The DeepCool AK620 launched in 2021 as a budget dual-tower that genuinely threatened Noctua’s position — and the 2024 revision added LGA1851 support for Intel’s Core Ultra 200 series, keeping it relevant for current builds. At ~$65, it benchmarks within 2°C of the Noctua NH-D15 G2, a cooler that costs $179. If you’re building with a Ryzen 7 9800X3D, Core Ultra 5 245K, or anything else in the 125–200W TDP range, the AK620 is almost certainly the only air cooler you need to look at.
Quick Picks
- Best value overall: DeepCool AK620 — dual-tower performance within 2°C of the NH-D15 G2 at $65
- Best under $40: Thermalright Peerless Assassin 120 SE V2 — 265W TDP, AGHP GEN 5.0 heatpipes, genuinely impressive for the price
- Best for black builds: DeepCool AK620 Zero Dark — full all-black hardware, identical thermals to the standard AK620
- Best peak performance: Noctua NH-D15 G2 — the reference point for air cooling, at a price to match
Buying Guide: What to Know Before You Buy
Dual tower vs. single tower
A dual-tower design — two stacked fin arrays with a fan sandwiched between them — dissipates heat across more surface area than a single-tower cooler. In practice, this means a dual-tower running fans at 1000 RPM can match the temperature of a single-tower running at 1400 RPM, which is why they’re popular in quiet builds. Every cooler on this list is dual-tower.
TDP ratings aren’t exact — but they’re a useful guide
Manufacturers rate their coolers at a “max TDP” that reflects sustained full-load capability under controlled conditions. The AK620 is rated at 260W. In practice, a Ryzen 9 9950X pushing 200W under Cinebench can run it close to the limit. A Ryzen 5 9600X at 65W TDP barely stresses it. If you’re running an Intel Core Ultra 9 285K at default power limits (253W), the NH-D15 G2 is a safer choice.
160mm height fits most mid-towers — but check your case spec sheet
The AK620 is 160mm tall. Common mid-tower cases like the Fractal Design North (170mm clearance), Lian Li Lancool III (174mm), and Corsair 4000D Airflow (170mm) all fit it with room to spare. Tighter cases — especially Fractal Meshify Mini C, NZXT H510, or any mATX case under 165mm clearance — should be verified before ordering.
RAM clearance: the real gotcha with dual towers
The AK620’s 43mm RAM clearance is measured from the motherboard surface to the lowest fan blade in the standard mounting position. Most DDR5 kits have heatspreaders between 35–45mm tall. Kingston Fury Beast DDR5 (38mm) and G.Skill Trident Z5 Neo (44mm) fit. G.Skill Trident Z5 RGB with the tall fin stack (~51mm) does not — you’d need to move the outer fan up or switch to the Noctua NH-D15 G2 with LBC mode, which offers 64mm clearance.
AM5 and LGA1851 mounting
Both the standard AK620 and the Zero Dark include the mounting hardware for AM5 (Zen 4/Zen 5) and LGA1851 (Core Ultra 200) out of the box. If you have an older board (AM4, LGA1700), that hardware is also included. No adapter kit required.
Detailed Reviews
DeepCool AK620
DeepCool AK620
The standard AK620 is the version most buyers should get. Six copper heatpipes pull heat from a raised nickel-plated copper base and distribute it across a dense dual-tower fin array. Two 120mm FDB (fluid dynamic bearing) fans push 68.99 CFM each at a maximum 1850 RPM, with noise that stays under 28 dBA at full speed.
In third-party benchmarks comparing the AK620 Digital (identical cooling hardware) against the Noctua NH-D15 G2 on a Core i7-13700K under full Cinebench load, the AK620 Digital came in at approximately 78.1°C versus the NH-D15 G2’s 76.1°C — a 2°C gap. Against the be quiet! Dark Rock Pro 5, the AK620 ran 3–5°C cooler in the same comparison. For a cooler that retails around $65, those results are exceptional.
Installation is straightforward. The backplate drops into the motherboard without needing to remove it from the case, and the mounting arms lock onto AMD or Intel standoffs before the cooler drops in and tightens with a single screwdriver. The process takes under 10 minutes.
The one consistent complaint from owners is RAM clearance. With both fans mounted between and outside the towers in the default configuration, the inner fan sits at 43mm above the motherboard. This blocks DDR5 kits with heatspreaders taller than ~43mm in slot 1. Shifting the inner fan up one row clears most tall kits but slightly reduces cooling efficiency.
Thermalright Peerless Assassin 120 SE V2
Thermalright Peerless Assassin 120 SE V2
At $35, the Peerless Assassin 120 SE V2 is the most capable dual-tower air cooler you can buy for under $40. It uses six 6mm copper heatpipes with Thermalright’s AGHP GEN 5.0 (Advanced Golden Heatpipe) technology, which improves capillary structure density for better wicking at the evaporator end. The result: a 265W TDP rating — marginally higher than the AK620’s 260W despite a lower price.
The fans are the point of differentiation. The V2’s TL-C12C-X28 fans spin up to 1850 RPM and push 88.89 CFM, compared to the AK620’s 68.99 CFM. More airflow means better cooling at maximum load. The trade-off is noise: 29.5 dBA at full tilt versus the AK620’s under 28 dBA. At moderate fan curves (under 1200 RPM), both coolers are essentially inaudible from a meter away.
This is the cooler for a Ryzen 5 9600X, Core Ultra 5 225, or any chip that won’t exceed 180W under sustained load. If your build budget puts you at $500–$800 total, the PA 120 SE V2 frees up $30 for better storage, more RAM, or a faster GPU.
DeepCool AK620 Zero Dark
DeepCool AK620 Zero Dark
The Zero Dark is the AK620 in full matte black. Heatpipes, fin array, mounting hardware, fans — all black. Performance is identical to the standard AK620, since the cooling components are the same. The Zero Dark also carries the LGA1851 bracket for Intel Core Ultra 200 series boards.
The 2024-era Zero Dark listing (B0D89WJ4WT) ships with the updated mounting kit. Owner feedback on the black finish is consistently positive — the nickel plating holds up without oxidizing under heat, which was a concern with early all-black coolers that used painted or anodized finishes instead.
If you’re building in a case with a glass panel and you’ve spec’d black RAM, black GPU, and black fans, the Zero Dark is the obvious choice — pricing has converged with the standard model, so you get the all-black aesthetic at no extra cost. Compare live prices before ordering, as the gap fluctuates.
be quiet! Dark Rock Pro 5
be quiet! Dark Rock Pro 5
The Dark Rock Pro 5 makes a different trade-off than the AK620: it prioritizes acoustics over peak thermal performance. The two Silent Wings 4 fans (135mm front, 120mm rear) max out at 1500 RPM and generate a maximum of 24.3 dBA — noticeably quieter than the AK620 at full speed. In workstation environments, media editing rigs, or any build where audio capture is happening nearby, that noise floor matters.
The thermal trade-off: in third-party comparisons on the same CPU under identical load, the Dark Rock Pro 5 runs 3–5°C warmer than the AK620 Digital variant. Seven heatpipes and a high-density fin stack give it the raw surface area to handle 250W-class CPUs, but the lower fan speed cap means it relies more on passive convection at extreme loads.
At $90, it’s priced between the AK620 ($65) and the NH-D15 G2 ($179) without clearly beating either on value. The acoustic case for it is strong — but buyers who purely want the coldest temps at this price should pick the AK620 over it.
Noctua NH-D15 G2
Noctua NH-D15 G2
The NH-D15 G2 is the reference standard for air cooling. Eight copper heatpipes, a redesigned coldplate geometry that Noctua claims improves contact uniformity on modern CPUs with die-under-lid configurations (like the Ryzen 9000 series), and two 150mm NF-A15x25 G2 fans that push substantial airflow at low RPM. It benchmarks at 76.1°C under Core i7-13700K full Cinebench load — the best result in its price class among retail air coolers.
The LBC (Low Noise Adapter + Better Compatibility) mode is worth highlighting. The standard configuration supports 45mm tall RAM. With the LBC adapter, clearance expands to 64mm, accommodating tall DDR5 heatspreaders that block the AK620. If you’re running G.Skill Trident Z5 RGB or Corsair Vengeance RGB at 51mm+ height, the NH-D15 G2 is the only practical dual-tower option on this list.
At $179, the NH-D15 G2 is hard to justify for most gaming builds. It makes sense for workstations running 285K or 9950X at sustained 250W+ loads where 2–3°C of extra thermal headroom translates to longer turbo boost durations. For gaming rigs built around a Ryzen 7 9800X3D or Core Ultra 7 265KF, the AK620 handles the load fine for $114 less.
| Spec | DeepCool AK620 $65 9.2/10 | Thermalright Peerless Assassin 120 SE V2 $35 8.7/10 | DeepCool AK620 Zero Dark $60 9/10 | be quiet! Dark Rock Pro 5 $90 8.8/10 | Noctua NH-D15 G2 $179 9.5/10 |
|---|---|---|---|---|---|
| TDP | 260W | 265W | 260W | 250W | ~330W |
| Height | 160mm | 155mm (without fans) | 160mm | 163mm | 168mm |
| Heatpipes | 6 copper | 6 copper, AGHP GEN 5.0 | 6 copper, all-black | 7 copper | 8 copper |
| Fans | 2× 120mm FDB PWM | 2× 120mm S-FDB PWM | 2× 120mm FDB PWM, all-black | 1× 135mm + 1× 120mm Silent Wings 4 | 2× 150mm NF-A15x25 G2 PWM |
| Fan Speed | 500–1850 RPM | Up to 1850 RPM | 500–1850 RPM | Up to 1500 RPM | Up to 1500 RPM |
| RAM Clearance | 43mm | — | — | — | 64mm (LBC mode) |
| Sockets | LGA1851/1700/1200/115X, AM5/AM4 | LGA1851/1700/115X/1200, AM5/AM4 | LGA1851/1700/1200, AM5/AM4 | LGA1851/1700/1200/115X, AM5/AM4 | LGA1851/1700/1200/115X, AM5/AM4 |
| Rating | 9.2/10 | 8.7/10 | 9/10 | 8.8/10 | 9.5/10 |
FAQ
Does the DeepCool AK620 fit in a mid-tower case?
It needs 160mm of CPU cooler clearance. Most full-size mid-tower cases clear 165–175mm. Verified fits include the Fractal Design North (170mm), Lian Li Lancool III (174mm), Corsair 4000D Airflow (170mm), and Phanteks Eclipse P500A (190mm). Compact cases like the Fractal Meshify Mini C (163mm) are tight — check your case spec sheet before ordering.
Can the AK620 handle a Core Ultra 9 285K or Ryzen 9 9950X?
The 285K at default Intel power limits pulls up to 253W. That’s at the edge of the AK620’s 260W rating, and whether it throttles depends on your ambient temperature and airflow. At 285K PL1 (125W limit), it handles easily. For sustained all-core workloads on chips over 200W, the NH-D15 G2 gives you more thermal margin.
Is the Thermalright Peerless Assassin 120 SE V2 compatible with AM5?
Yes. The V2 includes mounting hardware for Intel LGA1851/1700/1200/115X and AMD AM5/AM4 out of the box.
Does the AK620 Zero Dark perform the same as the standard AK620?
Identical cooling hardware, identical performance. The Zero Dark is the AK620 in all-black — heatpipes, fin array, fans, and mounting brackets are all the same specifications with a black finish. The $4 price difference is purely cosmetic.
What RAM fits under the AK620?
43mm maximum clearance in standard configuration. Kingston Fury Beast DDR5-6000 (38mm), G.Skill Trident Z5 Neo (44mm — tight fit), and most low-profile DDR5 kits clear it. The G.Skill Trident Z5 RGB with full-height fins (~51mm) will not fit in slot A2 closest to the cooler without moving the inner fan up one position.
The Bottom Line
The DeepCool AK620 is the right answer for the vast majority of gaming and productivity builds. At ~$65 it cools within 2°C of the Noctua NH-D15 G2 on anything up to 200W sustained — that covers Ryzen 7 9800X3D, Ryzen 5 9600X, Core Ultra 7 265K, and most other current-gen mainstream chips. The 2024 revision’s LGA1851 support means it’s current for Arrow Lake builds. If you want the all-black aesthetic, the AK620 Zero Dark at $60 is identical hardware. If you’re on a tight budget, the Thermalright Peerless Assassin 120 SE V2 at $35 delivers surprisingly close performance for half the price. The Noctua NH-D15 G2 is the choice only if you’re pushing a high-TDP chip past 230W or need more than 43mm of RAM clearance — otherwise the AK620 saves you $114 for 2°C of temperature difference that won’t impact gaming framerates at all.