Hardware Secrets
Home | Camera | Case | CE | Cooling | CPU | Input | Memory | Mobile | Motherboard | Networking | Power | Storage | Video | Other
Content
Articles
Editorial
First Look
Gabriel’s Blog
News
Reviews
Tutorials
Main Menu
About Us
Awarded Products
Datasheets
Dictionary
Download
Drivers
Facebook
Links
Manufacturer Finder
Newsletter
RSS Feed
Test Your Skills
Twitter
Newsletter
Subscribe today!
Search
Recommended
Upgrading and Repairing PCs (21st Edition)
Upgrading and Repairing PCs (21st Edition), by Scott Mueller (Que Publishing), starting at $26.75


Home » Motherboard
ASRock Z77 OC Formula Motherboard
Author: Gabriel Torres
Type: First Look Last Updated: September 4, 2012
Page: 2 of 9
Slots

The ASRock Z77 OC Formula comes with two PCI Express 3.0/2.0 x16 slots, one PCI Express 2.0 x16 slot (working at x4), and two PCI Express 2.0 x1 slots.

The two PCI Express 3.0/2.0 x16 slots are controlled by the CPU, with the first slot working at x16 when only one video card is installed, and with both working at x8 when two video cards are installed. Since these slots are controlled by the CPU, they will offer PCI Express 2.0 bandwidth (8 GB/s at x16) when a “Sandy Bridge” CPU is installed, but PCI Express 3.0 bandwidth (16 GB/s at x16) when an “Ivy Bridge” CPU is used.

The third PCI Express x16 slot (PCIE5) is controlled by the chipset, always works at x4 speed, and uses 2.0 bandwidth. You will need a computer case with at least eight expansion slots if you want to install a dual-slot video card in this slot. (Computer cases usually have seven expansion slots.)

The PCI Express x16 slots support both SLI and CrossFireX technologies.

ASRock Z77oc Formula
click to enlarge
Figure 3: Slots

The portrayed motherboard has a series of three switches for you to enable or disable the PCI Express x16 slots. These switches are useful when you have more than one video card installed and you want to check which one is faulty without removing all of them from the computer.

ASRock Z77oc Formula
click to enlarge
Figure 4: PCI Express x16 on/off switches

In order to properly accommodate the additional PCI Express devices that are on this motherboard (the additional SATA and USB 3.0 ports), the board makes use of a PLX PEX8605 switch chip. This chip automatically switches the available PCI Express lanes to the devices that need them. On motherboards with too many PCI Express devices without a switch chip, you need to manually disable devices on the motherboard setup in order to achieve full performance on devices connected to the USB 3.0 and SATA-600 ports when transferring files at the same time.

ASRock Z77oc Formula
click to enlarge
Figure 5: The PLX PEX8605 chip

« Previous |  Page 2 of 9  | Next »
Print Version | Send to Friend | Bookmark Article

Related Content
  • ASRock Z77 Extreme4 Motherboard
  • Gigabyte Z77X-UD3H Motherboard
  • ASRock Z77 Professional Motherboard
  • Gigabyte G1.Sniper M3 Motherboard
  • ASRock Z77E-ITX Motherboard

  • RSSLatest Content
    PNY XLR8 120 GiB SSD Review
    September 10, 2014 - 3:30 PM
    ASRock D1800M Motherboard
    September 8, 2014 - 1:37 PM
    Samsung Chromebook Review
    September 2, 2014 - 6:30 PM
    ASUS H97-PRO GAMER Motherboard
    August 22, 2014 - 2:26 PM
    Kingston HyperX FURY 240 GiB SSD Review
    August 18, 2014 - 2:26 PM
    Cougar MX300 Case Review
    August 7, 2014 - 1:50 PM
    ASUS Z97-DELUXE Motherboard
    August 4, 2014 - 1:08 PM







    2004-14, Hardware Secrets, LLC. All rights reserved.
    Advertising | Legal Information | Privacy Policy
    All times are Pacific Standard Time (PST, GMT -08:00)