Will the FX 8350 bottleneck 7970 CF?

I want to know wether the FX 8350 bottleneck the 7970 when crossfiring? This is my build:



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[b]CPU:[/b] [url=http://pcpartpicker.com/part/amd-cpu-fd8350frhkbox]AMD FX-8350 4.0GHz 8-Core Processor[/url] ($189.99 @ Newegg)
[b]CPU Cooler:[/b] [url=http://pcpartpicker.com/part/cooler-master-cpu-cooler-rr212e20pkr1]Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler[/url] ($31.99 @ Newegg)
[b]Motherboard:[/b] [url=http://pcpartpicker.com/part/asrock-motherboard-990fxextreme4]ASRock 990FX Extreme4 ATX AM3+ Motherboard[/url] ($139.99 @ Amazon)
[b]Memory:[/b] [url=http://pcpartpicker.com/part/corsair-memory-cml8gx3m2a1600c9w]Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory[/url] ($59.48 @ Amazon)
[b]Storage:[/b] [url=http://pcpartpicker.com/part/hitachi-internal-hard-drive-0f10381]Hitachi 500GB 3.5" 7200RPM Internal Hard Drive[/url] ($54.98 @ Outlet PC)
[b]Storage:[/b] [url=http://pcpartpicker.com/part/pny-internal-hard-drive-ssd9sc120gmdfrb]PNY XLR8 120GB 2.5" Solid State Disk[/url] ($104.70 @ Mac Connection)
[b]Video Card:[/b] [url=http://pcpartpicker.com/part/msi-video-card-r7970lightning]MSI Radeon HD 7970 3GB Video Card[/url] ($496.48 @ SuperBiiz)
[b]Case:[/b] [url=http://pcpartpicker.com/part/cooler-master-case-sgc1000kwn1]Cooler Master Storm Enforcer ATX Mid Tower Case[/url] ($64.99 @ Newegg)
[b]Power Supply:[/b] [url=http://pcpartpicker.com/part/corsair-power-supply-cx500]Corsair Builder 500W 80 PLUS Bronze Certified ATX12V Power Supply[/url] ($29.99 @ Newegg)
[b]Optical Drive:[/b] [url=http://pcpartpicker.com/part/lg-optical-drive-gh24ns72]LG GH24NS72 DVD/CD Writer[/url] ($18.98 @ Outlet PC)
[b]Total:[/b] $1191.57
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[i](Generated by PCPartPicker 2013-02-26 05:33 EST-0500)[/i]


in games that are more cpu dependent to make things happen, yes. but a good oc will deal with that.

Mate most games today use only 2-3 cores max so 8 cores aint enough?

lol that's the point really, they only use up to 4 threads/cores in the most cases. hence the need for an oc in high perforamce cases. if they actualy used all 8 cores most of the time the work load would be spread out, which would mean all the cores in use would have to do less work to keep up. but that's not the case yet anyway.

running games with lots of models, particles, and anti-aliasing is a real cpu intesive workload and when you start doing this at higer resolotion like 1080p+ that work load just got a hell of lot more intense.

Ill be playing at 1920X1080P and mostly with 4XAA.Any bottleneck?

Also is the build pretty good?Or should i get the 3570K????

yeah the build is solid and well balenced, just make sure you take advantage of that aftermarket cooler and wack a small oc on it. (considering your using a flagship mobo with a good powerphase on it aswell)

the only things i would definately change, is the ssd. anything from mushkin, samsung, adata, intel, kingston, corsair is good and the capacity should do you fine.

and the power supply, you are using a very power hungry gpu and cpu so a 750 or ideally 850 otherwise your going to cook that 500 very quickly lol

also at the price point i would take a look at the corsair 200R or the 300R cases, the 200R will do the same job but a bit better and the 300R has some good cable manegment. but the case you have picked wi do the job

Ill definetly look into it! Also I won't be Xfiring right now so you think a 650Watt is enough??

you could go intel if you like as the 8350 does trade blows with the 3570k, but you will have upgrade that PSU either way as that gpu is power hungry, and your going to have to overclock either way to get the most out of that gpu which means more power comsumption

Then FX as it's good. 650Watt is enough??

if your going to Xfire 850W no questions asked, if not 750W min im afraid. i would grab the best psu you can cause it will last you a long time and it will cost you less in the long run through A: not having to upgrade the psu in future B: if you skimp out on it, and it goes pop on you, it will most likely take another component with it.

i would look at seasonic, corsair AX series, Antec, and Rosewell and XFX. they are reliable for psu's and getting 80+ PSU will mean your components are more likely to live longer in general. through voltage stability under load and even power through-put.

i would also say if the psu is going to stretch your budegt that much, axe the HDD for now, grab it a later date and use the difference for the PSU. the PSU is just the one thing you really dont want to cheap out on, it could cost you more in the future in the form of headachs lol and part replacements. 

FYI:  there are several types of usage for a CPU in gaming.

  • CPU reliant games: poorly coded in general.  These are always CPU bottlenecked... no matter what CPU or GPU you get.
  • Huge resolution (like 5000+ by 3000+): the higher your resolution, the more monitors your screen is stretched across the more CPU power you're gonna need to push out the pixels.  That said, your fx8350 should be fast enough for this to not be a significant issue... 
  • Low resolution: low resolution settings lean more on the cpu then higher resolution settings... so you'll see some CPU bottlenecked numbers from some low res settings.

In all other situations, a GPU will bottleneck a gaming system.  No matter how fast, no matter how many in xfire... as long as the cpu is in the i3/a8-10/phii x4/FX min range the gpu will be the bottleneck in every other situation.


I think the question here is if the PCIe lanes of the 8350 will bottleneck the 7970s. On an Ivy Bridge/Z77 setup, you have 16 PCIe lanes, which is enough for 1 high end graphics card, or with slightly less performance, 2-way SLI/Crossfire. The 8350, to my knowledge, would work well with at most, 2-way Crossfire, but no more than that; ti isn't a PCIe monster like the Sandy Bridge E CPUs that have 40+ PCIe lanes. The 8350 would be great for a single or dual card setup, but don't exepct to get any more than that without a bottleneck.

Guys I'll only do a 2 WAY crossifire Also with my build(Above) will the Corsair VS 650 Be enough or the CX 600??


no it wont, iv already explained why


probably not.  


The 7970 is a power hog... generally I think most people overestimate their system power draw by a LOT when picking out PSUs... that said this isn't the case here.  Think of an Oc'ed 7970 sucking down around 350W, two in xfire will suck down 700W, your CPU will suck down 125W prior to overclocking... overclocked it can get up to about 200W... that's 900W easy without even trying.  You'd likely need a 1000W min powersupply... likely a deal more just to keep things comfortable.