I'm technically building my second PC, but my first build was around ten years ago when I mostly handed tools to my dad and wore a grounding strap. I still use that computer, but after researching current hardware, I'm realizing how much has changed and that it's time for a completely new system.
My tentative parts list is a Ryzen 7 9800X3D, an RTX 5080 or possibly an RTX 5090, 32 or 64GB of DDR5-6000 CL30 memory, a 2TB Samsung 990 Pro SSD, a Corsair RM850x power supply, and a Noctua NH-D15 G2 cooler. I'm unsure about the motherboard: I currently have an ASUS TUF Gaming X570-Plus, but I don't know whether it supports the new processor and memory.
Could someone check whether these parts make sense together and point out anything incompatible, excessive, or poor value? I'd also appreciate advice on whether I should use two SSDs, whether a high-power PSU needs a special power cable in the UK, how many case fans I should have, and whether different thermal paste brands make a meaningful difference. I'm prone to overthinking every choice, so practical guidance would be very welcome.
2 Answers
The X570 motherboard won’t work with the 9800X3D. It uses a different socket and DDR4 memory, while the new CPU needs an AM5 motherboard with DDR5. You’ll need to choose a suitable B850 or X870-class board, depending on the features you want.
You generally don’t need two SSDs unless you need more total storage. Separating the operating system from your files is no longer necessary for most people; one good 2TB drive is perfectly fine, and you can partition it if you prefer.
A UK PSU uses the normal mains cable that comes with it, so no special wall connection is required. Extra case fans depend on the case and how many fans it includes, but a couple of front intakes and a rear exhaust are usually a solid starting point.
You also don’t need to obsess over thermal paste. The compound included with a reputable cooler is normally good enough. Different mainstream pastes perform very similarly, while liquid metal adds risk and isn’t worthwhile for a first build.
The parts will need some value checking because several of your choices carry a premium for the brand rather than providing a noticeable benefit. Corsair memory is fine, but other reputable DDR5-6000 CL30 kits may cost less and perform the same. The Samsung 990 Pro is also a good drive, but cheaper models can offer essentially the same real-world experience for gaming and normal desktop use.
The RM850x is a quality PSU, although you should compare current prices against other well-reviewed, ATX 3.x units. If you choose an RTX 5090, check the recommended wattage and make sure the PSU includes the appropriate modern GPU power connector; an 850W unit may not be enough depending on the rest of the system and the card’s requirements.
The NH-D15 G2 is capable, but it’s expensive. A Thermalright Phantom Spirit or another strong dual-tower cooler can deliver nearly identical results for much less. Case airflow matters more than buying premium fans: use the fans supplied with a well-designed case first, then add more only if temperatures or noise indicate a need.
I definitely got drawn into the expensive brands because I wasn’t sure how to compare parts. I’ll look at the actual specifications and reviews instead of assuming the most recognizable name is automatically the best choice.
That clears things up, thanks. I was considering a second SSD mainly to keep the operating system separate, but I’m probably over-optimizing before I’ve even built the system.