67. Operating System. offtek. Anyway, I went with the Abit only because the DFI only allows for x8 x8 operation even when not in SLI (no selector switch/jumpers/Bios option). I bought a KN8 Ultra maybe a month ago. Motherboards Abit KN8 ULTRA-SOTES user manual pdf download free [3. By: Search Advanced search…Upgrade your Abit Motherboard with quality memory - Buy Abit KN8 Ultra-SOTES Motherboard RAM with lifetime warrantyABIT KN8 ULTRA. Help Drivers. Im a big ebay user and long time paypal member so hopefully thats enough to get me started. Abit KN8 ULTRA Operation & User’s Manual User Manual for Abit KN8 ULTRA Motherboard (72 pages) Specifications: 2/2780-kn8_ultra. . DasFox Limp Gawd. When you click a link to make a purchase, we may earn a commission. Abit Kn8 Ultra Audio drivers? Discussion in 'Processors and motherboards AMD. The configuration Abit provides comes with a AMD Athlon 64 / 64 FX / 64 X2 Socket 939. Motherboard Abit AMD. Manufacturer. Home. AMD Athlon 64/64FX/64x2 Dual Core System Board Socket 939. ABIT KN8 Ultra Full specifications and reviews of the Motherboard. . I have sound, however my applications have no control over the sound levels. Brand: OFFTEK. Abit KN8 Ultra SKT939 NF4 chipset Dual DDR400 PCI-E SATA ATX Geil Value 1Gb PC3200 Dual Chan DDR Kit (2x512MB) (Cas 2. 450w asus eax600xt-td 128mb pciexpress 1. KN9 SLI KN9 Ultra KN9S. To view this case mod, go here. ABIT KN8 Ultra Opteron 144 CAB2E 0546 Corsair TWINX-1024-XL FSP 450 Watt PSU (2x18a@12v) WD 80 gig SATA LITE-ON DVD-RW Thermaltake Big Typhoon Thermaltake SOPRANO Nickf, Jan 20, 2006 #1. pdf file (25 Feb 2023) Manufacturer: Abit; Category of Device: Motherboard; Document: KN8 ULTRA Operation & User’s Manual, File Type: PDF; Updated: 25-02-2023;Causes of "boot disk failure" Abit KN8 Ultra problem? Seeing that Windows fail to boot can be stressful but there are several ways on how to fix boot errors. The specs of. CPU; The POST screen now show correctly when ATI X1300 VGA card installed. Joined Feb 16, 2005 Messages. User icon Login; A search icon. Chipset. Back 40 Trail Races. Found 17 files for Windows Vista, Windows Vista 64-bit, Windows XP, Windows XP 64-bit, Windows 2000, Windows Server 2003, Windows. Download is free of charge. I have a "KN8 ulta" motherboard; a slackware 10. Lost password Send activation emailHide my online status this session. Abit Socket 939. . Windows 2000-XP-2003ABIT (later spelled abit) was a well-known manufacturer of consumer motherboards from Taiwan. Motherboards Abit KN8 ULTRA-SOTES user manual pdf download free [3. 50 * 11. Browse online or download Abit KN8 ULTRA-SOTES User guide 74 pages. Updates occur frequently when new product information is received. A gyári lemezről raktam föl a drivert az alaplapom KN8 Ultra (ABIT) Próbálkoztam más driverekkel is, de semmi sem változott. BIOS CHIP ABIT AN8, KN8-ULTRA, FATAL1TY AN8, UL8, AN8-V. New posts Search forums. I replaced my motherboard with an ABIT KN8 ULTRA and I installed a basic soundblaster Audigy SE. 1 pc. Newegg has some reviews of the AN8, but none are in depth. 1 CH Audio Specifications: CPU. Hardware. I want to replace the current Wolverine (look in sig). NvRaid Installation Disk. 3. Introduction. 6. I would realy like another ABIT because my NF7 is so great and reliable. I. Abit category Mainboard type hardware product 4 models license BIOS file format PDF Document title BIOS summary Abit KN8/KN8 SLI/KN8 Ultra/KN8 Ultra-OTES BIOS v1. Prices and specifications are subject to. Chipset. Abit Socket 370 Computer Motherboards, Socket 939 Computer Motherboards, I just picked up a FX-55 and am looking for a good, stable skt. ABIT Engineered. Motherboard ABIT KN8 ULTRA User Manual 72 pages. To read the user’s manual of PDF format (readable by Adobe Reader ),. Search titles only; Posted by Member: Separate names with a comma. Is anyone using this board? What kind of overclocks are you getting with it? The Abit KN8 SLI. Order Information Model ! Features KN8 Ultra NF4 Ultra, SATA2 3Gb/s KN8 NF4, SATA 1. 3. Download is free of charge. 5 3-3-7: Video Card(s) Radeon X800GTO2(r480) Flashed to X850XT PE (540/590) Storage (Perpendicular recording)Seagate 7200rpm 250GB 16MB Cache,NCQ sata2: Display(s) Samsung Syncmaster 940BF:I have a ABIT KN8 Ultra ATX AMD Motherboard and a Creative Sound Blaster X-Fi XtremeMusic. Motherboard amd socket 939. Universal abit > Motherboard, Digital Speakers, iDome, AirPace, Multimedia Select Country Global Austria/Germany Australia/New Zealand Benelux China France Italy Iran Japan Korea Middle East Nordics Poland Russia South East Asia Spain Taiwan Turkey United Kingdom United States/Canadahmm KN8 Ultra seems cheaper, but what features will i miss, not including the heat pipe? (hopefully none of the overclocking powerness is gone ) Last edited: Dec 1, 2005Abit KN8 Ultra 11 driver description: Publisher review: 1. Another way is to boot from the Recovery Partition or the. How reliable are these motherboards? It will have the following specs: CoolerMaster Centurion Case. Related forEnter Abit BIOS KN8 Ultra-OTES into the search box above and then submit. Forums. My system has a matched pair of CMX512-3200C2 and a matched pair of CMX512-C2PT modules for a total of 2 GB of memory. ABit KN8 Ultra Mainboard AMD Opteron 146 OCZ Premium DDR Kit (2x512MB) CL2. Downloads 11 Drivers and Manual for Abit KN8 Ultra Motherboards. I have a X2 3800+ on a KN8 Ultra runing as a server, and it started to reboot it self randomly about a month ago, and has got alot worse recently (I have it set to auto reboot on. 74" display Samsung Galaxy F54 goes. . memory is set a cas latency 3. This was part of a new system build which included a 580W Raidmax PSU and Geforce 7800gt. 4. Thanks so much in advance!abit | Материнские. Added: 03/19/2006: Size: 19. . com FREE DELIVERY possible on eligible purchasesUpgrade your ABIT KN8 Ultra with guaranteed compatible ABIT RAM memory. User icon Login; A search icon. BIOS compiled date: 05/15/2006 Specifications: NVIDIA NF4 Ultra Based AMD Athlon 64/64FX Mainboard, 2GHz HT, Dual DDR400, PCI-Express, NV SATA RAID, NV GbE, NV Firewall Hyper Transport Technology HyperTransport technology, which delivers a 2GHz effective system bus, is a high-speed. hy! i have this configuration: abit kn8 ultra athlon64 venice 3200+ kitt dualchannel 2*256 ddr400 twinmos P. Description. Version. Programming ** Package: PLCC-32 4MBit. To read the user’s manual of PDF format (readable by Adobe Reader), place the “Driver &. 00PG magicpotatoes Unregistered #2. Abit KN8 Ultra motherboard. . Thread starter Fredgeot; Start date Apr 12, 2008; Apr 12, 2008 #1 F. Model. com; Mainboards;Model Type of Document; Abit KN8 ULTRA: Abit Motherboard KN8 ULTRA Operation user's manual (72 pages, Mb) Abit KN8 ULTRA-SOTES. Newegg shopping upgraded ™abit kn8 User Manual. Support new LPC Flash, SST-49LF040B 3. any idea why ? from manual: Tested at aggressive latency settings of 2-3-3-6 for all platforms. Chipset fan sometimes makes excessive noise. 0x multiplier 200mhz fsb with 1000mhz HT link. By ThreeD September 15, 2010 in Memory. Support KN8 Ultra-SOTES. Yes I. . 19, KiB, /05/30, Award, changelog. In some cases our guess may be incorrect. Abit KN8 Ultra. Browse online or download Abit KN8 ULTRA-SOTES User guide 74 pages. Motherboard ABIT KN8 ULTRA User Manual 72 pages. Universal abit > Motherboard, Digital Speakers, iDome, AirPace, Multimedia. Experience Overclock on the new Fora Communities app for iOS & Android! Get the best of Overclock on our official app. Attention! Your ePaper is waiting for publication! By publishing your document, the content will be optimally indexed by Google via AI and sorted into the right category for over 500 million ePaper readers on YUMPU. Search titles only By: Search Advanced search…To get the BIOS KN8 driver, click the green download button above. Motherboard ABIT KN8-SLI User Manual 72 pages. Abit KN8 Ultra si SATA II - Cica Abit KN8 Ultra suporta nativ hdd-urile SATAII. I like abit, but i know asus and gigabyte are around a lot but never used em so i'd. Free shipping. Operating System. We have 1 ABIT KN8 ULTRA manual available for free PDF download: User Manual . The AN8 board layout is better IMO, heatpipes. Motherboard AMD Socket 939. Upgrade your Abit Motherboard with quality memory - Buy Abit KN8 Ultra Motherboard RAM with lifetime warrantyMemory upgrade for Abit Motherboard, and all Abit Motherboard Memory. Download. KN8 Ultra Expansion Slots. Full screen Standard. KN8 Ultra Socket 939 Nvidia® NF4 Ultra 2GT/s HT Dual DDR400 PCI-Express Gigabit LAN SATA 3Gb/s 7. Abit Socket 939. válasza csacsalo (17:56) részére. Posted September 15, 2010. com are free of charge type. Guaranteed Compatible with Abit KN8 Ultra Motherboard. If I try to control the sound levels from within. Description. OFFTEK 1GB Replacement Memory RAM Upgrade for Abit KN8 Ultra (PC3200 - Non-ECC) Motherboard Memory . Page 1: Amd Socket Am2. . I will be using this in a system with: 3200+ Venice core CPU ATI X800XL GPU 2 GB Corsair Twinx PC3200. I like how people have said on the an8 family there are the LED number post codes, that I have an Abit NF7-S so I am familiar with owning an. My Ballistix crapped out so I also had to get new RAM (Gskill 2x1GB PC-4000). Hi When I overclock my Athlon64 3200+ "Venice", my computer won't boot when I push the power-button after a regular shutdown. do i need to connect it? 2. The following motherboards have been tested and passed NVIDIA's compatibility testing requirements with the GeForce 7950 GX2 graphics card*. Thread starter dereklove; Start date Jun 3, 2006; Tags Chip Chipsets Motherboards MSI-Microstar Toggle sidebar Toggle sidebar. 1. mushrooms Gawd. Related forI have an Abit KN8 ultra with a cheap and noisy NB fan. To start viewing messages, select the forum that you want to visit from the selection below. Paul Mathews, Nov 26, 2005. It's a three-tone beep. com; Mainboards; ABIT; KN8 Ultra; ABIT KN8 Ultra Bios v. Support new LPC Flash, SST-49LF040B 3. 450w asus eax600xt-td 128mb pciexpress my problem is that, i think my vga is too hot! everest home edition and atitool detect a temperature of 52 celsius of the gpu in idle mode. Recalibrate CPU temperature. Buy ABIT KN8 Ultra 939 NVIDIA nForce4 Ultra ATX AMD Motherboard with fast shipping and top-rated customer service. 285. General Memory Installation Video I have narrowed my motherboard choices down to these two (ASUS A8R-MVP or Abit AN8 Ultra). Description: Fixed the issue that the system may not boot from CD-ROM when "on-board LAN" is set to "Disable". Not Applicable. 2GHz HyperTransport FSB, NVIDIA NF4 Ultra Chipset, ATX Form Factor System CPU Type; AMD Athlon 64 / 64 FX / 64 X2: Memory Warranty; Lifetime Warranty. Fixed the issue that the serial port and parallel port may not work 2. C $13. Free ABIT KN8 nForce4 Chipset Driver v. 2GHz HyperTransport FSB, NVIDIA NF4 Ultra Chipset, ATX Form Factor System CPU Type; AMD Athlon 64 / 64 FX / 64 X2: Memory Warranty; Lifetime Warranty. Lastmanuals provides you a fast and easy access to the user manual ABIT KN8 ULTRA. The following motherboards have been tested and passed NVIDIA's compatibility testing requirements with the GeForce 7950 GX2 graphics card*. Operating System. Furthermore, always look out for deals and sales like the 11. Totusi, instalarea unui WD2000JS are unele probleme:1. Opens in a new window or tab. It is a software utility which automatically finds and downloads the right driver. 7. AT8 32X Abit AV8 Abit AV8-3rd Eye Abit AX8 Abit AX8 V2. 06 $ 17. The KN8 is t3h suck at OCing. KN8 Ultra AMD 4400 2GB Corsair RAM 150GB WD Raptor Gigabyte Geforce 7800GT (Zalman) CoolerMaster Centurion Case It is a very nice mobo for games, encoding, whatever. With regards to the hard drive, I'd get a SATA drive instead. Enter Abit BIOS KN8 into the search box above and then submit. PNY 6600 PCI-E. Overclocking. I like my current mobo a lot, but I want to have. If not, browse the root directory of the CD-ROM via the File Mana. Why system will hang or boot fails after installed the SW IDE Driver when using a dual core CPU under Window XP/2000 ? (AN8, AN8-V, AN8-3rd Eye, AN8 Ultra, AN8 SLI, Fatal1ty AN8, Fatal1ty AN8 SLI, KN8, KN8 Ultra)Why system will hang or boot fails after installed the SW IDE Driver when using a dual core CPU under Window XP/2000 ? (AN8, AN8-V, AN8-3rd Eye, AN8 Ultra, AN8 SLI, Fatal1ty AN8, Fatal1ty AN8 SLI, KN8, KN8 Ultra)Abit kn8 , enabling sataII features? Thread starter nightanole; Start date Jan 17, 2006; Jan 17, 2006 #1 N. Only about two weeks. . I am trying to replace and upgrade the memory to TWINX 2048-3200PRO (DDR-400). This was part of a new system build which included a 580W Raidmax PSU and Geforce 7800gt. 50M. Abit kn8 ultra memory problems. abit Global | Motherboards. Newegg shopping. My Ballistix crapped out so I also had to get new RAM. I cannot find my Abit KN8-SLI Motherboard in the Memory Configurator. I ended up with: - AMD Athlon 64 X2 4400+ Toledo - Abit KN8-Ultra NF4-Ultra - POV Geforce 7800GT I was thinking I would use my 2x512MB Corsair XMS3200LL to. The KN8 Ultra L1 cache is 64 kilobytes in size, while its L2 cache is rated at either one or two megabytes. 0 PSU I am having a bizarre. 1 CH Audio The NVIDIA® GeForce® 7950 GX2 architecture allows two graphics processing units (GPUs) to be employed on a single graphics card for an ultimate gaming experience. 42 by simply increasing the FSB to 220 MHz. 5 6-3-3) Maxtor 6L200M0 Diamond Max 10 200GB 7200RPM SATA Sapphire X800GTO 256mb GDDR3 PCI-E VGA/TVO/DVI Later I added a Hauppauge WinTV-PVR500 Dual TV tuner Media center Upgrade kit, and another Maxtor 200GB Serial ATA HDD. Log in. 8 Connecting I/O Devices KN8 Ultra-SOTES KN8 Ultra KN8 • Mouse: Connects to PS/2 mouse. Support KN8 Ultra-SOTES. I will be using this in a system with: 3200+ Venice core CPU ATI X800XL GPU 2 GB Corsair Twinx PC3200. EN. Camping. Please note: This list may not reflect every available motherboard on the market NVIDIA nForce4 Ultra, ABIT, KN8 Ultra, S, ATX, N, Y, Y, Y, Y, Y, N/A. KN8 Ultra: Socket 939; Nvidia® NF4 Ultra; 2GT/s HT; Dual DDR400; ManualKN8 Ultra-SOTES KN8 Ultra - LinuXden. 1 CH Audio Driver: 64bit driver support list; Drivers can also be downloaded from the following sites:The NVIDIA® GeForce® 7950 GX2 architecture allows two graphics processing units (GPUs) to be employed on a single graphics card for an ultimate gaming experience. View and Download Abit KN8 ULTRA instruction manual online. Introduction. 60. Let me start that I am running Windows Vista Ultimate on my system (Athlon x2 4800+, Abit KN8 Ultra motherboard). Эта работа была прислана на наш "бессрочный" конкурс статей и автор получил поощрительный приз. Motherboard. BIOS compiled date: 08/26/2005 Specifications: NVIDIA NF4 Ultra Based AMD Athlon 64/64FX Mainboard, 2GHz HT, Dual DDR400, PCI-Express, NV SATA RAID, NV GbE, NV Firewall Hyper Transport. Log in. Specs: AMD Athlon 64 3800+ OC'ed to 2. The build in question is using an Abit KN8 Ultra motherboard. You can pickup X300 for around £28. 37 MB. . ABIT KN8 Ultra BIOS v. Page of 72 Go. 1. ABIT AN8-V. ARTICLES . About this Manual: This user’s manual contains all the information you may need for setting up this motherboard. Newegg shopping upgraded ™. Heres what I have on board at the moment: Amd Athalon 64 x2 3800+ Processor Ati x1900 512mb videocard 3 gig of corsair ddr ram pc3200 ABIT KN8 Ultra Motherboard I wanted a dx10. Basically, i have an entire pc build picked out, but i can't decide on the mobo. Motherboards Abit KN8 ULTRA-SOTES user manual pdf download free [3. 31. Abit KN9 Bios 1. First release. Also supports Hyper-Threading technology. Neither drive is recognized in Vista at all. OS support: Windows (all). motherboard is an Abit KN8 Ultra, which works fine under Windows XP x64. An icon used to represent a menu that can be toggled by interacting with this icon. C $26. . Abit KN8-ULTRA: Cooling: AMD 64 CPU Heatsink and Fan (3 case fans) Memory: 1024MB PQI TURBO (2x512)2. Once you know, you Newegg!So I bought a pretty nice gaming pc about 2 years ago. Joined: May 14, 2007 Messages: 1 Likes Received: 0. Motherboard Abit AMD. . 1. Abit KN8 Ultra Bios 19 1,333 downloads. Shop with confidence. we cannot guarantee you can download the full right driver or manual from the driver or manaul download link and get the completely. 1. Drivers for Abit Socket 939 Motherboards. 6% Total voters 9. zip . 0ghz overclock, or will I have to overclock memory as well? I read the forum sticky, but I don't. Vendor. Samsung Sht 8610 Manual, Manual For Dct2224, Raptor Husbandry Manual, Samsung Smart Tv Installation Manual, Sansui R-550 Manual, Antec Minuet 350 Manual, Abit Kn8 Ultra Manual Download dotfutbol 4. I wanted to grab the AN8 but its out of stock everywhere and. Abit kn8 ultra memory problems. Vendor. Uploaded By. Summary of Contents of user manual for abit kn8. Hardware. KN8 Ultra-SOTES: NVIDIA® NF4 Ultra Based K8 Dual Core ATX Mainboard, 2GHz HT, Dual DDR400, SATA 3Gb/s RAID, NV GbE w/ Firewall, 7. COMPATIBLE WITH: Windows 9X Windows ME Windows NT Windows 2K Windows XP Windows 2003 Motherboard ABIT KN8 ULTRA User Manual 72 pages. Universal abit > Motherboard, Digital Speakers, iDome, AirPace,. 50, while the ABIT KN8-SLI is $109 and the ASUS A8N SLI costs $121. randomly started getting loud as fuck but it goes away from time to time. 1 What's New: 1. You may have to register before you can post: click the register link above to proceed. ] EVGA 7800GT (the version clocked at 445) Coolermaster Realpower 550 w/ Active PFCHey I was wondering if anyone else has some ideas - I think I'm looking at an RMA here. i" 2. XP Pro SP 2++++ 1 Reply 1 View Permalink to this page Disable enhanced parsing. Nf ck804 manual transmission Abit Motherboard AN8 NF-CK Drivers. BIOS compiled date: 07/07/2005 Specifications: NVIDIA NF4 Ultra Based AMD Athlon 64/64FX Mainboard, 2GHz HT, Dual DDR400, PCI-Express, NV SATA RAID, NV GbE, NV Firewall Hyper Transport Technology HyperTransport technology, which delivers a 2GHz. ABIT KN8 Ultra/KN8 Parallel port woes. Page 1 Introduction KN8 Ultra-SOTES KN8 Ultra KN8 Hardware Setup. ex. It seems the board has been pulled from production because of the KN8-Sli taking it's place. 1. Would like your feedback on which you think would be the best choice. ABIT KV8-MAX3. 1 CH Audio CODEC • Supports auto jack sensing • Supports optical S/PDIF Out (For model “KN8 Ultra-SOTES” and “KN8 Ultra” only) ABIT Engineered Download Abit BIOS drivers, firmware, bios, tools, utilities - Page 9 Free drivers for ABIT KN8 Ultra. I'm currently using Catalyst 6. Like. Hi people, I have a Sapphire Radeon X800GTO 256MB AGP card, 12 pipelines; I'm pretty sure it could be modded to 16. com. . . 10 pcs. Abit KN8 ULTRA User`s manual Abit NV8 User`s manual Abit AT7 User`s manual Abit Pro NF8-V2 User`s manual Asus NRL-LS Servers & Workstation User Manual. Anyone have either of these mobos care to. What are people's thoughts and experiances with this motherboard? I owned two KG7-RAIDs back in the day and loved them; just replaced them about four months ago. Masonry Training Manual, Epson U220b Manual, Abit Kn8 Ultra Manual Download, Free Mercedes Benz Service Manual, Sansui R-550 Manual, Descargar Manuales Para Hacer Bisuteria, New K53 Manual DownloadInstalled the Abit KN8 SLI for a cousin this past weekend. DriversCollection. BIOS compiled date: 05/03/2006. Aside from the heat pipe on the chipset, what is the difference between these two Mobos? I want to build an NForce 4 Ultra chipset board with an AMD 4400 X2. Model. I don't have a KN8, but I do have a AT8 32X, AN8 Fatal1ty, UL8 and some Socket A Abit's. · Hi, I've got no solution, but I can confirm. 939 mobo. . Opendrivers. 4%. Do. Only for GA-K8N Pro-SLI. 5 3-3-7: Video Card(s) Radeon X800GTO2(r480) Flashed to X850XT PE (540/590) Storage (Perpendicular recording)Seagate 7200rpm 250GB 16MB Cache,NCQ sata2: Display(s) Samsung Syncmaster 940BF:View online or download Abit KN9 ULTRA User Manual. Jun 3, 2006 5 0 18,510. Support DRAM "CAS Latency and Command rate" adjusting function. Guaranteed Compatible with Abit KN8 Ultra Motherboard. com. Consistent and reliable important is Priority one. Jump to Latest Follow 463 views 1 reply 2 participants last post by prodigyru Jan 17, 2006. I just built this system and it takes about 3 min to bootup with XP Pro. . Im new here to the forum and heat but Im hoping to get started out. Buy It Now. 1 CH Audio, ABIT Silent OTES. Abit AN8 Ultra Socket 939 AMD NVIDIA nForce4 Ultra Motherboard + AudioMAX 7. Pretty much every time I try to OC it at known workable speeds on other boards, mine doesn't like it and doesn't even boot. Registration is $1 to post on this forum. Downloads 488. Support KN8 Ultra-SOTES. Download Abit KN8 Ultra Bios 17 - BIOS. 0 manually, system wont boot and i need to clear cmos. Brand: ABIT | Category: Motherboard | Size: 7. ABIT FATAL1TY AN8-SLI. KN8 Ultra: Socket 939; Nvidia® NF4 Ultra; 2GT/s HT; Dual DDR400; PCI-Express; Gigabit LAN; SATA 3Gb/s; 7. Abit KN8 Ultra motherboard. randomly started getting loud as fuck but it goes away from time to time. It strikes me as the same as the Ultra, but you can compare features at Newegg. 9 AMD 4800+ 90nm Thermalright XP-90 w/ Vantec 92mm Tornado Corsair TWINX2048-3200C2PT eVGA 7800GTX 2x WD Raptor 36. 46 MBytes: License: -Type: BIOS: Small description: Changes are the following: Support FX60. Downloads Free! 12 Drivers and Manual for Abit KN8 Ultra Motherboards. i have a second 4 pin connector at the bottom of the motherboard. ABIT. theman2003, Jun 19, 2008 #1. In the results, choose the best match for your PC and operating system. ABIT FATAL1TY AN8-SLI. 5. NewEgg has reviews on it also. Joined Apr 30, 2002 Messages 762. If I remove the top cover and fan, it leaves a copper plate with radial fins. 50K.