7970 Lightning, worth the premium?

DK06CTR · 8 Nov 2012 at 12:56

So overclocked the lightning to 1150 core 1500 memory at just over the stock volts. Which is 1.175 on mine. Ran a run of heaven and at the end it started artifacting and they looked like cheqeured flags almost, whats this then do i need a bump in voltage on the core?

Or is it the memory, what does that kind of artifacting usually mean. Had to reboot aswell as was doing the same artifacting on the desktop after finishing heaven. All ok after reboot though.

psychodil · 8 Nov 2012 at 13:03

Yes give it a little more core voltage. I doubt your memory would start flaking out at 1500, most will do 1750+.

DK06CTR · 8 Nov 2012 at 13:10

Temps are good aswell only 55c tops on the core at that and the memory and vrms barely reach 50c. So more juice then.

Geeman1979 · 8 Nov 2012 at 13:12

DK06CTR said:
So overclocked the lightning to 1150 core 1500 memory at just over the stock volts. Which is 1.175 on mine. Ran a run of heaven and at the end it started artifacting and they looked like cheqeured flags almost, whats this then do i need a bump in voltage on the core?

Or is it the memory, what does that kind of artifacting usually mean. Had to reboot aswell as was doing the same artifacting on the desktop after finishing heaven. All ok after reboot though.

Sounds like your memory needs a little bump in volts to me.Try setting your Memory Voltage at 1625 (mV) and try again.

DK06CTR · 8 Nov 2012 at 13:20

So that artifacting is more a sign of the memory then.

Yaayuh! · 8 Nov 2012 at 13:22

DK06CTR said:
So that artifacting is more a sign of the memory then.

Not at all, could be the core or the memory.

Also, generally speaking, raising the memory voltage doesn't do much, if anything.

DK06CTR · 8 Nov 2012 at 13:24

Oh right ok will bump a little on both then

Geeman1979 · 8 Nov 2012 at 13:27

Could be either, allthough i've see that cheqeured effect as you described on mine and a bump in volts on the memory side cured it.

Geeman1979 · 8 Nov 2012 at 13:29

Rossi~ said:
Not at all, could be the core or the memory.

Also, generally speaking, raising the memory voltage doesn't do much, if anything.

Looking at your 3dmark score! Graphic score seems low for the clocks your running.

DK06CTR · 8 Nov 2012 at 13:34

Yeah the main thing was trying to pinpoint what that particular aftifact meant but it seems could be either and just wants a bump in volts.

Yaayuh! · 8 Nov 2012 at 13:41

geeman1979 said:
Looking at your 3dmark score! Graphic score seems low for the clocks your running.

I dunno, compares nicely with Why Scotty's taking into consideration the difference in clock speeds.

Geeman1979 · 8 Nov 2012 at 13:51

Rossi~ said:
I dunno, compares nicely with Why Scotty's taking into consideration the difference in clock speeds.

My run with a lower Core clock http://www.3dmark.com/3dm11/4729346

Allthough I think my memory clock is a little higher than yours without digging out your link. From what I found with both my Lightning and 690 upping the memory clock didnt improve the score much compared to a higher core clock.

Yaayuh! · 8 Nov 2012 at 14:11

geeman1979 said:
My run with a lower Core clock http://www.3dmark.com/3dm11/4729346

Allthough I think my memory clock is a little higher than yours without digging out your link. From what I found with both my Lightning and 690 upping the memory clock didnt improve the score much compared to a higher core clock.

I've found memory overclocking does make quite a big difference. Otherwise, there must be something wrong with my drivers.

Geeman1979 · 8 Nov 2012 at 14:12

What was your memory at?

Yaayuh! · 8 Nov 2012 at 14:13

geeman1979 said:
What was your memory at?

7250

Geeman1979 · 8 Nov 2012 at 14:17

Rossi~ said:
7250

In (MHz) Afterburner doesn't show me it in that format.

Yaayuh! · 8 Nov 2012 at 14:23

geeman1979 said:
In (MHz) Afterburner doesn't show me it in that format.

7250MHz/4 = 1812.5MHz

vs

1925MHz

I'm going to do a fresh driver install tonight/this weekend. See if that has any positive effects.

Geeman1979 · 8 Nov 2012 at 14:30

Rossi~ said:
7250MHz/4 = 1812.5MHz

vs

1925MHz

I'm going to do a fresh driver install tonight/this weekend. See if that has any positive effects.

Worth a try! Is that the highest you can get on the memory side?

Yaayuh! · 8 Nov 2012 at 14:36

geeman1979 said:
Worth a try! Is that the highest you can get on the memory side?

Only started to clock the memory recently. Concentrated on core first.

pgi947 · 8 Nov 2012 at 15:07

1800 on the memory is ample, you may experience correction above 1800mhz, my limit was around 1950, hope the new card fairs as well