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SLI/CROSSFIRE questions

post #1 of 18
Thread Starter 
So if i get 2 of these cards: http://www.newegg.com/Product/Produc...82E16814130565

Do i need to plug 2 pci cords from my psu into both of them so i need 4 pci cords?

And will there be like micro stuttering and things like that?


I currently have a corsair cx600 600w power supply, that isn't enough to power all that, is it possible to buy another power supply to run the second card?

Or should i just buy a 800w like this:
http://www.newegg.com/Product/Produc...82E16817139025
Edited by Thiefofspades - 10/2/11 at 1:27pm
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post #2 of 18
Quote:
Originally Posted by Thiefofspades View Post
So if i get 2 of these cards: http://www.newegg.com/Product/Produc...82E16814130565

1. Do i need to plug 2 pci cords from my psu into both of them so i need 4 pci cords?

2. And will there be like micro stuttering and things like that?


3.I currently have a corsair cx600 600w power supply, that isn't enough to power all that, is it possible to buy another power supply to run the second card?

4. Or should i just buy a 800w like this:
http://www.newegg.com/Product/Produc...82E16817139025
1. Yes.
2. Subjective, some are more sentive to it. Some might not even notice.
3. Yes.
4. No.
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post #3 of 18
My question is, why not buy another GTX570 and SLI that?
post #4 of 18
Quote:
Originally Posted by DrCatHands View Post
My question is, why not buy another GTX570 and SLI that?
Because the 955BE is going to make it seem like a downgrade. Mine couldn't keep up with CF 5850's let alone SLI 570's.
post #5 of 18
Thread Starter 
So i should'nt get a 800w power supply then? And haven't actually bought a gpu mobo or cpu yet. So i need a motherboard that can support sli or crossfire and what cards for crossfire would i need?
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post #6 of 18
Quote:
Originally Posted by Thiefofspades View Post
So i should'nt get a 800w power supply then? And haven't actually bought a gpu mobo or cpu yet. So i need a motherboard that can support sli or crossfire and what cards for crossfire would i need?
Ah okay then, I was going to say that 955 would be a decent bottleneck. 800w is more than enough to run two 460s, your power supply now could do it as well. Why do you want to change to 460's from a 570 though?
post #7 of 18
Thread Starter 
Well i don't have a 570 yet, i only have the case, psu, hdd, ram, and cd dvd drive. So i wanted to do cross fire with 2 6850's but i'm not sure if my psu will run all that

Part list permalink / Part price breakdown by merchant

CPU: AMD Phenom II X4 955 Black 3.2GHz Quad-Core Processor ($111.99 @ Amazon)
CPU Cooler: Cooler Master RR-B10-212P-G1 76.8 CFM Sleeve Bearing CPU Cooler ($24.99 @ SuperBiiz)
Motherboard: Asus M5A99X EVO ATX AM3+ Motherboard ($132.99 @ TigerDirect)
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1600 Memory ($54.99 @ Newegg)
Hard Drive: Seagate Barracuda 500GB 3.5" 7200RPM Internal Hard Drive ($39.99 @ Newegg)
Video Card: HIS Radeon HD 6850 1GB Video Card (CrossFire) ($149.99 @ Amazon)
Video Card: HIS Radeon HD 6850 1GB Video Card (CrossFire) ($149.99 @ Amazon)
Case: Rosewill CHALLENGER ATX Mid Tower Case ($49.99 @ Newegg)
Power Supply: Corsair 600W ATX12V Power Supply ($78.47 @ CompUSA)
Optical Drive: Sony AD-7260S-0B DVD/CD Writer ($19.99 @ Newegg)
Total: $813.38
(Prices include shipping and discounts when available.)
(Generated 2011-10-02 17:11 EDT-0400)
Edited by Thiefofspades - 10/2/11 at 2:17pm
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post #8 of 18
Quote:
Originally Posted by Thiefofspades View Post
Well i don't have a 570 yet, i only have the case, psu, hdd, ram, and cd dvd drive. So i wanted to do cross fire with 2 6850's

Part list permalink / Part price breakdown by merchant

CPU: AMD Phenom II X4 955 Black 3.2GHz Quad-Core Processor ($111.99 @ Amazon)
CPU Cooler: Cooler Master RR-B10-212P-G1 76.8 CFM Sleeve Bearing CPU Cooler ($24.99 @ SuperBiiz)
Motherboard: Asus M5A99X EVO ATX AM3+ Motherboard ($132.99 @ TigerDirect)
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1600 Memory ($54.99 @ Newegg)
Hard Drive: Seagate Barracuda 500GB 3.5" 7200RPM Internal Hard Drive ($39.99 @ Newegg)
Video Card: HIS Radeon HD 6850 1GB Video Card (CrossFire) ($149.99 @ Amazon)
Video Card: HIS Radeon HD 6850 1GB Video Card (CrossFire) ($149.99 @ Amazon)
Case: Rosewill CHALLENGER ATX Mid Tower Case ($49.99 @ Newegg)
Power Supply: Corsair 600W ATX12V Power Supply ($78.47 @ CompUSA)
Optical Drive: Sony AD-7260S-0B DVD/CD Writer ($19.99 @ Newegg)
Total: $813.38
(Prices include shipping and discounts when available.)
(Generated 2011-10-02 17:11 EDT-0400)
CF 6850's will work but I highly recommend bumping that CPU up to a 1090T at least. I used to run a 955BE and it bottlenecked last generations cards at 4.0ghz. I think that power supply might be on the edge as well since the 6850 is recommended to have at least 500 watts. For CF I would grab an AX750 to be safe. What is your budget like?
post #9 of 18
Thread Starter 
Well i was hoping to not have to buy another psu but it does only have 2 pci power connectors, so i guess i have to get 4?
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I5-2500k @ 4.5Ghz 1.335v GIGABYTE G1.Sniper 3 Evga Gtx 680 4GB @ 1280Mhz 1.213v Samsung 30nm 8Gb @ 2133 10-10-10-25 
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I5-2500k @ 4.5Ghz 1.335v GIGABYTE G1.Sniper 3 Evga Gtx 680 4GB @ 1280Mhz 1.213v Samsung 30nm 8Gb @ 2133 10-10-10-25 
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PowerCaseMouseAudio
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MCP655 Variable with pump mod kit Xspc Rx360 Xspc Ex240 Multiport Bitspower 150 Inline Reservoir  
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post #10 of 18
Quote:
Originally Posted by Thiefofspades View Post
Well i was hoping to not have to buy another psu but it does only have 2 pci power connectors, so i guess i have to get 4?
You only need 2. Does the box say the amps on the 12v rail?
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