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[Official] MSI GTX 780 Lightning Owner's Club - Page 272

post #2711 of 5050
Quote:
Originally Posted by Noddy93 View Post

Hello guys smile.gif

I have got some stability issues that i would like to talk to you about smile.gif so here comes a wall of text smile.gif

First of all i have a little question, when i push the card with my overclocking, and i have a crash sometimes my card just underclocks to 575MHz and no power consumption at all, like 5-15%. and whatever i do, i can't reset the card at all. Only thing that helps is to restart the computer. but it sucks to do this every time i get into an unstable area. Also this is not only when the card crashes, but also if i just start firestrike, it can in the meantime have underclocked itself.

okay, but here is my real issue:

I have the following setup:

CPU: I5 2500k 4.7GHz
MOBO: MSI Mpower z77 1155 socket.
Graphiccard: MSI gtx 780 Lightning
RAM: 16GB corsair vengeance 1600MHz CL9
Cooling: H80 watercooling for CPU
PSU: Corsair TX 850W

Okay, so my card has 2 bios, the normal stock bios, and the Skyn3t LN2 rev.4 Hynix BIOS. i have set a goal for myself, i want to push this card to 10.000 score in firestrike, and right now i got a max of 9876 points.


But with the LN2 skyn3t bios, i can only achive something around 9500.

This i don't understand.
Because the core clock frequency is like 1200MHz on the LN2 and in the stock normal bios i can only push the card to max of 1135MHz. And i don't even know why my clocks is so low in the first place. The card doesn't get high temps at all. 70 or so max. and is unstable in every thinkable way. whenever i try to take a Firestrike test, the card can sometimes get though with a low clock, and then the test after it crashes or underclocks like 10 sec into the test.

I have got 75.9% ASIC

The stock bios is running on this:
+63mV
109% limit
+140MHz core clock
+180Memory clock.

The second bios: (skyn3t LN2)
+125mV
300% limit
+200MHz (unstable like hell, no artifacts, card doesn't get hot at all, sometimes firestrike just crashes)
+250MHz memory clock

This is what i can give you atm that i thoink you might want to know. im in LN2 here:


and a comparison from my 3Dmark firestrike tests is like this from the two different bios:

http://www.3dmark.com/compare/fs/1492717/fs/1578431

Please help me sort out my problem, i have overclocked CPU's for a while but started with this Lightning for GPU overclocking.

Please help me find out why i haven't reached 10000 with the LN2 bios when i can reach 9876 with the stock bios, and please help me sort out why the clock isen't stable at all.

Best regards Noddy;)

It sounds to me like it needs more voltage. It seemed that my card was perfectly stable with just +100 on the voltage and then metro 2033 crashed a couple of times on me. I have had to push the voltage to +120 and 1.7 volts on the memory. If you want to eliminate the voltage question, you can crank the voltage up further or just go straight to +200 and see how it fares for clocks and stability. Your current ln2 clocks should be possible with enough voltage.
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post #2712 of 5050
I just picked up 2 780 GTX Lightning LE's

I am currently overclocked to 150+ Core on stock voltage which boosts to 1200mhz in games.

Im bench stable at 200+ Core in Valley which boosts about 1250mhz.

The issue isnt stability its heat on the top card. The bottom card is 20-25c lower than the top one. I changed cases to the FT02 and managed to get from 100 to 150 core in games without hitting 95c.

Im using standard bios with 109% power target.

Any advice on getting this SLI any higher in games/benches?
post #2713 of 5050
Quote:
Originally Posted by FxOne View Post

I just picked up 2 780 GTX Lightning LE's

I am currently overclocked to 150+ Core on stock voltage which boosts to 1200mhz in games.

Im bench stable at 200+ Core in Valley which boosts about 1250mhz.

The issue isnt stability its heat on the top card. The bottom card is 20-25c lower than the top one. I changed cases to the FT02 and managed to get from 100 to 150 core in games without hitting 95c.

Im using standard bios with 109% power target.

Any advice on getting this SLI any higher in games/benches?

It sounds to me like heat will be far more of an issue for your overclocks. To get further on your core, you will likely need to add more voltage which will further increase the heat. You sure that your fans are operating correctly? It seems strange that it would hit 95c on stock voltage.
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post #2714 of 5050
Quote:
Originally Posted by Bishop07764 View Post

It sounds to me like heat will be far more of an issue for your overclocks. To get further on your core, you will likely need to add more voltage which will further increase the heat. You sure that your fans are operating correctly? It seems strange that it would hit 95c on stock voltage.

Fans are on a custom profile to ramp up to 100% at 90c.

When i say stock voltage i mean i dont change volts i just use 109% power and +200 Core.
post #2715 of 5050
The heat difference between the 2 cards is 40c! when Card 1 hits 95c and throttles down.
post #2716 of 5050
Id say this card performs quite badly in SLI mode. the air coming out the top of the case is cold everywhere except the vent on the card in GPU slot 1.
post #2717 of 5050
Quote:
Originally Posted by FxOne View Post

The heat difference between the 2 cards is 40c! when Card 1 hits 95c and throttles down.

Wow that is all kinds of wrong. There is no no way that there should be anywhere near that temperature. I could see maybe 10 degrees maybe 15 if sandwiched right next to each other. What is GPU 1 temp if GPU 2 is completely removed from the computer? Have you tried switching the cards a around to see what kind of temps that you get?

If you are still having those extreme temperature issues after trying these things, I would think that you would need to try replacing the GPU thermal compound and reattaching the cooler to ensure proper contact with the GPU core. This would involve contacting MSI because it has a warranty void sticker on one of the screws on the back. It sounds like your cooler is not making proper contact with the GPU core.
Edited by Bishop07764 - 1/25/14 at 6:11pm
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post #2718 of 5050
Quote:
Originally Posted by Bishop07764 View Post

That's strange. It sounds like you have it set right. Try out Rbbys tool and see if that gets you anywhere. Let me know how the temps are once you get everything under water. thumb.gif Just in case, try maxing out your power limit too to see if that makes a difference.

Sli Water loop completed...updates will follow later!

**
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post #2719 of 5050
Quote:
Originally Posted by hoevito View Post

Sli Water loop completed...updates will follow later!

**
*

Wow! That looks awesome! However, I would move your connection from your CPU block to the other port on your gpu block. I don't think you will get adequate flow through your first gpu block otherwise. You could also add another bridge flow connector if you want to do it that way. I'm on my tablet right now or I would paste the pictures in. You can Google gpu block serial or parallel images to see what I am talking about.

Found the page that I was trying to reference earlier:http://koolance.com/help-video-block-connecting
Edited by Bishop07764 - 1/25/14 at 8:54pm
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post #2720 of 5050
So is there anyway for AB18 to apply the core voltage at startup when you go over 100mV using the Rbby tool?
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