Please review my pc...

[Mahbub]

So i shifted to top exhaust instead of rear. I changed rear to intake plus the two front intakes.. positive pressure is my goal..  please give your thoughts..

[LaughingHyena]

The rout of the air would be pretty bad in that configuration, as air would just go in the back and immediately out the top without cooling much. Are you able to move the top fan more towards the front of the case, but keep it on top? I would do that, and change it to an intake, and change the rear fan to an exhaust. That should help with a little better airflow.

[Bombastinator]

Rear fans used for intake for positive pressure can benefit from dust filters.  There may be one.

[Ralf]

I like it that the cpu fan sucks the hot air out of the gpu.

[Bombastinator]

The cpu fan is horizontal.  Some fans handle this well some don’t.  If the fan is sleeve, enlobal, or the wrong type of ball bearing it may wear fast.  If it’s rifle or modified rifle or the right type of ball bearing it won’t.  Applies to top air case fans as well.

[chad89]

From my experience the most thermal load inside the case is gpu. And since you have a cpu fan sucking in all the gpu heat it might be tough to get a great thermal condition for your cpu...Exausting the gpu heat will be the priority, otherwise with full load cpu will hit 90or higher. and also pulling in air from rear doesn't seem like a good idea. I need to know full spec of your computer for further advice. I assume the cpu is 8700k , or 8700. Biggest conern is the case. It cannot suck out gpu heat... I recomand you get a aio 280 at least(only if it is overclocked cpu), front sandwich intake rear top exaust. Or chage the case. Exaust is more important to the thermals of the computer. That case seems not enough for your set. Incase of air cooling, cpu temp tend to be effected significantly by heat stacking inside the case compared to gpu. Try to keep cpu temp under 75 for longer lifespan.

And I hate ZOTAC.

[Bombastinator]

8 minutes ago, chad89 said:

From my experience the most thermal load inside the case is gpu. And since you have a cpu fan sucking in all the gpu heat it might be tough to get a great thermal condition for your cpu...Exausting the gpu heat will be the priority, otherwise with full load cpu will hit 90or higher. and also pulling in air from rear doesn't seem like a good idea. I need to know full spec of your computer for further advice. I assume the cpu is 8700k , or 8700. Biggest conern is the case. It cannot suck out gpu heat... I recomand you get a aio 280 at least, front sandwich pull rear top exaust. Or chage the case. Exaust is more important to the thermals of the computer. That case seems not enough for your set. And I hate ZOTAC.

I’m not in disagreement but I’d call it iffy.  It’s a big cooler, and the GPU heat needs somewhere to go.  The problem with fluid dynamics, which is what airflow is, is it’s crazy complex.  Too complex for rule of thumb.  I’d say test it with an eye to @chad89’s point.  He/she could be right here

[chad89]

11 minutes ago, Bombastinator said:

Too complex for rule of thumb

True. Just gotta try every thing... to find whats best of ones build. Gotta talk with data

[Mahbub]

5 hours ago, chad89 said:

From my experience the most thermal load inside the case is gpu. And since you have a cpu fan sucking in all the gpu heat it might be tough to get a great thermal condition for your cpu...Exausting the gpu heat will be the priority, otherwise with full load cpu will hit 90or higher. and also pulling in air from rear doesn't seem like a good idea. I need to know full spec of your computer for further advice. I assume the cpu is 8700k , or 8700. Biggest conern is the case. It cannot suck out gpu heat... I recomand you get a aio 280 at least(only if it is overclocked cpu), front sandwich intake rear top exaust. Or chage the case. Exaust is more important to the thermals of the computer. That case seems not enough for your set. Incase of air cooling, cpu temp tend to be effected significantly by heat stacking inside the case compared to gpu. Try to keep cpu temp under 75 for longer lifespan.

And I hate ZOTAC.

i5 8600k, 1080 amp extreme.. and i understand.. i ran stress test for 3 hours, cpu hit 75 gpu hit 74. is that ok?

[Mahbub]

7 hours ago, Bombastinator said:

The cpu fan is horizontal.  Some fans handle this well some don’t.  If the fan is sleeve, enlobal, or the wrong type of ball bearing it may wear fast.  If it’s rifle or modified rifle or the right type of ball bearing it won’t.  Applies to top air case fans as well.

ball bearing i thinl.. in a few days m gonna change all fans to noctua

[Mahbub]

9 hours ago, LaughingHyena said:

The rout of the air would be pretty bad in that configuration, as air would just go in the back and immediately out the top without cooling much. Are you able to move the top fan more towards the front of the case, but keep it on top? I would do that, and change it to an intake, and change the rear fan to an exhaust. That should help with a little better airflow.

why i changed the rear to exhaust is because it gets very hoy in summer.. and heat hits the wall and comes back to me..

[Mahbub]

9 hours ago, LaughingHyena said:

The rout of the air would be pretty bad in that configuration, as air would just go in the back and immediately out the top without cooling much. Are you able to move the top fan more towards the front of the case, but keep it on top? I would do that, and change it to an intake, and change the rear fan to an exhaust. That should help with a little better airflow.

and the rear intake has a filter.. very fine.. so like the rear intake is barely sucking in  anything

[Bombastinator]

10 minutes ago, Mahbub said:

ball bearing i thinl.. in a few days m gonna change all fans to noctua

Two bearing should be fine.  One bearing might be passible depending on which end the bearing is on.  Three bearing won’t work. They’re super rare though.  It’s an expensive design generally only seen on older industrial stuff.  Most ball bearing fans are two bearing. The spindle will be louder than a noctua and won’t last quite as long. Still, multiple years before it gets loud.  Ball Bearing fans can run loud for a long time before they actually seize.  It’s why they’re preferred in industrial applications. Should be fine otherwise though.  I invoke the ancient bromide “if it ain’t broke don’t fix it”  They’ll go bad eventually.  You can always replace them then.  Unless of course they’re already bad or something.

[Mahbub]

Just now, Bombastinator said:

Two bearing should be fine.  One bearing might be passible depending on which end the bearing is on.  Three bearing won’t work.   Most fans are two bearing. The spindle will be louder than a noctua and won’t last quite as long.  Should be fine otherwise though.  I invoke the ancient bromide “if it ain’t broke don’t fix it”  They’ll go bad eventually.  You can always replace them then.  Unless of course they’re already bad or something.

haha okk.. m planning to change the two front intake and the top exhaust to noctua nf a14, and the rear intake and the cpu cooler fan to noctua nf f12,

 

also i have a question.. the psu cover of this case is vented, so like when the gpu runs at full load, some amount of gpu hot air is being blown into the psu compartment, the hdds and cables are there too, would that pose any risk? i mean i have seen many modding this case to hold the gpu vertically....

[Bombastinator]

11 minutes ago, Mahbub said:

haha okk.. m planning to change the two front intake and the top exhaust to noctua nf a14, and the rear intake and the cpu cooler fan to noctua nf f12,

 

also i have a question.. the psu cover of this case is vented, so like when the gpu runs at full load, some amount of gpu hot air is being blown into the psu compartment, the hdds and cables are there too, would that pose any risk? i mean i have seen many modding this case to hold the gpu vertically....

I suspect it’s the reverse.

Generally PSUs are designed to suck air in from the side (or sometimes front) and blow it out the back. Many modern cases are designed so the PSU sucks air out the bottom through its own filtered hole and blows it out the back.  In these cases the fan heat transfer is near zero.  I suspect the the vents in the shroud are so if you want you can flip the PSU upside down and cause it to draw air in from the case and blow it out the back, so basically the opposite.  Old PSUs that had always on fans used to actually be used for air exhaust in this fashion.  Modern ones have more advanced fan control and don’t do it so well.  One ironic modern problem is some people try to figure out how to disable the advanced fan control so they can flip the PSU and use it to help with exhaust air.

[Mahbub]

4 minutes ago, Bombastinator said:

I suspect it’s the reverse.

Generally PSUs are designed to suck air in from the side (or sometimes front) and blow it out the back. Many modern cases are designed so the PSU sucks air out the bottom through its own filtered hole and blows it out the back.  In these cases the fan heat transfer is near zero.  I suspect the the vents in the shroud are so if you want you can flip the PSU upside down and cause it to draw air in from the case and blow it out the back, so basically the opposite.  Old PSUs that had always on fans used to actually be used for air exhaust in this fashion.  Modern ones have more advanced fan control and don’t do it so well.  One ironic modern problem is some people try to figure out how to disable the advanced fan control so they can flip the PSU and use it to help with exhaust air.

ohh okk.. but like so means i shouldnt be concerned about some heat going from the gpu into the shroud? my ocd is bothering me

[Bombastinator]

9 minutes ago, Mahbub said:

ohh okk.. but like so means i shouldnt be concerned about some heat going from the gpu into the shroud? my ocd is bothering me

You should not be concerned.  If anything it will help.  OCD sucks.  My condolences.

[Mahbub]

16 minutes ago, Bombastinator said:

You should not be concerned.  If anything it will help.  OCD sucks.  My condolences.

Thank you so much pal.

[WoodenMarker]

1 hour ago, Mahbub said:

i5 8600k, 1080 amp extreme.. and i understand.. i ran stress test for 3 hours, cpu hit 75 gpu hit 74. is that ok?

Your temps are fine. Why did you want to change fans?

[Mahbub]

thanks.. i need better non led fans.. these i am using are sickleflow.. not that good.. also for the top exhaust wanna get a bigger fan pushing more air... i will change the front two fans and the top exhaust to 140mm noctuas

[Bombastinator]

2 minutes ago, Mahbub said:

thanks.. i need better non led fans.. these i am using are sickleflow.. not that good.. also for the top exhaust wanna get a bigger fan pushing more air... i will change the front two fans and the top exhaust to 140mm noctuas

What makes a fan good or bad is what orientations it can be long lasting in and how loud they are.  They might be fine for what you are doing.  Sleeve bearing fans are fine if they are vertical. It’s when they are turned horizontal that they start to suck.  Given the current configuration front and back would be fine.  It’s the cpu and top fans that might have a problem.

[Mahbub]

Just now, Bombastinator said:

What makes a fan good or bad is what orientations it can be long lasting in and how loud they are.  They might be fine for what you are doing.  Sleeve bearing fans are fine if they are vertical. It’s when they are turned horizontal that they start to suck.

actually yes the noise is a factor.. also that these have non changeable leds.. i cut off the led wires.. but i dont wanna use fans like this haha.. also like noctua ones r ball bearing.. i want more airflow.. so shifting to 140s

[Bombastinator]

Just now, Mahbub said:

actually yes the noise is a factor.. also that these have non changeable leds.. i cut off the led wires.. but i dont wanna use fans like this haha.. also like noctua ones r ball bearing.. i want more airflow.. so shifting to 140s

140s give more cfm at lower rpm so less net noise.  The cost is in static pressure.  Case fans that don’t have some sort of airflow restriction on them like an AIO or impeding front panel have no real use for static pressure.

[chad89]

4 hours ago, Mahbub said:

i5 8600k, 1080 amp extreme.. and i understand.. i ran stress test for 3 hours, cpu hit 75 gpu hit 74. is that ok?

it seems fine. but I try to keep my 8700k, and gpu 1080ti under 70.

 

some say parts can hold 80, 90 degrees, but some also think its better to keep em around certain temp for the lifespan of the part

[Bombastinator]

22 minutes ago, chad89 said:

it seems fine. but I try to keep my 8700k, and gpu 1080ti under 70.

 

some say parts can hold 80, 90 degrees, but some also think its better to keep em around certain temp for the lifespan of the part

There are two schools of thought on this one.  One is that silicon degrades no matter what you do.  The degradation graph is not even though and below 75c it’s extremely low and drops even faster the cooler it gets.  Another is that this is perilously close to crap because the degradation is so very slow to start with that the rest of your machine will wear out long before your cpu will so it’s stupid.  90c is more than fine.

 

im in the 75c camp myself.  I’m old though.  That’s not totally correct either.  I’m totally in the 90c camp for laptops.  They don’t really have truely replacable parts.  If the motherboard on a laptop goes you’re pretty much hosed and the ports are soldered you the motherboard and all ports wear out.