FrostyTech Mk.II Synthetic Thermal Heatsink Test Results AMD Athlon64 / FX / X2, Phenom & Sempron class heatsinks Results based on readings from a 38x38mm copper interface die with 125W heat load on the K8 version of the Mk.II Test Platform. Temperature results listed for each heatsink were calculated by determining the rise over ambient temperatures at time of test. Information on Frostytech's test methodology is available here. Socket 939/940/754 & AM2+ compatible CPU heatsinks
manufacturer:	model no.:	*fan speed:	125w thermal test (°c)	noise level (dba)
Thermalright	Ultra-120		12.4	53.7
Sunbeamtech	Core-Contact Freezer	high	13.2	51.3
SilenX	iXtrema IXC-120HA2	high	14.1	52.9
Xigmatek	HDT-S1283	high	14.2	50.7
Xigmatek	HDT-S1284EE	high	14.4	44.2
Coolermaster	Hyper Z600		15.1	47.7
Coolink	Silentator	high	15.2	41.2
Scythe	Mugen		15.3	46.0
Zerotherm	FZ120	high	15.5	47.6
Thermalright	Ultra 120 Extreme		15.5	44.5
OCZ	Vendetta 2	high	15.7	41.9
Xigmatek	HDT-S983	high	15.9	52.7
Xigmatek	S1284 Achilles	high	16.0	42.7
3Rsystem	Iceage 120	high	16.1	47.9
Xigmatek	HDT-SD964	high	16.3	57.2
Zalman	CNPS9700 LED	high	16.5	56.5
Zalman	CNPS9700NT	high	16.6	52.2
Scythe	Infinity SCINF-1000		16.7	37.8
Tuniq	Tower 120	high	16.9	51.6
Ibuypower	IBP-Z001	high	16.9	61.7
Nexus	HOC-9000	high	17.0	43.0
AVC	Z7U7414001 (stock AM2)	high	17.0	63.0
Coolermaster	Hyper 212		17.2	45.9
Noctua	NH-U12P	high	17.3	40.7
Noctua	NH-U12		17.5	45.4
Gigabyte	GH-PCU23-VE	high	17.5	65.6
Thermaltake	V1	high	17.6	59.6
Thermaltake	MaxOrb	high	17.7	57.4
Thermalright	Ultra-90	high	18.2	56.2
Coolermaster	GeminII S	high	18.3	49.6
OCZ	Vendetta	high	18.4	52.8
Gigabyte	G-Power Pro	high	18.6	71.9
Enzotech	Ultra-X	high	18.7	59.1
Noctua	NH-U9		18.8	58.4
Noctua	NH-C12P	high	19.2	40.4
Zalman	CNPS8700 LED	high	19.5	48.1
Evercool	Buffalo HPEA-10025		19.5	50.2
Apack	Zerotherm BTF92 OC Ed	high	19.7	53.6
Cooljag	Falcon 92-AL	high	19.8	52.1
Akasa	AK-876	high	20.0	48.2
Xigmatek	HDT-S963	high	20.1	50.2
Akasa	AK-920	high	20.2	52.9
Scythe	Mine Rev.B		20.4	36.8
Cooljag	Falcon 92-Cu	high	20.4	52.8
Apack	Zerotherm Nirvana 120	high	20.5	49.2
Apack	Zerotherm BTF90		20.5	52.1
Coolermaster	Hyper6	high	20.5	54.7
Asus	Arctic Square	high	20.9	38.3
Apack	Zerotherm BTF80		21.3	51.9
Scythe	Andy Samuri Master SCASM-1000		21.5	38.4
Asus	Silent Knight 2	high	21.7	46.2
Asus	Silent Square EVO	high	21.7	42.8
Thermaltake	Venus 12	high	21.7	68.1
Glacialtech	Igloo 5750 PWM	high	21.9	52.3
Thermalright	SI-128SE		22.0	44.5
Cooljag	SFO-Q	high	22.2	60.6
Zalman	CNPS9300AT	high	22.5	55.5
ASUS	Triton 77	high	22.7	41.2
Noctua	NH-U9B	high	22.8	41.9
ASUS	Starice	high	22.8	67.4
Zalman	CNPS9500 AM2	high	23.0	53.2
Asus	Lionsquare	high	23.1	44.7
Arctic Cooling	Freezer 64 Pro		23.2	50.9
Coolermaster	Aquagate Mini R80	high	23.2	59.2
Scythe	Zipang		23.3	33.1
Thermaltake	Polo 735	high	23.4	68.0
Asus	Triton 79 Amazing		23.5	44.3
Cooljag	SFO-H	high	23.6	60.6
Alpha	PAL-8150		23.7	58.9
Zalman	CNPS9500 LED	high	23.8	50.3
Verax	Helado		24.3	36.3
Glacialtech	Igloo 5710 Silent		24.4	43.4
Auras	SLC-747	high	24.6	52.2
AVC	Z7U3301001 (stock 939)	high	24.6	59.9
Zalman	CNPS8000	high	24.8	57.4
Gigabyte	3D Cooler-Ultra	high	24.8	63.0
Zalman	CNPS7500-Cu LED	high	25.0	50.9
Scythe	Kama Cross		25.1	40.0
Thermaltake	DuOrb		25.6	49.5
nPowertek	TTIC NPH1000		25.8	47.5
Glacialtech	Igloo 5750 Silent		26.0	35.5
OCZ	Tempest		26.0	51.6
Scythe	Shogun	high	26.0	45.9
Scythe	Orochi SCORC-1000		26.2	27.8
Coolermaster	Hyper TX2		26.3	53.7
Rosewill	RCX-Z2-EX	high	26.3	45.9
EKL	V8	high	26.3	57.5
Rosewill	RCX-Z3	high	26.5	58.6
Auras	CTC-868 (closed)		26.6	48.7
Thermalfly	F1-IACSHA	high	26.6	60.4
Zalman	FS-C77		26.7	56.5
Gigabyte	3D Rocket-Pro	high	26.9	56.7
Zalman	CNPS7700-Cu	high	27.0	50.7
Gigabyte	3D Cooler-Pro	high	27.0	62.5
nPowerTek	NPH-Big K8		27.8	54.0
Auras	LPT-709		27.9	43.9
Akasa	AK-922 (EVObue)	high	27.9	60.3
Zalman	CNPS7700-Cu LED	high	28.1	49.8
Akasa	AK-873	high	28.2	59.2
Scythe	Katana II		28.3	37.9
Spire	SP601B3		28.3	48.9
Scythe	Ninja Mini		28.5	41.7
Ajigo	MF064-074	high	28.8	60.3
Gigabyte	3D-Rocket		28.9	50.7
Vantec	Mach1	high	29.2	56.9
Gigabyte	Volar GH-PSV21-FB	high	29.4	56.1
Thermalright	SLK-948U		29.4	58.8
CoolJag	SFO-D(18SC)		29.6	64.0
Akasa	Revo (horizontal)	high	30.1	44.5
Antazone	AS-C1000		30.2	57.6
Arctic Cooling	Alpine 64		30.5	43.9
Zalman	CNPS7000A-Cu	high	30.3	45.2
Dynatron	SK-V24		30.3	56.4
Verax	Quattro 1	high	30.7	55.4
Xigmatek	AIO-S80DP	high	30.7	55.0
Zalman	CNPS7000-Cu	high	31.0	45.2
Coolermaster	Hyper48		31.7	43.6
Rosewill	RCX-Z1	high	31.9	54.1
Scythe	Kama SCKK1000		31.9	47.5
Scythe	Shuriken	high	32.0	38.2
Scythe	Samurai SCSM1000	high	32.1	51.6
Zalman	CNPS7000B-CU	high	32.3	44.9
Thermaltake	Silentboost K8		32.3	49.7
Jetart	JAX801		33.2	53.5
Dynatron	A22		34.5	44.5
nPowertek	NPH K8-1		34.6	52.2
Ajigo	MF043-044 (stock 754)		35.0	45.4
Glacialtech	Igloo 7321 Silent E		35.7	41.0
Arctic Cooling	Silencer 64 Ultra TC		37.5	55.5
Gigabyte	NeonCooler 8-BL		37.7	42.0
Spire	Fourier IV SP607B3-C		38.4	60.2
Asus	Triton 75		38.6	49.6
Glacialtech	Igloo 7312 Silent E		38.7	41.1
Titan	TTC-K8ATB/825/SC		38.7	63.1
Glacialtech	Igloo 7311 Silent		39.4	36.5
Akasa	AK-860SF		39.4	45.2
Asus	Triton 85	high	41.5	41.1
Evercool	K802-715		42.1	51.5
Spire	SP741B3		43.2	45.6
Arctic Cooling	Freezer 64 LP		45.3	42.6
Glacialtech	Igloo 7223 Light E		45.5	42.3
Glacialtech	Igloo 7222 Light		46.6	37.7
Evercool	Magic Cooler		46.6	55.5
			125w thermal test (°c)	noise level (dba)
*heatsinks are ranked according to the 125w thermal test results column (rise over ambient temp.). low temperatures with low noise levels are considered best. for reference heatsinks with variable-speed fans, only the high speed (12v) fan test result is included in the comparison sheet; more detailed results reside in each specific heatsink review.

with a 125w heat load applied by the amd k8 version of the frostytech synthetic thermal test platform, the Glacialtech Igloo 7321 Silent E heatsink yields a satisfactory result of 35.7°C over ambient, with 41.0 dBA noise. To be fair, we have to reiterate that the heatsink is being stressed beyond its stated maximum wattage support of 89W.

However, as Frostytech uses a 125W test for all AMD K8 heatsinks, you'll have to infer how the Igloo 7321 Silent E would handle with a reduced thermal load.

Priced at less than $20 bucks, the Glacialtech Igloo 7321 Silent E heatsink will be satisfactory for 85W or 65W AMD processors, particularly in situations where there is limited vertical clearance. It should even be satisfactory with 125W CPUs, provided the case has very good ventilation. Ultimately the Igloo 7321 Silent E is a plain and simple no frills CPU cooler for energy efficient AMD sub-89W processors.

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