Will my rig be stable with Crossfire?

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jambajamba

Commendable
Jul 11, 2016
2
0
1,510
Hi guys

This is my first post, apologise if its in the wrong section. Question is: With the new addition of my second GPU- 1) Will i struggle on CPU performance at 4.2 GHZ? 2)Is it best to restore bios overclock to stock 3.5? 3) Should i upgrade my PSU?

PC Build Date: May 2015
Motherboard: Gigabyte 990FXA-UD3 AMD 990FX (Socket AM3+)
CPU: AMD Piledriver FX-6 Six Core 6300 Black Edition OC 4.2ghz (original was 3.5)
RAM: 32GB DDR3 (Upgraded from 16gb)
CPU Cooling: Alpenföhn Brocken CPU Cooler
Cooling: 6 Fans
GPU: Powercolor Radeon R9 270X
PSU: Corsair 750 Modular

i have just brought an extra GPU: Sapphire R9 270X so i can crossfire with my current 270x.

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Now i know some of you may say just upgrade to parts, that is fine, but i want to make the most of my current rig as i dont want to upgrade as it will l be hard to sell the parts i have.
Note: There is bants between my 2 mates and there rigs. They have pipped me with the 8 core (either 8320 or 8350) and the GPU (r9 380 4gb ram) I plan to gain the upper hand. I will upgrade my CPU maybe next year.
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Thanks in advance
 
Solution
n0ns3ns3
You rig supposed to be stable with those two cards.
Each card is under 200W so under full load it's under 400 watts.
CPU and the rest is well under 200 watts.
So you are totaling at 600 watts without GPU overclock under extreme synthetic load. I guess (it's a guess) that your rig will be around 500watt under gaming.
What is the exact model of the Corsair PSU you have ? CX line is not really built for continuous high load.
And no, you should not down clock your CPU. It's already far from the best performer, so down clocking it will severely impact the gaming performance
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n0ns3ns3

n0ns3ns3

Illustrious
May 25, 2016
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You rig supposed to be stable with those two cards.
Each card is under 200W so under full load it's under 400 watts.
CPU and the rest is well under 200 watts.
So you are totaling at 600 watts without GPU overclock under extreme synthetic load. I guess (it's a guess) that your rig will be around 500watt under gaming.
What is the exact model of the Corsair PSU you have ? CX line is not really built for continuous high load.
And no, you should not down clock your CPU. It's already far from the best performer, so down clocking it will severely impact the gaming performance
 
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Solution
Ecky

Ecky

Illustrious
Feb 3, 2013
7,592
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38,960
I probably would've recommended selling your existing card and grabbing a Radeon 480X. For around $200, you get a card that's more than twice as fast, and draws about the same power as one of your cards. Crossfire often doesn't work, or doesn't scale very well (that is, the second card won't even come close to doubling performance). That said, your system should work as configured.

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J

jambajamba

Commendable
Jul 11, 2016
2
0
1,510
Thanks guys above with your fast reply. I guess I hindsight I should have sold my card and upgraded but as a casual gamer. It's not the end of the world i guess but don't want to blow up my system. And I do have a cx line psu but I guess I can upgrade them all one at a time. Have a nice day all.
 
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