AMD FX-8320 + Radeon r9 280x + ASUS M5A78L-M is it in hardware?

Question

Iron

Hi all. In the fall, I assembled a PC for myself.
Processor - AMD FX-8320 - 5.5k (today 9.1k)
Video card - Gigabyte Radeon r9 280x - 12k (today 19k)
Motherboard - ASUS M5A78L-M - ~1.5k
Power supply - Thermaltake 600W
RAM - 8gb
At first I was extremely happy " powerful" assembly. Now I want to cry.
Performance seems to please, everything almost flies, almost happiness, until you want to play games. Video cards on native coolers heat up to 70+ degrees. Wach Dogs lagged wildly at the minimum wage - half the battle. NFS Hot Pursuit - 2010 game lags on minimum settings. In Dying Light - as soon as you find yourself in the city - it's just unbearable to play.
Tell me guys, what could be the problem? What to do? Which way to look? I can't believe that a video card for 12 (19) thousand - so fails. Or a processor that rams all i5th benchmarks - slag. Maybe it's incompatibility or the cheapest motherboard is a bad idea?
UPD

Answer 1

a) Look at the subject of throttling with cpuz speccy sandra utilities, whether the video and processor frequencies are lowered when heated. Compare by tests with similar assemblies. Adjust your power settings for maximum performance.
b) non-gaming motherboard, no PCI-E 3.0 support
c) AMD not for gaming

Answer 2

It's simple - throttling. Videos from this series are terribly hot, and you have 45 degrees at idle ... At 290x itself. On stock cooling, it warmed up to 94 degrees, then the frame rate dropped. But my system is faster - percent, SSD in RAID0 and 290x, of course, faster. Therefore, I did not particularly notice on FullHD. As a result, I still set the coolness to another, for peace of mind.
It looks like the card is really sagging. Conclusion: change the cooling, change the card to a non-reference, think over the cooling in the case.
ps I, of course, own i5, so I can be biased ;) , but! AMD is really not for gaming, in this generation. Does it in synthetics - yes, in some specialized programs - yes, but for games it is much more profitable than Intel. See those tests.

Answer 3

Solved a problem? If not, then there is a problem in poor motherboards with a 78 chipset, they all heat up in 10 seconds when using such a video card and the hell starts, buy yourself an M5A97 R2.0 for example and good luck with 60 fps)

Answer 4

Update BIOS Firmware! I had such a problem with WILD lags and no services could help.