Run SVPmark and post results here. Looks like your videocard have some bolttle-neck.
This is just too proof my OC because svp mark didnt detect it.
Test summary
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Date: 2016-01-30T14:24:01
CPU: Intel Core i5-2500K @3300 MHz [4 threads]
GPU: NVIDIA GeForce GTX 970 [ver.361.75]
Mode: FHD + GPU [9 threads]Overall scores
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Synthetic CPU: MC1862
Synthetic GPU: MG3226
Real-life: FG2554Details: synthetic
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CPU: compose (single-threaded): 675
CPU: compose (multi-threaded): 2203
CPU: search (single-threaded): 489
CPU: search (multi-threaded): 1613
GPU: system -> GPU transfer: 1326
GPU: GPU -> system transfer: 1590
GPU: calculations: 3483
GPU: total score: 8212Details: real-life /FHD
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decode video: 14.29x (343.1 fps)
48 fps - vectors search: 1.36x (65.4 fps)
60 fps - frame composition: 3.56x (213.4 fps)
48 fps - [SVP] fastest: 5.81x (279.1 fps)
48 fps - [SVP] simple 1: 4.15x (199.3 fps)
60 fps - [SVP] good: 2.17x (129.9 fps)
60 fps - [SVP] high: 1.74x (104.6 fps)
60 fps - [SVP] highest: 0.79x (47.7 fps)
72 fps - [SVP] simple 2: 3.84x (276.4 fps)
For example I hear couple times from SVP users about PCI-E x1 mode instead of PCI-E x16.
I can assure you that is not the case. I think I would notice that my card is in 1x mode simply by low fps in games.