G80 De-Mystified; GeForce 8800GTX/GT

[Vertigo0176]

How big would the heatsink have to be to cool a hypothetical 300w GPU on air?

 

[josh6079]

The heatsink itself wouldn't have to be as big as you would think with the aid of heatpipes. So to answer your question, the heatsink without heatpipes would have to be fairly thick and big in surface area. With heatpipes it's surface area can decrease as well as it's thickness, but the way the fins and the heatpipe correlate would be the most important thing.

 

[Smartazz]

Originally posted by: josh6079
The heatsink itself wouldn't have to be as big as you would think with the aid of heatpipes. So to answer your question, the heatsink without heatpipes would have to be fairly thick and big in surface area. With heatpipes it's surface area can decrease as well as it's thickness, but the way the fins and the heatpipe correlate would be the most important thing.

Would they use the cooling they've used on the 7900GTX you think?

 

[josh6079]

Would they use the cooling they've used on the 7900GTX you think?

For what, G80? I doubt it. If they did they would probably have to use copper instead od Alum. The G80 (and R600) are going to be big, hot, and power hungry at first. The 7900GTX cooler is the best stock cooler next to ATI's recent X1950's, but if they used it on a G80 card I'd imagine it wouldn't be the top model one. Perhaps the GT, but even that is highly doubtful.

 

[otispunkmeyer]

Originally posted by: Elfear

Originally posted by: otispunkmeyer

water cooling is the wimps way out

good air cooling is a fine art.... engineering art. making it fanless air cooling is even more awesome

Ah, comeon otis. I usually agree with your posts but "the wimps way out"? I would dare say that it takes just as much engineering art to make an effective watercooling setup as it does an effective aircooling solution, plus you get better temps which means higher overclocking and/or more silence.


Back on topic- Anyone know how soon ATI and Nvidia are switching to a 65nm process?

meh

its like the car engine argument. some liek 4 pots with turbos, others like to simply have more cylinders/displacement.

though im an advocate of both when it comes to engines... V8 + supercharger will do nicely.

i like air cooling, theres just something brilliant about its simple-ness and some of the best designs are often the best looking. a 30 quid Heat sink like the CNPS 9500 will happily keep up with cheap water coolers that are nearly 3x as much in price.... i like that.

others like water cooling. each to his own

 

[Acanthus]

Originally posted by: Creig

Originally posted by: Acanthus
You can place all of that externally.

All that really has to be in the case is the block/s and the tubes that run to it/them.

And typically the pump/reservoir.

Zalman Resorator 2

 

[Smartazz]

Originally posted by: Acanthus

Originally posted by: Creig

Originally posted by: Acanthus
You can place all of that externally.

All that really has to be in the case is the block/s and the tubes that run to it/them.

And typically the pump/reservoir.

Zalman Resorator 2

Do you own one?

 

[Acanthus]

Originally posted by: Smartazz

Originally posted by: Acanthus

Originally posted by: Creig

Originally posted by: Acanthus
You can place all of that externally.

All that really has to be in the case is the block/s and the tubes that run to it/them.

And typically the pump/reservoir.

Zalman Resorator 2

Do you own one?

yup

 

[Vertigo0176]

Just for a point of reference, how many watts do current GPU's consume?

 

[josh6079]

Originally posted by: Vertigo0176
Just for a point of reference, how many watts do current GPU's consume?

Depends on which one.

 

[Smartazz]

Originally posted by: Vertigo0176
Just for a point of reference, how many watts do current GPU's consume?

The X1900XTX is almost 140watts I think.

 

[josh6079]

Actually, it's about 20 Watts less than that.

 

[Smartazz]

Originally posted by: josh6079
Actually, it's about 20 Watts less than that.

whoa, less than 140watts, but still pretty high. Those cards run hot, I can't imagine how hot these cards will get if they're really above 200watts.
edit: wow, the 7800GT is really efficient.

 

[Cookie Monster]

A 7900Gt consumes about 40W~. Funny how the next DX10 cards will consume up to ~250W all by it self. Thats like 6 7900GTs in one.

 

[Nightmare225]

Originally posted by: Cookie Monster
A 7900Gt consumes about 40W~. Funny how the next DX10 cards will consume up to ~250W all by it self. Thats like 6 7900GTs in one.

Ehh? Are these idle readings?

 

[TheLiberalTruth]

Originally posted by: Genx87

Originally posted by: TheLiberalTruth

I don't recall saying there was price fixing in this case, I said that it is one of many cases where supply and demand do not dictate price.
Oppressive taxation? Inefficiencies in their economies? When the govt gets involved? Must you conservatives always default to blaming the government when you don't know what you're talking about?
< sigh >
Also, when did it become convention to use an apostrophe to indicate plurality?

Oh I ASSumed since we were talking about the current situation with Nvidia cards your reply was on topic. Excuse me for ASSuming you could do such a thing.

As you will note, I said price fixing and collusion will make for higher prices bunkie. But I dont think that is going on in this situation.

Why do we default to blaming the govt? Well in case you havent noticed, when the govt gets overly involved in the market, the market and consumer suffers.

When will you socialists realize your system is flawed, has been tried, and has failed on numerous occasions? The govt is not an answer to everything.

Hahaha, you fool. So, the people suffer when the government breaks up a monopoly? The consumer suffers when the government steps in and requires safety features in cars, like seat belts? The people suffer when the government steps in during a depression and offers employment? Please tell me how the consumer has suffered from these things!
It's sad that you're too stupid to step outside of your 500 person town in the midwest and see how the world <i>really</i> works.
Funny how I'm a socialist because I see that corporations aren't the infallible, benevolent forces you mistakenly believe they are. Then again, there hasn't been a whole lot that you've said that has made any sense what-so-ever.
I suppose I'm wasting my breath with you, though. It's really like trying to teach a rock to speak.

 

[jiffylube1024]

Originally posted by: Cookie Monster
A 7900Gt consumes about 40W~. Funny how the next DX10 cards will consume up to ~250W all by it self. Thats like 6 7900GTs in one.

I think that's idle. Load is like 65W. 7800GTX is more like ~90 I think. X1900XT/XTX are in the 100's, as is the 7900GTX.

250W seems excessive but 200W+ sounds pretty plausible to me nonetheless, especially since by ATI and Nvidia's own admission, these things will be very power hungry (and may, for example, need an external power supply).

 

[nullpointerus]

Originally posted by: TheLiberalTruth

Originally posted by: Genx87

Originally posted by: TheLiberalTruth

I don't recall saying there was price fixing in this case, I said that it is one of many cases where supply and demand do not dictate price.
Oppressive taxation? Inefficiencies in their economies? When the govt gets involved? Must you conservatives always default to blaming the government when you don't know what you're talking about?
< sigh >
Also, when did it become convention to use an apostrophe to indicate plurality?

Oh I ASSumed since we were talking about the current situation with Nvidia cards your reply was on topic. Excuse me for ASSuming you could do such a thing.

As you will note, I said price fixing and collusion will make for higher prices bunkie. But I dont think that is going on in this situation.

Why do we default to blaming the govt? Well in case you havent noticed, when the govt gets overly involved in the market, the market and consumer suffers.

When will you socialists realize your system is flawed, has been tried, and has failed on numerous occasions? The govt is not an answer to everything.

Hahaha, you fool. So, the people suffer when the government breaks up a monopoly? The consumer suffers when the government steps in and requires safety features in cars, like seat belts? The people suffer when the government steps in during a depression and offers employment? Please tell me how the consumer has suffered from these things!
It's sad that you're too stupid to step outside of your 500 person town in the midwest and see how the world <i>really</i> works.
Funny how I'm a socialist because I see that corporations aren't the infallible, benevolent forces you mistakenly believe they are. Then again, there hasn't been a whole lot that you've said that has made any sense what-so-ever.
I suppose I'm wasting my breath with you, though. It's really like trying to teach a rock to speak.

http://forums.anandtech.com/categories.aspx?catid=52&flcache=1339747&entercat=y

 

[Cookie Monster]

Originally posted by: Nightmare225

Originally posted by: Cookie Monster
A 7900Gt consumes about 40W~. Funny how the next DX10 cards will consume up to ~250W all by it self. Thats like 6 7900GTs in one.

Ehh? Are these idle readings?

Thats load. From Xbitlabs, the 7900GT consumes 40~W.

 

[Hauk]

!!!! DIE THREAD DIE !!!!

 

[Elfear]

Originally posted by: otispunkmeyer

meh

its like the car engine argument. some liek 4 pots with turbos, others like to simply have more cylinders/displacement.

though im an advocate of both when it comes to engines... V8 + supercharger will do nicely.

i like air cooling, theres just something brilliant about its simple-ness and some of the best designs are often the best looking. a 30 quid Heat sink like the CNPS 9500 will happily keep up with cheap water coolers that are nearly 3x as much in price.... i like that.

others like water cooling. each to his own

I can see your point in that good air cooling is a much better deal than low-end watercooling. Watercooling isn't even worth it unless you'll see a noticable difference over air cooling.

I like your engine analogy too. Cubes + forced induction =

 

[Smartazz]

Originally posted by: josh6079
Actually, it's about 20 Watts less than that.

hmm, I read here that is was close to 140 watts. Text

 

[josh6079]

Originally posted by: Smartazz

Originally posted by: josh6079
Actually, it's about 20 Watts less than that.

hmm, I read here that is was close to 140 watts. Text

Wasn't that tested by Shamino, the same guy who showed the X1950XTX killing the GX2? I see your point though. I guess it depends on how the load pulls are achieved. Maybe they were using a more stressful program than Xbit to reach load watts.

 

[Smartazz]

Originally posted by: josh6079

Originally posted by: Smartazz

Originally posted by: josh6079
Actually, it's about 20 Watts less than that.

hmm, I read here that is was close to 140 watts. Text

Wasn't that tested by Shamino, the same guy who showed the X1950XTX killing the GX2? I see your point though. I guess it depends on how the load pulls are achieved. Maybe they were using a more stressful program than Xbit to reach load watts.

Is the X1950XTX better than the GX2 though?

 

[josh6079]

It depends, but I remember his benches showing drastic differences between the two. I'm not saying that one faulty bench makes the guy incompentent, I'm just saying to take them with a grain of salt.

The X1950XTX generally will be close the the performance of a GX2, but only surpasses it in a few titles IIRC. I'm not saying I trust Xbit whole-heartidly either, just saying that it seems like you and I were both correct--the X1900's can take as much as 120~140ish watts during load.

Still, from what I hear that is a candle compared to G80/R600.