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Written by Austin Downing   
Thursday, 17 November 2011
Table of Contents: Page Index
EVGA GeForce GTX 580 Classified: Overclocked
VGA Testing
DX11: Aliens Vs Predator
DX11: Crysis 2
DX11: BattleForge
DX11: Lost Planet 2
DX11: 3DMark 2011
DX11: Unigine Heaven 2.5
Final Thoughts and Conclusion

Overclocking Methodology

The Microsoft DirectX-11 graphics API is native to the Microsoft Windows 7 Operating System, and will be the primary O/S for our test platform. DX11 is also available as a Microsoft Update for the Windows Vista O/S, so our test results apply to both versions of the Operating System. The majority of benchmark tests used in this article are comparative to DX11 performance, however some high-demand DX10 tests have also been included.

According to the Steam Hardware Survey published for the month ending May 2010, the most popular gaming resolution is 1280x1024 (17-19" standard LCD monitors). However, because this 1.31MP resolution is considered 'low' by most standards, our benchmark performance tests concentrate on higher-demand resolutions: 1.76MP 1680x1050 (22-24" widescreen LCD) and 2.30MP 1920x1200 (24-28" widescreen LCD monitors). These resolutions are more likely to be used by high-end graphics solutions, such as those tested in this article.

In each benchmark test there is one 'cache run' that is conducted, followed by five recorded test runs. Results are collected at each setting with the highest and lowest results discarded. The remaining three results are averaged, and displayed in the performance charts on the following pages.

In order to get the highest stable overclock, my preferred method is to slowly increase the core clock speed by 10MHz and make five runs through our Crysis 2 benchmark. This creates enough stress to quickly discern if the overclock is stable, and if so I continue increasing the overclock by another 10MHz until NVIDIA's Forceware driver's crash. From that point I fine tune my overclock to get the most stability out of the system.OC-Overclocked_Info.jpg

After much deliberation I finally settled on 940MHz at 1.3v as the highest fully stable overclock that I could attain. Although this voltage is high for the speeds reached the Classified was designed to handle the higher voltages that are needed for record breaking speeds attained using extreme cooling solutions such as LN2 and Liquid Helium .

It should be noted that since no software will correctly advertise the voltage being used by the Classified I used a multimeter to attain the actual voltage of the Classified while overclocking.

Intel P67 Test System

DirectX-11 Benchmark Applications

  • 3dMark 2011
  • Crysis 2
    • Ultra Settings (Ultra Quality, 4x AA, DX11, Edge Blur, Hi Resolution Textures)
  • Aliens vs Predator
    • Extreme Settings: (Very High Quality, 4x AA, 16x AF, SSAO, Tessellation, Advanced Shadows)
  • BattleForge v1.2
    • Extreme Settings: (Very High Quality, 8x Anti-Aliasing, Auto Multi-Thread)
  • Lost Planet 2
    • Extreme Settings: (16x AA, Very High Shadow Detail, High Texture, High Render, High DirectX 11 Features)
  • Unigine Heaven Benchmark 2.5
    • Extreme Settings: (High Quality, Exteme Tessellation, 16x AF, 8x AA)

Video Card Test Products

Card ASUS GTX 580 EVGA GTX 470 SC EVGA GTX 460 SC XFX 5970 EVGA GTX 580 Classified EVGA GTX 580 Classified Overclocked
GPU Cores 512 448 336 3200 512 512
Core Clock (MHz) 772 625 763 735 855 940
Shader Clock (MHz) 1544 1250 1526 N/A 1710 1880
Memory Clock (MHz) 4008 3402 3800 4000 4212 4212
Memory Amount 1536 MB GDDR3 1280 MB GDDR5 1024MB GDDR5 2048MB GDDR5 3072MB GDDR5 3072MB GDDR5
Memory Interface 384-bit 320-bit 256-bit 512-bit 384-bit 384-bit

Disclaimer: Although we have pushed our card as far as we are able, your milage may vary based as each chip has its own characteristics.



 

Comments 

 
# beastgodrilla 2011-11-18 11:12
I just bought mine from newegg. Sold out everywhere.
Based on newegg reviews owners got 900-920 mhz at default volt. I'm hoping to get the same. Extra 20 to 40mhz for a 0.2 volts extra is too much. Did toy try to oc without volt tweaking?

Can't wait to bench mine.
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# beastgodrilla 2011-11-18 11:13
* did you try to oc without voltaze tweak?
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# 1000 watts!?Farnsworth Worthington 2011-11-19 15:25
For the good of humanity, you must test this card and see if it can actually draw 1000 watts of power.

More seriously, I doubt you could get to 1000 watts without those liquid-He/Ni cooling ideas. Still, if you could get it to 600 or 700 watts using air or water, that would be amazing. It's already drawing more power than most people's entire systems - it'd be both humorous and educational to see if it could outdraw most enthusiast systems.

Anyway, another enjoyable article. You guys run an excellent operation here at BMR.
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# RE: Beast, 1000 WattsAustin Downing 2011-11-19 22:19
I did not test it at stock voltage as my goal was to see how far this card would go at full tilt.

I can not test for anything over the power draw I had on during this test due to thermal constraints. Even so during our test I was drawing almost 500w just for this card.

Thank you for the compliment it means a lot to know that our readers appreciate our work.
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# RE: EVGA GeForce GTX 580 Classified: Overclockedclaydough 2011-11-28 00:26
I was hoping to see more reviews of this card! Thanks!
Nice to see an unashamedly "enthusiast" review.

Seems a little late to the party ( evga ). I can't see getting the classified when Kepler is around the corner now ( the first round of consumer cards and then the enthusiast cards soon after )
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# kepler probably in Aprilgodrilla 2011-11-28 04:45
I believe southern islands b4 kepler by a few months. Rumors have it because intel delayd ivybridge to april and kepler has many design wins with ivy that the launch will also be in april. Expect an appearnace @ CES 2012.

FYI Even if you wants to buy this gpu you can't it has bin sold out since launch and available in limited quantaties. Meaning when kepler hit I should have no problem selling the thing due to the limited quantities and demand @ a good price. Besides how would I play skyrim with all the hd mods out there already as well as bf3 @ max!
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# gtx 680 what not in 2013godrilla 2011-11-28 08:19
Based on todays kepler roadmap leak the high end kepler gpu out late 2012 or early 2013
#m.tweaktown.com/news/21713/rumortt_nvidia_s_28n m_desktop_gpu_roadma p_revealed_no_high_e nd_geforce_card_unti l_2h_2012/index.html

I hope not another fermi
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# Hmm..Greg 2011-11-28 11:59
I get 930x2300 from stock GTX 580 with 0.1vcore increase and 870x2300 at stock volts. I see no real reason for the Classified tbh...
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# RE: EVGA GeForce GTX 580 Classified: OverclockedJackNaylorPE 2011-12-04 14:16
Isn't 940 / 772 a 21.76% % OC ? not 17.88% ....that would be 797.5 stock speed
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# RE: RE: EVGA GeForce GTX 580 Classified: OverclockedAustin Downing 2011-12-04 15:49
Actually you do 772/940 to find the amount of performance difference. Which equals .1787 or 17.88%
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# RE: RE: RE: EVGA GeForce GTX 580 Classified: OverclockedJohn Naylor 2011-12-22 14:17
Nope.....by definition the denominator is the reference. Ya math doesn't work .... 772/970 = 0.7958, meaning the stock card is 79.58% of the OC'd card.

OC is like over speed limit.....if ya going 10% over the 60 mph peed limit, that's 1.10 x 60 or 66 mph ....66/60 = 1.10 or 10% over speed limit

% Overclock = 100 x (OC Speed / Stock Speed - 1)

100 x (940/772 - 1) = 21.76%

Or another way ....

% OC = (OC speed - Ref Speed) / Ref Speed
(940 - 772) / 772 = 21/76 $ same answer
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