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Slow Computer. Need more RAM?

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The Problem: My computer is slow. It will be fine for a few minutes and then if I try to do something really simple (like open a new Firefox tab or a new Windows Explorer window) it will freeze up for ~30 seconds before returning and being fine for another few minutes. This happens even without running many programs. Boot up is also slow.


My Question: Why is it slow? Should i upgrade to 16 GB RAM? Replace my Power Supply?


Typical Usage: Pretty basic, just use it for surfing the internet and editing spreadsheets, word docs etc. I don't do any gaming, video procesing etc



Computer Information:

I built it myself in 2009. All the parts were purchased in 2009

Windows 7, 64 Bit, Service Pack 1

CPU: Intel i5-750 Quad Core, 2.68 GHz

RAM: 4 GB (2x2 GB DDR3-1066 SDRAM, 533 MHz). OCZ Gold XTC

Motherboard: ASUSTeK Computer INC. P7P55D (LGA1156)

Power Supply: Seasonic S12D 750W  http://www.pureoverc...onic-s12d-750w/

Graphics Card: NVIDIA GeForce GTS 250  2793 MB


Steady state CPU temperature is about 35 deg C


More info about the problem:

  • When I boot up and idle without any opening any programs, RAM usage is at ~40%
  • During normal usage (5 or 6 tabs open in Firefox and maybe a spreadsheet open) RAM usage is ~80%
  • I had a thread (http://www.geekstogo...dles-70-memory/) from 2016 on this forum to try and address the problem. Ultimately the thought was that it might have been the Power Supply Unit, but I never got to the point where I had a backup PSU and the time to test this theory out, so I never was able to resolve the issue. Plus I started using my smartphone more for day to day activities which displaced some of my computer time, so I've just been dealing with it for the last few years.
  • If I had reason to believe that upgrading my RAM or PSU for ~$100 would fix the issue, I would do it. But I don't want to buy either/both only to find out that it was something else


Thank you!

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Bump it up to at least 8GB of RAM and replace the HDD with a SSD.

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