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How To Unlock The Overclocking Lock

Intel Stakes Its Vision of the PC Future with 775 Launch
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With the chipset's A stepping, a register could be used to remove the overclocking lock. The current stepping (B1), however, does not allow for the 'feature' to be disabled any more.

However, we know of two motherboard makers that have already managed to override the overclocking limiter successfully: Asus and Gigabyte. And it isn't really difficult, but it's a shame to think that smaller manufacturers simply don't have enough manpower make such a venture possible.

Usually, the PLL is initialized at system startup in order to lock the frequency that is stored in BIOS. Here's where we need to start, since it won't lock frequencies that exceed the internal limiter. Intel accomplished this by linking the PLL to the assertion time of the Northbridge reset signal.

After adding a little hardware modification, the two companies mentioned above managed to pass control over the PLL ready time to the BIOS. Each frequency has a different PLL locking time that the BIOS software needs to be aware of. Based on that information, the BIOS will now adjust the period of time the system remains in reset mode until the PLL successfully locks the clock.

New Memory: DDR2-533


Dual DDR2-533 will be the memory to go with until Intel adds the 925XE chipset in Q3. Different from our original estimation, the next generation DDR2 at 333 MHz (DDR2-667) will be available very soon, even before the platforms will be available to support it.

Summary
  1. Intel's 775 Launch Mixes Ambition With A Strong Aftertaste
  2. First Contact
  3. Obstacles And Hurdles
  4. More Findings
  5. New Socket: LGA 775
  6. LGA 775 Processor Installation
  7. LGA 775 Processor Installation, Continued
  8. LGA 775 Processor Installation, Continued
  9. MSI's CPU Installation Tool
  10. Transitional Products
  11. Poor Thing: Intel Reference Cooler
  12. New Processors: P4 Prescott Up To 3.6 GHz
  13. Specification Overview
  14. Model And Pricing Information
  15. Processor Overview
  16. New Chipsets: 925X, 915G, 915P, 915GV
  17. New Chipsets: 925X, 915G, 915P, 915GV, Continued
  18. 925X Express Chipset
  19. 915G Express Chipset
  20. 915G Express Chipset, Continued
  21. 915G Express Chipset, Continued
  22. 915P Express Chipset
  23. Chipset Devices
  24. Intel Puts The Lock On Overclocking
  25. How To Unlock The Overclocking Lock
  26. New Memory: DDR2-533, Continued
  27. DDR2 Memory Vendors
  28. Intel Flex Memory Technology
  29. New Interlink: PCI Express
  30. More SATA, More RAID, More Ports
  31. Matrix RAID
  32. Creating A RAID Array
  33. More HD Performance For Free: Command Queuing
  34. More Networking: Intel Wireless Connect Technology
  35. New Audio: High Definition Audio
  36. Asus P5AD2 Premium
  37. Foxconn 925A01
  38. Test Setup
  39. Benchmarks And Settings
  40. Platform Benchmarks
  41. DirectX 8 Benchmarks
  42. DirectX 8 Benchmarks, Continued
  43. DirectX 9 Benchmarks, Continued
  44. Video Benchmarks
  45. Video Benchmarks, Continued
  46. Application Benchmarks
  47. Application Benchmarks, Continued
  48. Synthetic Benchmarks
  49. Synthetic Benchmarks, Continued
  50. Processor Power Consumption
  51. Integrated Graphics Benchmarks
  52. Game Benchmarks
  53. Halo
  54. Far Cry
  55. Video Performance
  56. Networking Benchmarks
  57. Storage Subsystem Benchmarks
  58. Conclusion
  59. A Final Note
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