PC Parts and Building

Building a PC is way less scary than people make it sound. The parts only fit one way, nothing needs soldering, and the hardest part is honestly cable management. What trips people up is the buying, not the building. Below is how I'd think about each part, with the stuff that actually matters and the stuff that's marketing.

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Storage

Get an SSD. That's really the whole answer for most people. A hard drive is mechanical, with a spinning platter and an arm reading off it, and it tops out somewhere around 150 to 200 MB/s. An SSD has no moving parts, and even a slow one is three or four times quicker while a good one is twenty times quicker. In practice that means Windows boots in seconds instead of a minute, games load before the tip screen finishes, and the machine stops feeling like it's thinking about it. HDDs still have one job worth doing and that's cheap bulk storage. If you have a giant Steam library, a pile of RAW photos or years of video you'll never delete, a 4TB or 8TB drive is still much cheaper per terabyte. Put your OS and current games on the SSD, dump the archive on the hard drive, done.

Now the M.2 vs SATA vs NVMe thing, which gets mixed up constantly because those three words describe different things. M.2 is the shape, that little gum stick that screws flat onto the motherboard. SATA and NVMe are the language the drive speaks. So you can get a SATA drive in a 2.5" case, a SATA drive in an M.2 stick, or an NVMe drive in an M.2 stick, and only that last one is actually fast. SATA is capped around 550 MB/s no matter what it looks like. NVMe runs over PCIe lanes, so Gen 3 gives you roughly 3,500 MB/s, Gen 4 around 7,000, Gen 5 pushes past 12,000. Here's the part nobody wants to hear though. For gaming and normal desktop use, Gen 3 and Gen 5 feel basically the same. The jump from SATA to NVMe is huge. The jump from Gen 4 to Gen 5 is not, unless you're shuffling massive video files all day. Buy a solid Gen 4 drive with DRAM cache and don't pay the Gen 5 tax.

Graphics Card

Buy your GPU for the monitor you actually own. That's the single biggest money saver in this whole hobby. A card that crushes 1080p is a waste if you're on a 60 Hz office panel, and a mid range card will feel miserable pushing 4K at 144 Hz. Rough guide: 1080p high refresh wants a lower mid tier card, 1440p wants solid mid tier, and 4K wants upper tier or you accept upscaling. Speaking of which, DLSS and FSD-style upscaling are genuinely good now, so don't dismiss a card just because it hits your target with upscaling on.

VRAM is the spec I'd watch closest. 8GB is the floor and it's already showing cracks in newer titles at high textures. 12GB is fine for 1440p, 16GB is where I'd want to be if you're keeping the card for four or five years. Textures are basically free frames, so running out of VRAM and having to drop them is the most annoying way to lose image quality. As for used cards, they're usually fine, just get one you can test before paying and be aware you're giving up the warranty.

CPU

For gaming, cores stopped being the bottleneck a while ago. Six fast cores is playable, eight is the sweet spot, and past that you're paying for workloads you don't have. What actually moves frame rates is single core speed and cache, which is why the big-cache gaming chips punch so far above their price. And remember at 1440p and 4K your GPU is doing most of the work, so a mid tier CPU paired with a strong GPU beats the reverse almost every time. The one exception is 1080p competitive gaming, where the CPU really is the limiting part.

For office and productivity the math flips. Video editing, code compiling, heavy spreadsheets and running fifteen Chrome tabs with Teams open all like more cores. Also worth knowing, most modern desktop CPUs have integrated graphics built in, which is completely fine for an office machine. If nobody's gaming on it, you can skip the graphics card entirely and save a few hundred bucks plus the power draw.

RAM

16GB is the minimum I'd build with today and 32GB is the comfortable answer for a gaming or work machine. Games have crept up, browsers are pigs, and the price difference isn't what it used to be. The bigger thing people get wrong is buying a single stick. Always buy a matched two stick kit so you're running dual channel, because a single stick can cost you real frame rates for no reason at all. If you think you'll upgrade later, two sticks in a four slot board leaves you room.

Speed and timings matter less than the internet suggests, but they're not nothing on modern platforms since the memory controller is tied into the chip. Buy a kit in the well supported range for your platform rather than chasing the highest number on the box, since the extreme kits cost a lot and often won't run stable anyway. And this one is important, RAM runs at slow default speeds until you turn on the XMP or EXPO profile in the BIOS. It's one toggle. A lot of people run for years on a fast kit at half its rated speed and never know.

Power Supply

This is the part people cheap out on and it's the one part that can take the rest of the build with it when it dies. Get a unit from a reputable brand with 80 Plus Gold or better, and give yourself headroom above what your parts draw, usually 150 to 250 watts of margin. That headroom isn't about running the numbers close, it's about handling the split second power spikes modern GPUs pull, which is what causes those random shutdowns people blame on their graphics card. Wattage rating alone doesn't tell you quality either, so it's worth checking one of the PSU tier lists before buying anything unfamiliar.

If you're on a current gen GPU, look for ATX 3.1 with a native 12V-2x6 connector. Adapters technically work but you're adding failure points at the exact connector that's had melting issues, so a supply with the cable built in is worth the small premium. Also, plug the cable in all the way until it clicks. Sounds obvious, but a partially seated connector is behind a large chunk of the horror stories.

Cooling and Airflow

Air vs liquid is less dramatic than the forums make it. A good dual tower air cooler will match most 240mm all-in-one units, costs less, has nothing to leak and will outlive the build. AIOs win on looks, on clearing tall RAM, and on the biggest hot chips where you want a 360mm radiator. They also have a pump, which is a moving part with a lifespan. If you go air, just check the cooler height against your case clearance first, that's the classic mistake.

Case airflow matters more than the cooler itself. A mesh front panel with a couple of intake fans and one exhaust will beat an expensive cooler stuck behind a solid glass front, every time. Aim for roughly balanced or slightly positive pressure so dust comes in through your filters instead of every seam in the chassis. And clean the filters. A machine that thermal throttles after two years is almost always just a dust problem, not a dying part.