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post #11 of 15
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thanks h3xus that makes the p8p67 even better for me lol it is very unlikely that i would have more than 2 cards ever at this time i dont think ill have more than a single card. a 5870 to me is more than enough from what i have seen with my business machine. if i decide that i need more power i would just buy a 5970 or the new 6990 if i suddenly had loads of cash laying around
    
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post #12 of 15
i recommend the asus p8p67 pro or the asrock extreme 4. the new asrock boards look really nice and are loaded with features for the price. its always better to buy a board that supports sli then to buy one that does not if you think you might upgrade. they dont cost that much more.
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post #13 of 15
Thread Starter 
the p8p67 does support crossfire just not as many cards i really see no need to have 3 of any of the new cards now thats just e-peen lol
    
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post #14 of 15
Quote:
Originally Posted by H3XUS View Post

@BigFrank. That's wrong.

Single card acts in x16. In Crossfire, or SLI, both cards will run in x8... HOWEVER, Sandy Bridge, and the P67 architecture is designed so that in SLI/Crossfire, the i5/i7 CPU will accelerate the bandwidth between both to reach the speed of x16 each. SO they can both run in dual sli "16x" *finger quotes*. It's the same speed. bit isn't ACTUALLY 16x. It achieves the same x16 speed per x8 PCIe, just using a different method, with the i5/i7 boost. Remember though.. this can only be done with Dual SLI/Crossfire, any more cards, and the situation completely changes.
Got any link on that I'd like to read up on that?
I had always though that by saying x8/x8 it was running the GPU's at 1/2 the x16 speeds.
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post #15 of 15
Here is a comparison chart to show you that the difference between x8 and x16 Crossfire is a measly 2 frames. This goes for the newest of the new cards too by the way. Our cards of today aren't even advanced enough to max out x8 completely yet. I won't expect larger differences (which still won't be a big deal) between the two until about mid-2012. Cheers.



@BigFrank
Here is the link: http://hardforum.com/showthread.php?t=1591268

The pcie 2.0 in p67 boards have bidirectional bandwidth witch allows acceleration for faster transfer rates.

E.g. x4 speeds on a P55 board will ramp up to x8 on P67. x8 on last gen boards ramps up to x16 equivilant speeds on P67. This is why the Z67 chipset is going to be fun. It will support x16 x16... With bi-direcional support.

Think of it as two hoses.. one hose is 8 inches, while the other is 16 inches.

The same amount of water is being dumped into each hose.

As the amount of water increases for both hoses, the 8 inch hose will start building up a little bit, while the 16 inch will be fine.

Now, think of the Asus p67 (I've only heard confirmed of asus having this tech) having this feature that uses the i5/i7 as a waterpump that attaches onto the 8 inch hose.

The x16 hose will still have absolutely no buildup of water

The x8 hose will have buildup, but has a waterpump to expel the water almost as fast as the x16 hose.

NOW... Over time.. there will be even more, and more water, and the hosepump for the x8 might only last one more generation before the x8 hose can't expel water NEAR as fast as the x16 hose.



For those of you who want "true" x16 x16 sli / crossfire.. Asus will be releasing their Z68 1155 chipset in Q4 2011. During this period of time, Nvidia, and AMD will be releasing their new 28nm GTX600 series (Keplar), and HD 7000 series (Southern Islands) GPU's. These gpu's will run 3 to 4 times faster than Fermi, and run much MUCH cooler.

I personally prefer running a powerful single card (tuning/overclocking). In this sense, my P67 PRO is perfect for me.
Edited by H3XUS - 4/1/11 at 12:43pm
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Black Pill
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intel i7 3770k ASUS P8Z77V-PRO EVGA GTX-980 Corsair Dominator Platinum 16Gb (2x8Gb) 
Hard DriveHard DriveHard DriveOptical Drive
128Gb OCZ Vertex IV SSD 1Tb WD Gold HDD 1.5Tb WD Caviar Green HDD ASUS CD/DVD +/-RW x24 
CoolingOSMonitorKeyboard
Corsair H80i Liquid Cooling Windows 7 Ultimate 64bit BenQ XL2410T 120Hz Logitech G710+ 
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Corsair AX850w Bitfenix Ghost Logitech G600 Steelseries H4 
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Logitech G35 Headset 
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512Gb Apple SSD None 2 Asymmetrical Fans OSX Mavericks 
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