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You are not buying cooling capacity here. You are buying silence, and those are different products. The i7-3770 is the locked, non-K Ivy Bridge chip: 77 W rated, four cores, and no multiplier to raise. It physically cannot produce enough heat to trouble a competent tower cooler, and it was never going to. What it does do is make Intel’s bundled 92 mm blower ramp up under sustained load and sit there whining, and that noise is the actual reason anyone searches for this. So the number to compare is not thermal capacity in watts — it is how big the heatsink is, because a large heatsink lets a large fan turn slowly, and a slow fan is a quiet one.
The more urgent problem in 2026 is that your socket is nearly extinct, and half the coolers on sale no longer support it. LGA1155 was Intel’s mainstream socket in 2011 and 2012. Current coolers ship with LGA1700 and AM5 hardware in the box, and many manufacturers have quietly dropped the older brackets. Before you buy anything, look for LGA115x in the compatibility list. That notation is your friend: LGA1150, 1151, 1155 and 1156 all share the same 75 mm × 75 mm mounting hole spacing, so a bracket for any one of them fits all four. A cooler listing 1150 and 1151 but not 1155 almost certainly still fits — but a cooler listing only 1700 and AM5 does not, and no amount of hoping changes that.
Where a bracket is missing, several manufacturers still sell the older mounting kits separately, sometimes cheaply and sometimes free on request. Noctua in particular has a long record of supplying legacy mounting hardware, which is worth knowing if you want a cooler that will move to your next machine.
One Ivy Bridge quirk worth understanding, so you do not chase it. Intel used thermal paste rather than solder between the die and the heat spreader on this generation, which is why these chips report higher core temperatures per watt than the Sandy Bridge parts before them. People used to prise the lid off and replace that paste. On a locked 77 W chip there is nothing to gain from it — you are not thermally limited, and a delid risks a working CPU for a temperature reading you have no use for.
Two physical checks before you order. Measure the clearance from your motherboard tray to the side panel, because a 160 mm tower will not fit in a slim case. And check the height of your RAM, since tall heatspreaders and a front-mounted 120 mm fan is the classic collision.
The list runs from quiet towers down to low-profile and budget options.
| # | Product | Price | Where to buy |
|---|---|---|---|
| 1 | Noctua NH-U12S redux | $50–$70 | Amazon · eBay |
| 2 | Thermalright Peerless Assassin 120 SE | $35–$50 | Amazon · eBay |
| 3 | Cooler Master Hyper 212 (Black Edition / EVO V2) | $25–$45 | Amazon · eBay |
| 4 | be quiet! Pure Rock 2 | $35–$50 | Amazon · eBay |
| 5 | DeepCool GAMMAXX 400 / AG400 | $20–$40 | Amazon |
| 6 | Arctic Freezer 34 eSports DUO | $35–$50 | Amazon · eBay |
| 7 | Noctua NH-L9i (low profile) | $45–$60 | Amazon · eBay |
| 8 | Thermalright AXP90-X47 | $25–$40 | Amazon · eBay |
| 9 | Arctic MX-6 Thermal Compound | $8–$14 | Amazon · eBay |
| 10 | Intel Stock LGA1155 Cooler (what you already have) | $0–$15 | Amazon · eBay |
The picks, in detail
Noctua NH-U12S redux
The sensible answer for most people: a full-height 120 mm tower that is quiet at low fan speeds, and from a manufacturer with an unusually good record of supplying mounting kits for old sockets. The redux line drops the beige-and-brown colour scheme and a little of the accessory bundle to hit a lower price, and the cooling is essentially the same. Confirm LGA115x hardware is included or request the kit.
- 120 mm single-tower heatsink
- Redux PWM fan, low noise at partial speed
- SecuFirm mounting with LGA115x support
- Around 158 mm tall
- Very quiet at the speeds a 77 W chip needs
- Noctua’s legacy bracket support is the best in the business
- Slim enough to clear most RAM
- 158 mm tall — check case width first
- Costs more than the chip is worth on the used market
- Single fan means no headroom you will ever use
Thermalright Peerless Assassin 120 SE
The value benchmark of the last few years: a dual-tower, six-heatpipe cooler with two 120 mm fans at a price that used to buy a single-tower budget unit. Vastly more heatsink than a 77 W chip requires, which is exactly the point — the fans barely have to turn. Check the current revision’s bracket list carefully, because Thermalright has revised its mounting kits several times.
- Dual-tower, six heatpipe design
- Two 120 mm PWM fans
- Around 155 mm tall
- Mounting kit varies by revision — verify LGA115x
- Enormous cooling capacity for the money
- Fans idle almost silently on a chip this size
- Excellent build for the price
- Bracket support varies between revisions — read the listing
- Dual tower overhangs the first RAM slot
- Overkill in a way that wastes case space
Cooler Master Hyper 212 (Black Edition / EVO V2)
The default recommendation for this platform since the platform was new, and still a reasonable one. Four direct-contact heatpipes, a 120 mm fan and a long history of supporting every mainstream socket, including the old ones. It is not the quietest or the most capable cooler here, but it is stocked everywhere, it is cheap, and the mounting hardware situation is well documented.
- Four direct-contact heatpipes
- 120 mm PWM fan
- Around 159 mm tall
- Long-standing LGA115x support
- Cheap, ubiquitous and well understood
- Comfortably handles a 77 W locked chip
- Plenty of second-hand units around for this era
- Direct-contact base has gaps between heatpipes
- Newer revisions have changed the bracket contents
- Stock fan is louder than the Noctua or Thermalright
be quiet! Pure Rock 2
Built by a company whose entire proposition is noise, and it shows: the fan is tuned for a low noise floor rather than a high maximum, which suits a chip that will never load it. Four heatpipes, a 120 mm fan, and a brushed aluminium top cover if that matters to you. Check the bracket list, as be quiet! has been inconsistent about older Intel sockets in recent revisions.
- Four heatpipe single tower
- 120 mm Pure Wings 2 PWM fan
- Around 155 mm tall
- Brushed aluminium top cover
- Genuinely quiet under the loads this chip generates
- Tidy appearance in a windowed case
- Reasonable price
- Verify LGA115x on the current revision before buying
- Mounting is fiddlier than Noctua’s
- Middling performance if you ever move it to a hotter chip
DeepCool GAMMAXX 400 / AG400
The long-running budget tower on this platform, and it earns a mention for one specific reason: the heatsink sits behind the RAM slots rather than over them, so tall memory is not a problem. Four heatpipes and a 120 mm fan is more than enough here. The GAMMAXX generation is the era-appropriate one and turns up used cheaply; the AG400 is the current equivalent.
- Four heatpipe tower
- 120 mm PWM fan
- Good RAM clearance by design
- LGA115x support on the GAMMAXX generation
- Excellent memory clearance
- Cheap new and very cheap used
- Simple, reliable mounting
- Check the bracket list on the newer AG400 revisions
- Stock fan is audible at higher speeds
- Plain appearance
Arctic Freezer 34 eSports DUO
A well-regarded mid-price tower with two fans in a push-pull arrangement, and Arctic’s pricing has always been aggressive. Two fans on a 77 W chip means both can run at very low RPM, which is the quietest configuration available short of passive. Arctic’s mounting kits for older Intel sockets have generally been included rather than dropped, but confirm on the listing.
- Single tower with push-pull 120 mm fans
- Four heatpipes
- Around 157 mm tall
- Offset design for RAM clearance
- Two fans run very slowly and stay inaudible
- Offset tower clears memory
- Strong price for the specification
- Two fan cables to route and split
- Bracket contents differ between versions
- Coloured fan accents are not to everyone’s taste
Noctua NH-L9i (low profile)
For a small-form-factor case where nothing tall will fit. It is 37 mm high, sits entirely within the 95 mm × 95 mm socket keep-out area so it never touches RAM or the first slot, and it is rated for exactly this class of chip. It will run warmer than a tower — that is the trade for the height — but on a locked 77 W part it stays comfortably in range.
- 37 mm total height
- 92 mm slim NF-A9x14 fan
- Fits entirely within the socket area
- LGA115x specific version
- Fits cases where no tower will
- Zero RAM or slot interference
- Excellent fan for its size
- Runs noticeably warmer than any tower here
- Small fan has to spin faster to compensate
- Expensive for its size
Thermalright AXP90-X47
The budget low-profile alternative, at 47 mm tall with a 92 mm fan and four heatpipes — more heatsink than the NH-L9i in a slightly taller package, for roughly half the money. Worth checking against your case’s CPU cooler clearance figure, because those ten extra millimetres decide it. Confirm the mounting kit includes the older Intel bracket.
- 47 mm height
- Four heatpipes with a 92 mm slim fan
- Copper base
- Mounting kit varies — verify LGA115x
- More cooling than most low-profile units
- Much cheaper than the Noctua equivalent
- Compact footprint
- Ten millimetres taller than the NH-L9i, which matters in SFF
- Bracket support needs checking per revision
- Small fan is audible at full speed
Arctic MX-6 Thermal Compound
The cheapest meaningful upgrade available to this machine, and the one most people skip. Thermal paste applied in 2012 has had a decade and more to dry out, and a hardened layer is worth a genuinely noticeable number of degrees. Whether you fit a new cooler or reseat the old one, replace the paste. A four-gram tube costs less than a takeaway and does several machines.
- Non-conductive thermal compound
- Sold in 2 g, 4 g and 8 g tubes
- No cure time required
- Long rated service life
- Very cheap for a real temperature improvement on an old build
- Non-conductive, so a spill is not a disaster
- One tube covers several rebuilds
- Requires removing the cooler, which means a full reseat
- Old paste can be stubborn to clean off the heat spreader
- Improvement is invisible if the original paste was still fine
Intel Stock LGA1155 Cooler (what you already have)
Listed honestly because for a lot of readers the right answer is to keep it. The bundled 92 mm cooler handles a locked 77 W chip perfectly well on temperature — it simply gets loud doing it, and the push-pin mounting is notorious for not seating properly. Before spending anything, pull the board, check all four pins are locked through from the back, and replace the paste. That fixes a surprising proportion of complaints.
- 92 mm fan on an aluminium extrusion
- Push-pin mounting
- Pre-applied thermal pad from factory
- Bundled with retail boxed CPUs
- Free, and already in the machine
- Thermally adequate for a locked 77 W chip
- Zero clearance concerns
- Noisy under sustained load, which is why people replace it
- Push-pins frequently sit unlocked without anyone noticing
- Factory thermal pad is long dried out by now
Buying tips
- Search for LGA115x in the compatibility list, not LGA1155. The 1150, 1151, 1155 and 1156 sockets share the same 75 mm mounting holes, so a bracket for any one of them fits your board.
- Buy for noise, not for capacity. A locked 77 W chip cannot stress any tower cooler, so the useful question is how slowly a large fan can turn — not how many watts the heatsink is rated for.
- Ask the manufacturer for a legacy mounting kit if one is missing. Several still supply older Intel brackets separately, sometimes free, and that can rescue an otherwise incompatible cooler.
- Replace the thermal paste whatever you decide. Compound applied when this machine was new has had over a decade to dry, and fresh paste is the cheapest real improvement available to it.
- Check the stock cooler’s push-pins before buying anything. All four have to click through the board and lock; one unseated pin produces exactly the temperatures that send people shopping.
- Measure your case width and your RAM height before ordering. A 155-160 mm tower and tall memory heatspreaders are the two clearance problems that cause returns.
- Do not delid an Ivy Bridge chip. The paste under the heat spreader is why these read hot per watt, but on a locked 77 W part you gain nothing and risk a working CPU.
- Consider whether the money is better spent elsewhere. A quiet cooler on this platform costs a good fraction of what the whole system is worth used — a case fan swap and fresh paste may get you most of the quiet for a tenth of the price.
As an Amazon Associate and eBay Partner, toptenpick.com earns from qualifying purchases. Prices and availability are subject to change.