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[TPU] GIGABYTE GTX 680 SuperOverclock WindForce 5X Pictured Some More - Page 7  

post #61 of 80
Quote:
Originally Posted by windfire View Post

Those fans are 40x20mm with typical static pressure of 4.5mmAg at around 6000rpm producing about 28dbA for 9CFM. So, five will produce a combined total of roughly 45CFM.

Reference design with centrifugal blower fan typically produces around 15CFM (eg GTX570 at around 85% max speed).

A Gigabyte Windforce 3x design has three 80x15 (or 10?)mm fans with typical static pressure of 2.7mm Ag at around 3000rpm producing about 30dbA for 35CFM per fan.

Judging from that king size vapour chamber and the number of heatpipes + fins, I would expect those 5 fans will spin at 4500rpm to produce enough cooling under load.

A 40mm fan at 4500 RPM isn't terrible, but it does make a somewhat annoying high-pitched whine. 5 of them certainly won't be quiet.
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post #62 of 80
Quote:
Originally Posted by jrbroad77 View Post

Who's to say that will cool better than an MSi Lightning GTX 680 heatsink? Anyways, the goal of cooling isn't to make as big a heatsink as possible, then add fans. Not to be snide but is being better than GB's engineers a compliment? Last I checked they can't make a decent BIOS (to be fair, they're only 1 year late). As for performance, 10 phase VRM seems decent but I'd put money on MSi Lightning GTX 680 taking the world record on LN2; and I can't really see the Windforce being much faster than an MSi Lightning on air. You're going to max out the voltage before you hit 95C on either card. Consider the 7970 uses more power than the 680, and I don't see much purpose for massive triple slot heatsink and silly 40mm fans, but maybe I'm wrong.

Bolded the important parts of the rant. We don't know. But I'd have to put my money on it working rather than being a massive, hulking card thats absolutely crap at cooling. There should be a reason, and hopefully the engineers are smart enough to figure it out.

How about we wait and see, b4 calling it a fail, or did you have a crystal ball I was unaware of? rolleyes.gif
Quote:
Originally Posted by kyle7412 View Post

....unless it was $10

k... You could take the cooler off you know, still worth far more than $10. But I get what your saying, its not for you.
Quote:
Originally Posted by prava View Post

Spot on thumb.gif For instance, 680 don't require tons of power at default config, which means they don't nned an incredibly good heatsink to be cool and silent. Now, pairing any heatsink with 40mm is a huge mistake, specially for a product that is very well engineered (default) on its own.
but oh well, people who believe any design with 40mm fans is good...they can keep dreaming, as its NOT (unless you can't fit any bigger fan in there, of course). I'm sure they use those same 40mm fans in their rigs (/sarcasm).

Did you borrow the other guys crystal ball? Since you have it, tell me how Piledriver will do as well, or Haswell please. We all want to know.

As I'll tell everyone who can't be reasonable and keep their opinions as just that, opinions rather than barking at us all telling us how fail it is, lets wait and see.
Quote:
Originally Posted by windfire View Post

Those fans are 40x20mm with typical static pressure of 4.5mmAg at around 6000rpm producing about 28dbA for 9CFM. So, five will produce a combined total of roughly 45CFM.
Reference design with centrifugal blower fan typically produces around 15CFM (eg GTX570 at around 85% max speed).
A Gigabyte Windforce 3x design has three 80x15 (or 10?)mm fans with typical static pressure of 2.7mm Ag at around 3000rpm producing about 30dbA for 35CFM per fan.
Judging from that king size vapour chamber and the number of heatpipes + fins, I would expect those 5 fans will spin at 4500rpm to produce enough cooling under load.

You seem to know a lot more about fans than me, thats for sure. So... looking good? heh

----

I'm not really interested in the card, but I'm hoping it smokes all other 680's while being quiet enough to buy just to ram the reviews down some peoples stupid little necks.

Got a little worked up there, gotta go smoke smile.gif
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post #63 of 80
Quote:
Originally Posted by Fuell View Post

Quote:
Originally Posted by windfire View Post

Those fans are 40x20mm with typical static pressure of 4.5mmAg at around 6000rpm producing about 28dbA for 9CFM. So, five will produce a combined total of roughly 45CFM.
Reference design with centrifugal blower fan typically produces around 15CFM (eg GTX570 at around 85% max speed).
A Gigabyte Windforce 3x design has three 80x15 (or 10?)mm fans with typical static pressure of 2.7mm Ag at around 3000rpm producing about 30dbA for 35CFM per fan.
Judging from that king size vapour chamber and the number of heatpipes + fins, I would expect those 5 fans will spin at 4500rpm to produce enough cooling under load.

You seem to know a lot more about fans than me, thats for sure. So... looking good? heh

----

I'm not really interested in the card, but I'm hoping it smokes all other 680's while being quiet enough to buy just to ram the reviews down some peoples stupid little necks.

Got a little worked up there, gotta go smoke smile.gif

With 5x40mm fans, it would be very hard for this cooler to be quieter than a standard 2x92mm cooler such as the MSI Twin Frozr III or Asus DirectCU II. We don't know how it performs, so it could possibly outperform the non-ref coolers currently on the market. However, in terms of noise, I highly doubt it will be quieter.

A single 40mm fan must spin at at least 4000 RPM to produce even a half-decent amount of airflow, and that works out to around 30 dBA. That in itself is not so bad, but this cooler has five of those 40mm fans, each spinning at around that speed. If you were around during the Athlon 64 days, many NForce4 motherboards had a 40mm fan to cool the chipset, and that usually spun at around 5000 RPM. If you remember how loud one of those fans was, just imagine 4 more, and you'll have an idea of how loud this cooler must be.

Here's a video of a 1U server with 4x 40mm San Ace fans to give you an idea of the noise levels:

And here's a video of a single 40mm, 10,000 RPM fan in action. While the fans on that Windforce 5X probably won't be 10,000 RPM, there are 5 of them:

Edited by 996gt2 - 4/30/12 at 8:40pm
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post #64 of 80
Quote:
Originally Posted by Fuell View Post

Did you borrow the other guys crystal ball? Since you have it, tell me how Piledriver will do as well, or Haswell please. We all want to know.

You clearly have no idea how cooling works, huh? This is not a chip, nor anything related to it, and thus there are no "crystal balls" involved. You see, heatpipes, heatsinks and vapor chambers have been with us for a long of time...and fans too, you know? There is no guessing involved in the fact that when you move a certain amount of air around, a big fan is better than any number of small fans that will take the same physical space. Why? A fan makes noise based on the rpm it is spinning (most of it, at least). Also, If you go look at 40mm fans vs, for instance, 120mm. you will see that the % of area covered by the motor is HUGE in the small fans vs the bigger ones. Altogether, you just need to see a few of fan specs to realise that we use 1 x 120mm instead of 9 x 40mm fan (they both use the same space) because the first one is the most efficient...and, recently, computer cases try to use the biggest fans available because the bigger, the more efficient.

So, who uses such 40mm fans? Like I said a hundred times, you only use small fans when you have no other option. For instance, 40mm fans are used in workstations because of stacked racks...not because of anything else...specially if you realise that in the last years computer cases are carrying even 200mm fans...do you really think they would be using such huge fans instead of a plethora of 40mm fans if there was no practical reason?

So, like I said, there is no magic involved. Such small fans being used in such big card (thus why I'm mentioning its size every time) make absolutely no sense, and nobody needs to be an engineer to understand this fact, as long as you understand the basic principles of cooling. You see, I never said the card won't be able to be cooled properly...I said the card will be a flop, because a good heat sink requires certain balance that 40mm fans, whatever you like to dream of them, can never give you.

Its that simple, seriously, and don't tell me about pressures when you can adjust how dense those fins in the heat sink are (although the quantity of air such small fans move would make little to no difference when compared to bigger fans) and, least of all, don't tell me about "the GB engineers know....", when they are told what to do. Small fans aren't good for efficient heatsinks, enf of story. (efficient meaning good cooling with the least amount of noise).
Edited by prava - 4/30/12 at 8:46pm
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post #65 of 80
The upper limit for noise and temperature is obviously the reference 680 design (otherwise they wouldn't release this), so unless that's unreasonable (it's not), there's a lot of needless speculation about how this thing will be too loud.

Quote:
Originally Posted by prava View Post

So, like I said, there is no magic involved. Such small fans being used in such big card (thus why I'm mentioning its size every time) make absolutely no sense, and nobody needs to be an engineer to understand this fact, as long as you understand the basic principles of cooling.

You didn't touch on one of the more unique aspects of the Gigabyte design: airflow is entirely parallel to the axis of the fan. Normal axial fans on a graphics card pushes air off the bottom of the heatsink before the air travels radially through the fins, wasting energy and causing turbulence. Here, that inefficiency is negated by lining the fans with the fins.

Considering how even something as trivial as a fan grill can dramatically affect noise and performance, it's neither absurd nor difficult to realize that there may be more going on than a simple fan-size analysis would suggest.
post #66 of 80
I don't know why some are so upset with it having five 40mm fans. Granted, a smaller fan at higher RPM is louder, it's not that much louder. I think the way those fans are oriented with the fins on the heatsink could make it incredibly effective.

I really don't think the engineers at gigabyte are dumb enough to orient the fans to blow hot air at the motherboard. In fact, I think the gigabyte engineers might have found the most efficient way of clearing the heat from between the heatsinks with fans. Efficient meaning every scrap of air-turbulence is being used to clear out every fin on the heatsink directly. I'm looking forward to seeing the overclock temps.


Edit: Forgot to mention the possibility to have a 40mm to [insert larger fan size here] adapter. Like how there are 80mm to 120mm fan adapters, except that gigabyte would have to make a custom adapter or just redesign the thing to use larger fans with an adapter funneled down to the exact width and height of the heatsink. bulb.gif (gigabyte should just hire me now) biggrin.gif
Edited by Kappy03 - 4/30/12 at 10:28pm
post #67 of 80

Looks ugly and loud.

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post #68 of 80
i lol'd when i saw the card. Crazy.
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post #69 of 80
Quote:
Originally Posted by 996gt2 View Post

Here's a video of a 1U server with 4x 40mm San Ace fans to give you an idea of the noise levels:
And here's a video of a single 40mm, 10,000 RPM fan in action. While the fans on that Windforce 5X probably won't be 10,000 RPM, there are 5 of them:

That's terrifying.
post #70 of 80
Quote:
Originally Posted by Fuell View Post

Bolded the important parts of the rant. We don't know. But I'd have to put my money on it working rather than being a massive, hulking card thats absolutely crap at cooling. There should be a reason, and hopefully the engineers are smart enough to figure it out.
How about we wait and see, b4 calling it a fail, or did you have a crystal ball I was unaware of? rolleyes.gif
k... You could take the cooler off you know, still worth far more than $10. But I get what your saying, its not for you.
Did you borrow the other guys crystal ball? Since you have it, tell me how Piledriver will do as well, or Haswell please. We all want to know.
As I'll tell everyone who can't be reasonable and keep their opinions as just that, opinions rather than barking at us all telling us how fail it is, lets wait and see.
You seem to know a lot more about fans than me, thats for sure. So... looking good? heh
----
I'm not really interested in the card, but I'm hoping it smokes all other 680's while being quiet enough to buy just to ram the reviews down some peoples stupid little necks.
Got a little worked up there, gotta go smoke smile.gif

Agree with you fully, but my gigabyte 7970 windforce's fans can go up to 4500rpm (yes all three of them). This becomes louder than my 500w subwoofer...yes it does.

Either way they wont last long, doing "the mod" on them.

Also guys, why would gigabyte unveil something COMPLETELY NEW if it didn't work? There must be SOME advantage of this. Also 40mm fans aren't loud until they pass 3000rpm for me.

All my 120/200/230mm fans are rated at under 21db (coolermaster/scythe/bitfenix) and the 40x20mm fan on my motherboard (sabertooth x79) typically spins between 3000-3800rpm at which I cannot hear it. Around 4000rpm I can hear a MILD whine, similar to the sound of electricity in wires at night if you live in a quiet place (ie far from a city). They are noticeable around 4000rpm+ and get ANNOYING at 4500rpm. Keep in mind this is a SINGLE fan in a quiet room/case. The loudest thing in my case is a h100 pump so eehhh. With five of these fans I'd scale the noise down ~500rpm so they will be silent @ idle 2000rpm, be VERY quiet up to 3000rpm, be noticeable at 3500rpm and be IRRITATING anything after that.

The gigabyte fans, on 100% load are probably capable to getting up to 4000-5000rpm but that's 100%. You will typically see them at 40-60% at stock loads, 30% at idle and 80% on an overclock. It will be noticible but nowhere near a referance version, yet cooler than a referance version. My only gripe is that they didn't use 36mm wide fans (which would have kept it at dual slot biggrin.gif)
Edited by JassimH - 5/1/12 at 8:41am
    
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