other improvements for the PC include 2GB (2x1GB) of RAM standard, PCIe 2.0 slots, built-in Bluetooth standard, and an ATI Radeon HD 2600 XT video card with 256MB of memory and two dual-link DVI ports.

The new Xserve, also available on Tuesday, retails at $2,999 and has up to two Quad-Core 3.0 GHz Intel Xeon processors for 8-core performance. The Xserve also includes a new server architecture, faster front side buses, faster memory, up to 3TB of internal storage and two PCI Express 2.0 expansion slots.

The 23rd MacWorld Expo will take place from January 14 to 18 in San Francisco.