38CFM vs 83CFM Cooling Performance Difference

[presentxy]

Hi i have Corsair 200R case. I'm gonna use that combination.

2 Top Exhaust
1 Rear Exhaust
2 Front Intake
1 Bottom Intake

Akasa Classic 12cm 38CFM or Akasa Viper 83CFM. I know CFM what is mean. Higher value great for air flow. But it is too vital(because of CFM) or just a little difference i have money problem. Should i have to save my money and buy Viper or just go with classic. By the way silence is too important.

Thanks Everyone sorry about my english.

 

[Valantar]

How much airflow you need is dependent on what you need to cool. What hardware do you have in your PC? Something massively hot like an FX-9000 series with tri- or quad crossfireX R9 290s, or something small and cool like an i5 or A10 and a ~100W GPU? And what are your ambient temperatures like?

Unless you have some very power hungry hardware and live in a very hot place, the lower end fans are probably fine when you have that many of them. Note that the Viper fans will be LOUD when run at full speed (especially six of them!), so even if you get those you would want to slow them down, lowering the airflow.

Then again, six fans is complete overkill for most systems. I'd argue for two front intakes and one rear exhaust, or possibly three intakes. That case has enough openings that you barely need exhaust fans (again, unless you pack it to the rafters with hot-running hardware). As such, I'd rather go for three better-quality fans than six cheapo ones. And with that many openings, aiming for positive pressure (i.e. more air being forced in than forced out by fans) is a necessity to keep the PC relatively dust-free.

 

[Paperdoc]

I tend to agree with Valantar. You can use not quite so many fans, and lower-speed ones with less airflow and less noise will probably be OK. What you cannot really know, though, is the balance between airflow and noise. If you install high-speed fans that can generate high airflow and high noise, but put them under mobo automatic control, the mobo system will slow them down to deliver only the airflow needed for cooling, and hence much less noise. Unfortunately the fan's web page does not provide enough information to tell you how much less noise.

There is another important factor you have ignored, and I think that is because you do not understand why it is important. I assume that you plan to have all of these fans plugged into SYS_FAN headers on your mobo so that it will control all their speeds automatically to keep the cooling just right as your workload changes. Doing that depends on several factors, including how many fans and how many mobo headers you have. BUT it is especially important to match the type of fan (3-pin or 4-pin) to the method the headers use to control them. A true 4-pin fan header that actually uses PWM Mode (some do, some don't) cannot control a 3-pin fan. What caught my attention is that one of the fans you listed is 3-pin, and the other is 4-pin.

Post back here how many fans you plan to use for case cooling. Maybe that is exactly what you posted above, maybe you are changing your mind. (CPU cooling fans are controlled separately, and I assume you are talking here only about your case ventilation fans.) Post back here also exactly what mobo you have - maker and exact model number. With that we can look up its manual and advise what fans you need and how to connect them.

 

[presentxy]

AMD Phenom II X6 1100T @3.8GHZ
MSI GAMING 970 MOBO
and extra fan Multiplexer

POWERCOLOR HD7870 PCS+
8GB DDR3 1600MHZ
Corsair VS650W


Akasa Classic is enough for good cooling or not enough this is my question with 6 fan?

Thanks you guys.

 

[Valantar]

If you plan on using a connector like that, your fans will run constantly at full speed. As such, I would avoid the Vipers just to avoid noise. A fan with a rated noise level of ~30dBA is a very noisy fan (well, it's not a Delta server fan, but it's certainly not quiet). Combine that with the other noise sources in your PC, and it will be loud. As such, I'd go for four of the cheaper fans, three as intakes (2xfront+ side or bottom) and one (rear) as an exhaust.

Btw, doesn't the Carbide 200R come with two Corsair fans? Have you looked up their specs to see how they compare to the ones you plan to add?

 

[BonzaiDuck]

What is the CPU cooling strategy? That is, do you use water cooling or air cooling?

If air cooling, I would pressurize the case with more intake CFM (if only for adding fan specs), and higher-velocity exhaust fan behind the air-cooler. If possible, a restricted second exhaust might be useful for a ducted motherboard strategy. You don't want warming air adding to interior temperatures. YOu want to get intake air flowing across hot components and exhausted immediately thereafter.

If I could find Akasa Vipers (140mm) with green LEDs, all the intake fans in my case might be Vipers. As it stands, I use three -- one as pusher-fan on my CPU cooler. Two bottom-side-panel fans are Bitfenix Spectre-PRo LED 140's. The two fan brands seem to perform the same, and there is no noise. They are thermally controlled from either the CPU temperature or other sensors on the motherboard.

If you have vents that don't add much to the equation ( Sum(exhaust-CFM) <= Sum(intake-CFM) ) -- then block off those vents. I use black foam art-board -- good especially for a black or gray case.

Motherboard thermal control of fans like the Akasa Viper or the Bitfenix Spectre Pro's assures noiselessness. Even at near full-bore, those fans are not going to make a lot of noise running at maybe ~1,700 RPM. The 140mm Vipers are rated between 100 and 110 CFM.

 

[presentxy]

If you plan on using a connector like that, your fans will run constantly at full speed. As such, I would avoid the Vipers just to avoid noise. A fan with a rated noise level of ~30dBA is a very noisy fan (well, it's not a Delta server fan, but it's certainly not quiet). Combine that with the other noise sources in your PC, and it will be loud. As such, I'd go for four of the cheaper fans, three as intakes (2xfront+ side or bottom) and one (rear) as an exhaust.

Btw, doesn't the Carbide 200R come with two Corsair fans? Have you looked up their specs to see how they compare to the ones you plan to add?

yes i have 2 corsair fan and 1 akasa viper 14cm and xigmatek aegir's cpu fan and another xigmatek fan but my case right now noise i have to change all fans. I just wonder classic silent akasa fan is it enough or not ?

 

[BonzaiDuck]

I really don't understand any complaints about noise with the Akasa Vipers. Like the 3-pin Bitfenix Spectre- Pros, they probably top-end at maybe 1,700RPM. I haven't been able to detect even the air-turbulence white-noise that is much more tolerable than motor-noise. But my noise-isolation of these fans . . . . just . . . leaves them . . . .noiseless.

RUBBER! Between rubber automotive hose-bandage @ $4/roll, a box of Spire acoustic foam-rubber pads @ $9/box, those little silicon-rubber black donuts you can buy at the electronics store to avoid wire-chaffing for wires inserted through a metal panel, there are a lot of noise-isolation strategies besides the use of rubber fan-mounts.

So maybe that's where you folks get this noise idea about the Vipers -- can't say. But anything that vibrates in contact with the metal case chassis will amplify noise, when you'd rather attenuate it.