AMD Crossfire Advice

Endeavor01

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Sep 15, 2015
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Hello, I currently have a Radeon R9 390 in my build with a motherboard that supports crossfire. My friend is trying to sell me his used R9 290x for $225. Here are my concerns:
1: The 290x runs extremely hot, 91c I believe, would the lower stream processor usage from scaling down with the 390 reduce that heat?
2: Would the 4GB of Vram make any difference in 1080p gaming versus if I were to buy a second 390 instead?
3: Are there any known issues with crossfire with newer cards and older cards?
Thank you :)
 

Endeavor01

Reputable
Sep 15, 2015
112
0
4,710


16gb ddr3 2133
Fx 8350 at 4.5
R9 390
750w semi modular psu
2x 120gb SSDs in raid 0
2x Wd Black 500s in raid 0

Thank you for the reply, as you can see I'm a bit of a power user :p in games like wolfenstein the new order I average 40 fps and same with many areas in fallout 4.