Overclock.net › Forums › Case Mods & Cases › Computer Cases › Can anybody explain the reasoning between 90/180 degree motherboard rotations in chassis?
New Posts  All Forums:Forum Nav:

Can anybody explain the reasoning between 90/180 degree motherboard rotations in chassis?

post #1 of 9
9/3/12 at 2:03pm
Thread Starter 
Hey OCN!

Im still a newb at things like these, so can anyone explain to my the case manufacturers such as Silverstone rotate the motherboard 90 degrees as seen with the RV03 or 180 degrees with the RV04/FT04?
Reply
Reply
post #2 of 9
9/3/12 at 2:06pm
I believe it's primarily because they're using the "warm air rises" frame of mind with those cases.
The intakes are at the bottom, so traditionally your vid cards, heatsinks etc would be drawing air from them and sending it upward toward the exhausts.
Stugots Jr.
(16 items)
  		  
CPUMotherboardGraphicsRAM
i5-750 @ 4.0GHz ASUS Maximus III Gene PCS+ 7950 @ 1100/1425 2x4GB G.Skill 1600MHz 
Hard DriveOptical DriveCoolingOS
128GB M4 | 500GB RE4 | 2TB F4 It BURNS! Noctua NH-U9B Windows 7 Premium x64 
MonitorKeyboardPowerCase
Dell S2409W [1920x1080] Filco Majestouch I (104) Seasonic X-560w Fractal Arc Mini 
MouseMouse PadAudioAudio
Logitech G500 Vengeance MM200 HT Omega eClaro SHURE SRH-840 | Audioengine A2+S8 
View all
  hide details  
Reply
Stugots Jr.
(16 items)
  		  
CPUMotherboardGraphicsRAM
i5-750 @ 4.0GHz ASUS Maximus III Gene PCS+ 7950 @ 1100/1425 2x4GB G.Skill 1600MHz 
Hard DriveOptical DriveCoolingOS
128GB M4 | 500GB RE4 | 2TB F4 It BURNS! Noctua NH-U9B Windows 7 Premium x64 
MonitorKeyboardPowerCase
Dell S2409W [1920x1080] Filco Majestouch I (104) Seasonic X-560w Fractal Arc Mini 
MouseMouse PadAudioAudio
Logitech G500 Vengeance MM200 HT Omega eClaro SHURE SRH-840 | Audioengine A2+S8 
View all
  hide details  
Reply
post #3 of 9
9/3/12 at 2:19pm
Quote:
Originally Posted by candy_van View Post

I believe it's primarily because they're using the "warm air rises" frame of mind with those cases.
The intakes are at the bottom, so traditionally your vid cards, heatsinks etc would be drawing air from them and sending it upward toward the exhausts.

If this is the reason... Well it doesn't work that way. The force of air rising and falling is not strong enough to effect the air in your case. Case fans are just too powerful.

If you want to change airflow directions around that is fine, as well as how you want to mount your hardware. I just find this idea of hot air rising effecting your temps nonsense.
Lantastic
(16 items)
  		  
CPUMotherboardGraphicsRAM
Intel Ivy Bridge 3570K ASUS P8Z77-I Deluxe Sapphire 5830 Extreme 2x8 G.Skill Ripjawz 
Hard DriveHard DriveCoolingOS
Samsung 830 1.3 TB External Drives Corsair H80 Win 7 Pro 
MonitorKeyboardPowerCase
Asus 1680x1050 2ms Logitech K350 Raidmax 730W BitFenix Prodigy 
MouseMouse PadAudio
Logitech M510 Old Cloth from the 90s Altec Lansing 2.1 
View all
  hide details  
Reply
Lantastic
(16 items)
  		  
CPUMotherboardGraphicsRAM
Intel Ivy Bridge 3570K ASUS P8Z77-I Deluxe Sapphire 5830 Extreme 2x8 G.Skill Ripjawz 
Hard DriveHard DriveCoolingOS
Samsung 830 1.3 TB External Drives Corsair H80 Win 7 Pro 
MonitorKeyboardPowerCase
Asus 1680x1050 2ms Logitech K350 Raidmax 730W BitFenix Prodigy 
MouseMouse PadAudio
Logitech M510 Old Cloth from the 90s Altec Lansing 2.1 
View all
  hide details  
Reply
post #4 of 9
9/3/12 at 2:32pm
Well I'm sure they've drummed up some snazzy marketing for it, at the very least the differentiation in the design itself makes their product standout.
Stugots Jr.
(16 items)
  		  
CPUMotherboardGraphicsRAM
i5-750 @ 4.0GHz ASUS Maximus III Gene PCS+ 7950 @ 1100/1425 2x4GB G.Skill 1600MHz 
Hard DriveOptical DriveCoolingOS
128GB M4 | 500GB RE4 | 2TB F4 It BURNS! Noctua NH-U9B Windows 7 Premium x64 
MonitorKeyboardPowerCase
Dell S2409W [1920x1080] Filco Majestouch I (104) Seasonic X-560w Fractal Arc Mini 
MouseMouse PadAudioAudio
Logitech G500 Vengeance MM200 HT Omega eClaro SHURE SRH-840 | Audioengine A2+S8 
View all
  hide details  
Reply
Stugots Jr.
(16 items)
  		  
CPUMotherboardGraphicsRAM
i5-750 @ 4.0GHz ASUS Maximus III Gene PCS+ 7950 @ 1100/1425 2x4GB G.Skill 1600MHz 
Hard DriveOptical DriveCoolingOS
128GB M4 | 500GB RE4 | 2TB F4 It BURNS! Noctua NH-U9B Windows 7 Premium x64 
MonitorKeyboardPowerCase
Dell S2409W [1920x1080] Filco Majestouch I (104) Seasonic X-560w Fractal Arc Mini 
MouseMouse PadAudioAudio
Logitech G500 Vengeance MM200 HT Omega eClaro SHURE SRH-840 | Audioengine A2+S8 
View all
  hide details  
Reply
post #5 of 9
9/3/12 at 2:41pm
Thread Starter 
Thanks for the explanations guys biggrin.gif. Anymore is welcome.
Reply
Reply
post #6 of 9
9/3/12 at 2:52pm
heat rises, i mean you can say what you want about it the lower air in my case is alot cooler than the air getting jetted out the top. I use it with watercooler and i have gotten a pretty good result using a single 120 pulling though the radiator out and up. It is partially also ascetics, it looks pretty BA if you have a nice watercooling setup in there. And one more final reason its actually really easy to access cables, i think, and i love this feature the most the fact that all i have to do is pull off the top part and i have complete access to the back of my mobo, gpu, psu, and the even put the fan switches up there; make it really easy to pop in and out perpherials instead of reaching behind the computer all the time.


i will tell you one pretty big drawl back (literary) is the fact that the case is HUGE its at least 180 mm's wide for the 180 mm fans in the bottom and its 2ft long, and i think that most vertical cases are going to have this issue because the mobo is going length wise and there needs to be room for the drives so most are going to be massive.
shababy
(19 items)
  		  
CPUMotherboardGraphicsGraphics
amd 965 c2 @ 3.875 asus m5a99x evo gigabyte 7950 gigabyte 7950  
RAMHard DriveHard DriveHard Drive
16 gb corsair vengeance  ocz vertex 4 ocz vertex 3 ocz agility 2 
Hard DriveCoolingOSMonitor
1 tb western digital water cooled win7 64bit samsung P2770HD 
KeyboardPowerCaseMouse
razer black widow  corsair ax650 silverstone raven rv-02 logitech g500 
Mouse PadAudioAudio
razer goliathus sennheiser hd 558 xonar dx 
View all
  hide details  
Reply
shababy
(19 items)
  		  
CPUMotherboardGraphicsGraphics
amd 965 c2 @ 3.875 asus m5a99x evo gigabyte 7950 gigabyte 7950  
RAMHard DriveHard DriveHard Drive
16 gb corsair vengeance  ocz vertex 4 ocz vertex 3 ocz agility 2 
Hard DriveCoolingOSMonitor
1 tb western digital water cooled win7 64bit samsung P2770HD 
KeyboardPowerCaseMouse
razer black widow  corsair ax650 silverstone raven rv-02 logitech g500 
Mouse PadAudioAudio
razer goliathus sennheiser hd 558 xonar dx 
View all
  hide details  
Reply
post #7 of 9
9/3/12 at 4:49pm
honestly the "heat rises" reasoning for that case design is bogus, you need a massive temperature difference to have any real effect, think of this, you put one hot coal in a fire place, sure the heat will rise, but the room will still smell smoky, why, because there isn't enough heat to start a convection cycle (to start an updraft current) so the actual gains from this kind of design would be less than .1 cfm gained. . .

now with how silverstone did with the raven cases, they used the bottom fans to just push air across the motherboard, not past the hard drives and how the actual fans are designed to be directional, so basically why these cases are good is not because of the heat rises principle, but because the intake fans have very low restriction once the air is in the case and how the air is directed at the exhaust fans

i'm sure you could get similar results if you used case in a different orientation. . .
Main Rig
(14 items)
  		  
CPUMotherboardGraphicsCooling
Phenom II X4 955 C2 GA-MA790GPT-UD3H HD4850 Hyper 212+ 
OSCaseMouse
W7 32 bit Lian Li PC-9F MX518 
View all
  hide details  
Reply
Main Rig
(14 items)
  		  
CPUMotherboardGraphicsCooling
Phenom II X4 955 C2 GA-MA790GPT-UD3H HD4850 Hyper 212+ 
OSCaseMouse
W7 32 bit Lian Li PC-9F MX518 
View all
  hide details  
Reply
post #8 of 9
9/3/12 at 4:53pm
  • Joined: Nov 2011
  • Location: asdf-land
  • Posts: 1,931
  • Rep: 94 (Unique: 82)
  • Reviews: 3
  • Folding Team Rank: 1,720
  •  
    Name Team Rank Points / May Work Units / May
    funfortehfun 1,720 666,671 / 25,221 354 / 9
       
  • Select All Posts By This User

Some applications of the 180* rotation are practical. In the TJ08-E/PS07, because of the upside-down orientation of the motherboard, the front AP181 180mm fan pulls air and blows it directly towards the CPU area as well as the GPU area. Because there is one big fan, this also creates positive air pressure, which is even better for an air cooling environment.

Solitude R2.0
(16 items)
 
Klein
(12 items)
 
Lappy
(6 items)
 
CPUMotherboardGraphicsRAM
AMD Phenom II X6 1100T @ 4.0 GHz ASUS M4A88TD-V EVO/USB3 Sapphire Radeon HD 6950 DiRT 3 Edition Corsair 8GB Vengeance Blue @ 1600MHz 
Hard DriveHard DriveOptical DriveCooling
Western Digital 1TB Caviar Blue Samsung 830 Series 128GB SSD LITE-ON iHAS 424-98 Corsair H80 + 2X Corsair 120MM Fans 
OSMonitorKeyboardPower
Windows 7 64-Bit Ultimate Samsung S27A350H 27" LED Backlit HDMI Monitor Lenovo SK-8815 Corsair 850W Professional Series Gold 
CaseMouseAudio
Cooler Master 690 II Advanced Microsoft Basic Optical Mouse Plantronics GameCom 367 
View all
CPUMotherboardGraphicsRAM
Intel i3-2125 Asus P8H77-I Intel HD 3000 Samsung Green 30nm 2x4GB MV-3V4G3D/US 
Hard DriveOptical DriveCoolingOS
Crucial M4 128GB  Asus DRW-24B1ST Intel Stock Cooler Windows 8 Pro 
KeyboardPowerCaseOther
Microsoft Wireless Keyboard 800 Corsair Builder Series CX500V2 Lian Li PC-Q11B TrendNet TEW-684UB 
View all
CPUMotherboardGraphicsRAM
Intel i5-3210M Dell 04G65K Intel HD4000 Dell 2x4GB 1600MHz 
Hard DriveOS
Seagate/WD 1TB 5400RPM Windows 7 Home Premium 
View all
  hide details  
Reply
Solitude R2.0
(16 items)
 
Klein
(12 items)
 
Lappy
(6 items)
 
CPUMotherboardGraphicsRAM
AMD Phenom II X6 1100T @ 4.0 GHz ASUS M4A88TD-V EVO/USB3 Sapphire Radeon HD 6950 DiRT 3 Edition Corsair 8GB Vengeance Blue @ 1600MHz 
Hard DriveHard DriveOptical DriveCooling
Western Digital 1TB Caviar Blue Samsung 830 Series 128GB SSD LITE-ON iHAS 424-98 Corsair H80 + 2X Corsair 120MM Fans 
OSMonitorKeyboardPower
Windows 7 64-Bit Ultimate Samsung S27A350H 27" LED Backlit HDMI Monitor Lenovo SK-8815 Corsair 850W Professional Series Gold 
CaseMouseAudio
Cooler Master 690 II Advanced Microsoft Basic Optical Mouse Plantronics GameCom 367 
View all
CPUMotherboardGraphicsRAM
Intel i3-2125 Asus P8H77-I Intel HD 3000 Samsung Green 30nm 2x4GB MV-3V4G3D/US 
Hard DriveOptical DriveCoolingOS
Crucial M4 128GB  Asus DRW-24B1ST Intel Stock Cooler Windows 8 Pro 
KeyboardPowerCaseOther
Microsoft Wireless Keyboard 800 Corsair Builder Series CX500V2 Lian Li PC-Q11B TrendNet TEW-684UB 
View all
CPUMotherboardGraphicsRAM
Intel i5-3210M Dell 04G65K Intel HD4000 Dell 2x4GB 1600MHz 
Hard DriveOS
Seagate/WD 1TB 5400RPM Windows 7 Home Premium 
View all
  hide details  
Reply
post #9 of 9
9/3/12 at 5:03pm
if you think fans in computer are enough?come on it isnt.cool air is at the bottom and hot air is at the top no mather how you wish it was different!maybe in the quantum world there is a way that it doesnt happen like this but for now in our reality it is hot air going up .so if you do not want to keep doing a rinse and repeat with hot air you want cool supply of air (at the bottom.)there is another reason ,part in the computer warm the air faster then the fan can evacuate it ,but going at it this way they will lesssen the compounding effect of warm air getting warmer etc,why you think they go to such extend at asrock,to move part around just for the lol of it!they got better fish to fry,even if it lower temperature by just 10 degree over the time of day the compounding effect means the actual temperature of the computer tru out the day will probably be 30 degree less.no we probably wont see those difference because these number are already outdone by the new part that are generating a lot of heat.this is why they do this,to bring back temperature to more reasonable level.it will work,i am just surprised they havent optimised the whole computer years ago with this idea in mind!
Reply
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Computer Cases
Overclock.net › Forums › Case Mods & Cases › Computer Cases › Can anybody explain the reasoning between 90/180 degree motherboard rotations in chassis?