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[Official] NVIDIA GTX 780 Ti Owner's Club - Page 727

post #7261 of 16504
Quote:
Originally Posted by OccamRazorย View Post

1.What is the maximum TDP limit ? 106 % ?

Stock bios 106%, modded bios 200/300% Afterburner or Precision will get you 600W max TDP
Read my article about TDP below:
Warning: Spoiler! (Click to show)
"The PT is the increase of TDP (thermal design power) which is determined by the chips maker (GK110 =250W) but this is not a fixed value, refers to the maximum amount of power the cooling system, in this case a chip, is required to dissipate. The TDP is typically not the most power the chip could ever draw, but the maximum power that it would draw when running "real applications". This ensures the chip will be able to handle essentially all applications without exceeding its thermal envelope, or requiring a cooling system for the maximum theoretical power.
"TDP is meant to be the wattage of the processor at load. I say "wattage" because it is unclear if this is meant to correspond most immediately to how much power is consumed in watts, or how much heat is produced in watts, but as near as I can tell the TDP is pretty much meant to indicate both" GL



(where C is capacitance, f is frequency and V is voltage)

Now, you dont have to make complicated calculus or anything like that because you have this chip here:



It monitors real-time voltage and power draw and its where AB gets its reading from the VRMยดs! wink.gif

Stock bios come with 250W TDP (AKA PT) so when its at 100% you will have 250W of power draw, if you increase it to the max stock 106% youll get: 250x106%=265W
The same is with modded 300/400/500W bios what you see in AB or precisionX is the percentage above what you set!
Ex: with a 500W bios (Slider set to maximum of course) you see 60% usage, this equals to: 500x60%=300W
YOU CAN DIRECTLY CONTROL TDP WITH THE SLIDER! thumb.gif

Now, why has AB a 300% slider while PrecisionX uses 200% for the same bios with the same PT?
Well, AB and precision have different interfaces so the readings are different for the same thing, just keep in mind the base TDP value and make your calculations from there
It doesnt matter what the % slider is in any program, just increase it if you having stutters or frame drops and when making calculations always make them from the base TDP:

aW x b% = cW (a= bios base TDP, b= OSD TDP, c= aproximate power draw)"

2. What is the maximum GPU voltage ? 1.212 V ?

Yes, stock will get you a max 1,200V or even lower depending on the PMW and leakage of your card.

3. Can the VRM temperature be monitored ?

Reference cards, no! All non-reference cards have VRM temperature monitoring!

4. Can the memory voltage increased ?

No, again only non-reference premium cards have memory and voltage adjustments: Classifieds and lightnings! Almost all other non reference standard cards have both voltage and memory adjustments but lack the user control management as the premium cards have, non reference has no way of controlling memory voltage increase as the memory voltage controller has no I2C interface!

5. What is the memory brand ?

Samsung (Very good on air/water, Excellent under LN2), hynix (Excelent on air/water, Very good under LN2) and Elpida (meh), pray you wont get Elpida! tongue.gif


Cheers

Ed

(Team skyn3t)

DCU2 is never a reference PCB. It depends on how much effort Asus wants to put into their design as to whether VRM monitoring will be possible.

As if elpida is any worse than hynix... The staff at OCUK have previously tested the new batches of Hynix and Elpida used on 290/x's and Ti's and found 0 difference between their OC headroom
post #7262 of 16504
Quote:
Originally Posted by overclockFranceย View Post

Thank you for this detailed answer. But if I want to go beyond the 106 % TDP limit, I would need a custom bios for the ASUS GTX 780TI DC2 OC because it is not a reference card ?

Yes, DC2 is not a reference card, you will need a modded bios!

EDIT: Apparently the DCU does not have temperature monitoring although it has support through the DIGI+ ASP1212 voltage controller, ASUS stepped on the ball on this one,
Memory is SK Hynix and carry the model number H5GQ2H24AFR-R2C!
Quote:
Originally Posted by fleetfeatherย View Post

DCU2 is never a reference PCB. It depends on how much effort Asus wants to put into their design as to whether VRM monitoring will be possible.

As if elpida is any worse than hynix... The staff at OCUK have previously tested the new batches of Hynix and Elpida used on 290/x's and Ti's and found 0 difference between their OC headroom

The problem with any online "staff" reviews is that most if not all are biased towards some "sponsors" (and lets not talk about some "privileged" sites that get golden samples from those "sponsors" far from the retail product and "review" something that we will never get) so i always read them with a bucket of salt! tongue.gif
All the feedback i know and get is Elpida is a very bad Oc'er but there is also bad Samsung and bad Hynix: but Elpida seems to get much more low OC percentage than Samsung and Hynix!


Cheers

Ed

(Team skyn3t)
Edited by OccamRazor - 2/9/14 at 4:26am
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post #7263 of 16504
Not sure how there can be any bias when they claim that memory chips from two manufacturers which are randomly used on all reference cards for both AMD and NV overclock the same within a margin of error.

That's pretty much as wide of a scope as you can get, with the least possible sampling error and opportunity for deliberate bias.

Everyone is entitled to their opinions of course.
post #7264 of 16504
Quote:
Originally Posted by OccamRazorย View Post

Yes, DC2 is not a reference card, you will need a modded bios!
The problem with any online "staff" reviews is that most if not all are biased towards some "sponsors" (and lets not talk about some "privileged" sites that get golden samples from those "sponsors" far from the retail product and "review" something that we will never get) so i always read them with a bucket of salt! tongue.gif
All the feedback i know and get is Elpida is a very bad Oc'er but there is also bad Samsung and bad Hynix: but Elpida seems to get much more low OC percentage than Samsung and Hynix!


Cheers

Ed

(Team skyn3t)

And if I buy the ASUS GTX 780 TI DC2 card, do you think that skyn3t will have enough time to modify its bios to increase the TDP limit ?
post #7265 of 16504
Quote:
Originally Posted by fleetfeatherย View Post

Not sure how there can be any bias when they claim that memory chips from two manufacturers which are randomly used on all reference cards for both AMD and NV overclock the same within a margin of error.

That's pretty much as wide of a scope as you can get, with the least possible sampling error and opportunity for deliberate bias.

Everyone is entitled to their opinions of course.

Exactly! that's why i don't trust any "site" reviews even when they dont seem biased, i rather trust your reviews instead anytime! thumb.gif

Quote:
Originally Posted by overclockFranceย View Post

And if I buy the ASUS GTX 780 TI DC2 card, do you think that skyn3t will have enough time to modify its bios to increase the TDP limit ?

We have little time now, i cant promise any deadlines but PM me with your bios when you have the card! thumb.gif


Cheers

Ed

(Team skyn3t)
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post #7266 of 16504
Quote:
Originally Posted by OccamRazorย View Post

Exactly! that's why i don't trust any "site" reviews even when they dont seem biased, i rather trust your reviews instead anytime! thumb.gif
We have little time now, i cant promise any deadlines but PM me with your bios when you have the card! thumb.gif


Cheers

Ed

(Team skyn3t)

OK, thanks.
post #7267 of 16504
Guys, Which clocks do you think are the max. recommended(regarding temps) for a reference stock cooled 780Ti? I got a MSI ref. one with 74.6% ASIC quality and hynix mem, and it won't let me go higher than +200 core +90/100 mem(artifacts) either because it may not be a good clocker or perhaps due to stock cooling not being able to cope with the heat?
Edited by xGTx - 2/9/14 at 8:43am
post #7268 of 16504
Quote:
Originally Posted by OccamRazorย View Post

Exactly! that's why i don't trust any "site" reviews even when they dont seem biased, i rather trust your reviews instead anytime! thumb.gif
We have little time now, i cant promise any deadlines but PM me with your bios when you have the card! thumb.gif


Cheers

Ed

(Team skyn3t)


That sounds good. I would also like a Bios for my DCU II OC? So the original bios I can upload tomorrow.
post #7269 of 16504
Installed a WB on my 780Ti yesterday. Fired it up and temps look very, 44C at load. But I then realized I missed a couple of thermal pads, wasn't there on the ref cooler but looked at the instructions today and found that I should have put some here too:




How bad is it not to have pads there? I guess they get a little air flow from the ref but now pretty much nothing. Do I need to tear my loop down?
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post #7270 of 16504
Quote:
Originally Posted by arvidabย View Post

Installed a WB on my 780Ti yesterday. Fired it up and temps look very, 44C at load. But I then realized I missed a couple of thermal pads, wasn't there on the ref cooler but looked at the instructions today and found that I should have put some here too:




How bad is it not to have pads there? I guess they get a little air flow from the ref but now pretty much nothing. Do I need to tear my loop down?

They are in the instructions for a reason. I'd not take the risk and just replace it, without tearing your whole loop apart, try to remove just the waterblock. ( I have no idea if this is possible, new to watercooling )
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