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post #2901 of 10534
EVGA SC ACX 2.0 GTX980.

With +84mv and +124% power can only achieve +155 on core.

Anything over that I get blank screen and driver stopped responding message in Firestrike.

Not much of a card unfortunately. ASIC 67.1%

Max boost 1542MHz

Sigh.
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post #2902 of 10534
Quote:
Originally Posted by BelowAverageIQ View Post

EVGA SC ACX 2.0 GTX980.

With +84mv and +124% power can only achieve +155 on core.

Anything over that I get blank screen and driver stopped responding message in Firestrike.

Not much of a card unfortunately. ASIC 67.1%

Max boost 1542MHz

Sigh.

What are you sighing about lol. I cant seem to break 1530 boost without some instability after playing games for a while and I have 81%. Anything above 1500 is really good though.
post #2903 of 10534
Quote:
Originally Posted by BelowAverageIQ View Post

EVGA SC ACX 2.0 GTX980.

With +84mv and +124% power can only achieve +155 on core.

Anything over that I get blank screen and driver stopped responding message in Firestrike.

Not much of a card unfortunately. ASIC 67.1%

Max boost 1542MHz

Sigh.

Like MURDoctrine said, that's fantastic. I don't know why you're sighing.
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post #2904 of 10534
Quote:
Originally Posted by seithan View Post

Scroll two - three pages back and you will find my post.

Im using 1x6pin and 1x8pin. I asked the same question and ppl say im fine. The card seems to draw the maximum voltage but not sure about the amperage. Its true though that i should be limited by maximum power output, because 1x6pin+1x8pin deliver different wattage and surelly they dont have the same effeciency.

Im clocked to 1520/4001 on this setup. Sometime in the future ill get a decent new PSU. Hopefully ill be stable @ 1550 ><</div>

(using your quote but there are others asking the same)

there is NO difference in the power that can supplied between a 6 and 8 pin PCI-E connection. each have three 12v wires and @ 18awg (gauge) can supply up to 100 watts each for 300 watts max. what IS drawn from each connection is set in the card's BIOS:
http://www.overclock.net/t/1452223/kepler-bios-tweaker-v1-26-v1-27-added-tdp-unlock-gtx-780ti-780-titan-gtx770/0_50#post_21418844 Warning: Spoiler! (Click to show)
i have seen titans go over 500 watts @1.4 underwater - remove 75 watts pci-e slot and two 8 pins are suppling 425watts @ 212.5 each! some pci-slots can supply 100 watts so you're still talking running the cable connections ~34% out of spec!

there WAS a time when it was different. (cheaper) PSU manufacturers used two 12v wires to 6 pin and three to 8 pin but, that was a long long time ago - when the pci-e power specs first came out. that is the reason for the two sensor wires in an 8 pin connection, so the card "knows" there are three 12v wires in the connection.

there is no OCP on pci-e connections! just for the WHOLE rail in the PSU!* thumb.gif

*i am talking about a SINGLE RAIL PSUs! multi rail PSUs will trip!

edit:
i ought to run a disclaimer; that i am speaking of theoretical limits. variables such as length of cables, crimping of connections and overall quality of PSU plays the largest factor before things go BOOM or roasting of marshmallows.

Edited by looniam - 10/21/14 at 1:50am
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post #2905 of 10534
Quote:
Originally Posted by orifter View Post

Completely, would love if someone who knows this could chime in and tell us which numbers are real. Hopefully it's the true afterburner numbers displayed while running benchmarks.

The numbers measured by Afterburner's or Precision's graphs are correct. Your GPU-Z boost clock isn't the realized boost clock, that's just the boost clock reported by your GPU BIOS... in practice you get a little extra.
Quote:
Originally Posted by BelowAverageIQ View Post

EVGA SC ACX 2.0 GTX980.

With +84mv and +124% power can only achieve +155 on core.

Anything over that I get blank screen and driver stopped responding message in Firestrike.

Not much of a card unfortunately. ASIC 67.1%

Max boost 1542MHz

Sigh.

You're still beating the curve, average is more like 1500. I bought this card based on reviews claiming 1480 ish.
post #2906 of 10534
Idk, is there a reason to go beyond 1500/8000 ? like trying 1550 at all costs and so on ?
I thought that there is already diminishing returns
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post #2907 of 10534
Quote:
Originally Posted by H4wk View Post

Idk, is there a reason to go beyond 1500/8000 ? like trying 1550 at all costs and so on ?
I thought that there is already diminishing returns

Depends, some instances when bouncing off the power target it's pointless but not diminishing as such.
post #2908 of 10534
Quote:
Originally Posted by H4wk View Post

Idk, is there a reason to go beyond 1500/8000 ? like trying 1550 at all costs and so on ?
I thought that there is already diminishing returns

HAHA this is OCN. There is no such thing as needing a reason to go above and beyond tongue.gif . I would just say it's people wanting the most out of their card especially when you see a lot of people posting that they are getting mid 1500's. I'm sure most want to shoot for it even when 1480-1510 is probably the good average. Something I am finding odd is that memory hungry benchmarks like heaven and valley show no issues with my memory overclock but games like battlefield 4, guildwars 2, and borderlands 2 and presequel are causing issues for what I had set. At 4050 I was getting what I would describe as giant out of place pixels on anything graphically intensive such as the game and MSI Afterburner. So it seems my limit is 4037 unless I see something else after playing for a while.
Edited by MURDoctrine - 10/21/14 at 2:16am
post #2909 of 10534
I am grateful. I know I shouldnt sigh.

Get max boost and overclock at stock volts!! This is already known though and been reported online.

Firestrike = 14352

Core +160 = 1555 (max boost)

Mem +500 = 8000

Temp = 64 degrees (air)

Core Voltage +0

Power Limit +124%

If I increase core voltage, max boost and score lower, I assume as the card "throttles".

Interesting exercise. Waiting for modded bios. New water block and backplate waiting to be installed thumb.gif
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post #2910 of 10534
Yeah, I too get more out of this card with stock voltage.
Though I'd like to have more power limit, currently I am stuck with MSI's 122% biggrin.gif after testing with fire strike and shadow of mordor/alien/the evil within games I am currently completely stable @ 1510MHz core and 8000 memory

Though I am @ 72-75celsius on load mainly due to the fact I have haf-x but only single intake 230mm in front @ low rpm and exhausting is noctua 140mm @ low rpm and my h100i, my pc is completely quiet at idle and at load only my GPU can be heard smile.gif
Edited by H4wk - 10/21/14 at 2:50am
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