Originally Posted by iShox
New topic anyone? lol.
@Hokies83, I ordered a similar card to yours yesterday (KFA2 white PCB 680). Uses the same cooler and PCB as far as I know. Is 1300mhz the max OC you could get out of it?
Only 2 fans are working.. Ive had it to 1370mhz.. but it throttles due to heat.
Galaxys Rma Service is pretty slow. and have no phone number to contact.. There customer service does not handle anything rma...
And do not know anything about this card yet.
Originally Posted by samoth777
I see there is a heated debate on the 680 volting. I can see how people are being conservative about it and not going for the 1.21 volt. personally, i wouldn't think a tiny weeny voltage bump will do damage, but i could be wrong. if i had reference 680s (which im considering, if i dont get to find a block for my 680 DCII) i would definately bump up the volt then slap a waterblock on it. just me two cents.
a question to those that have watercooled their reference 680s: how much of an core increase did you guys get? i'm quite curious. I can't go through 400 pages of the thread sorry
I made this post over in the 670 thread
there are a lot of other power related parameters in the BIOS other than just voltage - ref boards have been tested to go up to 1.21V months ago. Of course, there are also vDroop settings, max Power %, overcurrent protection, the list goes on. The thing about voltage though, is that GPU-Z only reports what the BIOS lists as voltage offset max. Typically, most reference BIOS' report 1175 as that max even though they may go higher (and they have been tested to go higher with multimeters.The only way to see max voltage is with a digital multimeter. Software does not report proper max voltage on the GTX 600 kepler in all cases, especially with over voltage.
MSI lightning owners have software reporting 1.175 or 1.21V when they're running at 1.4V. Same with the EVGA classified. Reference boards can and do run 1.21V but software will report either 1.175V or 1.21V depending on which BIOS you're using, FYI. Like I said this has been tested a long time ago, reference boards reporting 1.175V when they're running 1.2
have a feeling the reason overclocks go up is because this new BIOS raises the core voltage and thus the effective GPU Boost voltage that Kepler adds dynamically in the background (that GPU-Z, MSI Afterburner and other software programs can't detect). Let's say the stock card goes from 1.175V to 1.20V with GPU Boost active in the game as blackened23 mentioned. The new BIOS puts the core at 1.21V and suddenly Kepler dynamic GPU voltage boost might be pushing the card to 1.23-1.24V in the real world
. The problem is without a multi-meter this is undetected and people think their card is only using 1.21V. This is why overvolting Kepler can be so dangerous on air. You might apply 1.23-1.24 and end up with 1.25-1.27V.
For example, HardOCP's MSI Lightning had a default voltage of 1206 mV and they applied a GPU voltage offset of +93mV. That means at most this card should be using up 1299mV, but in games with a volt-meter that went to 1318mV. It seems Kepler is adding a little bit of extra GPU voltage for GPU boost but it's just not showing up in software.
Stock these cards are doing 1.21 Software is just not showing it this has been confirmed with a volt meter..
I did not see the post but they said somebody reported the use with a volt meter and reported 1.23 volts.. I do not know if this was the volts with the max boost clock are not.
When it comes to overvolting a Gpu 00.1 to the core can kill them.. Volt modding a card that has it locked for a reason is very risky.. and from what the people are reporting 20mhz-50mhz at the max some are not getting anything at all. it is really not worth the risk imo.
Then Again it is your Gpu and your risk so if you feel the need for that 1% performance have at it.