Does my cpu bottleneck my GPU during games e.t.c?

al10677

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Jan 24, 2013
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my system build (found in my saved builds hence the custom parts):

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: AMD FX-6300 3.5GHz 6-Core Processor (£95.99 @ Aria PC)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler (£25.45 @ Scan.co.uk)
Motherboard: ASRock 970 EXTREME4 ATX AM3+ Motherboard (£80.24 @ Amazon UK)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory (£39.99 @ Dabs)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive (£52.74 @ CCL Computers)
Power Supply: Corsair Builder 600W 80 PLUS Certified ATX12V Power Supply (£54.98 @ Novatech)
Optical Drive: LG GH24NS90 DVD/CD Writer (£14.99 @ Novatech)
Operating System: Microsoft Windows 7 Home Premium SP1 (OEM) (64-bit) (£69.94 @ CCL Computers)
Other: Bitfenix Outlaw usb.30 case (£34.96)
Other: XFX FX-795A-BC (£230.99)
Total: £700.27
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-03-03 14:48 GMT+0000)

I was wondering if my FX-6300 Cpu was bottlenecking my 7950, i really have no idea if it is or not, the thought actually occurred to me when i was playing BF3 and Far cry 3 and i noticed my fps wasnt as high as i had seend in benchmarks people had done with a 7950 :??: Thanks for all your help and BYE! :hello:

 
Keep in mind that most benchmarks for BF3 (and similar) are done in controlled environments with no multiplayer because of it's inconsistency, and also are generally done with incredibly top end hardware otherwise to ensure that other factors don't interfere with the results as much as possible.

I've always found a good way to test for CPU being the issue is to run a benchmark with no anti-aliasing on, get your min/max/average scores. Then crank up the anti-aliasing and re-run the same test. If you see that you min stays about the same but your max and average drop it's a good indication that during times of low FPS that it's not the video card slowing it down (pointing to CPU). If all of them drop pretty consistently then it's probably not the CPU.

The reason that works is that things like resolution and anti-aliasing are almost exclusively done on the video card with very little (if any) impact to the CPU. It's the same reason when benchmarking CPU's generally the tester will disable all anti-aliasing and use low resolutions to ensure the video card is never slowing down how fast the CPU can pump through the scene.