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[nextpage title=”Introduction”]

The CNPS7X LED is a CPU cooler from Zalman with two heatsinks in “V” configuration, three U-shape heatpipes and a 92 mm fan. Check it out!

The portrayed cooler looks like a “little brother” of the CNPS11X Extreme, which we already reviewed, as both have twin heatsinks in “V” configuration.

The CNPS7X LED comes in a cardboard box, as you can see in Figure 1.

Figure 1: Package

Figure 2 shows what the box contains: The cooler itself, manual, installation hardware, a small bag of thermal compound, and a power adapter.

Figure 2: Accessories

This cooler is discussed in detail in the following pages.

[nextpage title=”The Zalman CNPS7X LED”]

Figure 3 reveals the front side of the cooler, where you see the 92 mm fan, which has blue LEDs.

Figure 3: Front view

Figure 4 presents the side of the cooler.

Figure 4: Side view

Figure 5 shows the back of the cooler. Notice that the heatsinks are connected, and the center of the rear side is closed, forcing the air to pass through the side heatsinks.

Figure 5: Rear view

The top of the cooler is shown in Figure 6.

Figure 6: Top view

[nextpage title=”The Zalman CNPS7X LED (Cont’d)”]

Figure 7 shows the base of the cooler. The three heatpipes keep direct contact to the CPU. The base surface is not polished enough for a mirror-like look.

Figure 7: Base

In Figure 8, you can see the heatsink without the fan.

Figure 8: Without the fan

The 92 mm fan is shown in Figure 9. It has a four-pin connector, which means it is compatible with PWM speed control.

Figure 9: Fan

[nextpage title=”Installation”]

Figure 10 shows the frames used to install the CNPS7X LED. The left one fits socket LGA1366 motherboard, while the right frame is intended to be used on sockets 775, 1155, and 1156 systems. You can also see the small bag of thermal compound and a power adapter which can be used to reduce the maximum fan speed.

Figure 10: Frames, thermal compound and power adapter

Figure 11 illustrates the frame installed on our motherboard. On AMD processors, there is no need to install a frame because the clips at the base of the cooler are hooked on the stock motherboard frame.

Figure 11: Holding system installed

In Figure 12, you can see the cooler installed on your computer. Notice we had to install the cooler in an orientation that differs from the position we usually install the coolers we review, since in the other position, the screw that holds the cooler was blocked by the motherboard chipset heatsink.

Figure 12: Installed in our system

[nextpage title=”How We Tested”]

We tested the cooler with a Core i7-860 CPU (quad-core, 2.8 GHz), which is a socket LGA1156 processor with a 95 W TDP (Thermal Design Power). In order to get higher thermal dissipation, we overclocked it to 3.3 GHz (150 MHz base clock and 22x multiplier), keeping the standard core voltage (Vcore), which was the maximum stable overclock we could make with the stock cooler. Keep in mind that we could have raised the CPU clock more, but to include the stock cooler in our comparison, we needed to use this moderate overclock.

We measured noise and temperature with the CPU idle and under full load. In order to get 100% CPU usage in all threads, we ran Prime 95 25.11 with the "In-place Large FFTs" option. (In this version, the software uses all available threads.)

We compared the tested cooler to the Intel stock cooler with a copper base (included with the CPU), as well as with other coolers. Note that in the past, we tested coolers with a socket LGA775 CPU, and we retested some "old" coolers with this new methodology. This means you can find different values in older reviews than the values you will read in the next page. Every cooler was tested with the thermal compound that accompanies it.

Room temperature measurements were taken with a digital thermometer. The core temperature was read with the SpeedFan program (available from the CPU thermal sensors), using an arithmetic average of the core temperature readings. During the tests, the left panel of the case was open.

The sound pressure level (SPL) was measured with a digital noise meter, with its sensor placed 4" (10 cm) from the fan. We turned off the case and video board cooler fans so they wouldn’t interfere with the results. This measurement is only for comparison purposes, because a precise SPL measurement needs to be made inside an acoustically insulated room with no oth
er noise sources, which isn’t the case here.

Hardware Configuration

• Processor: Core i7-860
• Motherboard: Gigabyte P55A-UD6
• Memory: 2 GB Markvision (DDR3-1333/PC3-10700 with 9-9-9-22 timings), configured at 1,200 MHz
• Hard disk: Seagate Barracuda XT 2 TB
• Video card: Zotac GeForce GTS 250
• Video resolution: 1680×1050
• Video monitor: Samsung Syncmaster 2232BW Plus
• Power supply: Seventeam ST-550P-AM
• Case: 3RSystem L-1100 T.REX Cool

Operating System Configuration

• Windows 7 Home Premium 64 bit

Software Used

• Prime95
• SpeedFan

Error Margin

We adopted a 2 °C error margin, meaning temperature differences below 2 °C are considered irrelevant.

[nextpage title=”Our Tests”]

The table below presents the results of our measurements. We repeated the same test on all coolers listed below. Each measurement was taken with the CPU at idle and at full load. In the models with a fan supporting PWM, the motherboard controlled the fan speed according to core load and temperature. On coolers with an integrated fan controller, the fan was set at the minimum speed on the idle test and at full speed on the full load test.

		Idle Processor			Processor at Full Load
Cooler	Room Temp.	Noise	Speed	Core Temp.	Noise	Speed	Core Temp.
Intel stock (socket LGA1156)	14 °C	44 dBA	1700 rpm	46 °C	54 dBA	2500 rpm	90 °C
Cooler Master Hyper TX3 G1	14 °C	47 dBA	2050 rpm	33 °C	56 dBA	2900 rpm	62 °C
Zalman CNPS10X Extreme	14 °C	45 dBA	1400 rpm	27 °C	53 dBA	1950 rpm	51 °C
Thermaltake Silent 1156	14 °C	44 dBA	1200 rpm	38 °C	49 dBA	1750 rpm	69 °C
Noctua NH-D14	14 °C	49 dBA	1250 rpm	27 °C	49 dBA	1250 rpm	53 °C
Zalman CNPS10X Performa	14 °C	46 dBA	1500 rpm	28 °C	52 dBA	1950 rpm	54 °C
Prolimatech Megahalems	14 °C	40 dBA	750 rpm	27 °C	60 dBA	2550 rpm	50 °C
Thermaltake Frio	14 °C	46 dBA	1450 rpm	27 °C	60 dBA	2500 rpm	50 °C
Prolimatech Samuel 17	14 °C	40 dBA	750 rpm	40 °C	60 dBA	2550 rpm	63 °C
Zalman CNPS8000A	18 °C	43 dBA	1400 rpm	39 °C	54 dBA	2500 rpm	70 °C
Spire TherMax Eclipse II	14 °C	55 dBA	2200 rpm	28 °C	55 dBA	2200 rpm	53 °C
Scythe Ninja3	17 °C	39 dBA	700 rpm	32 °C	55 dBA	1800 rpm	57 °C
Corsair A50	18 °C	52 dBA	1900 rpm	33 °C	52 dBA	1900 rpm	60 °C
Thermaltake Jing	18 °C	44 dBA	850 rpm	34 °C	49 dBA	1300 rpm	60 °C< /td>
GlacialTech Alaska	18 °C	43 dBA	1150 rpm	36 °C	51 dBA	1600 rpm	60 °C
Deepcool Gamer Storm	18 °C	43 dBA	1100 rpm	35 °C	48 dBA	1600 rpm	62 °C
Corsair A70	26 °C	56 dBA	1900 rpm	40 °C	56 dBA	1900 rpm	65 °C
Deepcool Ice Blade Pro	23 °C	45 dBA	1200 rpm	38 °C	52 dBA	1500 rpm	64 °C
AC Freezer 7 Pro Rev. 2	23 °C	47 dBA	1750 rpm	44 °C	51 dBA	2100 rpm	77 °C
Corsair H70	27 °C	60 dBA	1900 rpm	37 °C	60 dBA	1900 rpm	61 °C
Zalman CNPS9900 Max	27 °C	55 dBA	1600 rpm	38 °C	58 dBA	1750 rpm	63 °C
Arctic Cooling Freezer 11 LP	25 °C	45 dBA	1700 rpm	51 °C	49 dBA	1950 rpm	91 °C
CoolIT Vantage	26 °C	60 dBA	2500 rpm	37 °C	60 dBA	2500 rpm	62 °C
Deepcool Ice Matrix 600	25 °C	46 dBA	1100 rpm	41 °C	53 dBA	1300 rpm	69 °C
Titan Hati	26 °C	46 dBA	1500 rpm	40 °C	57 dBA	2450 rpm	68 °C
Arctic Cooling Freezer 13	27 °C	49 dBA	1950 rpm	41 °C	53 dBA	2300 rpm	70 °C
Noctua NH-C14	26 °C	52 dBA	1300 rpm	37 °C	52 dBA	1300 rpm	61 °C
Intel XTS100H	26 °C	49 dBA	1200 rpm	42 °C	64 dBA	2600 rpm	68 °C
Zalman CNPS5X SZ	23 °C	52 dBA	2250 rpm	38 °C	57 dBA	2950 rpm	69 °C
Thermaltake SlimX3	21 °C	50 dBA	2700 rpm	46 °C	50 dBA	2750 rpm	99 °C
Cooler Master Hyper 101	21 °C	50 dBA	2600 rpm	38 °C	57 dBA	3300 rpm	71 °C
Antec Kühler H2O 620	19 °C	52 dBA	1400 rpm	34 °C	55 dBA	1400 rpm	58 °C
Arctic Cooling Freezer 13 Pro	20 °C	46 dBA	1100 rpm	36 °C	49 dBA	1300 rpm	62 °C
GlacialTech Siberia	22 °C	49 dBA	1400 rpm	34 °C	49 dBA	1400 rpm	61 °C
Evercool Transformer 3	18 °C	46 dBA	1800 rpm	33 °C	51 dBA	2250 rpm	65 °C
Zalman CNPS11X Extreme	20 °C	51 dBA	1850 rpm	34 °C	56 dBA	2050 rpm	61 °C
Thermaltake Frio OCK	15 °C	44 dBA	1000 rpm	27 °C	64 dBA	2200 rpm	51 °C
Prolimatech Genesis	18 °C	49 dBA	1050 rpm	30 °C	49 dBA	1050 rpm	54 °C
Arctic Cooling Freezer XTREME Rev. 2	15 °C	41 dBA	1050 rpm	32 °C	44 dBA	1400 rpm	60 °C
NZXT HAVIK 140	16 °C	48 dBA	1250 rpm	29 °C	49 dBA	1250 rpm	55 °C
Antec Kühler H2O 920	18 °C	41 dBA	650 rpm	29 °C	64 dBA	2500 rpm	49 °C
Zalman CNP7X LED	18 °C	45 dBA	1950 rpm	33 °C	48 dBA	2150 rpm	58 °C

In the graph below, at full load you can see how many degrees Celsius hotter the CPU core is than the air outside the case. The lower this difference, the better is the performance of the cooler.

 

[nextpage title=”Main Specifications”]

The main specifications for the Zalman CNPS7X LED CPU cooler include:

• Application: Sockets 775, 1155, 1156, 1366, AM2, AM2+, and AM3 processors
• Dimensions: 5.0 x 3.5 x 5.3 inches (127 x 90 x 135 mm) (W x L x H)
• Fins: Aluminum
• Base: Aluminum, with heatpipes directly touching the CPU
• Heat-pipes: Three copper heat-pipes
• Fan: 92 mm
• Nominal fan speed: 1950 rpm
• Fan air flow: Not informed
• Maximum power consumption: Not informed
• Nominal noise level: 25 dBA
• Weight: 12.7 lbs (360 g)
• More information: https://www.zalman.com
• Average Price in the US*: USD 45.00

* Researched at Newegg.com on the day we published this review.

[nextpage title=”Conclusions”]

Zalman successfully combined small size, low noise, and high cooling performance in the CNPS7X LED CPU cooler.

The CNPS7X LED is also easy to install, but keep in mind that the large clip at the base of the cooler can be a problem with motherboards where the chipset heatsink is too close to the CPU socket.

With high cooling performance, silence, and relatively low price tag, the Zalman CNPS7X LED receives the Hardware Secrets Silver Award.