290 Max Safe Voltage on Air?

[DLD]

Hello, what would be considered the max safe voltage on air for the 290 Vapor X?

Or is it really only the temp that matters? Highest I took it was +225mV offset which had it around 1.320 - 1.350v in Unigine Heaven.
Temps hit a max of 74c on the core and like around 69c for the vrm1.
So how high could I take the volts to if remaining under 80c?

Most of the info I can find is always about the reference cards than ran ridiculously hot. Any info would be greatly appreciated!

 

[Silent_Scone]

on the Vapor I'd 1.4 to 1.45v if you're feeling brave.

I had the Lightning at 1.5v

 

[DLD]

on the Vapor I'd 1.4 to 1.45v if you're feeling brave.

I had the Lightning at 1.5v

Am I correct though that I can increase it to say 1.4 or 1.45 as long as my temps stay under 80c?

Or can to much volts damage the card even if it staying well in the safe zone on temps?

 

[Silent_Scone]

Keep an eye on VRM temps. Shouldn't be a problem if you're only doing short runs. Fans at 100%


On air you'll see negative impact on performance once the VRMS exceed 90c anyway but they're safe for that and a bit more. Try to keep core below 95c

 

[DLD]

Keep an eye on VRM temps. Shouldn't be a problem if you're only doing short runs. Fans at 100%


On air you'll see negative impact on performance once the VRMS exceed 90c anyway but they're safe for that and a bit more. Try to keep core below 95c

Oh yeah I'm way below that at 1.35v. Running loops of Unigine Heaven had me peak at about 74c core and 69c vrm1.

That was with a custom fan profile and fans still were not at 100%

 

[Silent_Scone]

Oh yeah I'm way below that at 1.35v. Running loops of Unigine Heaven had me peak at about 74c core and 69c vrm1.

That was with a custom fan profile and fans still were not at 100%

Yeh the Vapor X coolers are pretty awesome. Just a shame the back plates get silly hot on them.

 

[DLD]

What about the Aux voltage? Seems nobody talks about that with the 290s.

Does it not have any positive effect increasing it?

 

[Silent_Scone]

It's PLL voltage (Phase Lock Loop). It probably won't help you on air but you can up the offset when you hit a wall, might help stabilise your max clocks

 

[Marine-RX179]

Remember to be extra careful with the vrm1 temp if you were using SuperSampling or higher than 1920 res. Running Sleeping Dogs with Extreme AA (which uses SuperSampling) the vrm1 can hit like 20-30C higher than MSAA running Heaven loop.

 

[DLD]

Remember to be exact careful with the vrm1 temp if you were using SuperSampling or higher than 1920 res. Running Sleeping Dogs with Extreme AA (which uses SuperSampling) the vrm1 can hit like 20-30C higher than MSAA running Heaven loop.

Ah thanks for the info on that!

Also thank you MjFrosty for taking the time to help a noob.

 

[gareth170]

i really wouldn't put 1.4v though these cards. remember they are 28nm

even 1.3 - 1.35v is a lot...

for 24/7 gaming i would say 1.3v max

 

[Silent_Scone]

i really wouldn't put 1.4v though these cards. remember they are 28nm

even 1.3 - 1.35v is a lot

Nonsense. What's that got to do with it? Even AMDs reference PCB which is arguably the better out of the Vapor X and possibly the Lightning. 1.4v is available on select partners out of the box.

 

[gareth170]

Nonsense. What's that got to do with it?

u wouldn't put 1.4v+ though a 28nm cpu (or 22nm cpu). has it'll kill it over a short time.

usually the smaller the nm the less voltage u should put though it.

 

[DLD]

I'm not wanting to put 1.4 - 1.5v into it for 24/7 use. This is simply to run a benchmark.

Though I don't think I would have any issues running 1.3 - 1.35v for 24/7 use given my temps peak out under 75c.

 

[Silent_Scone]

i really wouldn't put 1.4v though these cards. remember they are 28nm

even 1.3 - 1.35v is a lot...

for 24/7 gaming i would say 1.3v max

u wouldn't put 1.4v+ though a 28nm cpu. has it'll kill it over a short time.

usually the smaller the nm the less voltage u should put though it.

Yes but you're taking that to the extreme. Heat is the killer and trust me people put more than 1.4v through 28nm CPUs. In a lot of cases 24/7, no idea how you would think that .

GPUS are a lot more complex than CPUs and get to much higher extremes but there are tolerances in place and Hawaii is capable of running at 95c out of the box. If you wanted to pick hairs, there is your engineering feet. Almost 100 degrees through your 28nm

 

[humbug]

I run mine at 1.27v 24/7, 'Powercolor PCS+' i have no qualms running 24/7 at upto 1.3v, 1.35v for 1225Mhz Benching with no artefacts, i have benched it at 1.4v and it seems fine.

 

[DLD]

I seem to not be able to get my voltage to stay past 1.3v. Any ideas?

Even with +300mV offset I get up to around 1.32 - 1.35 but stays at around 1.297 most of the time running unigine.

What do I need to do to make it stay at around 1.35v?

 

[Silent_Scone]

I seem to not be able to get my voltage to stay past 1.3v. Any ideas?

Even with +300mV offset I get up to around 1.32 - 1.35 but stays at around 1.297 most of the time running unigine.

What do I need to do to make it stay at around 1.35v?

I never really pushed my Vapor-X cards when they were in past 200mv but you might find if they're anything like the Tahiti cards they're volt locked. Can't seem to find any evidence to suggest either way though.

 

[humbug]

I seem to not be able to get my voltage to stay past 1.3v. Any ideas?

Even with +300mV offset I get up to around 1.32 - 1.35 but stays at around 1.297 most of the time running unigine.

What do I need to do to make it stay at around 1.35v?

That might be vDroop, its normal. does the voltage reading change at all if you turn it up?

 

[Silent_Scone]

I've just emailed Adrian Thompson at Sapphire regarding voltage on the Vapor card, as was dealing with him via AMD not too long ago. Will let you know what he says