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AMD FX-8120 - Am I going to bottleneck?

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September 28, 2012 2:11:24 AM

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.

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September 28, 2012 2:19:45 AM

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.
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September 28, 2012 3:05:31 AM

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.
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September 28, 2012 3:19:30 AM

thanks for your input guys i'm grateful
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September 28, 2012 3:19:08 PM

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
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September 28, 2012 6:22:18 PM

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: 
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September 28, 2012 6:24:26 PM

mocchan said:
Key word, OC'd :lol: 

yea there not meant to be run stock :) 
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September 28, 2012 6:27:21 PM

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

Yes, exactly.
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September 28, 2012 6:29:38 PM

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.
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September 28, 2012 6:30:36 PM

mocchan said:
Yes, exactly.

yea got mines at 4.7GHz
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September 29, 2012 7:27:32 AM

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.
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September 29, 2012 3:14:07 PM

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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