Passive HD3850

[Breezy]

Hi all,

Got a Power colour HD3850 extreme (Zerotherm cooler) i couldnt stand using the Zerotherm cooler as it was so loud, so i bought a Zalman VNF100 now my Gpu runs at 84 MAX load thats with an hour of COD4 at max settings whats the max temp the card can go without frying it? There is a slow spinning 120mm fan infront of it as im using a Silverstone SG03 case.


Cheers

 

[Darg]

I wouldn't let it go over 85C tbh. I'm uncomfortable with it that high even. Technically they can go up higher but you're risking the life of your card.

80C is the max temp I'd let mine go up to under load.

 

[carrot1401]

You could try and up the speed on the fan while playing games, dout you'll notice the slight increase in noise....

 

[silversurfer]

Depends what games you play and if you use earphones. Ive had a gpu upto 100c and it was not artifacting, I'd say 84 is ok but not exactly great for the longterm. Test for artifacts in ati tool and watch temps in game for a while also

I have my fan kick upto 100% at 82c but then I notice some distortion over that temp apparently due to my overclocks not liking heat as well on this 2900xt

 

[MikeHunt79]

Why can GPU's go over 80 degrees get we try and run CPU's under 60?

 

[silversurfer]

I have my conroe upto 80 quite often, at 85 it really does start to go wrong though.

Not only does coretemp start saying things like -115 but also crash and instability occurs. Ive been running it high temps for 18 months now though, 12 quid hsf and its fine at a 60% oc. Right now its idling at 72c but the asus motherboard says its 57c

The reason why you have the figure of 60 is most likely because old cpu did not have a coretemp sensor so you were measuring the external heatsink or the lid temp.
Im not sure if the gpu temp is as accurate

 

[Lanz]

Why can GPU's go over 80 degrees get we try and run CPU's under 60?

A slight error on a GPU due to heat would probably just show a micro-glitch or tiny sparkle, and at worse crash to desktop. When a slight error on a CPU due to heat would bluescreen, hence the greater desire for decent cooling.

 

[Darg]

Right now its idling at 72c

I really wouldn't be happy with it idling that high. Are you sure it's fully Orthos DC stable?

Sounds like it'd be up around 85-90 under load which is bad news for any CPU.

My 6300 idles at 47C, up to around 55-60 under load at 3Ghz.

 

[Monkeynut]

A slight error on a GPU due to heat would probably just show a micro-glitch or tiny sparkle, and at worse crash to desktop. When a slight error on a CPU due to heat would bluescreen, hence the greater desire for decent cooling.

Plus the arch of GPUs is completely different so they can take more heat by design.

 

[rangor gubbins]

Hi all,

Got a Power colour HD3850 extreme (Zerotherm cooler) i couldnt stand using the Zerotherm cooler as it was so loud, so i bought a Zalman VNF100 now my Gpu runs at 84 MAX load thats with an hour of COD4 at max settings whats the max temp the card can go without frying it? There is a slow spinning 120mm fan infront of it as im using a Silverstone SG03 case.


Cheers

hmmm, a Zalman VNF100 you say. Would this also fit my 3650? The fan it came with is noisy running at amything over 25%. (its a sapphire).
I'm Folding with the GPU client so the GFX card is working at 100% 24/7.

 

[gurusan]

I would try to get some more airflow over the card......

 

[Minstadave]

I've got the exact same card, took the Zerotherm off and put a VF-900 on, running it silently it idles at 40 ish and my temps never go over 68ish with it clocked at 800/1025.

Are you definately sure your cooler is sat properly on the GPU?

Failing that just refit the original cooler but cut the plug off and replace it with a normal fan connector, then you can hook it up to a fan controller or 7V it.

 

[silversurfer]

I really wouldn't be happy with it idling that high. Are you sure it's fully Orthos DC stable?

Sounds like it'd be up around 85-90 under load which is bad news for any CPU.

My 6300 idles at 47C, up to around 55-60 under load at 3Ghz.

Sometimes it would be stable at 3.4ghz in orthos but most of the time no, and right now definitly not because I dont even care how hot the northbridge gets and so on.

It works and nothing breaks and its zero hassle. The only practical trouble I have with mine is one program doesnt like the overclock, dr.divx
In that case I turn down the multipler from 8x to 6x and then it works ok. Theres no practical damage, 18 months of 80c or so and its fine. The northbridge gets to 53c

vcore is 1.58/1.6v