By AppleInsider Staff

Published: 08:30 AM EST

In unusual move early Thursday morning, Apple quietly rolled out updates to its 13-inch MacBook notebook line and also began offering customers an option to custom configure new MacBook Pro orders with a 2.6GHz Core 2 Duo chip.

The updates came without a formal announcement and instead began appearing on the company's online store in the early morning hours.

The new 13-inch MacBooks now share the same Santa Rosa-based architecture as their professional cousins, the MacBook Pros, including an 800MHz frontside bus. They also sport Intel's GMA X3100 integrated graphics video chip.

At the same time, Apple also began offering customers the ability to upgrade its 15- and 17-inch MacBook Pro notebooks with a 2.6GHz Core 2 Duo chip (+$250) and 250GB Serial ATA Drive (+ $150/$225)

Pricing & Availability

The new MacBook models are now shipping and will be available through the Apple Store, Apple’s retail stores and Apple Authorized Resellers.

2.0GHz 13-inch MacBook (white)

• 2.0GHz Intel Core 2 Duo
• 1GB memory
• 80GB hard drive
• Intel GMA X3100 w/ 144MB of DDR2 SDRAM
• Combo drive
• $1,099.00

2.2GHz 13-inch MacBook (white)

• 2.2GHz Intel Core 2 Duo
• 1GB memory
• 120GB hard drive
• Intel GMA X3100 w/ 144MB of DDR2 SDRAM
• Double-layer SuperDrive
• $1,299.00

2.2GHz 13-inch MacBook (black)

• 2.2GHz Intel Core 2 Duo
• 1GB memory
• 160GB hard drive
• Intel GMA X3100 w/ 144MB of DDR2 SDRAM
• Double-layer SuperDrive
• $1,499.00