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2 ATI HD Radeon 6990's In Crossfire Experienced Experts Only - Page 2

post #11 of 56
SB @ 4.5+ will ease up some of the tension.

That much gpu horsepower will bottleneck...there's no escaping it.
I myself experience it on a daily basis, though it's not too painful a hit.
post #12 of 56
Thread Starter 
Quote:
Originally Posted by Levesque View Post
CPU speed, BCLK and RAM speed are the thing making the biggest difference in my experience. And watercooling. Don't expect crazy OC on air.

x16 vs x8 doesn't really make a major difference.

The best thing to do is to flash the BIOS of the 6990s to 1.25v, OC trough CCC (and not using Afterburner). But if you go to 1.25v, you need to watercool those cards.

An i7 2600K at 5.3-5.4 with an Asus Maximus IV, with RAM OC to DDR3-2133 or DDR3-2400 with tight timings will give you great results for a good price.

If money is burning a hole in your pocket, then a 980/990 plus a great X58 motherboard, with a high BCLK is also another great/crazy fast alternative... but it will cost you dearly. And Bulldozer, SB-E are near... so X58 is not the wisest choice right now.

Personnally, I would wait for Bulldoze and SB-E. And until then, start planning and building a good watercolling system, that will follow your upgrade path trough the years..
Thank you so much for your advice!

Please explain what you mean by SB-E (Is this Sandy Bridge?) is this some new INTEL based CPU?

And yes the gpu's will be water cooled of course! i explained that in my thread.

As for the Ram i was thinking of getting The Corsair Dominator GT DHX Pro Connector CMGTX7
so im not worried about ram .
post #13 of 56
Sorry to say this but i'm very surprised you cheaped out with that CPU with such expense on GPU horsepower, you really need a better CPU to be honest, and overclock the hell out it to remove the bottleneck.

But i guess Bulldozer is in your future which will certainly change everything for you. With the cards you have to remove the bottleneck you would need a substantial overclock on a BD CPU and running eyefinity resolutions.
 
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post #14 of 56
Quote:
Originally Posted by jblanc03 View Post
Thank you so much for your advice!

Please explain what you mean by SB-E (Is this Sandy Bridge?) is this some new INTEL based CPU?

And yes the gpu's will be water cooled of course! i explained that in my thread.

As for the Ram i was thinking of getting The Corsair Dominator GT DHX Pro Connector CMGTX7
so im not worried about ram .
Pro tip- Ram will effect less than 1fps if running 1600 or even 2133. Most modern systems are not bottlenecked at all by ram but by the HD and CPU. With a SSD the HD is no longer an issue but you still lack the CPU part.

I use GTs for benchmarking and for looks. I would highly recomend saving the cash on ram and just buy some nice high end g.skill if your using the x6 (1600 cl7) or if BD (2133 low CL)
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post #15 of 56
Quote:
Originally Posted by jblanc03 View Post
Thank you so much for your advice!

Please explain what you mean by SB-E (Is this Sandy Bridge?) is this some new INTEL based CPU?

And yes the gpu's will be water cooled of course! i explained that in my thread.

As for the Ram i was thinking of getting The Corsair Dominator GT DHX Pro Connector CMGTX7
so im not worried about ram .
Yes a new intel cpu arriving later this year/early next sb-e is second generation sandybridge although only expected to provide a minimal increase in performance, over current sandy cpu's. Ivy bridge is the one to wait for if you can 2012.
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post #16 of 56
Thread Starter 
Quote:
Originally Posted by yanks8981 View Post
If you do upgrade, a good 2500K will suffice. Don't go get a 990X for 1000 dollars and think its necessary.
Thank you.
post #17 of 56
Thread Starter 
Quote:
Originally Posted by Vagrant Storm View Post
...just OC as much as you can while keeping the temps down. There is no magic CPU clock speed that will remove the bottle neck. It likely will always be there, but you can reduce it some by overclocking. You sound like you have at least a rudamentary knowledge of overclocking at least. If not there are a lot of guides out there.

Find the max and if for whatever reason you don't think you need it 24/7 or if the temps are too high for your comfort level just back down some.

You could try disabling two cores in the X6 to get some more MHz of it as well. Currently a quad core is all that is needed for gaming.
Yes ive tried that with my current CPU setting it to only 4 cores.

I see what your saying but i keep hearing different CLock speeds from different people and im wondering if they have even actually practiced what they preach!

some say at leaset 5ghz some say at least 4.1...blah blah blah

Im just trying to find somone with moreless the same specs as me and the same situation. I figured someone out there reading this forum would come along.
post #18 of 56
Are you running your 2x6990's at 1080p??? If that's the case then I suspect your CPU will be limiting you no matter how fast you manage to get it- so you want a i5-2500k or i7-2600k at 5ghz.
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post #19 of 56
Quote:
Originally Posted by jblanc03 View Post
Yes ive tried that with my current CPU setting it to only 4 cores.

I see what your saying but i keep hearing different CLock speeds from different people and im wondering if they have even actually practiced what they preach!

some say at leaset 5ghz some say at least 4.1...blah blah blah

Im just trying to find somone with moreless the same specs as me and the same situation. I figured someone out there reading this forum would come along.
Why are you asking these questions? You had already made a thread yesterday saying your getting a Bulldozer and overclocking it to 5Ghz.
More than enough people gave you feedback in that thread:-

http://www.overclock.net/water-cooli...ozer-5ghz.html
 
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post #20 of 56
Quote:
Originally Posted by jblanc03 View Post
Please explain what you mean by SB-E (Is this Sandy Bridge?) is this some new INTEL based CPU?
SB-E is the replacement for the current "enthusiast" platform X58. SB-E processors are based on the same architecture as the normal LGA1155 SB processors but lack the integrated GPU and will feature BLCK overclocking (at least to some degree) and 6 cores on the higher end models. (read, SB with more cores and better OC options)

SB-E will use the X79 chipset mobos with LGA2011 and the platform with the CPUs should be out by the end of the year.
 
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