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[Official] MSI GTX 680 Lightning Owners Club - Page 162

post #1611 of 7827
Quote:
Originally Posted by GnarlyCharlie View Post

I had the BIOS switch set to the LN2 position on the cards when I flashed to 3A, and it's showing that's the BIOS I have loaded, but I can't tell any difference from the 8A.It crashes identically to the crashes I had with 8A. I think I'm pretty much at the wall at 1377 in SLI. I can live with that, I've settled on a 1300/6800/Stock Voltage/ Auto Fan combo for daily driving.

Yeah testing some more, I just tried to test at 1452mhz and it black screened. Sometimes a TDR and sometimes a black screen, just depends on the mood of the card I guess LOL (my cards must be female wink.gif )
post #1612 of 7827
Quote:
Originally Posted by xoleras View Post

I think this is correct...
LN2 BIOS is around 50mV higher than the standard BIOS.....
Standard BIOS = 133% power
LN2 BIOS = up to 300% power
Standard BIOS = boost depends on your chip
LN2 BIOS = boost is always 1202
Standard BIOS = obeys driver voltages, goes up to around 1.325V with 2.2.3
LN2 BIOS = goes a bit higher, goes up to around 1.35 or 1.37V with 2.2.3
Increasing voltage always gives a noticeable increase in temperatures but its never bad with a single card. With SLI you'll become more temperature limited , depending on how close your motherboard requires the cards to be to each other...if you can place the cards far apart it may be a non issue.
Temps only differ between normal bios vs LN2 because LN2 always has like 50mV higher voltage, all other things equal (I think,...have to double check)

Aha, so LN2 BIOS isn't that much of a deal, i mean he allows just a little more voltage to push a little more Mhz into the gpu.

But on standard bios, what is the stable overclock (on most of the Lightning cards, i know this one depends, but the standard) vs. the LN2. In other words, how much Mhz LN2 pushes into the card ?

And the voltage is huge, compared with previous Nvidia cards, the 570 and 580. I remember my 570 had a maximum of 1.1v biggrin.gif

And that 300% power you can't achieve with a reference card ? And reference cards has by default 133% too ?
Edited by CalinTM - 7/28/12 at 2:25pm
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post #1613 of 7827
Is this with 3a bios?
post #1614 of 7827
Quote:
Originally Posted by xoleras View Post

I think this is correct...
LN2 BIOS is around 50mV higher than the standard BIOS.....
Standard BIOS = 133% power
LN2 BIOS = up to 300% power
Standard BIOS = boost depends on your chip
LN2 BIOS = boost is always 1202
Standard BIOS = obeys driver voltages, goes up to around 1.325V with 2.2.3
LN2 BIOS = goes a bit higher, goes up to around 1.35 or 1.37V with 2.2.3
Increasing voltage always gives a noticeable increase in temperatures but its never bad with a single card. With SLI you'll become more temperature limited , depending on how close your motherboard requires the cards to be to each other...if you can place the cards far apart it may be a non issue.
Temps only differ between normal bios vs LN2 because LN2 always has like 50mV higher voltage, all other things equal (I think,...have to double check)

Is this with 3a bios?
post #1615 of 7827
Quote:
Originally Posted by Rube View Post

Is this with 3a bios?

Its with either BIOS. There is no difference except with fan profiles at startup...they both have same voltage parameters.
post #1616 of 7827
Quote:
Originally Posted by CalinTM View Post

Aha, so LN2 BIOS isn't that much of a deal, i mean he allows just a little more voltage to push a little more Mhz into the gpu.
But on standard bios, what is the stable overclock (on most of the Lightning cards, i know this one depends, but the standard) vs. the LN2. In other words, how much Mhz LN2 pushes into the card ?
And the voltage is huge, compared with previous Nvidia cards, the 570 and 580. I remember my 570 had a maximum of 1.1v biggrin.gif
And that 300% power you can't achieve with a reference card ? And reference cards has by default 133% too ?

No, LN2 BIOS is a big deal. It is more stable than BIOS 1 for overclocking mainly because it prevents throttle mechanisms.

I'd say try BIOS 1 first and if that doesn't work for you, LN2 will definitely give you better results.
Edited by xoleras - 7/28/12 at 2:54pm
post #1617 of 7827
Let me repost this for clarification wink.gif Maybe Michaelrw can add this to OP as well..

I think this is correct...

LN2 BIOS is around 50mV higher than the standard BIOS.....

Standard BIOS = defaults to 1175mV with no overvoltage
LN2 BIOS = defaults to 1.21V with no overvoltage

Standard BIOS = 133% power
LN2 BIOS = up to 300% power

Standard BIOS = boost depends on your chip
LN2 BIOS = boost is always 1202

Standard BIOS = obeys driver voltages, goes up to around 1.325V with 2.2.3
LN2 BIOS = goes a bit higher, goes up to around 1.35 or 1.37V with 2.2.3

Standard BIOS= has kepler throttle and overcurrent throttle!
LN2 BIOS= has *disabled* all throttle mechanisms and is ultimately more stable with maximum overclocks


Kepler throttle is a mechanism on all 680s which lowers clockspeeds in 1 bin increments when you hit 70C ! This can lower the effectiveness of your overclock, although hitting 70c is NOT LIKELY with TF4 (with a good fan profile) it is possible. Thus LN2 prevents this. Increasing voltage always gives a noticeable increase in temperatures but its never bad with a single card. With SLI you'll become more temperature limited , depending on how close your motherboard requires the cards to be to each other...if you can place the cards far apart it may be a non issue.

Temps only differ between normal bios vs LN2 because LN2 always has like 50mV higher voltage, all other things equal (I think,...have to double check)

There is also no difference between 3a BIOS and original BIOS for overclocking, despite the initial belief. 3a has a less aggressive fan profile at startup.

AS always,

1)-overclocks depend on luck partially
2)-You should always use manual fan 70% or higher for maximum overclocks especially with voltage
3)-SLI will cause more temperature limitations (not an issue for single card)
4)-If using SLI create maximum distance between cards and improve case airflow
5)-Do not use auto fan for heavy OCs! ANYTHING 1350 or higher should be at least 70% manual fan
6)-SLI overclocks will NOT be as good as single card overclocks
7)- As always, voltage adds higher temps - for 24/7 find an overclock that uses the least overvoltage possible is the best bet IMHO


Happy overclocking wink.gif
Edited by xoleras - 7/28/12 at 2:57pm
post #1618 of 7827
Ugh, they just dropped the price on the lightning again on newegg, the day after I bought mine. back down to 569.

http://www.newegg.com/Product/Product.aspx?Item=N82E16814127693
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post #1619 of 7827
Quote:
Originally Posted by pwnzilla61 View Post

Ugh, they just dropped the price on the lightning again on newegg, the day after I bought mine. back down to 569.
http://www.newegg.com/Product/Product.aspx?Item=N82E16814127693

Contact their CS, they should be able to help you..

Or you can just buy another and return the initial card you bought (don't open it! They won't RMA without a restock fee if you do)
post #1620 of 7827
Quote:
Originally Posted by xoleras View Post

Contact their CS, they should be able to help you..
Or you can just buy another and return the initial card you bought (don't open it! They won't RMA without a restock fee if you do)



Yeah I am going to try customer support, it's not a total big deal, but it is an irritation if anything. I may just stick with, i've been waiting on this card for far to long. biggrin.gif
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Rigamormus
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