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7970 Lightning, worth the premium?

pgi947 said:
VRM was usually 2-5c higher then core, memory usually 2-5c lower then core.

So if Core was 40c, at best/worst VRM would be 45c, memory 35c, but more often then not the fluctuation was only 2-3c either side.
Click to expand...

Ummmm, mines running a good 12c higher
Core 41c, mem 38 and vrm 53c, water is coming straight from a hot chip though, will knock cpu down to 4.6 which in turn knocks a lot of vcore off and far lower temps, if my vrms under air hit 60c it would crash with bf3.
 
Try 3dmark with your 2nd monitor disconnected

Yer it's a shame my card won't go above 1280 like it could on previous drivers alongside the 1404 bios
 
Yeah, will try using just the one monitor. Maybe using both DVIs on the Matrix Platinum (given the fact it's got a completely different connection setup) is throwing it out of whack? I'll try that next (at the weekend).

gregster said:
You could be just unlucky in the chip lottery bud. I have seen 680 LTGs with lower clocks than mine (and volts) score higher in the gfx scores than me and vice versa.
Click to expand...

Strange, I've never (ever) heard of this before. Why and how would that occur?
 
Rossi~ said:
Strange, I've never (ever) heard of this before. Why and how would that occur?
Click to expand...

I have no idea but can say with my 2 LTGs at the same clocks (exactly) the bottom one scores around 300 points more on the Graphics score of 3Dmark11.

Somebody will know why and I had the same kind of thing on my I5 2500K. It was stable at 4.8 but scored less in 3Dmark11 than at 4.6...I guess it wasn't as stable as first thought but it never BSOD or froze.
 
Nickolp1974 said:
Ummmm, mines running a good 12c higher
Core 41c, mem 38 and vrm 53c, water is coming straight from a hot chip though, will knock cpu down to 4.6 which in turn knocks a lot of vcore off and far lower temps, if my vrms under air hit 60c it would crash with bf3.
Click to expand...

Did you make sure to use the correct thickness pads on the vrms? .iirc one pad is .5mm thicker then the other.
 
Yeah i did, but, when i put the block on i forgot to plug the aux power in so whipped it off again to plug in, maybe it had shifted, should have checked.
 
might try another 1/4 turn on screws see if that helps, only just nipped them did not want to over tighten

dont want to strip it just yet

oh and managed to nudge it to 1255 on core using ln2 so slight increase over normal bios.
 
Nickolp1974 said:
Ummmm, mines running a good 12c higher
Core 41c, mem 38 and vrm 53c, water is coming straight from a hot chip though, will knock cpu down to 4.6 which in turn knocks a lot of vcore off and far lower temps, if my vrms under air hit 60c it would crash with bf3.
Click to expand...

Is this under load or idle? It could be a simple case of air in the waterblock. I noticed a few days after that my CPU had gone 5C hotter. I shook the case and turned it upside down and after a couple of mins, my temps were all back to good.

Before taking it all apart Nick, make sure you have no trapped air. Your VRMs temp is too high. Underload, none of my temps go over 45C

Nickolp1974 said:
might try another 1/4 turn on screws see if that helps, only just nipped them did not want to over tighten

dont want to strip it just yet

oh and managed to nudge it to 1255 on core using ln2 so slight increase over normal bios.
Click to expand...

Another point is, AMD do run a little hotter than Nvidia, so be carefull before stripping it down (maybe wasting your own time)
 
Has anybody tried this card in a case with vertically orientated cards? I can remember seeing someone with GTX 680 Lightnings in SLI in vertical orientation, but how do they perform?
 
What overclocks are people getting without increasing the voltage and what are you getting when increasing the voltage?

Mine doesn't seem to want to go much further on stock voltage.
 
I struggled past 1100mhz on stock voltage, 1340mhz with max volts. Probably safe on air up to around 1.275v, the cooler is excellent :)
 
Thanks, just trying to see what I can get to now. Struggling to get past 1210mhz @ 1.27v on air. The cooler is fantastic, much better than my TF3 on my 6950

What memory clock/volts did you get?
 
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