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Please need help with the 7870 Crossfire and some questions answered

Last response: in Graphics & Displays
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December 2, 2013 3:53:44 PM

hello fellow Tom's hardware members,

I have been a long time lurker first time poster. So Since black friday just happend I went ahead and build myself a new computer since my 6year old AMD Athlon 64 X2 6000+ Windsor 3.0GHz and 8800GT cant keep up anymore :(  Rest in peace you have given me lots of joy..
So now that thats over with here is my question (Spec. below) I want to run Crossfire but am not sure if its possible to use different brands from different retailers since the Sapphire I purchased is currently out of stock.
I already bought x1 Sapphire 7870(Core clock - 1050MHz | Memory Cloc 1200MHz (4.8Gbps) |Stream Processors - 1280 Stream Processors) since it came in a bundle and am looking to buy either the
XFX 7870Core clock - 1000MHz | Memory Cloc 1200MHz (4.8Gbps) |Stream Processors - 1280 Stream Processors
HIS IceQ 7870 Core clock - 1000MHz | Memory Cloc 1200MHz (4.8Gbps) |Stream Processors - 1280 Stream Processors
ASUS 7870Core clock - 1000MHz | Memory Cloc 1200MHz (4.8Gbps) |Stream Processors - 1280 Stream Processors

so in conclusion is it possible to use to different brands? If so are these cards worth getting or should I just wait till the Sapphire 7870 comes back on sell.

Thanks in advance!

side note - sorry for the wall of text and bad english(its not my first language)


MY RIG,
Case | Corsair Carbide Series 400R
Mobo | ASUS M5A99FX PRO R2.0
CPU | AMD FX-8350 Vishera 4.0GHz
Cooling | Cirsair H100
Ram | G.SKILL Ripjaws X Series 16GB (1866)
PSU | Rosewill 1000W 80Plus Bronze Certified
VGA | Sapphire 7870 GHz Edition 2GB
Monitor | Acer 24" 5ms LED
December 2, 2013 3:57:06 PM

I would go with the Asus. In crossfire, they will run at the slowest clock speed card, slowest memory card, lowest amount of memory card, etc. In the above ones, you're only loosing 50mhz. no big deal.
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December 2, 2013 4:03:11 PM

WOW that was fast thanks getochkn I knew I should have posted on here first and not on TL..
ok awesome, so I take it I can crossfire from two different retailers?
and one more question its more of a thought with both fans pointing down wouldn't the second Card get hotter and will that be a problem?
thanks again and sorry for the mass question galore
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December 2, 2013 4:03:22 PM

You can use any of those 2 cards in crossfire. They don't need to be the same brand, just the same model(7870):) 
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December 2, 2013 4:04:03 PM

awesome thanks Jay!!!!
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December 2, 2013 4:08:58 PM

If you can fit a case fan on the side panel of your computer case it would help with the temperatures. Good airflow in a case is always recommended:) 
What computer case do you have?
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December 2, 2013 4:20:48 PM

I would recommend adding one or two 140mm fans on the side panel. Or you can fit 120mm on the side if you wish instead.
It's a nice case and 2 AMD 7870's in crossfire will make a powerful gaming machine.
Happy gaming:) 
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December 2, 2013 4:25:25 PM

ya i was thinking about getting 2 140mm for the side just to get that extra cooling.
I sure hope soo cant wait to play BF4. the worst thing is I already bought the game ($19.99 I might add) just cant play it ugh..
but its not just a gaming rig its also for web design & dev, and photoshop suite.. thanks for the huge help..
ugh was just about to buy it and BAM all out of stock.. why you do this to me Newegg whyyyyyy!! lol
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December 2, 2013 4:31:20 PM

Bad luck:( 

I hope it's in stock soon for you:) 
If you want to boost your performance even more that CPU you have overclocks very well
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December 2, 2013 4:52:24 PM

ya I am looking into overclocking the 8350 to 4.5.
I read somewhere that it can be 5.0 stable
but i dont want to push it :) 
and ya same here, I sure hope it will be on sell soon :( 
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!