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 Originally Posted by Renton
IMO definitely build one, and with every component avoid going into diminishing returns of performance. Usually there is a sweet spot for pricing where you'd have to spend twice as much to get something 5-10% better. The only thing I would consider splurging on is the GPU. When I built my computer a couple of years ago, iirc the most costly things (in order) were gpu, processor, motherboard, distantly followed by ram and the tower, everything else was dirt cheap.
I'll echo most of what Renton said except for power supply. Get a decent power supply as the voltages/watts claimed by cheap power supplies are achieved on a good day with a following wind at their peak . A decent supply will give stable voltages rather than voltage spikes ,have multiple rails (helps spread the peak load preventing low voltages causing problems) and modular cables which means that you just plu in the cables you need which reduces the clutter in the case which improves airflow which helps keep your expensive components cool and less likely to fail.
When power supplies fail , its quite likely that it will fry some of your other components as well. THeres no point saving 20 or 30$ (no idea on the price differences betwen good and bad in the us) when you could be jeopardizing another 1000$ of components in the rest of your computer .
Another major benefit of building your own is that once you've done it once you won't buy another again and when you need increased performance you just upgrade the parts you need to rather than going out and buying a whole new computer.
If its your first build , also consider looking for a case that features a removable motherboard tray. You'll find it a lot easier lining pins up as visibility and access are better and when you actually fit the tray into the case everything is firmer and you will be holding the tray rather than the motherboard.
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