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Crossfire HD7870 on asrock amd 970 extreme4

Last response: in Motherboards
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August 5, 2012 10:26:56 AM

Yes that should be perfectly possible as that motherboard supports Crossfire.
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August 5, 2012 10:36:01 AM

It supports but there is AMD 970 chipset. There is 8x8x8 (or 8x8 - not sure). I don't know what it stands for but I read that with 8x8x8 (or 8x8 - not sure) I'll get less performance. That's mean if I will install HD7870 (crossfire) I'll get less performance?

Thanks.
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a b V Motherboard
August 5, 2012 10:55:42 AM

Don't worry, technically there's no performance hit while running at X8 mode & technically there's no difference between PCIE 3.0 and PCIE 2.0 in real world perfromance, maybe you'll encounter 1% performance hit which doesn't affect real world performance.

But the cards will get bottlenecked by the AMD CPU in CPU intensive games, and you'll feel like that the HD 7870s are pretty useless, better go single card and switch to CF/SLI when you get a more powerful CPU.


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August 5, 2012 11:08:51 AM

Thank you. I have ordered these hardware's last week:

1) RAM: Corsair Vengeance DDR3 1600MHz 8GB TWINS RAM (CMZ8GX3M2A1600C9)
2) Optical Drive: Asus 24x SATA Desktop PC Internal DVD-RW Drive (DRW-24B5ST)
3) GPU: Asus ATI HD7870 DC2 2GB DDR5 256bit PCI-E Graphic Card
4) CPU: AMD FX 4100 3.6GHz 4-Core Black Edition Socket AM3+ Processor
5) PSU: Cooler Master GX Lite Series 700W ATX Power Supply RS-700-ASAB
6) CASE: Cooler Master CM Storm Enforcer Mid ATX CPU Casing
7) Hard Drive: Western Digital Caviar Blue 500GB (16MB) SATA3 3.5 PC HDD WD5000AAKX
8) Asrock AMD 970 EXTREME4 Socket AM3 Motherboard
___________________________________________________________________________PRICE: $940 (around)

I won't overclock CPU and GPU.
I have chosen 700W PSU because I will install one more GPU after 1 year. I thought about 2nd HD7870.

Is this rig good for gaming?


Sorry for the wrong Forum. :) 
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a b V Motherboard
August 5, 2012 11:18:25 AM

It's good, but CM GX series are crappy PSUs and have some issues with CF/SLI
Get this one if possible, it's modular will help you for better cable management and proper airflow.
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Nice Case!

This rig just needs an SSD, see if you can afford Samsung 830 128GB

Again, what's important about this whole matter is that you can't trust AMD with CF, you'll get some bottlenecks in specific games. See if you can switch to Intel they have the most powerful gaming chips.



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August 5, 2012 11:27:25 AM

Too late already, I can't change my order :( 

Never mind, I'll stay with it. At least I can update it anytime. :) 

Do I really need SSD? Is it fine without it?
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August 5, 2012 11:28:56 AM

Best answer selected by maximzaika.
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a b V Motherboard
August 5, 2012 11:37:07 AM

Yes it is fine, but SSD makes it very fast to access programs, faster load times of games, high transfer rates of Read/Write.
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a c 328 V Motherboard
August 5, 2012 5:12:36 PM

This topic has been closed by Nikorr
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