SAPPHIRE TRI-X OC r9 290 low fps on BF3, Far Cry 3, Team Fortress 2 ETC.?

i noticed that while plying anygame even if i get low fps i notice that my vcore 1 temps get really hot sometimes around 71*C and that make my cpu temps to go up. i checked to make sure that the temps werent the one that were giving me low fps so i monitored themm while playing so i noticed the temperature dont go up till like 10 min into the game and my fps is low from the start so the temps have nothing to do with me getting low fps but now i have 2 problems low fps and overheating vcore 1 which causes my cpu to heat up even if i have good airflow in my pc.

yo i did everything you did also same problem. i have a question do u have the same processor because i thing it the cpu i want to get a intel i5 but dont know if i should i really dont know what to do at this stage

Let me throw a few suggestions out. Please run 3dmark and tell me the scores of the 3 tests.
Plz check ur bios and see that it is detecting all 8 gigabytes memory, and that ur bios does indeed say dual channel. It sounds to me like its in single channel.

Download a program called furmark and run it in max rez for a few mins and see if ur gpu artifacts.
It might be that all you need is a windows format.

As for me, I still achieve a good 7896 in Firestrike in 3Dmark (newest one) and I get 50.1fps in Heaven with all extreme set, 61.7fps with the default extreme preset. 54.8fps in Unigine Valley Extreme HD, and the latest Elemental demo, I got about 30-45fps, just like this guy:
https://www.youtube.com/watch?v=3HoFWXIPZNE
and his PC seems to run fine according to his other videos...

i have been doing research and everyone that has this problem has the exact same cpu and gpu i called asus about my vcore and how it gets hot they said it could be my psu or some bios setting i have a 750 w psu this is my second psu since the other one i had i sold and its the same problem and i told them about the low fps incase they knew something they said its my gpu or cpu but they said to contact the manufactures but i am stuck right now. it sucks since all i wantd to do is game with my friends and i cant since some games r unplayable and i wasted over $1600+ so far .

You ever find a solution? the problem still occurs for me in BF3, BF4, and BFH MP on DX11 only...

As for me, I still achieve a good 7896 in Firestrike in 3Dmark (newest one) and I get 50.1fps in Heaven with all extreme set, 61.7fps with the default extreme preset. 54.8fps in Unigine Valley Extreme HD, and the latest Elemental demo, I got about 30-45fps, just like this guy:
https://www.youtube.com/watch?v=3HoFWXIPZNE
and his PC seems to run fine according to his other videos...

That's not good at all... you should be getting 10-11k in Firestrike with these specs.

I got 10k with my stock I7-4770 at 3.4GHZ and 290X and 290 are nearly the same really, while your CPU is superior, you should at least have 10k like me.

Overview

I have the same model (Sapphire Tri X r290) and very similar problems (huge/regular frametime/low fps spikes). I'm also getting 0xa0000001 and atikdag.sys BSODs with some versions of the CCC (see notes below). This is my first AMD card in about twelve years and I'm really disappointed so far. I've tried everything I can think of and if anyone knows how to fix this then please please help.

Main Issues:

Spikes in frametimes (low fps spikes) which brings overall benchmarks in Heaven/Valley/FarCry 3 etc really low. For example, in FC3 I'm getting in FPS average in the 30s and I'm only running at 1080p. In Unigen's benchmarks I get lows sometimes under 10fps even though most of the time it's high. I've checked out official benchmarks for my card and my performance is severely under par. Even with the exact same benchmark versions and CCC drivers I'm getting way lower fps. This card is meant to be for 4k gaming and yet it's not even performing good enough for 1080p (the monitor I have). My girlfriend even tried playing old games like the Sims 3 and it's really laggy.

AfterBurner logs:

https://dl.dropboxusercontent.com/u/137479361/r290%20benchmarks.png

Heaven Benchmarks

CCC 13.11 beta 9.5
https://dl.dropboxusercontent.com/u/137479361/Unigine_Heaven_Benchmark_4.0_CCC%2013.11%20beta%209.5.html

CCC 14.6
https://dl.dropboxusercontent.com/u/137479361/Unigine_Heaven_Benchmark_4.0_CCC%2014.6.html

Valley Benchmarks

CCC 14.4
https://dl.dropboxusercontent.com/u/137479361/Unigine_Valley_Benchmark_1.0_CCC%2014.4.html

CCC 14.6
https://dl.dropboxusercontent.com/u/137479361/Unigine_Valley_Benchmark_1.0_CCC%2014.6.html

MiniDump Crash Report

https://dl.dropboxusercontent.com/u/137479361/minidump%20crash.png



Specs:

AMD Sapphire Tri X r290 4GB
Processor: Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz (8 CPUs), ~2.7GHz
Memory: 18432MB RAM
Available OS Memory: 18424MB RAM
Page File: 7470MB used, 31432MB available
Windows Dir: C:\WINDOWS (windows 8.1)
DirectX Version: DirectX 11

CCC installs/drivers, my notes:

*14.6 beta rc2
-This has BSOD with atapiati errors (AMD process)
-It has some WD optimisations

*14.4
-I was running this (went back to it due to BSOD) Found in FC3 it was giving me only 30fps
-Tried benchmarking on both this 14.6rc2 and dropped back to 13.11 all had no impact on FC3.
-Check benchmarks
- Sound errors .. doesn't see any sound for amd hdtv 14.6 has updates to the hdmi audio driver and the audio driver will now go back up and see if I can put up with the BSODs (so long as the audio is ok )
-Another bsod due to atikmdag.sys (03/08/14)

*13.11
-no improvement in FC3
-this driver was used in benchmarking review of my gpu
-my benchmarks dont match up

Notes

To install drivers I've tried using CCC's full/clean remover (in Safe Mode) as well as DDU. I don't think the issue is to do with left over files. I've even repeated this process several times and one of the last times ran Driver Fusion to make double sure nothing was left over.

I attempted to find all the chipset drivers I could. My mobo maker Asus doesn't have any drivers for Windows 8.1 (for the P6T Deluxe V2). I went to Intel and downloaded what I thought are the right drivers. I also bought a premium version of Driver Fusion since it claimed to find chipset drivers that were missing. Once bought, it installed those drivers but nothing's improved.

Your cpu is a bit weak by 2014 standards, perhaps it bottlenecks certain games. Another thing I see is that your ram amount is unusual, 18GB? What's your stick configuration? I always use identical pairs of ram sticks, otherwise there could be problems with ram memory management.
You don't need 18GB of ram, I mean, 16GB is already too much, just use matching sets of sticks until you get 8GB+.
Another important thing is your mobo. If it's an old mobo, maybe it doesn't have PCIe 2.0 (let alone 3.0 or 4.0) slots. Also you should make sure your R9 290 is connected to a 16x slot. The chipset is also important, if it's an old chipset, perhaps it won't work great with new gpus. Another thing to check is the psu. The R9 290 is a power-hungry card, you'll need a 750W psu capable of feeding two pci-e 8pin connectors (each one can draw up to 150W if I remember correctly.). If your psu is weaker than that, then your R9 290 will be underpowered and your psu will suffer pointlessly.

I would try a different gpu, a different psu, a different combination of ram sticks (use only matching sets) a different cpu a different mobo and try installing Windows 7 instead. Not in that order necessarily.