Tech ARP - EXT-P2P's Discard Time

			Desktop Graphics Card Comparison Guide Rev. 33.0 Covering 628 desktop graphics cards, this comprehensive comparison allows you ... Read here

			BIOS Option Of The Week - Virtualization Technology Since 1999, we have been developing the BIOS Optimization Guide, affectionately known... Read here


		Explain these bad grades! (1 replies) ED#219 : Intel & Microsoft Encou... (0 replies) BIOSTAR Introduces The BIOSTAR Hi-Fi... (0 replies) ED#218 : Ransomware 101 With Trend Micro (0 replies) Samsung Comes Full Circle with Intro... (0 replies) Microsoft : First Major Update for W... (0 replies) Dell Introduces Hybrid Cloud System (0 replies) Playing pre-owned games for consoles... (2 replies) HDMI to VGA adapter (3 replies) Tiny NVIDIA Supercomputer to Bring A... (0 replies)


Buy The BOG Book	Subscribe To The BOG!	Latest Money Savers!

EXT-P2P's Discard Time

Common Options : 3.8µs, 9.6 µs, 30µs, 1ms

Quick Review

A bug in the NVIDIA nForce2's PCI-to-PCI bridge controller causes data corruption when copying data between the integrated IDE controller and the external SATA controller. The EXT-P2P's Discard Time BIOS feature is used to circumvent this bug by giving the IDE and SATA controllers more time to complete their transactions.

When set to 3.8µs, the IDE/SATA controller has to complete its read transaction within 3.8µs, or it will be discarded in favour of the next read request.

When set to 9.6µs, the IDE/SATA controller has to complete its read transaction within 9.6µs, or it will be discarded in favour of the next read request.

When set to 30µs, the IDE/SATA controller has to complete its read transaction within 30µs, or it will be discarded in favour of the next read request.

When set to 1ms, the IDE/SATA controller has to complete its read transaction within 1ms, or it will be discarded in favour of the next read request.

If you are using Serial ATA hard drives, you should set this BIOS feature to 30µs. This should be more than enough time for most IDE/SATA controllers to complete their transactions. Although it is possible to use a shorter discard time with some hard drives, the risk of data corruption offsets the gain in performance.

Because of differences in trace lengths and SATA controllers, some motherboards may require a longer discard time. If you are still facing data corruption issues, increase the discard time to 1ms (1000µs). But this is not recommended as it reduces the transfer rate between the IDE/SATA controllers.

If you are not using any Serial ATA hard drives, or use only Serial ATA hard drives; this BIOS feature will not have any effect. This is because there cannot be any PCI-to-PCI transfers between the IDE controller and the SATA controller if you only use IDE hard drives or SATA hard drives but not both. That is why this BIOS feature is grayed out whenever the SATA controller is disabled.

If you like this article, please share it! ->

Support Tech ARP!

If you like our work, you can help support out work by visiting our sponsors, participate in the Tech ARP Forums, or even donate to our fund. Any help you can render is greatly appreciated!

*Support us by buying from Amazon.com!*

Grab a FREE 30-day trial of Amazon Prime for free shipping, instant access to 40,000 movies and TV episodes and the Kindle Owners' Lending Library!

If you like to know more about this and other BIOS settings, why not subscribe to the full BIOS Optimization Guide?
Click here to find out how you can do that now!

Links: Discuss BIOS options here in our forums | Back to the list of BIOS options