AMD FX-8120 - Am I going to bottleneck?

Hey guys,

I just got picked up an AMD FX-8120 on sale (around 130 USD) which was bundled with gigabyte 990 fxa ud3 mobo.

I needed a new CPU (unlocked phenom 2 which was burning up bad) and I don't know very much about them so I figured, 8 cores, why not?

Anyway I am realizing that the FX series has something of a bad rep especially when it comes to gaming, which I do a fair bit of on my desktop PC.

I am not a graphicsphile and I am fine with running the newer games on medium settings.

My other specs are:

8gb ddr 3 patriot series 2
Radeon 5770
Some crappy 500gb hard drive since I don't care about loading times.

Anyway I was just wondering if I have made a pointless purchase and if I should bother to try and return the CPU.

I realize the FX series compares unfavorably for gaming to Intel's corresponding equipment but I was wondering if it will even make a difference given the modest specs of my rig?

Thanks for your input.
11 answers Last reply
More about 8120 bottleneck
  1. Eh, with a 5770, it doesn't even matter. The 8120 will be bottlenecked by the 5770, not the other way around.

    The FX CPU's aren't wonderful for gaming, but they can still hang with a decent GPU (especially if you OC them).

    Still though, you'd need a lot stronger GPU than a 5770 to make the 8120 be a problem.
  2. DJDeCiBeL said:
    Eh, with a 5770, it doesn't even matter. The 8120 will be bottlenecked by the 5770, not the other way around.

    The FX CPU's aren't wonderful for gaming, but they can still hang with a decent GPU (especially if you OC them).

    Still though, you'd need a lot stronger GPU than a 5770 to make the 8120 be a problem.


    +1

    If I remember correctly, it takes something like a GTX670 to even begin to bottleneck the 8120 slightly.
  3. thanks for your input guys i'm grateful
  4. mocchan said:
    +1

    If I remember correctly, it takes something like a GTX670 to even begin to bottleneck the 8120 slightly.

    actually a FX 8150 OC'd can handle 2x HD 7970 CFX with minimum bottlenecking


    Edit: i suggest selling that HD 5770 and get a HD 7870, HD 7950, or HD 7970
  5. gamerkila57 said:
    actually a FX 8150 OC'd can handle 2x HD 7970 CFX with minimum bottlenecking


    Edit: i suggest selling that HD 5770 and get a HD 7870, HD 7950, or HD 7970


    Key word, OC'd :lol:
  6. mocchan said:
    Key word, OC'd :lol:

    yea there not meant to be run stock :)
  7. gamerkila57 said:
    yea there not meant to be run stock :)

    Yes, exactly.
  8. As the OP is aware, the 5770 is the bottleneck not the CPU.

    As to multi-card performance, the FX suffer more drop off than intel with dual highest end GPU's, either on stock will deliver terrible performance.
  9. mocchan said:
    Yes, exactly.

    yea got mines at 4.7GHz
  10. I have my 8120 at 4.7 ghz and I don't have a game that runs the cpu at 100% with 2x 6970

    stock 8120 is pretty slow tho, the fx cpus take off around 4.0 ghz, even so the 5770 will run without bottlenecking the stock 8120.
  11. OC the 8120 and focus on a good single card solution, i.e 7970 or 7950. The 5770 is the bottleneck.
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