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hd 6990 questions

post #1 of 11
Thread Starter 
I am looking at getting a 6990 this christmas and I have a few questions. I have already done as much research as can be done about power consumption and whether or not my PSU can handle it so Im not discussing that anymore. My first question is:
Is it possible to get true reference cards? by that I mean cards made by AMD not just ref PCB. I have seen GTX 560s that were actually made by nvidia at best buy and I always see them in the reviews but i can't seem to find where you can buy one.

Second:
I was reading a review by anandtech and they were talking about 70db under load. Is that really how loud they get? I have heard that they are loud but not 70 db loud. It it is true that not necessarily a deal breaker but I would prefer that it not be that loud.
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post #2 of 11
You cannot get factory reference cards from ATI. I prefer Sapphire cards tho if you want an opinion on that.

Under full load, mine can get faily noisy to be quite honest. You won't ever see 100% fan speed though unless you set it there. At 100%, its very very loud, let me tell you.

Have you considered W/c?

Hope this helps.
Cheers!
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post #3 of 11
Not sure about the reference design question with AMD myself.

As to the noise, yes they are very loud when the fan is up full tilt. Although under headphones it won't matter, or you could turn the down to manageable levels. Personally i'd not buy a 6990 now, since the 7xxx series is coming before christmas.

EDIT: Scratch the 7xxx as it's been delayed to 2012. I totally forgot.
Edited by Mhill2029 - 11/8/11 at 10:50am
 
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post #4 of 11
You may be able to find an AMD one, however it's going to be very hard to find. There is absolutely no point though, since all 6990s are reference PCBs. Yes they do get very loud.

Also why do you think you need a new PSU? http://www.anandtech.com/show/4209/a...e-card-king/18 Keep in mind that power draw is taken at the wall too. You can get by on a 650W. Maybe running LinX and Furmark at the same time would cut it close but your power supply has over current protection, it will simply shut off and not cause any damage to anything if it gets overloaded. I would definitely try it before you go out and buy a new PSU.
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post #5 of 11
Thread Starter 
Thats what I am planning to to do and maybe later get a tx850 or antec cp850 so I can use the unlocked BIOS and do a little OCing but I don't think the antec will fit as it is a weird size. Every one of the reviews come up with under 550w total system power but they all "reccomend" a 750w PSU and Newegg recommends an 850w.
Also what on average do you get for 3dmark06 scores? I am hoping to break 40k at 18k now with 5770.
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post #6 of 11
Yes, they're very loud on load and it's a horrible disadvantage.

Keep in mind your CPU is going to be bottlenecking the hell out of that 6990, so personally it sounds like a waste of money.
    
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post #7 of 11
Quote:
Originally Posted by DSP1 View Post
Thats what I am planning to to do and maybe later get a tx850 or antec cp850 so I can use the unlocked BIOS and do a little OCing but I don't think the antec will fit as it is a weird size. Every one of the reviews come up with under 550w total system power but they all "reccomend" a 750w PSU and Newegg recommends an 850w.
Also what on average do you get for 3dmark06 scores? I am hoping to break 40k at 18k now with 5770.
On average would be 35-37K.

HWBOT world record 43,549 http://hwbot.org/hardware/videocard/radeon_hd_6990/
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post #8 of 11
Thread Starter 
How do you come to that conclusion? Guru of 3d and anandtech both used quad core first gen i7s will little to no OC and had no bottleneck issues and my 1090T will beat both those cpus stock clocked in any benchmark.
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post #9 of 11
My old Phenom II X4 @ 3.75 GHz bottlenecked the hell out of my 5970. The 6990 is a much faster card so the bottleneck will be more pronounced, regardless of your slightly higher overclock. AMD CPUs bottleneck multi-gpu setups.

Proof:

My Phenom II 940 @ 3.75 GHz


My i7 950 @ stock (3.06 GHz)


Both tests done with a 5970 @ 850/1200. The only other difference between the setups is DDR2-1066 vs DDR3-1600, but that would account for a 5% difference, at the most.
    
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post #10 of 11
Thread Starter 
your comparing 8 logical to 4 physical cores. So maybe the x4 bottleneck but I'm running an x6 at 4ghz not 3.75ghz. Also you can't compare the 5970 and the 6990 they are different series, different architectures and completely different GPUs.
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