I had a REF version and the ASIC score was 78.8

I just received a SC edition and the score is 66.6

EVGA_JacobF
ASIC quality does not really indicate the performance

 
higher ASIC = higher stock boost and lower stock voltage.
so basically higher ASIC = more performance

ManiXyZ

EVGA_JacobF
ASIC quality does not really indicate the performance

 
higher ASIC = higher stock boost and lower stock voltage.
so basically higher ASIC = more performance

I know this is the assumption, but has this been proven?

I have a Titan X SC with 81.1% ASIC, so it has a higher potential OC?

Well this SC version (66.6% ASIC) overclocks pretty good.  
 
I added +100 MHZ to Core and +50 MHZ memory (this is all I tried). This was with no voltage increase.  However, I did move the power scale to 110% (increasing the max GPU temp) linked together (priority on Power).

Now it runs constantly with Boost at 1365.  Sometimes it jumps up to 1385, but stays pretty consistently at 1365

VegetaCreeper
The Stock Titan X I have runs at 1205 mhz (boost) without overclocking
The Titan X SC runs 1253 (boost) without overclocking (stock OC)

The ASIC on the Titan-X (evga sc'ed) i just opened is 79, however it's boosting up to 1342MHz just with the stock oc(raising the Power Target to 110%)
 
So i'd say it still depends on the chip itself.
 
Is 1342 MHZ good for just using the stock oc(power target at 110%)?
 
TIA

LOL..
 
I needed a good laugh. 

mako88
72.9% ref, and when set to +200MHz it tends to sit between 1406-1380MHz in-game at 70-72 Celsius.
 
EVGA, where is restock on the 980 AIO cooling kits!!  FFS! 

 
No way you are running with temps that low with that OC.  Unless you set your fans to 100%

ASIC 75.8% BOOST 1354mhz

This ASIC quality subject is a bit controversial, but I tell you what. I have 4 Titan Blacks, ASIC quality is in the 60-70 range on 3 of them, and the 4th one is 80+. That last one consistently runs at higher clock rate and lower voltage.
 
I use them for GPGPU, and so can run identical tasks on each card - the one with higher ASIC always finishes quicker.

VegetaCreeper
Does having a lower ASIC score mean that the GPU is made with less quality? 

I do think that a lower ASIC does give better chance of the chip being a bit slower on air, but
it's still so much the luck of the draw, as some have had low/mid 70's ratings and got
high OOTB boost numbers. 
 
 
 
=======================
Alienware R4 
i7 3820 @ 4.2GHz
EVGA SC  Titan X (boost 1342 MHz normal, 1419 MHz with manual oc'ing)
16GB (4*4GB) 1600 DDR3 Ram
512GB Samsung SSD
1TB and 4TB HDD's
875W (pos) Dell OEM P.S. 
=======================

I will try to explain it as far as i understand the matter technically.
 
ASIC is about current leakage, it means there is always current leakage in every chip structure and the lower the ASIC the higher the leakage.
The effect of this leakage is the voltage in the chip is going down a little bit.
 
An example to understand this, is an power amplifier for hifi.
If you increase the bias, this means the current through the power transistors, you will always see the voltage at the transformer is going down a little bit.
This is technically not avoidable.
What you do at a GPU for compensation, is you increase the voltage at the supply for the chip.
This is the reason that a lower asic gpu always has a higher votage at the same clock speed, than a gpu with a higher asic, it's a compensation for the voltage drop from current leakage.
 
The problem now is easy, higher current and higher voltage means more energy through the chip and again higher temperatures.
The current leakage is increasing with the temperature in the circuit, so you have to increase the voltage again.
 
So you see that you arrive at the power target of the gpu earlier, if you have a lower asic.
 
Since technically all circuit have the same behavior, you see why there is always a limit for overclocking, it's simply the increasing current leakages and temperatures of the circuits, while rising voltages.
That's also why professionell overclockers need very high voltages and extreme cooling, both to keep the current loss down as much as possible.
 
To make it more complicated the asic is of cause, not the only thing limiting the overclocking, but it's the only thing you can describe with a number like asic.
 
The rest is simpy luck of the draw and it means that low asics can possibly still have better performance, because of other factors than asic could describe.
 
And sorry for my language, since this is not my native language, i have a low language asic in my brain circuit

card number one is 75.2%
card number two is 64.4%
card number three is  71.1%
but yet I have not seen any difference in performance for tri sli or dual sli all clock the same even on boost
im happy with the added hybrid coolers they all cool the same

I like more GTX980Ti Matrix than 980Ti Lightening.
But both are good.