Ah I see, makes sense then, I was just trying to imagine a couple of builds that would require the power. I run a 3x Eyefinity group as well for gaming on my rig, im running Dual HD 6990's with a rosewill Lightning 1300 PSU to power the whole machine. That corsair my Co-Worker/friend has in his rig right now and its a kick *** PSU from what hes told me and ive seen.Hey....don't I know you? LOL
The type of system as you know is a benchmarking , 3 x screen Eyefinity gaming and a 4 x screen productivity setup. The reason for 3 separates PSU' is The Corsair AX1200 (Tektronics build) is a tremendous, single rail, ultra low ripple clean power PSU. It by itself is not enough though. I found these 500w FSP Group PSU's with the same qualities, that I can run off a different circuit. 2.2kW is pushing it for a single wall.
Jc..... u keep mentioning sli no...................... 7970s go crossfireThis is what you should get:
Motherboard - You have 5 options:
http://www.newegg.com/Product/Product.aspx?Item=N82E16813157336 (not sure how well this WS motherboard will work, so I would avoid it).
Power Supply: Corsair AX1200i - 1200W is enough for 3 7970s. In the future, you wont want to buy another 7970 for quad SLI. There will be better technology that will outperform your 3 card configuration with 1 card (2 generations from now - 22nm)
Case: Any full tower of your choice.
Having built a Quadfire machine every nine months or so since 2008, watching it evolve, and having a 4 x 7970 in front of me for 'ultra resolution' gaming and benching I have to disagree slightly with your assessment of the scaling of the fourth card as "horrendous' JC and replace it with 'pretty good'. The 4th 7970 is good for 24 FPS in Heaven 4.0, takes Dirt 3 from 121 to 144 FPS @ 5760 x 1080, is the difference between being able to play Metro 2033 on high or very high @ 5760 x 1080 and the same scenario in other games/benches etc etc.The CPU is plenty. The problem you have right now, is the case, power supply, and motherboard. The motherboard does not have enough PCIe slots to run quad xfire or even tri xfire. The case you have doesnt have enough of those slots where the rear IO/exhaust of the card is, I forgot what they are called. The PSU cant support power hungry 7970s in quad xfire either. I don't recommend quad xfire since scaling is horrendous. Even nVidia has begun to given up on quad SLI (at least in their advertising/demoes) since they find the scaling to be horrible. At the resolution you are running, tri xfire will be enough. As for the CPU though, dont upgrade from a 3570K to a 4770K. The i5 can handle any game for the next 3-5 years fine. As for the 3930K, that CPU is 2 generations old, and will be refreshed soon. That will be a worthy upgrade since it will gain you better performance due to the extra 2 cores. Plus, the X79 platform is meant for multi GPU configurations.
Yeah Nvidia has quietly let quad SLI go bye -bye, or at least not be promoted. It does okay in some benchmarks, but benchmarks like Heaven, 3DMark11 and the like are designed to give you full credit for all the hardware you have on board. Things change substantially when you switch to actual games.Well, quad SLI doesnt scale well. xfire on the other hand, may be different.
It is possible, but nVidia doesnt advertise it since scaling is bad and they dont want to optimize it. Tri and quad xfire setups are definitely improving with AMD.Even on the nvidia site they don't say their 80 series of cards (ie the gtx 780 or 680) supports quad where as the dual gpu ones can. Odd because I swear it's possible because I've seen systems with them.
JC713 that's why I personally like amd cards better now. Tri and quad is a lot easier to manage IMHO and just comes ready for extreme setups. It gets some odd results when going tri and quad setups on the amd cards. Let me see if I can find the review I was thinking of and post it, but tons hardware had an odd result that I found interesting.
The issue with quad-SLI is generally down to the need to qualify the platform with the cards from what I understand, which in turn stems from Nvidia's edict that SLI can be enabled only by x16 or x8 lane connectivity and the load balancing requirement for Nvidia's QA.It is possible, but nVidia doesnt advertise it since scaling is bad and they dont want to optimize it. Tri and quad xfire setups are definitely improving with AMD.