L2 Cache Ecc Error
Contact Advertise Advanced Search Forum Hardware CPUs AMD CPUs CPU L2 Cache ECC error checking If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. Welcome to OCF! Join us to comment and to customize your site experience! Members have access to different forum appearance options, and many more functions. As of May 1, an ISP/EDU email is NO longer required to access the Classifieds. For more information or to gain access, visit Classified Access Rules Change thread. (100 quality posts and 30-day minimum membership are still required) Results 1 to 8 of 8 Thread: CPU L2 Cache ECC error checking Tweet Thread Tools Show Printable Version Subscribe to this Thread… Search Thread Advanced Search 10-10-02,06:22 PM #1 youngbuck View Profile View Forum Posts Member Join Date Aug 2002 Location CO, USA CPU L2 Cache ECC error checking I remember reading in an OC'ing guide that this should be disabled. It seems logical that it might make it faster since it is less work the CPU has to do. -YB Reply With Quote 10-10-02,06:27 PM #2 donny_paycheck View Profile View Forum Posts Inactive Super Quad Mod Join Date Oct 2001 ECC slows down any memory acces, so mine is disabled. I don't have a benchmark to support this as a good idea. Hopefully somebody else here does. Core i7 920 @ 4 GHz, 1.35v Corsair Nautilus 500 w/DD BIX radiator swap & Apogee GTX Asus P6T 6GB Corsair Dominator XFX GeForce GTX 285 WD Raptor 150GB / Hitachi 1TB Antec P182 / PCP&C Silencer 750 Samsung 2232GW Sic vis pacem, para bellum. Reply With Quote 10-10-02,06:28 PM #3 diehrd View Profile View Forum Posts Visit Homepage Senior SMP Gawd Join Date Jan 2001 Location NY ECC will slow down the ram but also know if you have nonEcc you have nothing to worry about as you cannot set it any ways...... . Reply With Quote 10-10-02,06:39 PM #4 youngbuck View Profile View Forum Posts Member Join Date Aug 2002 Location CO, USA diehrd, I'm talking about CPU ECC here, not RAM ECC. -YB Reply With Quote 10-10-02,08:38 PM #5 OC Detective View Profile View Forum Posts Member Join Date Jul 2001 Location Mauritius Extracted from www.rojakpot.com Enabling this feature is r
detects, handles, reports, and corrects cache memory errors. Memory errors detected with parity or ECC have Fault Status Register (FSR) values to distinguish them from other abort causes.This section describes:Error build optionsAddress decoder faultsHandling cache parity errorsHandling cache ECC errorsErrors on instruction cache readErrors on data cache readErrors on data cache writeErrors on evictionsErrors on cache maintenance operations.Error build optionsThe caches can detect and correct errors depending on the build options used in the implementation. The build options for the instruction cache can be different to the data cache.If the parity build option is enabled, the cache is protected by parity bits. For both the instruction and data cache, the data RAMs include one parity bit per byte http://www.overclockers.com/forums/showthread.php/129267-CPU-L2-Cache-ECC-error-checking of data. The tag RAM contains one parity bit to cover the tag and valid bit.If the ECC build option is enabled:The instruction cache is protected by a 64-bit ECC scheme. The data RAMs include eight bits of ECC code for every 64 bits of data. The tag RAMs include seven bits of ECC code to cover the tag and valid bit.The data cache is protected by a 32-bit ECC scheme. The data http://infocenter.arm.com/help/topic/com.arm.doc.ddi0363g/Chdgfjac.html RAMs include seven bits of ECC code for every 32 bits of data. The tag RAMs include seven bits of ECC code to cover the tag and valid bit. The dirty RAM includes four bits of ECC to cover the dirty bit and the two outer attributes bits of each cache line.Address decoder faultsThe error detection schemes described in this section provide protection against errors that occur in the data stored in the cache RAMs. Each RAM normally includes a decoder that enables access to that data and, if an error occurs in this logic, it is not normally detected by these error detection schemes. The processor includes features that enable it to detect some address decoder faults. If you are implementing the processor and require these features, contact ARM to discuss the features and your requirements.Handling cache parity errorsTable 8.2 shows the behavior of the processor on a cache parity error, depending on bits [5:3] of the ACTLR, see c1, Auxiliary Control Register. Table 8.2. Cache parity error behaviorValueBehaviorb000Generate abort on parity errors[a], force write-through, enable hardware recoveryb001b010b011Reservedb100Disable parity checkingb101Do not generate abort on parity errors, force write-through, enable hardware recoveryb110b111Reserved[a] Parity errors caused by ACP coherency maintenance operations do not generate abortsSee Disabling or enabling error checking for information on how to safely change these bits.Hardware re
Windows 8.1 Update Windows 8 & 8.1 Tutorial Troubleshooting L2 Cache MemoryTutorial Home>PC Hardware>Computer Basics>PC Upgrade, Troubleshooting and Repair>Troubleshooting CPUs>Troubleshooting L2 Cache Memory Step 1:Understanding CPU CacheADVANCED https://panam.gateway.com/s/tutorials/Tu_949704.shtml TUTORIAL: This is an advanced tutorial. The following steps should only be performed by an advanced user. Improper or accidental changes to the system BIOS could permanently damage your system.Cache http://archive.techarp.com/showFreeBOGe6f9.html?lang=0&bogno=11 memory holds a copy of the most recently-read RAM addresses, enabling the processor to access the same information again without fetching it from main memory. Modern processors have at l2 cache least two kinds of memory cache, Level 1 (L1) and Level 2 (L2) cache. L1 cache is built into the processor die. L2 cache was originally found on the motherboard, but later became part of slot-based processor assemblies and is now part of the CPU itself. L2 cache is 128KB to 512KB in size, much larger than L1 cache. Step l2 cache ecc 2:Significance of L2 Cache Errors When the processor needs information, it checks L1 cache, then L2 cache. It goes to main memory only if neither cache holds the desired information. Because L2 cache holds a large number of RAM addresses, an L2 cache failure is serious. It corrupts data, meaning that the CPU can no longer access memory reliably unless L2 cache is disabled. Disabling L2 cache causes a huge slowdown in performance. Because L2 cache is built into the CPU, an L2 cache error that's confirmed means that you need to replace your CPU. Step 3:Detecting L2 Cache ErrorsHere are some of the ways that an L2 cache error can be reported. Systems with the AMI BIOS use 11 short beeps to report an L2 cache error detected at boot time. Windows XP displays a 0x2E DATA_BUS_ERROR (blue screen) error if L2 cache, main memory, video memory or other problems take place. 0x50 PAGE_FAULT_IN_NONPAGED_AREA can also indicate defective L2 or main memory or other types of hardware or software problems. 0x218 UNKNOWN_HARD_AREA can be triggered by defectiv
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! CPU L2 Cache ECC Checking Common Options : Enabled, Disabled Quick Review This BIOS feature enables or disables the L2 (Level 2 or Secondary) cache's ECC (Error Checking and Correction) function, if available. Enabling this feature is recommended because it will detect and correct single-bit errors in data stored in the L2 cache. As most data reads are satisfied by the L2 cache, the L2 cache's ECC function should catch and correct almost all single-bit errors in the memory subsystem. It will also detect double-bit errors although it cannot correct them. But this isn't such a big deal since double-bit errors are extremely rare. For all practical purposes, the ECC check should be able to catch virtually all data errors. This is especially useful at overclocked speeds when errors are most likely to creep in. So, for most intents and purposes, I recommend that you enable this feature for greater system stability and reliability. Please note that the presence of this feature in the BIOS does not necessarily mean that your processor's L2 cache actually supports ECC checking. Many processors do not ship with ECC-capable L2 cache. In such cases, you can still enable this feature in the BIOS but it will have no effect. 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