 Now I promised to do some videos on overclocking acoustics temperature especially comparing the cyclone g-force gts 450 from MSI against the PNY reference g-force gts 250 now as I mentioned in the respecting unbox Respecting respective unboxings for both of these cards. They do take a slightly different approach So you can see here the cyclone does not really exhaust much air outside of the case So it's going to be at a bit of an advantage today because we are testing on an open test platform here Whereas the PNY card does exhaust Probably a good 30 to 40 percent of the air outside of the case with this shrouded cooler Maybe even more maybe more like 40 to 50 percent But it does have the disadvantage of not having this a wide open spread out design to just dissipate the heat quite as well So first of all, let's have a look We're running combustor with four times anti-aliasing to really just beat the heck out of these cards They are running at stock speed right now But you can see that the cyclone cooler keeps that gts 450 at a cool 48 degrees Even under 100% GPU usage the fan speed is up around 53% So if we wanted to we could really crank it up and we could probably squeeze better cooling out of this unit So here why don't we just do that for a minute? See what happens? Oh Oh, it's not even gonna let me yeah, there it goes Actually, I guess that's not really the point of what I'm doing today, so let's put it back to auto Where it will ramp itself down ever so slowly And I want you to have a listen at sort of how loud that fan is You hear it ramping down still Ramping down some more. We're not quite all the way to where it will finally settle We're still up around 67% So it's quite quiet down below anywhere below about 60% And it makes its way all the way down to 51% So that's the noise under load For the cyclone cooler All right, well here's our idle noise testing And you can probably hear what you think is the cyclone fan quite clearly right now But if I go ahead and stop this Corsair fan behind it Hopefully you'll be able to hear that it actually gets quite a bit quieter the cyclone fan is nearly silent at idle And you can see it runs at about 40% at about 31 degrees And that's kind of useless unless I give you some context for the temperature of the room So it's about 26.5 degrees Celsius at the intake for the fan now Let's switch over to the PNY reference card with combustor running you can see we've got the GPU temperatures are quite a bit higher But there's a very good reason for that. It doesn't all come down to cooler design So it is running at 64 to 65 degrees on the GPU, but check this out the fan Our PMS stay down around 30% so what that means is this card is exactly as quiet under load Which is basically completely inaudible over the noise of my desktop PC behind me back there And really that's not even a loud desktop either So that's kind of an interesting way they've that PNY has tweaked the fan profiles because you can see even under 100% load which you'll never encounter in a game It doesn't get up into any kind of a danger zone in terms of GPU temperatures, so it's um Yeah, it's not an apples to apples comparison that we were able to do today, but here Maybe this will help why don't we take the fan speed and throw it up around 50% There we go so fans beat us up around 51% So let's say you wanted to keep the GPU a little bit cooler Let me give that some time to stabilize the temperatures, and then I'll go ahead and Do a quick noise test on that one too, and we can compare those temperatures Oh Yeah room temps Okay, so if you wanted to take manual control over your fan Here's more of an apples to apples comparison We've got 52 degrees on the GPU. We're running it at 51% now. I'd say at 51% This fan sounds a little bit louder than the cyclone fan But remember too that as soon as you go and put the cyclone in a case you're going to be exhausting heat into your case Which is going to be recycled into the fan and this one's gonna blow a little bit more Out the back of the case via these vents than the cyclone will so that couple of degrees might be a little bit more than the cyclone will so that couple of degrees might be made up for it is like I said a touch louder, but that's Neither here nor there at this point I think we want to do some overclocking results on both of these cards over the next little bit So continue to stay tuned don't forget to subscribe to Linus Tech Tips Actually one more short clip just wanted to show you what this fan sounds like at full speed it only lets me go up to 70 for whatever reason I'm not quite sure why 70% but That's what this one sounds like at full speed compared to the cycle