Purchased the new ID Cooling IS-47-XT CPU cooler as I keep looking for the ideal CPU air cooler to fit in my modified, no longer in production, 6.7 liter 678 case. The cooler is symmetrical, uses the AMD back-plate, allows unrestricted access to the upper NVMe drive, and includes two sets of AMD mounting bars to allow the cooler to be rotated in 90 degree increments. Yes – thank you very much. I had earlier fitted the Noctua L9A cooler but it uses its own mounting back-plate, and can only be mounted on my Aorus B550 ITX motherboard with its fins up against the back to the rear IO heat heat sink cover and towards the RAM on the opposite side. The IS-47-XT cooler has folded ends on two sides of the cooler to channel the air flow down the length of the cooling fins. I was hoping for a good match for the Ryzen 7 5700X with its maximum wattage draw under 80 watts, despite its 30 watt idle draw. A RTX A2000 6GB GPU was installed to complete this low wattage build.
This cooler appears nearly identical in design to the Alpenfoehn Panorama 2 CPU cooler with the exception of the heat pipes on the Panorama 2 all enter from one side instead of being split into pairs on two sides of the cooler. Think of this cooler as a cut down Noctua L9x65 cooler. The Panorama 2 is not currently available in the USA.
My only additional wish would be that ID Cooling include a set of longer fan mounting screws for a 92x25mm thick fan as I intended to use the Noctua A9x25 fan with its max 2000 RPM and lower noise profile in operation than any of the slim 2500 RPM 92mm fans. I used the longer screws included with the ID Cooling IS-55 CPU cooler for mounting the thicker Noctua fan..
One observation when mounting the cooler: The cold plate of the cooler will make contact with the top surface of the CPU before the two mounting screws. The springs around these screws are holding the screws slightly away from the mounting posts. Just a bit of additional pressure will have the screws threading into the posts to tighten the cooler down. This is the opposite of the other coolers I have mounted where the screws contact the posts before the cold plate touches the CPU. This may actually be helpful when removing the cooler as this should allow the cooler to be twisted while still stuck to the surface of the CPU breaking the thermal paste seal instead of ripping the AM4 CPU out of the socket – that I have done more times than I care to admit.
I did an initial test on the open test bench using the included 15mm fan, but I obtained this cooler to use it with the Noctua A9x25 fan. I did not find the included ID Cooling 15mm fan to be obviously louder than the Noctua A9x14mm fan.
On an open test bench both CPU coolers fitted with the Noctua A9x25 fan, the IS-47-XT was about 1.5C cooler than the L9A and 1.1 dba quieter in operation. The maximum noted fan RPM using the same fan was reduced by 100 RPM on the L9A apparently due to a more restrictive air flow with this cooler/motherboard combination. The CPU fans were allowed to auto regulate in all testing – where they maxed out due to the temperatures achieved. Earlier testing using the L9A in the 678 case indicated that it could not keep the CPU from throttling without a case fan being installed.
Installed in the 678 case with the Noctua A9x25 fan, two tests using CPU-Z stress test along with Unigine Valley at 1080P Ultra settings were run – one without a case fan, and a second test with a 120x25mm Scythe Kaze Flex Black fan set as intake at a fixed 50% PWM of 920 RPM. The case fan speed was selected as the highest speed with this case/fan component combination that was noticeable, but not annoying when 55 to 60 cm from my head. Overall temperatures decreased substantially when a case fan was added. This confirmed my earlier observations regarding 92mm fan CPU coolers usually requiring a case fan for reasonable operating temperatures on other motherboard components while adding only one dba to the sound level. When installed in the case, the bottom NVMe drive has a very thick thermal pad pressing the bottom panel of the case functioning as a very large heat sink.
I am pleased with the performance of the IS-47-XT in this SFF build. As I look at this build with its modified case, I can see that it should make for an excellent SFF case fan testing platform. Will have to set up separate testing to see how my collection of 120mm fans perform.
ID Cooling IS-47-XTCPU Cooler Testing |
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Aorus B550 |
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Ryzen 7 5700X |
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RTX A2000 |
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32GB Corsair LPX 3200 |
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Noctua NTH-1 Thermal Paste |
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CPU Fan Auto |
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PC Case | Open Bench | Open Bench | 678 Case | 678 Case |
CPU Cooler | ID IS-47-XT | ID IS-47-XT | ID IS-47-XT | ID IS-47-XT |
CPU Fan | Stock 15mm | Noctua A9x25 | Noctua A9x25 | Noctua A9x25 |
Case Fan | None | None | None | Scythe KFB 120 |
TZ10 | 16.8 | 16.8 | 16.8 | 16.8 |
UAD0 | 16.8 | 16.8 | 16.8 | 16.8 |
TMPIN0 | 60 | 49 | 59 | 52 |
TMPIN1 | 46 | 46 | 57 | 49 |
TMPIN2 CPU | 65 | 64 | 76 | 68 |
TMPIN3 | 20 | 20 | 21 | 21 |
TMPIN4 | 46 | 45 | 56 | 49 |
TMPIN5 | 51 | 51 | 61 | 52 |
CPU Fan RPM | 2586 | 1928 | 2057 | 1973 |
Case Fan RPM | N/A | N/A | N/A | 50% 920 |
Pkg Temp | 78.6 | 64 | 76.9 | 68.4 |
Pkg Watt | 77.86 | 77.87 | 77.87 | 77.86 |
NVMe Top Temp | 45 | 44 | 55 | 48 |
NVMe Bottom Temp | 51 | 51 | 50 | 42 |
GPU Temp | 75 | 75 | 78 | 76 |
GPU Hotspot | 81.4 | 81.2 | 84.3 | 82.7 |
GPU Watt | 69.8 | 69.94 | 69.53 | 69.9 |
GPU Fan RPM | 48% 3882 | 47% 3850 | 51% 4049 | 49% 3970 |
30 CM dba | 44.3 | 40.5 | 42.3 | 43.2 |
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