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Crossfire and coolers

post #1 of 5
Thread Starter 
This may be more appropriate in the AMD forum, but it's relevant to Nvidia to an extent. If I were to add THIS GPU to my rig, which has one of THESE already, would they be compatible? And in general, in a crossfire or SLI setup, does the brand matter? E.g. adding a Sapphire card to an EVGA card? What about RAM? Does that need to be the same for all cards? And clockspeed?

Second, are aftermarket air coolers typically worth it? I'm running between 60 and 65 degrees under load, which is bit warmer than I'd like (and 10 degrees hotter than the CPU) with only a single fan on the stock cooler and am somewhat worried that a second GPU would restrict airflow and increase the load temperature.

And, just so you know, no, I am not going to upgrade to whatever Nvidia card is better according to you guys and benchmarks. I've got a 1080p monitor at 60 Hz, and $320 for a pair of 7850s is cheaper than $400 for a 7970 and one whole gigabyte of VRAM isn't worth that much. When I upgrade to a 1440p 120 Hz monitor, the GTX 900 or Radeon HD 10000 series will be out.
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post #2 of 5

You can get that card and they will work. RAM can be different but you can only use the lowest amount. Clock speeds can be different and syncing them with a quick OC is easy.

Yes aftermarket coolers are better if your gpu is anywhere below 80C under load it is doing its job well. Don't mind that it is higher than the CPU, it's like that for everyone. (I hope)

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post #3 of 5
I'm sure you already know the difference, and I dont mean this to patronizing, but it's Crossifre for AMD, SLI for Nvidia. They cannot interchange.

On the card compatabilities, yes they would work together. As for clock speeds and RAM, like Legonut said, you would have to run both cards at whichever was the lower of the 2.

Your temps will rise a bit for introducing a second card. And if you plan to overclock them, even more so. The top card more so still, because some of that heat of the bottom card will rise and the top card will be pulling that in.

The XFX card is only 30 dollars more than the PowerColor, are you set on that one? you wouldnt have to worry with clock speeds or RAM if you bought a matching XFX card. Just an observation.

As for the aftermarket air coolers, I can't comment, as I'm cooling both of my 6850's with Antec Kuhler 620's.
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post #4 of 5
Thread Starter 
Crossfire is my go-to term because I use AMD GPUs and I like the term better. They're basically the same thing though, right? Or does SLI have different rescrictions on differing RAM, clocks, etc.?

No need for air coolers then. I've overclocked to 1050 MHz and CCC won't let me go higher.
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Kingston Blu Red - 2x4GB ADATA XPG - 2x4GB Crucial M500 960GB Samsung 840 250GB 
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Triumvirate
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Osmium
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EleMINT 24
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CPUMotherboardGraphicsGraphics
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RAMRAMHard DriveHard Drive
Kingston Blu Red - 2x4GB ADATA XPG - 2x4GB Crucial M500 960GB Samsung 840 250GB 
Hard DriveCoolingCoolingCooling
WD Scorpio Blue 1TB Cooler Master 212+ PNY Quadro 600 blower Corsair H55 + Kraken G10 
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Windows 10 Pro ASUS VE247H - 1080p Gateway FPD1960 - 1280x1024 Rosewill RK9000I - Cherry MX Blue 
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Rosewill HIVE 650W Fractal Design Arc Mini R2 Razer DeathAdder 2013 CyberPower 1500PFCLCD 
CPUMotherboardRAMHard Drive
AMD A10-7870K ASRock FM2A88X-ITX+ G.Skill Ripjaws X - 2x4GB @ 2400MT/s Samsung 840 120GB 
CoolingOSPowerCase
Evercool EC-HPS-810CP Windows 7 Pro 64-bit PicoPSU-120-WI-25 Mini-Box M350 
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post #5 of 5
You might push it higher with MSI Afterburner.

Term wise, they are essentially the same thing. But there are differences.
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