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Aircooled 780 HOF/Classi/Lightning vs a Watercooled 780 reference :/

post #1 of 9
Thread Starter 
Hey all,

So let's all just assume the new 9000 series (or whatever we're supposed to call it now) from AMD flops, and I have a urge to push a 1080p 120hz monitor for BF4. My budget can only extend so far, and in Australia prices are already very steep, so here's my options:

A) Purchase a non-reference 780 such as the Galaxy HOF, EVGA's Classi, or MSI's Lightning, overclock it, and leave it to cool on air. Or;

B) Purchase a cheaper reference-based 780 model, overclock it, and put it under water.

Which option is going to yield a higher, more stable framerate for a 1080p 120hz monitor?

Cheers for reading and (hopefully) replying thumb.gif
    
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post #2 of 9
honestly, unless you have an top 1% binned chip OCing on water doesnt matter much as you will be held back by the silicon on 99% of GPUS before the temps

unless of course, you just want really low temps, then water it is!
post #3 of 9
My reference card benches at 1450 and is game stable at 1420. A water reference card can go a long way but classys are the currently kings of the 780s since they can do 1400+ with no effort.
post #4 of 9
There's a voltage mod you can do through afterburner now only with the reference 780s and titans. You can push up to 1.3v and if you were under water temperatures would not be a problem. The other more expensive cards can go that high also but at those volts cooling and noise could become a problem for everyday use. Overclocking is always luck of the draw but if it were me i would just go with reference and put it under water.

There is also a new application for the voltage controller on reference cards that allow up to 1.6v, although i would highly recommend not going that high on a reference pcb. I have pushed to 1.375 and reached almost 1400mhz.

Edit: I didn't realize this when I was replying, but you can thank the guy above (Zawarudo) for the voltage adjustment application used on reference boards with the MCP4206 Controller thumb.gif
Edited by Shultzy - 9/13/13 at 12:55am
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post #5 of 9
Thread Starter 
Quote:
Originally Posted by oicwutudidthar View Post

honestly, unless you have an top 1% binned chip OCing on water doesnt matter much as you will be held back by the silicon on 99% of GPUS before the temps

unless of course, you just want really low temps, then water it is!

So for overclocking, Silicon quality is always the most important factor? This leads me towards a HOF or Classi (even though they both have elpida memory these days)
Quote:
Originally Posted by Zawarudo View Post

My reference card benches at 1450 and is game stable at 1420. A water reference card can go a long way but classys are the currently kings of the 780s since they can do 1400+ with no effort.

Are those clocks typical for reference cards like yours? I know the silicon lottery is always in play, but do you feel you did particularly well in it? tongue.gif

Quote:
Originally Posted by Shultzy View Post

There's a voltage mod you can do through afterburner now only with the reference 780s and titans. You can push up to 1.3v and if you were under water temperatures would not be a problem. The other more expensive cards can go that high also but at those volts cooling and noise could become a problem for everyday use. Overclocking is always luck of the draw but if it were me i would just go with reference and put it under water.

There is also a new application for the voltage controller on reference cards that allow up to 1.6v, although i would highly recommend going that high on a reference pcb. I have pushed to 1.375 and reached almost 1400mhz.

Edit: didn't realize this but you can thank the guy above me for the voltage adjustment application for reference boards thumb.gif

What graphics card components does the 1.3v mod stress? I'm just curious as to whether someone would be able to hold 1.3v on a card strapped to a AIO kit (I have a few of those things spare).
    
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post #6 of 9
Quote:
Originally Posted by fleetfeather View Post

So for overclocking, Silicon quality is always the most important factor? This leads me towards a HOF or Classi (even though they both have elpida memory these days)
Are those clocks typical for reference cards like yours? I know the silicon lottery is always in play, but do you feel you did particularly well in it? tongue.gif
What graphics card components does the 1.3v mod stress? I'm just curious as to whether someone would be able to hold 1.3v on a card strapped to a AIO kit (I have a few of those things spare).

I would recommend a full cover block for pushing those volts. It will stress the vrms and if not properly cooled they could fail leaving you with a dead card. Raising the volts will raise the temperature on your chip as well as your vrms. 1.3v may be ok for a few benches but I wouldn't recommend it for 24/7 use or long gaming sessions.
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post #7 of 9
Thread Starter 
Quote:
Originally Posted by Shultzy View Post

I would recommend a full cover block for pushing those volts. It will stress the vrms and if not properly cooled they could fail leaving you with a dead card. Raising the volts will raise the temperature on your chip as well as your vrms. 1.3v may be ok for a few benches but I wouldn't recommend it for 24/7 use or long gaming sessions.

yep makes sense to me. cheers for the input

edit: bumping to the top for moar opinions wink.gif
    
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post #8 of 9
The 780 HOF uses hand picked chips which is what led me to buy it. Everyone that I've seen so far is hitting close to or just over 1300 MHz on stock voltage. I can run 1320 MHz stable in 3dmark, 3dmark 11, Heaven, Valley, Metro 2033, Skyrim and Far Cry 3. In Far Cry 3, I originally dropped the core to 1254 MHz as I was running 90c at 1320. But I removed the DX sound card that was blocking 75% of the HOF's #1 fan and temps dropped by 5-6c in the benches.

The only issue with the HOF is it needs a custom bios. The stock bios doesn't allow overclocking until the hyper boost button is pressed. At that point, fans ramp up to 100% and it's loud. Using Skyn#t's bios, I can set a custom fan profile in Precision and OC without hearing loss. smile.gif

And the afterburner mod for more voltage does work with the HOF but the LLC mod to keep it set does not.
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post #9 of 9
Quote:
Originally Posted by Shultzy View Post

There's a voltage mod you can do through afterburner now only with the reference 780s and titans. You can push up to 1.3v and if you were under water temperatures would not be a problem. The other more expensive cards can go that high also but at those volts cooling and noise could become a problem for everyday use. Overclocking is always luck of the draw but if it were me i would just go with reference and put it under water.

There is also a new application for the voltage controller on reference cards that allow up to 1.6v, although i would highly recommend not going that high on a reference pcb. I have pushed to 1.375 and reached almost 1400mhz.

Edit: I didn't realize this when I was replying, but you can thank the guy above (Zawarudo) for the voltage adjustment application used on reference boards with the MCP4206 Controller thumb.gif

You're welcome smile.gif
Quote:
Originally Posted by fleetfeather View Post

So for overclocking, Silicon quality is always the most important factor? This leads me towards a HOF or Classi (even though they both have elpida memory these days)
Are those clocks typical for reference cards like yours? I know the silicon lottery is always in play, but do you feel you did particularly well in it? tongue.gif
What graphics card components does the 1.3v mod stress? I'm just curious as to whether someone would be able to hold 1.3v on a card strapped to a AIO kit (I have a few of those things spare).

My ASIC is like 68% lol. Anything over 1.25v starts to stress the VRMs, I'm just lucky in the fact that if I burn my card out I can just buy another at trade prices.

I reckon 99% of 780s will be faster than mine, just nobody really has the stones to push theirs as far as I have.
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