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Gap in air cooler

Jurrunio
By Jurrunio
in Cooling
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Go to solution Solved by NMS,

Nothing is wrong here. If you wish however to improve your airflow a bit and direct it into the heatsink more, I'd use a fan rated for radiators (I forgot the bearing type), but basically a fan with small gaps in between the frame, lower blade count, and just larger blades overall.

Fans like that have a more one-way direct flow and not cone-shaped.

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PptksTW.jpg

 

 

That's what I'm currently using. That gap between the heatsink and fan is pretty much allowing all the air to escape without passing through the heatsink. Does that mean I'm doing something wrong? It's not the stock fan.

CPU: i7-2600K 4751MHz 1.44V (software) --> 1.47V at the back of the socket Motherboard: Asrock Z77 Extreme4 (BCLK: 103.3MHz) CPU Cooler: Noctua NH-D15 RAM: Adata XPG 2x8GB DDR3 (XMP: 2133MHz 10-11-11-30 CR2, custom: 2203MHz 10-11-10-26 CR1 tRFC:230 tREFI:14000) GPU: Asus GTX 1070 Dual (Super Jetstream vbios, +70(2025-2088MHz)/+400(8.8Gbps)) SSD: Samsung 840 Pro 256GB (main boot drive), Transcend SSD370 128GB PSU: Seasonic X-660 80+ Gold Case: Antec P110 Silent, 5 intakes 1 exhaust Monitor: AOC G2460PF 1080p 144Hz (150Hz max w/ DP, 121Hz max w/ HDMI) TN panel Keyboard: Logitech G610 Orion (Cherry MX Blue) with SteelSeries Apex M260 keycaps Mouse: BenQ Zowie FK1

 

Model: HP Omen 17 17-an110ca CPU: i7-8750H (0.125V core & cache, 50mV SA undervolt) GPU: GTX 1060 6GB Mobile (+80/+450, 1650MHz~1750MHz 0.78V~0.85V) RAM: 8+8GB DDR4-2400 18-17-17-39 2T Storage: HP EX920 1TB PCIe x4 M.2 SSD + Crucial MX500 1TB 2.5" SATA SSD, 128GB Toshiba PCIe x2 M.2 SSD (KBG30ZMV128G) gone cooking externally, 1TB Seagate 7200RPM 2.5" HDD (ST1000LM049-2GH172) left outside Monitor: 1080p 126Hz IPS G-sync

 

Desktop benching:

Cinebench R15 Single thread:168 Multi-thread: 833 

SuperPi (v1.5 from Techpowerup, PI value output) 16K: 0.100s 1M: 8.255s 32M: 7m 45.93s

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That's not really how fans work. Air doesn't just "escape" like that, a fair sum will still be going through the fins. It'll be fine.

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Nothing is wrong here. If you wish however to improve your airflow a bit and direct it into the heatsink more, I'd use a fan rated for radiators (I forgot the bearing type), but basically a fan with small gaps in between the frame, lower blade count, and just larger blades overall.

Fans like that have a more one-way direct flow and not cone-shaped.

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@Jade @NMS Just to add that the fan is pushing air towards the heatsink, rather than pulling away. The reason why I'm asking is that the stock fan is thinner than this one so it sits closer to the heatsink

CPU: i7-2600K 4751MHz 1.44V (software) --> 1.47V at the back of the socket Motherboard: Asrock Z77 Extreme4 (BCLK: 103.3MHz) CPU Cooler: Noctua NH-D15 RAM: Adata XPG 2x8GB DDR3 (XMP: 2133MHz 10-11-11-30 CR2, custom: 2203MHz 10-11-10-26 CR1 tRFC:230 tREFI:14000) GPU: Asus GTX 1070 Dual (Super Jetstream vbios, +70(2025-2088MHz)/+400(8.8Gbps)) SSD: Samsung 840 Pro 256GB (main boot drive), Transcend SSD370 128GB PSU: Seasonic X-660 80+ Gold Case: Antec P110 Silent, 5 intakes 1 exhaust Monitor: AOC G2460PF 1080p 144Hz (150Hz max w/ DP, 121Hz max w/ HDMI) TN panel Keyboard: Logitech G610 Orion (Cherry MX Blue) with SteelSeries Apex M260 keycaps Mouse: BenQ Zowie FK1

 

Model: HP Omen 17 17-an110ca CPU: i7-8750H (0.125V core & cache, 50mV SA undervolt) GPU: GTX 1060 6GB Mobile (+80/+450, 1650MHz~1750MHz 0.78V~0.85V) RAM: 8+8GB DDR4-2400 18-17-17-39 2T Storage: HP EX920 1TB PCIe x4 M.2 SSD + Crucial MX500 1TB 2.5" SATA SSD, 128GB Toshiba PCIe x2 M.2 SSD (KBG30ZMV128G) gone cooking externally, 1TB Seagate 7200RPM 2.5" HDD (ST1000LM049-2GH172) left outside Monitor: 1080p 126Hz IPS G-sync

 

Desktop benching:

Cinebench R15 Single thread:168 Multi-thread: 833 

SuperPi (v1.5 from Techpowerup, PI value output) 16K: 0.100s 1M: 8.255s 32M: 7m 45.93s

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2 minutes ago, Jurrunio said:

@Jade @NMS Just to add that the fan is pushing air towards the heatsink, rather than pulling away. The reason why I'm asking is that the stock fan is thinner than this one so it sits closer to the heatsink

In the end, nothing to worry about at all. The only difference in your case might be a single degree difference. If amount of air pushed through per certain period is the same as with the stock one.

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2 minutes ago, NMS said:

In the end, nothing to worry about at all. The only difference in your case might be a single degree difference. If amount of air pushed through per certain period is the same as with the stock one.

The thing is that the leaked air is blowing so hard paper pinned on the bulletin board behind my monitor is waving around....

CPU: i7-2600K 4751MHz 1.44V (software) --> 1.47V at the back of the socket Motherboard: Asrock Z77 Extreme4 (BCLK: 103.3MHz) CPU Cooler: Noctua NH-D15 RAM: Adata XPG 2x8GB DDR3 (XMP: 2133MHz 10-11-11-30 CR2, custom: 2203MHz 10-11-10-26 CR1 tRFC:230 tREFI:14000) GPU: Asus GTX 1070 Dual (Super Jetstream vbios, +70(2025-2088MHz)/+400(8.8Gbps)) SSD: Samsung 840 Pro 256GB (main boot drive), Transcend SSD370 128GB PSU: Seasonic X-660 80+ Gold Case: Antec P110 Silent, 5 intakes 1 exhaust Monitor: AOC G2460PF 1080p 144Hz (150Hz max w/ DP, 121Hz max w/ HDMI) TN panel Keyboard: Logitech G610 Orion (Cherry MX Blue) with SteelSeries Apex M260 keycaps Mouse: BenQ Zowie FK1

 

Model: HP Omen 17 17-an110ca CPU: i7-8750H (0.125V core & cache, 50mV SA undervolt) GPU: GTX 1060 6GB Mobile (+80/+450, 1650MHz~1750MHz 0.78V~0.85V) RAM: 8+8GB DDR4-2400 18-17-17-39 2T Storage: HP EX920 1TB PCIe x4 M.2 SSD + Crucial MX500 1TB 2.5" SATA SSD, 128GB Toshiba PCIe x2 M.2 SSD (KBG30ZMV128G) gone cooking externally, 1TB Seagate 7200RPM 2.5" HDD (ST1000LM049-2GH172) left outside Monitor: 1080p 126Hz IPS G-sync

 

Desktop benching:

Cinebench R15 Single thread:168 Multi-thread: 833 

SuperPi (v1.5 from Techpowerup, PI value output) 16K: 0.100s 1M: 8.255s 32M: 7m 45.93s

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This is normal and the gap will vary depending on the cooler. Sealing the gap with tape can improve performance but the difference is generally smaller with less restrictive coolers. For a rad with mid to high fpi or a dense heatsink, this can mean ~2-3c lower load temps. For a heatsink like the Hyper 212 with medium fin density, the difference is probably <1c. 

1 minute ago, Jurrunio said:

The thing is that the leaked air is blowing so hard paper pinned on the bulletin board behind my monitor is waving around....

Chances are that this is caused by airflow from someplace other than the gap.

If you ever need help with a build, read the following before posting: http://linustechtips.com/main/topic/3061-build-plan-thread-recommendations-please-read-before-posting/
Also, make sure to quote a post or tag a member when replying or else they won't get a notification that you replied to them.

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I cut a thin strip of foil tape and taped off the gap on both sides, just to force all the air through the heatsink. I didn't notice any cooling difference, but at least it didn't look inefficient. 

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13 minutes ago, WoodenMarker said:

Chances are that this is caused by airflow from someplace other than the gap.

The CPU fan is one of two fans I have in the PC. The other is a weak 90mm case fan so I suspect the CPU cooler fan to be the culprit

CPU: i7-2600K 4751MHz 1.44V (software) --> 1.47V at the back of the socket Motherboard: Asrock Z77 Extreme4 (BCLK: 103.3MHz) CPU Cooler: Noctua NH-D15 RAM: Adata XPG 2x8GB DDR3 (XMP: 2133MHz 10-11-11-30 CR2, custom: 2203MHz 10-11-10-26 CR1 tRFC:230 tREFI:14000) GPU: Asus GTX 1070 Dual (Super Jetstream vbios, +70(2025-2088MHz)/+400(8.8Gbps)) SSD: Samsung 840 Pro 256GB (main boot drive), Transcend SSD370 128GB PSU: Seasonic X-660 80+ Gold Case: Antec P110 Silent, 5 intakes 1 exhaust Monitor: AOC G2460PF 1080p 144Hz (150Hz max w/ DP, 121Hz max w/ HDMI) TN panel Keyboard: Logitech G610 Orion (Cherry MX Blue) with SteelSeries Apex M260 keycaps Mouse: BenQ Zowie FK1

 

Model: HP Omen 17 17-an110ca CPU: i7-8750H (0.125V core & cache, 50mV SA undervolt) GPU: GTX 1060 6GB Mobile (+80/+450, 1650MHz~1750MHz 0.78V~0.85V) RAM: 8+8GB DDR4-2400 18-17-17-39 2T Storage: HP EX920 1TB PCIe x4 M.2 SSD + Crucial MX500 1TB 2.5" SATA SSD, 128GB Toshiba PCIe x2 M.2 SSD (KBG30ZMV128G) gone cooking externally, 1TB Seagate 7200RPM 2.5" HDD (ST1000LM049-2GH172) left outside Monitor: 1080p 126Hz IPS G-sync

 

Desktop benching:

Cinebench R15 Single thread:168 Multi-thread: 833 

SuperPi (v1.5 from Techpowerup, PI value output) 16K: 0.100s 1M: 8.255s 32M: 7m 45.93s

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Just now, Jurrunio said:

The CPU fan is one of two fans I have in the PC. The other is a weak 90mm case fan so I suspect the CPU cooler fan to be the culprit

Yeah but that's not necessarily from the gap. 

If you ever need help with a build, read the following before posting: http://linustechtips.com/main/topic/3061-build-plan-thread-recommendations-please-read-before-posting/
Also, make sure to quote a post or tag a member when replying or else they won't get a notification that you replied to them.

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8 hours ago, Jurrunio said:

@Jade @NMS Just to add that the fan is pushing air towards the heatsink, rather than pulling away. The reason why I'm asking is that the stock fan is thinner than this one so it sits closer to the heatsink

There's flaw in that last part. Even thinner fan with same frame size would be as far from heatsink. Purely because of the way heatsink is designed. If stock would be smaller, then it might be closer to heatsink.

 

Other thing is how well it cools. If current cools better, I see no issue. Third would be airflow waving stuff outside the case. This would require side panel to be open for one and case being right next to thing it waves. And if "escaping" air still manages to do it, fan is far from weak. Heatsinks are designed in way where fins don't really block any airflow. As most of the air goes through and some escapes, that escaping maybe 25% would need to come from iPPC or Delta fan.

^^^^ That's my post ^^^^
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If it really bothers you then tape it up. You should get an intake case fan and put your side cover on so you don't blow papers around.

Black Knight-

Ryzen 5 5600, GIGABYTE B550M DS3H, 16Gb Corsair Vengeance LPX 3000mhz, Asrock RX 6800 XT Phantom Gaming,

Seasonic Focus GM 750, Samsung EVO 860 EVO SSD M.2, Intel 660p Series M.2 2280 1TB PCIe NVMe, Linux Mint 20.2 Cinnamon

 

Daughter's Rig;

MSI B450 A Pro, Ryzen 5 3600x, 16GB Corsair Vengeance LPX 3000mhz, Silicon Power A55 512GB SSD, Gigabyte RX 5700 Gaming OC, Corsair CX430

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