970 water cooled overclocking

[Jaqen]

Hi, I am hoping there are a few members here with some time to advise on a problem I have been having..

 

The short version is that with a modded bios for my dual 970's (palit jetstream) once I hit 130% power my pc crashes no DP signal to monitor and a hard reboot is required.

 

The default bios had a power limit MAX of 111% and a max clock 1304mhz (although the highest clock speed on the table was actually 1493mhz)

 

default bios:

base cc- 1170mhz

boost cc- 1304mhz

base mem- 1793mhz

voltage- 1.262

power- 111%

 

custom bios:

base cc- 1170mhz

boost cc- 1304mhz

base mem- 1793mhz

voltage- 1.312v

power- 150%

 

Notice in the modded bios I didn't change the clocks! this is because once the power limit was increased both cards automatically boost to 1493mhz WITHOUT SOFTWARE OC (highest boost state in bios)

 

Any Ideas? my thinking at the minute is that the 2 6-pin power connectors to each card cannot supply the Watts necessary to go beyond 128%

 

If anyone would like to check out my bios I have included a link to my google drive where you can download it, I know there are some very serious overclockers on this forum so hopefully I have just set something wrong.

 

1.3v is the bios I am currently using

https://drive.google.com/file/d/0B-Nz1L7y2ABOLW9uTTVtYkhUVlk/view?usp=sharing

 

 

 

 

[Zayzo]

Shouldn't need over 130%. I get over 1600+ on the core while using 105-109% power(on water).

 

Edit: Also, 1.3v is way more than you'd actually need for 1500+

[arniks8]

Shouldn't need over 130%. I get over 1600+ on the core while using 105-109% power(on water).

Edit: Also, 1.3v is way more than you'd actually need for 1500+

Not true about 1.3v, not every GPU overclokcks that good and 1.3v gives more OC on some GPU.

[arniks8]

Hi, I am hoping there are a few members here with some time to advise on a problem I have been having..

The short version is that with a modded bios for my dual 970's (palit jetstream) once I hit 130% power my pc crashes no DP signal to monitor and a hard reboot is required.

The default bios had a power limit MAX of 111% and a max clock 1304mhz (although the highest clock speed on the table was actually 1493mhz)

default bios:

base cc- 1170mhz

boost cc- 1304mhz

base mem- 1793mhz

voltage- 1.262

power- 111%

custom bios:

base cc- 1170mhz

boost cc- 1304mhz

base mem- 1793mhz

voltage- 1.312v

power- 150%

Notice in the modded bios I didn't change the clocks! this is because once the power limit was increased both cards automatically boost to 1493mhz WITHOUT SOFTWARE OC (highest boost state in bios)

Any Ideas? my thinking at the minute is that the 2 6-pin power connectors to each card cannot supply the Watts necessary to go beyond 128%

If anyone would like to check out my bios I have included a link to my google drive where you can download it, I know there are some very serious overclockers on this forum so hopefully I have just set something wrong.

1.3v is the bios I am currently using

https://drive.google.com/file/d/0B-Nz1L7y2ABOLW9uTTVtYkhUVlk/view?usp=sharing

Short your shunt resistors and you won't need to change power limit at all http://overclocking.guide/increase-the-nvidia-power-limit-all-cards/ .

[Zayzo]

Not true about 1.3v, not every GPU overclokcks that good and 1.3v gives more OC on some GPU.

Voltage doesn't do much for Maxwell. Sometimes, regardless of temps/volts it just will not clock higher. On water i get 1610 stable @1.26v BUT it also doesn't get hotter than 45c.

 

Short your shunt resistors and you won't need to change power limit at all http://overclocking.guide/increase-the-nvidia-power-limit-all-cards/ .

Not many are comfortable doing so even when it is so easy but really its for cards that are being capped by the LEDs or the fans taking up the power(Not a problem if its on water). The card doesn't draw much power anyways, especially if you're on water.

[Jaqen]

when not in SLI one of my cards overclocks to over 1600mhz stable, the other one doesn't want to go over 1573mhz, however I cannot use these clocks in all games because after 20 mins or so the power usage climbs to 130%-140% followed by loss of signal to monitor and a loud buzzing sound.

 

Why does the power usage continuously climb?

[Jaqen]

Shouldn't need over 130%. I get over 1600+ on the core while using 105-109% power(on water).

 

Edit: Also, 1.3v is way more than you'd actually need for 1500+

I cannot get the clocks at a stable boost frequency without pushing 100watts through each 6-pin power connector and even at that it still doesn't stay at the stock boost of 1304mhz!

 

Strangely my cards would boost to 1354mhz constant before I messed with the BIOS so I would really appreciate it if someone experienced with the 970 could look at my bios and the stock bios for my card to see what I am doing wrong because I am really struggling now!

[Zayzo]

I cannot get the clocks at a stable boost frequency without pushing 100watts through each 6-pin power connector and even at that it still doesn't stay at the stock boost of 1304mhz!

 

Strangely my cards would boost to 1354mhz constant before I messed with the BIOS so I would really appreciate it if someone experienced with the 970 could look at my bios and the stock bios for my card to see what I am doing wrong because I am really struggling now!

I'll check out your bios in a little bit. Occupied by CS:GO atm.

[Jaqen]

I'll check out your bios in a little bit. Occupied by CS:GO atm.

thanks mate I appreciate it

[Zayzo]

It looked pretty similar to mine. Nothing that would make it use that much more power.

[Jaqen]

It looked pretty similar to mine. Nothing that would make it use that much more power.

 

 

thanks for having a look, its not making sense to me, can I see your complete power table? maybe there is an issue with the total TDP values I have

[Zayzo]

Yeah, sure.

This is the other half of the table.

I ran a loop of valley so you could see how much power my card pulls @1.26 and 1600.

[Jaqen]

Yeah, sure.

This is the other half of the table.

I ran a loop of valley so you could see how much power my card pulls @1.26 and 1600.

does voltage affect power consumption? that may be a stupid question but I thought of them as two separate things- voltage= stability power=higher potential clocks

 

So for example if you ran the same bios as you are now but with 1.3v would you consume more power with the same clocks?

[Zayzo]

does voltage affect power consumption? that may be a stupid question but I thought of them as two separate things- voltage= stability power=higher potential clocks

 

So for example if you ran the same bios as you are now but with 1.3v would you consume more power with the same clocks?

More voltage more power consumption

Yes, i would consume more power but because the difference is so small compared to my voltage now it would barely be noticeable.

[Jaqen]

More voltage more power consumption

Yes, i would consume more power but because the difference is so small compared to my voltage now it would barely be noticeable.

 

in other words its not the voltage that is keeping my cards back.

 

Right now after 30 mins of gaming the clocks on both cards drop back to 1245mhz! GPU-Z says the only limitation is SLI for both cards, which is confusing to say the least, if the power limit is not reached on either card why would they throttle?

[Zayzo]

in other words its not the voltage that is keeping my cards back.

 

Right now after 30 mins of gaming the clocks on both cards drop back to 1245mhz! GPU-Z says the only limitation is SLI for both cards, which is confusing to say the least, if the power limit is not reached on either card why would they throttle?

How are the temps? Could be a PSU problem. So gpu-z is saying the limitation is SLI?

[Jaqen]

How are the temps? Could be a PSU problem. So gpu-z is saying the limitation is SLI?

as they are water cooled temps max at 48C

 

I have an 850W PSU, the max power in the table is 234W per card but as I mentioned they don't even reach that before GPU-z reports SLI limited on both cards.

 

I am used to seeing SLI on one card while the other would be at full power but not both at the same time, that doesn't make any sense to me