Will a FX 8320 Bottleneck a GTX 780?

ThermalV · Jul 11, 2013

Is an 8320 with a GTX 780 totally crazy?
http://uk.pcpartpicker.com/p/1fzWV

PLEASE no Intel vs AMD discussions or demanding I choose Intel. This is purely a thought I had and want to see if there is any hard evidence of the 8320 bottle necking the GTX 780.

Greybush · Jul 11, 2013

Yes it will. what kind of monitor do you play on?

ThermalV · Jul 11, 2013

Greybush :

2560x1440

Eximo · Jul 11, 2013

Well you don't get PCIe 3.0 with AMD boards at the moment, so you'll lose a tiny bit right from the start.

ThermalV · Jul 11, 2013

Eximo :

Very few cards saturate PCIE 2.0 x16

Eximo · Jul 11, 2013

Agreed, but benchmarks do reveal a slight increase with PCI 3.0 over 2.0, probably just updates to the infrastructure that shave off some latency.

Intel God · Jul 11, 2013

Vishera wont bottleneck a single titan especially at that res

noob2222 · Jul 11, 2013

Eximo :

... really? ... and what benchmark would that be?

ok .. so the 7970 gained 1% wich could have been rounded up from 0.6% since they aren't decimals. almost all 18 games tested showed less than 1 fps difference.

as per the op's question, the 8320 will start to bottleneck with 2 - 780s at stock speed. overclock it to the 8350 speed and it will handle 2 cards without problems.

I run 2x 6970 cards with an 8120 @4.7ghz and no games push the cpu to 80%.

Intel God · Jul 11, 2013

noob2222 :

Sorry but that is incorrect. The FX 83xx will bottleneck a 2 card setup especially Wow, Skyrim, SC2

[img[http://media.bestofmicro.com/C/6/378870/original/image009.png[/img]

iam2thecrowe · Jul 11, 2013

noob2222 :

your cpu doesnt go to 80% because games cant take advantage of all its threads, load in games is to variable, it is only fixed function programs like video encoding where you will ever see an 8 core cpu near 100%. looking at your cpu useage is not an indicator of a bottleneck. To determine a bottleneck you start of at your desired in game settings and resolution. You then crank the resolution right back to 800x600 or something awefully low to take load off the gpu, if performance increases dramatically then its a gpu bottleneck, if no increase then cpu bottleneck.

iam2thecrowe · Jul 11, 2013

noob2222 :

your cpu doesnt go to 80% because games cant take advantage of all its threads, load in games is to variable, it is only fixed function programs like video encoding where you will ever see an 8 core cpu near 100%. looking at your cpu useage is not an indicator of a bottleneck. To determine a bottleneck you start of at your desired in game settings and resolution. You then crank the resolution right back to 800x600 or something awefully low to take load off the gpu, if performance increases dramatically then its a gpu bottleneck, if no increase then cpu bottleneck.

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Will a FX 8320 Bottleneck a GTX 780?

ThermalV

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Eximo

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ThermalV

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Intel God

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noob2222

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