how much is this chip bottle necking my performance

I have my friends rig and I know the chip is hindering its performance by at least 20% but if someone could give me a more exact estimate.

His setup is this::

PCPartPicker part list:
Price breakdown by merchant:

CPU: AMD FX-4100 3.6GHz Quad-Core Processor ($99.99 @ Newegg)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($29.98 @ Outlet PC)
Motherboard: Biostar TA990FXE ATX AM3+ Motherboard ($132.98 @ SuperBiiz)
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1600 Memory ($60.99 @ Newegg)
Storage: Samsung 840 Series 120GB 2.5" Solid State Disk ($104.99 @ Adorama)
Storage: Seagate Momentus XT 500GB 2.5" 7200RPM Internal Hard Drive ($124.99 @ SuperBiiz)
Video Card: Sapphire Radeon HD 7970 3GB Video Card ($289.99 @ Newegg)
Case: Antec Three Hundred ATX Mid Tower Case ($63.98 @ Newegg)
Power Supply: EVGA SuperNOVA 750W 80 PLUS Gold Certified ATX12V / EPS12V Power Supply ($79.99 @ Microcenter)
Operating System: Microsoft Windows 8 Professional (OEM) (64-bit) ($129.98 @ Outlet PC)
Total: $1117.86
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-08-17 23:04 EDT-0400)

I oc'd the chip to 4.7 GHZ atm but i know the chip is still bottlenecking the GPU to some extent, but again, not sure how much.
6 answers Last reply Best Answer
More about chip bottle necking performance
  1. Best answer
    About 27% or around that.
  2. so best thing to do is throw out the 4100 and buy a 6300, 8320, 8350 and call it a day. got it
  3. Exactly.
  4. how big would performance be between 8320 - 8350 for his 7970? im sure i can oc his 8320 to at least 4.5 but not sure with the evo 212
  5. The 8320 is basically a lower clocked speed 8350. If you get both at the same frequency, both should perform about the same.
  6. what is a cheaper upgrade just the 8320 is what I am thinking ~
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