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about to crossfire 6970s, have a few questions - Page 3

post #21 of 49
Thread Starter 
U know what that's exactly the board I was gonna buy but didn't on account I wanted to do a all black and red theme....then I saw the gigabytes ud5 and ud7 but I don't have a single clue about whats good with those guys,maybe ill just forget about the whole color blending deal and just buy the dam thing haha.Thats funny because ive been eyeing that m5a99x pro for a while now! So you think ill be ok with 8350 that board and 3 6970s? Iam gonna try it and whatever happens happens I don't care! lol
     
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post #22 of 49
Thread Starter 
Theres also another board I like - As rock fatality I think its called? Some people were saying the intel guys just need to justify spending more money on there cpu so they bash amd? I don't know? As long as I have decent performance I don't mind buying either brand.People also say the fx 6100 bulldozer is a complete failure, how its getting me 60 fps in every single game I play! Idols at 20 degrees and never goes over 35 during hours of gaming! its set to 4.2 ghz in auto tune and I know I never need to worry about it-how that's a failure is way beyond me:rolleyes:
     
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post #23 of 49
The FX-6xxx are decent but AMD really rushes the bulldozers. You'd really enjoy a Piledriver chip, they're much faster.

I'm a big AMD fan but I will admit that the Intel chips are faster class for class. Are they noticably faster without looking at the benchtest results? Not really, and many say that the 8 core piledrivers such as my 8350 are the fastest out right now and that programmers juat need to learn to utilize all the cores properly.

Gigabite makes a decent board. I prefer ASUS myself, they have a slightly higher QC rating and a higher user rating. I have never used an ASrock board, I've heard too many bad things about their longevity.

If you do opt for the ASUS pro, make sure you get the M5A99FX not the M5A99X ... The difference is the Northbridge chipset. The FX chipset is more performance oriented and will allow you to run multiple cards in 16x. You gotta look for those little details. I didn't and I bought the EVO that only allows crossfire in 8x. This isn't a big deal for me because the 7870 can only utilize about 8x anyways but it kind of puts a damper on future upgrades.
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post #24 of 49
Thread Starter 
So the fx990 chipset is what I need right? I don't mean to be an annoyance or anything but diffrences between 8320 and 8350? I think the 8320 is just clocked a little lower.Yeah u know iam not the type of person that does cpu benchmarks- I do however do gpu benchmarks all the time,iam sure the new veshara is faster I was just saying to someone like me if iam getting 60 fps and my graphics are always maxed out iam a happy man, I will pick one up just to try it- might as well go with the flasgship 8350
     
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post #25 of 49
Quote:
Originally Posted by Recursion View Post

I have just bought a 6950 but cannot unlock the shader. me too, I have a xfire 2x 6950 and my first is unlock to more shader. my psu is a 500 watt 80+ gold and my calculation is like this:

2x 200 watt xfire 2x gpu 6950
1x 150 watt cpu amd x2 phenom be 55
1x 50 watt fans and disks
======================================
600 x 0,90 efficiency = 540 watt maximum

that's a bit more but only about 10%. When you google for xfire 6950 you can see often 400 watt at full load. Hence a 500 watt is plenty let alone a 750 watt.


Your 500 watt 80+ gold PSU is rated at 500 watts total OUTPUT. So, according to your math, you could be drawing 600 watts out of the 500 watt power supply. That's 100 watts, or 25% over the rated power output. The 90% efficiency rating just means that to deliver 500W output, it's going to draw 500/0.90 = 555.55 watts from the wall = 500W DC output + 55.55 watts of wasted heat.

PSU are ALWAYS rated by power output, not power input.

Greg
post #26 of 49
Hello Greg,
yes your are right thanks for the clarification. But when it draw 600/0.90 watt from the power grid I'm wrong? Please don't try it yourself.
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post #27 of 49

Yeah, I wouldn't want a 500W continuous-rated PSU having 540W pulled out of it while I'm gaming. Granted, the PSU is designed to easily deliver 500W 24/7 if it's ever needed which means its peak is above 540W, but I have a small doubt in my mind that it's intended to be doing that every day.

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post #28 of 49
On the other side it's only 10% above and the 600 watt output which I wrongly take as input is also not from me but from the producer. How do they calculate the consumption? What is psu the use?
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post #29 of 49
On the other side it's only 10% above and the 600 watt output which I wrongly take as input is also not from me but from the producer. How do they calculate the consumption? What is psu the use?
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post #30 of 49
Quote:
Originally Posted by Recursion View Post

On the other side it's only 10% above and the 600 watt output which I wrongly take as input is also not from me but from the producer. How do they calculate the consumption? What is psu the use?

 

The producer? Who?

 

Who is "they"?

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Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
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Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
Mouse PadAudioAudio
Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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Reply
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Overclock.net › Forums › Graphics Cards › AMD/ATI › about to crossfire 6970s, have a few questions