What do I need to build my own gaming computer?

I had a bad experience with CyberPowerPC when they sent me a gaming computer and 5 months later it started having CPU and Graphics problems. I decided I would just build my own form buying parts off the internet. I built computers back in high school so I somewhat know how to do it and know that it isn't that hard to do but i do need help with what part to get and which ones are compatible with which. I already went to new egg and Im looking to spend no more than $900 before shipping and such and so far this is what I have:


Just in case link doesn't work then here are all the parts:

Case: Athena Power CA-GSB01DA Black 0.8mm SECC Steel ATX Mid Tower Computer Case - OEM

HDD: Western Digital WD Black WD5003AZEX 500GB 7200 RPM SATA 6.0Gb/s 3.5" Internal Hard Drive -Bare Drive

CPU: Intel Core i3-2100 Sandy Bridge 3.1GHz LGA 1155 65W Dual-Core Desktop Processor Intel HD Graphics 2000 BX80623I32100

Graphics: XFX Double D FX-785A-CDFC Radeon HD 7850 2GB 256-bit GDDR5 PCI Express 3.0 x16 HDCP Ready CrossFireX Support Video Card

Sound: ASUS Xonar DX 7.1 Channels PCI Express x1 Interface Sound Card

Power Supply: Rosewill RD400-2-DB 400W ATX V2.2 Power Supply

Memory: CORSAIR Vengeance 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model CMZ8GX3M2A1600C9B

Motherboard: ASRock Z77 Extreme4 LGA 1155 Intel Z77 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard

COOLER MASTER Hyper 212 Plus RR-B10-212P-G1 "Heatpipe Direct Contact" Long Life Sleeve 120mm CPU Cooler Compatible with Intel ...

Windows 7 Home Premium

Notes: I do not need any other OS or a larger HDD since I will only have like 2-3 games on this computer and nothing more, but if you see something I could do without (the cooling fan) or something that I can get cheaper that will have the same capabilities then let me know. Also, if there is anything that seems incompatible with something else (Motherboard -> Power supply) then also let me know.

Reminder: I know computers but im a little out of date on what is good and what is not so Im clueless when it comes to motherboards and whats the most compatible with them. I could really use the help. Thank You

3 Answers

  • PTRP
    Lv 7
    8 years ago
    Favorite Answer

    Things you can change:

    1. Drop the soundcard, you really don't need it and just use the extra money for upgrading other parts.

    2. If you do not intend to get an unlocked multiplier CPU like the 3570K then that Z77 mobo would only be useless since Z77 mobo's are specially designed for overclocking unlocked CPU's, so either upgrade to an I5-3570K or downgrade to a decent H77 mobo.

    BTW, The I3-2100 sandy bridge does not support PCIE 3.0, even the newer I3-3220 IVY Bridge also does not support PCIE 3.0:


    Expansion Options

    PCI Express Revision


    # of PCI Express Lanes




    Expansion Options

    PCI Express Revision


    PCI Express Configurations

    1x16, 2x8, 1x8 & 2x4


    So since your GPU and mobo is PCIE 3.0, then it would be a good idea and more worth your money to get a CPU that supports PCIE 3.0.

    The lowest CPU that supports PCIE 3.0 is the I5-3330:


    Intel Core i5-3330 Ivy Bridge 3.0GHz (3.2GHz Turbo) LGA 1155 Quad-Core Desktop Processor Intel HD Graphics 2500 BX80637i53330 - $190


    But since the I5-3450 is just $195 and the I5-3470 is at $199 then you might consider getting either of them which is better, but for gaming, the I5-3330 would be more than good enough.

    Here is an example of an H77 mobo that you could get:

    ASRock H77M LGA 1155 Intel H77 HDMI SATA 6Gb/s USB 3.0 Micro ATX Intel Motherboard - $70


    This is the one I am actually using with my I5-3470 and it is working fine as of to date, if you're on a strict budget then this mobo would be okay.

    By doing this downgrade, you save $60 that you can use to upgrade your CPU.

    Another thing is your PSU, 400W is not a good idea since the HD7850 already requires:

    500W (or greater) power supply with one 75W 6-pin PCI Express power connector recommended (for the whole system with an HD7850)


    So, I suggest for you to get a good branded 600W PSU, never go cheap with your PSU my friend since it is a very important component of a PC build especially for a gaming PC.

    Here is one that I could recommend:

    SILVERSTONE Strider Essential series ST60F-ES 600W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS Certified Active PFC Power Supply - $70


  • 8 years ago

    You'll want to up the wattage on the PSU to at least 450 watts and have it be 80+ approved for power efficiency and the ability to power your 7850. Corsair Builder is a decent line to consider.

    If you're gonna stick with the i3 CPU, then swap out your mobo for one with an H77 chipset instead of a Z77, as the Z77 is meant for overclocking and crossfiring video cards. If you live near a Micro Center (look up your location on microcenter.com), you can get an i5-3570k, arguably the best gaming processor out there at the moment, for $170. If you combine a compatible mobo with that processor there, you also get $40 off.

    Everything else seems good. Make sure your card & CPU cooler can fit inside that case, and possibly get another 120mm fan for the case as it only comes with one.

    You can post your parts on pcpartpicker.com, then call the guys over at reddit.com/r/buildapc if you have more questions; they're more active and knowledgeable.

  • 8 years ago

    I'm not sure you can get a amazing gaming computer for $900 but this is what I can tell you, I have a normal HP Pavilion Slimline I modified to game a little. the only thing I did though is replace my graphics card with a GeForce GT 620 NVIDIA that cost only $98.52. I can run Skyrim, GTA IV, GTA SA, Dishonored, Bullet run, and a few more games at max graphics with this card. but I would talk to a professional at Best Buy.

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