Mad Shrimps - Hardware news, articles, and how-tos.
NV News - Hardware news and reviews concetrating on NVidia-based video cards.
Open Directory - Very large set of links to hardware manufacturers and hardware-oriented websites.
The PC Guide - Excellent technical reference tool. Tons of details on various hardware components. Contains a procedure guide for installing and configuring various components as well as an extensive troubleshooting index.
Topic Index - Overall view of the inner pages of The PC Guide.
PC Lube and Tune - Articles and tutorials on different hardware components.
PC Mechanic - General information on motherboards, CPUs, memory, video, monitors, and hard drives. Includes BIOS beep codes. Motherboard and hard drive installation.
PC Part Picker - Compatibility info for building a PC, and some build guides.
PC Tech Bytes - Tech information, how-to guides, and links to utilities.
The PC Technology Guide - An excellent detailed overview of all of the components inside a personal computer. Includes a nice glossary of computer terms.
Speedy 3D - Gaming-oriented hardware news, articles, and reviews.
Spode's Abode - Hardware news, reviews, and tutorials.
Sudhian - News, reviews, and hardware information (formerly VIA Hardware).
System Optimization - Motherboard reviews and processor surveys. Information on motherboards, CPUs, chipsets, BIOS, cache, and memory. System benchmark surveys. Overclocking guide.
My Super PC - Specific product recommendations and where to get it for a good price along with links to product reviews and some assembly instructions.
Google Groups - Search old newsgroup posts for a company name to see what others think about them. Be careful: people are often much more critical on usenet than at other sources.
The PC Guide: Buyer's Guide - Extensive look at computer hardware purchasing. Includes guides on criteria for choosing hardware components, how to evaluate and deal with hardware vendors, and avoiding and solving hardware buying problems.
Intel Official Site - Intel processors (486, OverDrive, Pentium, Pentium Pro, Pentium II, Pentium III, Celeron, Xeon, Itanium, Pentium 4, Pentium M, Core 2).
The PC Guide: Processors - Very detailed look at the various x86 processors. Includes details on voltages, multipliers, cooling requirements, sockets types, and more.
Power Leap Official Site - CPU adapters (PL/586-133, PL/54C, PL/OD54C, PL/54CMMX, PL/ProMMX, PL/K6-III, PL/PII, PL/Renaissance/AT, PL-Neo/370, PL-iP3, PL-P4).
The PC Guide: Motherboards - Very thorough overview of the single most important component inside a computer. Form factors, chipsets, L2 cache, IRQ's, BIOS configurations, etc.
Upgrading with the AMD K6 - c't article on the AMD K6. Contains a list of K6-compatible motherboards. Also has info on typical clock frequencies, voltages, and BF jumpers for Pentium MMX (P55C) and K6.
Gibson Research - Spinrite home and some info on the Iomega Zip and Jaz Click-of DeathTM.
Hard Drive Related Terms and Tricks - Erik van Straten's hard drive info page. Lots of issues concerning hard drives (LBA, DMA, PIO, FAT32, partitions, and much much more).
Hard Drive Related Tools - Erik van Straten's list of diagnostic and benchmark tools for hard drives.
Jan's PC Upgrade Problems Page - Some good info on common hard drive problems. Includes util to detect BIOS Int13h Extensions for hard drives greater than 8.4GB.
The PC Guide: Hard Disk Drives - Overview of the history of hard drives and their construction. Discussion on drive geometries and the many problems with BIOS limitations and large hard drives.
The PC Guide: RAID - Indepth look at RAID systems and their configuration.
Storage Review - Indepth information and reviews on storage products.
Storage Search - Links to many different manufacturers of storage devices.
SSD Boss - Head-to-head comparisons of SSDs using mostly synthetic benchmarks.
The SSD Review - Reviews, articles, and tips on solid state drives.
Note: There are far too many system vendors to list all of the official sites. Those listed here are 'Unofficial' pages. For official sites, look in the Computer Company finder links below. Or just type: http://www.anycompanynamehere.com/, and you'll likely find what you're looking for.
Craputer - An amusing (but sadly all too familiar) rant about OEM-built systems.
comp.arch.hobbyist - Moderated newsgroup for building electronics (e.g. with a soldering iron). Not for simple assembly of computer components. Please read the FAQ before posting.