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post #40121 of 43973
Quote:
Originally Posted by EpicOtis13 View Post

So the highest core OC that I can run where both cards are stable is only 1100mhz. Is this unreasonable? The highest 3dmark score that I have gotten so far is 23554 graphics score with two r9 290's at 1100/1350, any higher than this gives me some artifacting. I may just have expectations that are too high because my 7970's liked to do 1200/1700 at stock core volts and +10% power limit.

What are your other settings? Specifically VDDC and Power Limit. What app are you using to oc? What are your temps (CORE and VRMs) at load?

edit: if that is at stock volts, then that is actually pretty good and your 7970 - above average.

it's silicon. my first 290 can do 1170 in FS at stock volts while the other 1150. Power Limit maxed for both.
Edited by rdr09 - 11/3/15 at 12:25am
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post #40122 of 43973
Quote:
Originally Posted by Ironsight View Post

I'm running my 290x on a QNIX monitor. It will not go into 2D mode even at 60 hz.
Is there a way to fix this or is it not possible?

Are you running a second monitor?
   
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post #40123 of 43973
Quote:
Originally Posted by rdr09 View Post


edit: if that is at stock volts, then that is actually pretty good and your 7970 - above average.
what does it mean stock volts ?
higher the asic->lower the stock volts
higher the default clock->lower the stock volts

Higher asic doesn't have to mean higher "achievable" clocks

...thus......stock volts differ, from about 1.18 to about 1.25v.....and this affects OC.
That's why I said run EVV application to tell the stock volts so u know how much headroom u have.
Edited by fat4l - 11/3/15 at 8:17am
post #40124 of 43973
Quote:
Originally Posted by fat4l View Post

what does it mean stock volts ?
higher the asic->lower the stock volts
higher the default clock->lower the stock volts

Higher asic doesn't have to mean higher "achievable" clocks

...thus......stock volts differ, from about 1.18 to about 1.25v.....and this affects OC.
That's why I said run EVV application to tell the stock volts so u know how much headroom u have.

not too familiar with asic. iirc, as discussed in this thread two years ago . . . it has to do with leakage but does not really matter with hawaii.

my 290 with an asic of 79 can bench to 1320 - 1330. my higher asic 290 can only do 1290. could be their asic is too close to even affect how far they can bench.

what i meant by stock is oc'ing as high as you can without needing to add VDDC. both my 290s need about +50 to do 1200 core.
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post #40125 of 43973
From some results I've seen of DPM 7 VID gained from The Stilts app for Hawaii cards even a small difference in ASIC quality (aka Leakage ID) makes a difference.

Why all this is going on is so ROM doesn't need to be manually set for VID per GPU. Every stock rom uses EVV, Electronic Variable Voltage. ASIC profiling goes on to then determine VID, besides ROM the driver also plays a role in this.

Next what goes on is default GPU clock in ROM plays an element in set VID, when it rises in a ROM from AMD default value VID reduces and that's why these edition cards tend to have a GPU core voltage offset programmed from factory.

Link:- A post by The Stilt on ASIC Quality, etc
Quote:
Originally Posted by rdr09 View Post

my 290 with an asic of 79 can bench to 1320 - 1330. my higher asic 290 can only do 1290. could be their asic is too close to even affect how far they can bench.

Run the Stilt VID app see what DPM 7 voltage you get for both, do it at stock setting ie no OC app running , etc.

I do agree that besides ASIC quality there is just plain simple silicon lottery going on.

How I see it your lower ASIC card maybe clocking higher as a) has higher default vid b) less leaky than other card.

In this post by the stilt is some other info on what goes on with low/high asic parts.
Edited by gupsterg - 11/3/15 at 9:57am
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post #40126 of 43973
Quote:
Originally Posted by rdr09 View Post

What are your other settings? Specifically VDDC and Power Limit. What app are you using to oc? What are your temps (CORE and VRMs) at load?

edit: if that is at stock volts, then that is actually pretty good and your 7970 - above average.

it's silicon. my first 290 can do 1170 in FS at stock volts while the other 1150. Power Limit maxed for both.
The power limit is set to +15% and I am running them at 1.35 volts. Any higher than 1150 and I get artifacting. I miss my 7970s. At 1.35 volts they were both hitting 1350 fully stable in game. I use afterburner to OC
post #40127 of 43973
Quote:
Originally Posted by sinnedone View Post

Are you running a second monitor?

I have a.2nd monitor plugged in but it's not enabled.
post #40128 of 43973
Quote:
Originally Posted by EpicOtis13 View Post

Quote:
Originally Posted by rdr09 View Post

What are your other settings? Specifically VDDC and Power Limit. What app are you using to oc? What are your temps (CORE and VRMs) at load?

edit: if that is at stock volts, then that is actually pretty good and your 7970 - above average.

it's silicon. my first 290 can do 1170 in FS at stock volts while the other 1150. Power Limit maxed for both.
The power limit is set to +15% and I am running them at 1.35 volts. Any higher than 1150 and I get artifacting. I miss my 7970s. At 1.35 volts they were both hitting 1350 fully stable in game. I use afterburner to OC
You should max out power limit. There's no reason to set it lower. It can only masking the unstable overclock.
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post #40129 of 43973
Quote:
Originally Posted by gupsterg View Post

From some results I've seen of DPM 7 VID gained from The Stilts app for Hawaii cards even a small difference in ASIC quality (aka Leakage ID) makes a difference.

Why all this is going on is so ROM doesn't need to be manually set for VID per GPU. Every stock rom uses EVV, Electronic Variable Voltage. ASIC profiling goes on to then determine VID, besides ROM the driver also plays a role in this.

Next what goes on is default GPU clock in ROM plays an element in set VID, when it rises in a ROM from AMD default value VID reduces and that's why these edition cards tend to have a GPU core voltage offset programmed from factory.

Link:- A post by The Stilt on ASIC Quality, etc
Run the Stilt VID app see what DPM 7 voltage you get for both, do it at stock setting ie no OC app running , etc.

I do agree that besides ASIC quality there is just plain simple silicon lottery going on.

How I see it your lower ASIC card maybe clocking higher as a) has higher default vid b) less leaky than other card.

In this post by the stilt is some other info on what goes on with low/high asic parts.

will do as soon as i get my rig together. still in storage.redface.gif

Quote:
Originally Posted by EpicOtis13 View Post

The power limit is set to +15% and I am running them at 1.35 volts. Any higher than 1150 and I get artifacting. I miss my 7970s. At 1.35 volts they were both hitting 1350 fully stable in game. I use afterburner to OC

max the power limit at any oc. we are opposites. my tahitis (4) are all low clocking. highest was 1255.
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post #40130 of 43973
Quote:
Originally Posted by gatygun View Post

Just when i ditched amd for nvidia, if this is true i'm kinda bumped out that i did go this way. I really wanted that monitor but found the minimum to low, this would change everything.

Nice found.


It's a pain that there are two different standards. Right now I have the freedom to go AMD or Nvidia, but if I invest in adaptive sync, I'll be wedded to one brand for the life of the monitor -- and that's a component I don't upgrade often.

Right now it seems like G Sync is more mature than Freesync. Like I mentioned earlier, the Acer XR341 is 30-75Hz, while the G Sync version of the same display is 30-100Hz. I like adaptive sync more for the sub-60fps benefits and I think I'd be fine with 75Hz max, but at the same price and performance, why wouldn't I go 980 TI + X34 versus Fury X + XR341CK? Same investment, same game performance, but better refresh range. Hopefully Freesync will catch up, I don't know why but I always prefer AMD. But if this state of affairs persists well into next year I might have to go green.
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