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Move PSU to top/front for better airflow to GPU

post #1 of 13
Thread Starter 
I have a Lian Li PC-V700 with a bottom/front mountet PSU, which prevents a lot of airflow to the GPU. It also only has one 140mm intake fan at the front, that I always run at full speed. I want to achieve positive air pressure and also get more airflow to the GPU. I've tried to use the top fans as intake but without success, most likely because the air gets pushed back by the CPU heatsink immediately.

Since I only use one SSD and no ODD, I've already removed the HDD/ODD mount in the front.

This is what it looks like at the moment:

(intake=blue; outtake=red)


I need your opinion on the following options:


1.
Swap the fans around to get more intake fans and airflow from back > front.
(Wouldn't fix the GPU airflow issue, but would be the easiest and cheapest option)


2.
Buy a Lian Li BS-08B and use it as additional intake.

(I have no clue how efficient that thing is. Maybe some of you have experience with those PCI slot coolers)


3.
Move the PSU to the top/front and add a second 140mm intake to the front. Maybe a third on the bottom where the PSU was, but that might be unnecessary.


It would probably be the best option, but I need to make a custom mount for the fans aswell as the PSU. I could also turn the PSU around to have the intake at the top, but I'm pretty sure I'd mess the case up with the tools I have, when cutting the venting hole.
Another benefit would be, that the case could be used for 2-way/3-way GPU setups, which are impossible due to PSU cables at the moment.

I'd also get a Lian Li BZ-501B for the new PSU outtake.



So, what do you think? Is it worth the effort, or would you just go with the easier option?

Thanks for any input! thumb.gif
post #2 of 13
Go with the move psu to top front and add a 2nd 140mm fan in front as intake.
Old X58
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Old X58
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CPUMotherboardGraphicsRAM
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Crucial MX100 256 gig Crucial M500 120gig WD VelociRaptor 1TB Noctua 
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Windows 7 Pro 64bit LG 29inch widescreen DP LG 29inch widescreen DP Corsair K65 
PowerCaseMouseAudio
EVGA SuperNova G2 1000w Corsair C70 Corsair M65 Sound Blaster Z 
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Custom sleeved psu cables 
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post #3 of 13
Agree, psu on top...only sucky part is the PSU exhausts right by the case intakes - as a general guideline I don't like to mix the ins with the outs. Maybe install an unsightly 'deflector plate' between psu exhaust and case intakes.

Or..a more radical solution. Fabricate a plinth for the case containing the psu. Seems like too much work? Maybe. But, doesn't have to be. The PSU can be the plinth itself sort of. PSU intake at bottom. Fabricate some custom feet or ready-rod feet extensions for existing feet placement. The bottom psu intake area can be snipped out and transformed into a cable pass-through and general lounge area. And 'cable modesty' panels could be constructed with the ghetto-mod materials of choice. Foam-art board, sign board or simple yellow do-not-cross tape.

Ok, still seems like too much work. Just stick the psu on top of the case at the back, with its exhaust exhausting out back - run cables through one of top fan openings and try to remember that fresh cool intake air is more important than ever looking at the top of the case again. biggrin.gif

Or....don't fight city hall or Lian Li reverse flow engineering and purchase a new case with known good front-to-back airflow.
post #4 of 13
Thread Starter 
Don't have the money to spend for a new decent case atm. A bit steel sheet should be affordable.

Probably gonna make two seperate mountings like this:

Also a sabilizer for the rear part of the PSU.

My biggest problem is space, because the PSU needs to be ~30-35mm away from the case front to fit the angeld PSU plug in there (definitely wanna guide the cable inside the case to the back). That leaves ~20mm space between the back of the PSU and the top outtake fans. I need to somehow fit the PCIe power connector in there. But I think I'm going to try it, it if i find some time the next weeks rolleyes.gif
Quote:
Originally Posted by MicroCat View Post

remember that fresh cool intake air is more important than ever looking at the top of the case again. biggrin.gif

Too worried about vomiting into my PSU if I accidently take a look puke.gif
post #5 of 13
Quote:
Originally Posted by Fylzka View Post

Don't have the money to spend for a new decent case atm. A bit steel sheet should be affordable.

Probably gonna make two seperate mountings like this:

Also a sabilizer for the rear part of the PSU.

My biggest problem is space, because the PSU needs to be ~30-35mm away from the case front to fit the angeld PSU plug in there (definitely wanna guide the cable inside the case to the back). That leaves ~20mm space between the back of the PSU and the top outtake fans. I need to somehow fit the PCIe power connector in there. But I think I'm going to try it, it if i find some time the next weeks rolleyes.gif
Too worried about vomiting into my PSU if I accidently take a look puke.gif

Yeah, there's always that possibility. But, what doesn't hurl doesn't hurt. ;-)

Don't want to try the plinth idea? That's what I'd do. Ten minutes with the tin snips and duct tape. Just don't look down. tongue.gif

If you can afford sheet metal work, you can afford a luxury sheet metal PSU plinth box.
post #6 of 13
Thread Starter 
Quote:
Originally Posted by MicroCat View Post

If you can afford sheet metal work

Well i can only afford sheet metal biggrin.gif bending, drillig and cutting threads would be my task thumb.gif
post #7 of 13
Quote:
Originally Posted by Fylzka View Post

Well i can only afford sheet metal biggrin.gif bending, drillig and cutting threads would be my task thumb.gif

And duct tape application, don't forget that critical step. biggrin.gif
post #8 of 13
Thread Starter 
Quote:
Originally Posted by MicroCat View Post

And duct tape application, don't forget that critical step. biggrin.gif

I'm down for that step, if you can send me a link of black anodized brushed aluminium duct tabe tongue.gif
post #9 of 13
Quote:
Originally Posted by Fylzka View Post

I'm down for that step, if you can send me a link of black anodized brushed aluminium duct tabe tongue.gif
I'll get my team of black sharpie marker cats on the aluminum foil duct tape right away. smile.gif
post #10 of 13
I'm still puzzled as to why they designed the case with a front bottom mounted psu, first I have ever seen.
this may sound out of this world but have you considered attaching rubber feet to the psu and have it outside of the case sitting next to it?
Just a thought, biggrin.gif
Old X58
(17 items)
 
  
CPUMotherboardGraphicsRAM
i7 970 6 core ASUS Sabertooth X58 MSI GTX 1070 Gaming X GSkill 24 gigs 
Hard DriveHard DriveHard DriveCooling
Crucial MX100 256 gig Crucial M500 120gig WD VelociRaptor 1TB Noctua 
OSMonitorMonitorKeyboard
Windows 7 Pro 64bit LG 29inch widescreen DP LG 29inch widescreen DP Corsair K65 
PowerCaseMouseAudio
EVGA SuperNova G2 1000w Corsair C70 Corsair M65 Sound Blaster Z 
Other
Custom sleeved psu cables 
  hide details  
Reply
Old X58
(17 items)
 
  
CPUMotherboardGraphicsRAM
i7 970 6 core ASUS Sabertooth X58 MSI GTX 1070 Gaming X GSkill 24 gigs 
Hard DriveHard DriveHard DriveCooling
Crucial MX100 256 gig Crucial M500 120gig WD VelociRaptor 1TB Noctua 
OSMonitorMonitorKeyboard
Windows 7 Pro 64bit LG 29inch widescreen DP LG 29inch widescreen DP Corsair K65 
PowerCaseMouseAudio
EVGA SuperNova G2 1000w Corsair C70 Corsair M65 Sound Blaster Z 
Other
Custom sleeved psu cables 
  hide details  
Reply
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