A stock cooler that whines under load, or a prebuilt with no cooler upgrade path, does not need a $90 fix. Downfire coolers blow air down onto the CPU and the board around it, and many cost less than a game. This guide to the best downfire CPU coolers under $40 compares seven budget models for office PCs, HTPCs and entry gaming builds.
Quick verdict
For most budget builds, the ID-COOLING IS-67-XT Black is the downfire cooler to buy: six heat pipes and a 120mm slim fan in 67mm, listed around $40 on Amazon US as of November 2026 with 4.5 stars. For the lowest cost, the ARCTIC Alpine 17 CO at about $9 suits LGA 1851 and 1700, and the AXP90-X36 fits 36mm cases.
| Cooler | Height | Fan | Sockets (listed) | Rated TDP | Best for | Amazon US, Nov 2026 |
|---|---|---|---|---|---|---|
| AMD Wraith Stealth | Slim (not stated) | 90mm | AM4 | Not stated | Cheapest AM4 spare | about $10, 4.6 stars, 2,110 ratings |
| ARCTIC Alpine 17 CO | 68.2mm | 92mm PWM | LGA 1851, 1700 | Not stated | Cheapest Intel upgrade | about $9, 4.0 stars, 448 ratings |
| Thermaltake Gravity A2 | Not stated | 92mm, 1,200 to 3,500 rpm | AM5, AM4 | 95W | Budget AM5 | about $15, 4.4 stars, 201 ratings |
| Thermaltake UX150 ARGB | Not stated | 130mm, 500 to 2,400 rpm | LGA 1851, 1700, 1200, 115x | 130W | ARGB on Intel | about $21, 4.3 stars, 83 ratings |
| Thermalright AXP90-X36 | 36mm | 92 x 15mm | LGA 1851, 1700, 1200, 115x, AM5, AM4 | Not stated | Thinnest | about $20, 4.5 stars, 136 ratings |
| Thermalright AXP90-X53 Black | 53mm | 92mm TL-9015B | AM4, LGA 1851 to 1150 | Not stated | Four pipes on a budget | about $22, 4.3 stars, 92 ratings |
| ID-COOLING IS-67-XT Black | 67mm | 120 x 15mm | LGA 1851, 1700, 1200, 115x, AM5, AM4 | Not stated | Best overall | about $40, 4.5 stars, 189 ratings |
Prices and ratings are Amazon US snapshots as of November 2026 and will change. Several budget listings give only title-level specs, which we flag in each section rather than filling gaps with assumptions.
How we selected these budget downfire coolers
We filtered our November 11, 2026 Amazon US data for top-flow coolers listed at $40 or less, then kept models with current or still-common sockets and meaningful ratings pools. Budget coolers often have thin listings, so we preferred models with stated dimensions, heat pipes or fan specs.
Specs come from Thermalright’s AXP90-X36 page and the Amazon listings for the other coolers. Where a listing gives only a title, as with the two Thermaltake models, we treat wattage figures as maker claims and say what is missing, such as height or warranty.
We did not test these coolers. Budget downfire coolers are built for 65W-class processors, so we match each to AMD and Intel chips at that level and explain where a cheap upgrade makes sense and where you should spend more on a tower cooler instead.
Best downfire CPU coolers under $40, reviewed
The seven coolers below run from a $9 Intel push-pin cooler to a six-pipe slim cooler at about $40. Each section covers listed specs, sockets, the CPUs each one suits and what the listing leaves out, so you can choose a cheap downfire cooler that fits your board, case and processor.
AMD Wraith Stealth
The Wraith Stealth is the cheapest spare for AM4 systems. Its listing describes an aluminum heatsink with pre-applied thermal paste, direct screw mounting to AM4 boards, a 90mm fan and a 4-pin PWM connector with a cable about 9 inches long. It is the same style of cooler AMD has bundled with 65W Ryzen chips.
It was listed around $10 on Amazon US as of November 2026 with 4.6 stars from about 2,110 ratings, the largest pool here. It suits a 65W AM4 chip that lost its original cooler, or an AM4 office PC that needs a working replacement quickly. The listing names only AM4.
It is a basic aluminum cooler, so do not expect a quieter or cooler system than stock; it simply restores stock cooling. If your CPU is a 105W part or you want lower noise, one of the heat-pipe coolers below is a better use of a little more money.
- Pro: lowest-cost AM4 replacement
- Pro: pre-applied paste, huge owner base
- Con: AM4 only
- Con: no improvement over stock cooling
Buy it if you need a cheap AM4 replacement cooler today. Skip it if you want lower noise or AM5 support.
ARCTIC Alpine 17 CO
The Alpine 17 CO is the cheapest Intel upgrade. Its listing says it is made exclusively for LGA 1851 and LGA 1700, with a 68.2mm installation height, a 92mm PWM fan up to 2,700 rpm, a Y-shaped radial fin design, pre-applied MX thermal paste, pre-mounted push pins and a six-year warranty.
It was listed around $9 on Amazon US as of November 2026 with 4.0 stars from about 450 ratings. Push pins make installation simple, which suits office PCs and beginners. The six-year warranty is unusually long for a cooler at this price, and the listing rates fan noise at 0.5 sone.
The 4.0-star average is the lowest here, and an aluminum radial heatsink has limited capacity, so it suits 65W Intel chips rather than unlocked K or Core Ultra 9 parts. Intel lists 250W maximum turbo for the Core Ultra 9 285K, far beyond what this cooler is meant for.
- Pro: about $9 with a six-year warranty
- Pro: push-pin install, pre-applied MX paste
- Con: Intel LGA 1851 and 1700 only
- Con: lowest average rating here
Buy it if you need a cheap, easy cooler for a 65W Intel PC. Skip it if you run an unlocked Core i7 or i9.
Thermaltake Gravity A2
The Gravity A2 is the budget AM5 pick. Its Amazon title lists a 92mm 4-pin PWM fan at 1,200 to 3,500 rpm, an aluminum extrusion heatsink, a 95W rating and AM5 and AM4 support. Our data has no bullet points for this model, so height and warranty are not confirmed.
It was listed around $15 on Amazon US as of November 2026 with 4.4 stars from about 200 ratings. That makes it the cheapest AM5 option in this list, which matters because many AM5 Ryzen chips, like the 65W Ryzen 5 7600, suit a small cooler but some ship without one.
A 3,500 rpm fan will be loud at full speed, so set a fan curve. The 95W figure is Thermaltake’s own claim; for 105W chips such as the Ryzen 7 7700X, a heat-pipe cooler is a safer choice. Confirm the height against your case before buying.
- Pro: cheapest AM5 downfire cooler here
- Pro: PWM fan with wide speed range
- Con: height and warranty not confirmed
- Con: loud at maximum speed
Buy it if you need a cheap AM5 cooler for a 65W Ryzen. Skip it if you want quiet operation under load.
Thermaltake UX150 ARGB
The UX150 ARGB is the lit Intel pick. Its Amazon title lists a copper base with aluminum fins, a 130mm PWM fan at 500 to 2,400 rpm with an infinity mirror ARGB effect, a 130W rating and LGA 1851, 1700, 1200 and 115x support. Our data has no bullet points, so height and warranty are not confirmed.
It was listed around $21 on Amazon US as of November 2026 with 4.3 stars from about 80 ratings. A 130mm fan is larger than the 90mm and 92mm fans on most coolers here, which can move the same air at lower speeds, and its low 500 rpm minimum helps quiet idle.
No AMD sockets are listed in the title, so it is for Intel builds only. The 130W figure is a maker claim; it suits 65W Intel chips such as non-K Core i5 parts comfortably. Check the height against your case, since it is not stated in our data.
- Pro: large 130mm fan with ARGB
- Pro: copper base, low minimum speed
- Con: Intel only
- Con: height and warranty not confirmed
Buy it if you want a cheap lit cooler for an Intel PC. Skip it if you run AMD.
Thermalright AXP90-X36
The AXP90-X36 is the thinnest budget pick. Thermalright lists a 94.5 x 95 x 21mm heatsink with a 92 x 15mm TL-9015 fan for 36mm total, four 6mm heat pipes, and LGA 1851, 1700, 1200, 115x, AM4 and AM5 support. The listing adds nickel plating, a 22.4 dBA noise figure and a metal backplate mount.
It was listed around $20 on Amazon US as of November 2026 with 4.5 stars from about 140 ratings. At 36mm, it fits slim HTPC and ITX cases that rule out almost every other cooler, and it costs far less than premium 37mm coolers.
Four heat pipes in such a thin heatsink suit 65W chips such as the Ryzen 5 8600G or a non-K Core i5. The fan reaches 2,700 rpm, so expect noise under heavy load. For more capacity at a similar price, the AXP90-X53 adds height and fin area.
- Pro: 36mm with four heat pipes
- Pro: current Intel and AMD sockets
- Con: limited capacity
- Con: fan loud near full speed
Buy it if your case allows only about 40mm. Skip it if you have more room.
Thermalright AXP90-X53 Black
The AXP90-X53 Black is the step up in height. Its Amazon title gives a 53mm height, four heat pipes and a TL-9015B 90mm PWM fan, with AM4 and Intel LGA 1150, 1151, 1155, 1156, 1200 and 1851 named. AM5 is not listed in this version’s title, so AM5 buyers should confirm with the seller or choose another model.
It was listed around $22 on Amazon US as of November 2026 with 4.3 stars from about 90 ratings. The extra 17mm over the X36 adds fin area for the same fan size, which helps it cool the same chips more quietly in cases with 55mm or more of clearance.
It suits 65W AM4 and Intel chips in small cases and office towers. Our data does not list a warranty. If you need AM5 support or a larger fan in a similar height, the IS-67-XT is the better pick for about $18 more.
- Pro: four pipes and more fin area than the X36
- Pro: low price
- Con: AM5 not listed for this version
- Con: warranty not stated
Buy it if you have an AM4 or Intel board and about 55mm of clearance. Skip it if you are on AM5.
ID-COOLING IS-67-XT Black
The IS-67-XT Black is our top pick. Its listing gives a 67mm total height, a copper base, six heat pipes and a 120 x 15mm PWM fan with up to 67.58 CFM, plus LGA 1851, 1700, 1200, 115x, AM5 and AM4 support and good memory compatibility on mini-ITX boards.
It was listed around $40 on Amazon US as of November 2026 with 4.5 stars from about 190 ratings. Six heat pipes and a 120mm fan give it the most capacity in this list, so it can handle 65W chips quietly and offers some margin for 105W parts with a fan curve.
It is the most expensive cooler here, but still well under the cost of premium slim coolers. At 67mm, it fits many ITX and micro-ATX cases and every standard tower. Check that the 120mm footprint clears tall RAM and VRM heatsinks on small boards.
- Pro: six heat pipes and a 120mm fan
- Pro: current Intel and AMD sockets
- Con: top of the budget
- Con: warranty not stated
Buy it if you want the most capable budget downfire cooler. Skip it if your case allows under 67mm.
Buying a budget downfire cooler
Cheap downfire coolers are a smart upgrade only when they match the CPU and case. The points below explain when to upgrade from stock, how to read thin budget listings, which sockets need attention and how to keep a small fan quiet, so a $20 cooler does what you expect.
When a cheap upgrade makes sense
A budget downfire cooler makes sense for 65W chips such as the Ryzen 5 7600, Ryzen 5 8600G or a non-K Core i5, in office PCs, HTPCs and small builds. It can replace a missing or noisy stock cooler and adds airflow over RAM and VRMs around the socket.
It does not make sense for hot chips. Intel lists 250W maximum turbo for the Core Ultra 9 285K, and AMD rates the Ryzen 9 7950X at 170W. For those processors, spend more on a tower or an AIO rather than stretching a budget cooler past its design.
Reading thin budget listings
Budget listings often give a wattage rating and little else. Treat figures such as the Gravity A2’s 95W and the UX150’s 130W as maker claims, and look for stated heights, heat pipe counts and fan sizes, which are more useful for comparing one budget cooler against another.
Heat pipes matter: the IS-67-XT’s six and the AXP90 models’ four move heat more effectively than a plain aluminum block like the Wraith Stealth. When a listing omits height, check the manufacturer’s page or ask the seller before buying for a tight case.
Socket support to double-check
Budget coolers often cover a narrower set of sockets. The Wraith Stealth is AM4 only, the Alpine 17 CO is LGA 1851 and 1700 only, the UX150 is Intel only, and the AXP90-X53 Black does not list AM5. Match the socket before checking anything else on the listing.
Keep the stock AMD backplate on AM4 and AM5 boards unless the cooler’s manual says to remove it, and keep the original screws. Intel push-pin coolers like the Alpine 17 CO need firm, even pressure on each pin to seat properly.
Keeping small fans quiet
Small fans spin fast: the Gravity A2 reaches 3,500 rpm and the AXP90 coolers 2,700 rpm. Set a fan curve in the BIOS that keeps speeds low at idle and ramps only under sustained load, which matters most in a living-room HTPC or a quiet home office PC.
Larger fans help. The UX150’s 130mm fan and the IS-67-XT’s 120mm fan can move the same air at lower speeds than 90mm fans. Make sure the case has an air intake near the cooler, since a downfire fan needs a supply of cool air.
FAQ
These answers cover common questions about budget downfire coolers, from whether they beat stock coolers to which sockets they support. They draw on the Amazon listings and Thermalright’s specs above, collected in November 2026, and avoid temperature or noise comparisons we could not confirm from a published test.
Which of the best downfire CPU coolers is the best value?
The ID-COOLING IS-67-XT Black, at about $40 on Amazon US as of November 2026, offers six heat pipes and a 120mm fan in a 67mm height with current sockets. If your budget is tighter, the Thermalright AXP90-X36 at about $20 adds four heat pipes in just 36mm.
Is a downfire cooler better than a stock cooler?
Heat-pipe models such as the IS-67-XT and AXP90 coolers usually offer more capacity than a basic aluminum stock cooler. A plain replacement like the Wraith Stealth only matches stock cooling. Choose a heat-pipe cooler if your goal is lower noise at the same load.
Do budget downfire coolers work on AM5?
Some do, but not all of them. The IS-67-XT, AXP90-X36 and Gravity A2 list AM5. The Wraith Stealth is AM4 only, the AXP90-X53 Black does not list AM5 in its title, and the Alpine 17 CO and UX150 are Intel only. Check the exact listing and version before you buy.
Is downfire the same as top-flow?
Yes. Downfire, top-flow, down blowing and downdraft all describe coolers whose fan pushes air down through the heatsink toward the motherboard. The budget models here are the entry-level end of that design, built for 65W-class processors in small or quiet PCs.
Conclusion
Buy the ID-COOLING IS-67-XT Black if you want the best downfire CPU cooler under $40: six heat pipes, a 120mm fan and current Intel and AMD sockets at 67mm. If your case allows only about 40mm, choose the Thermalright AXP90-X36 instead for four heat pipes at 36mm for about $20.
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