The Phanteks Eclipse G370A is no-frills high-airflow PC case that is targeted at both everyday consumers and professionals alike, where it has great thermal performance and supports SSI-EEB and EATX motherboards.

First showcased at Computex 2025, the Phanteks Eclipse G370A is a new no-frills mid-tower PC case that comes with a high-airflow design and support for SSI-EEB and EATX motherboards, making it a PC case to consider if you're looking to build a high-performance PC without having to splash out big bucks on a pricey PC case.

Equipped with three preinstalled 120mm Phanteks M25 case fans on the front, the Eclipse G370A is available in black, and comes with a price tag of around US$59 from online e-commerce sites such as Newegg (as of the time of publishing this review). Read on to learn more about the Eclipse G370A, and whether it might be worth your money if you're looking for a mid-tower PC case that simply gets the job done!

Summary of Specifications (PH-EC370A_DBK01)

• Colour: Black
• Materials: Steel, ABS plastic, tempered glass
• Dimensions: 465mm x 476mm x 220mm
• Motherboard Support: SSI-EEB, EATX, ATX, Micro ATX, Mini ITX
• Expansion Slots: 7
  
• Drive Support: up to 2x 2.5" SSDs on rear of motherboard tray and 1x 3.5" hard drive in bottom chamber
• Front I/O: 1x 3.5mm microphone/headphone combo jack, 1x USB 3.0 Type-C, 1x USB 3.0 Type-A, reset button, power button
• Included Fans: 3x Phanteks M25 D-RGB 120mm front-mounted case fans
• Top Panel Cooling Support: up to 3x 120mm fans or 1x 360mm AIO radiator (radiator max dimensions 400mm x 120mm x 60mm)
• Front Panel Cooling Support: up to 3x 120mm fans, or 1x 240mm AIO radiator (top mounted 360mm AIO radiator will not be supported with a front 240mm AIO radiator installed)
• Side Panel Cooling Support: N/A
• Bottom Panel Cooling Support: N/A
• Rear Panel Cooling Support; up to 1x 120mm fan
• Official Product Page: https://phanteks.com/product/eclipse-g370a-black/

Packaging & Accessories

The Phanteks Eclipse G370A comes shipped in a brown cardboard box with your usual product illustrations and descriptions on all sides.

In terms of accessories, the G370A comes with a plastic bag of accessories that’s secured to the motherboard tray with a cable tie. Within the bag, we get an instruction manual, a RMA information leaflet, a bunch of cable ties, two PCIe expansion slot covers, a GPU support bracket, a pack of screws and rubber spacers for 3.5” hard disk mounting purposes, and another pack of screws that also includes a tool that allows you to use a Philips head screwdriver to install and remove motherboard standoffs with ease.

Exterior Walkthrough

With the case out of the box, it's apparent that Phanteks has gone with a no-nonsense aesthetic for the Eclipse G370A, where we get a front panel with a full-mesh construction for airflow purposes, a tempered glass side panel on the left to showcase the insides of your PC build, and a simple steel panel with no ventilation openings on the right.

The front panel buttons and connectors of the case are located on the top panel, where we get a power button that is illuminated in white when the PC is powered on, a reset button, a USB 3.0 Type-A port, a USB 3.0 Type-C port and a 3.5mm headphone/microphone combo jack.

While we’re still on the top panel of the case, we get openings for three 120mm case fans or up to a 360mm AIO radiator. We do also get a removable dust filter that’s held in place magnetically.

Over on the bottom panel of the G370A, we get ventilation openings for the power supply unit’s cooling fan, where Phanteks has also included a removable dust filter that slides in and out of place. As can be seen, the case comes with four plastic feet with foam-like inserts.

The rear of the case is a pretty standard affair, where the expansion slot openings have single-use punch-outs that you’ll have to break off before installing your expansion cards. To secure your expansion cards to the case, you’ll have to pop off the long plastic cover as pictured above.

Getting the panels off the Eclipse G370A is as straightforward as it gets, all thanks to its tool-less design; for the front and side panels, you can simply pry them off without the need for any tools, where these three panels are held in place by friction posts.

As mentioned earlier, the dust filter of the top panel is held in place by magnetic strips...

...while the dust filter on the bottom panel for the power supply unit’s cooling fan slides in and out of place easily for removal and installation.

Cooling Hardware Support

Kicking things off in the cooling department is the fact that the Eclipse G370A comes with three preinstalled M25 120mm D-RGB case fans over on the front panel.

If you’d like, you can replace these fans with other brands and models of 120mm case fans, or install up to a 240mm AIO radiator. Do note that when you’ve got a 240mm radiator installed behind the front panel, you won’t be able to install a 360mm AIO radiator on the top panel of the case!

Over on the top panel of the case, we get ventilation openings that support up to three 120mm fans or a 360mm AIO radiator of size no more than 400mm x 120mm x 60mm.

Finally, over on the rear panel, Phantek’s included a single opening that supports a 120mm fan.

Physical Dimensions & Clearances

In terms of physical dimensions, the Eclipse G370A is not overly large for a PC case that supports EATX motherboards, where it measures in at 465mm x 476mm x 220mm. A feature that’s clearly targeted at the workstation PC crowd is the fact that this case also has support for even larger server and workstation motherboards that comply with the SSI-EEB standard.

If you're intending to use an air cooler for your processor, do note that the case supports CPU coolers of heights no more than 170mm according to Phanteks.

For your GPU, the case supports horizontal GPU mounting only, and comes with support for graphics cards with lengths of up to 375mm – this figure is for when you have intake fans mounted on the front panel.

We’ve also got width clearance of up to 170mm for your graphics card, and if you’d like, you can install the included GPU support bracket that can be mounted on the motherboard tray, where it's held in place by two screws and is also adjustable for height.

Do note that with an EATX or larger motherboard installed, you won’t be able to install the GPU support bracket, as the bracket mount on the motherboard tray (pictured above) would be obscured by EATX or SSI-EEB form-factored motherboards.

While we're still on the topic of GPU clearances, I'd advise against using this case with graphics cards that come equipped with very tall coolers, and I mean REALLY tall coolers that are the exception rather than a norm, such as the Gigabyte AORUS GeForce RTX 4090 MASTER 24G that I have on hand, which I can safely say is one of the largest graphics cards available on the market - it measures in at whopping 358.5mm x 162.8mm x 75.1mm.

Due to its width of 162.8mm, I was unable to get the RTX 4090 MASTER into the case despite its purported 170mm of width clearance, as the card's cooler shroud couldn't clear the G370A's frame right above the PCIe expansion slot cover area, so as to get the card properly inserted into the motherboard's PCIe slot. I must say that this is a fringe-type kind of situation, seeing as mainstream and even high-end RTX 5090 and RTX 4090 cards tend to have widths of around 140mm to 150mm – flagship cards with widths more than 150mm tend to be really few and far between. Just something to note in case you’re thinking of using a really wide GPU with this case!

Regarding the motherboard tray, do note that the G370A doesn’t come with support for back-connect motherboards, so you’ll have to make do with standard motherboards with connectors on the front.

In terms of power supply dimensions, Phanteks indicates that the Eclipse G370A has 200mm of length clearance for a power supply, which is mounted in the bottom chamber of the PC case.

Storage Drive Support

For those of you intending to install 2.5” and 3.5” drives for your PC build with the G370A, Phanteks has included a drive bracket on the rear of the motherboard tray that supports up to two 2.5” SSDs.

Seeing as this case is likely targeted at the workstation crowd given its support for SSI-EEB motherboards, having support for more than one 3.5" hard drive would have been a welcome feature for sure, but owing to the tight confines of the bottom chamber, end-users of this case would have to contend with a single 3.5" hard disk drive courtesy of a mounting location right next to the power supply unit.

Building a PC with the Phanteks Eclipse G370A

The front panel connectors of the case are a pretty straightforward affair, where we get a front panel USB 3.0 connector (do note that the front USB 3.0 Type-A and Type-C ports share this same connector), a front panel audio connector as well as an nine-pin front panel connector for the power switch, reset and power LEDs.

For the front panel power switch, power LED and reset button, I appreciate the fact that Phanteks has opted to use an integrated nine-pin connector rather than standalone connectors, which can be more fiddly to hook up to their respective header pins on the motherboard.

The case comes with three preinstalled Phanteks M25 case fans over on the front panel, and we’ve got the corresponding four-pin fan connector and ARGB connector for these fans – do note that you can daisy-chain the included fans to additional Phanteks case fans where needed using the three=pin ARGB connector pictured above.

Getting an EATX motherboard, a Gigabyte X670E AORUS MASTER, into the case for a demo build was pretty easy, where the motherboard standoffs are already pre-installed on the motherboard tray and we get ample space for manoeuvring things around. 

With an EATX form factor motherboard in place, the cable routing openings on the motherboard tray as pictured above are easily accessible and located in strategic positions for you to cable manage and get your cables to their respective positions. Naturally, if you’ve got a bigger motherboard in place, say a SSI-EEB server board that’s larger than EATX, these openings would be obscured for sure.

Installing the power supply unit was a cinch too, just make sure that you’ve got a PSU that’s no more than 200mm in length and you’re good to go. You’ll want to note to route the front panel cables through the bottom openings (bordering the motherboard tray) to the motherboard only after you’ve installed the PSU, as there might not be enough clearance for you to get the PSU properly inserted into the bottom chamber if you route cables through the said openings first.

For this demo build, I’ll be installing a three-pack of Phanteks M25 G2 120mm case fans as exhaust fans on the top panel of the case, and another standalone M25 G2 fan as an exhaust fan on the rear of the case.

GPU wise, I’ll be using a MSI GeForce RTX 5060 Ti GAMING TRIO OC graphics card for this build, where it measures in at 300mm x 125mm x 44 mm, and hence fits very easily into the case. As I’ve used an EATX board for the demo build, I wasn’t able to use the included GPU support bracket, and used the one that came with the MSI graphics card instead.

Moving things along, and with the demo build nearly completed, it’s a good time to talk about cable management. For this demo build in particular, I barely did any cable management except for two cable ties that I used to secure a bundle of cables to the rear of the motherboard tray, where for the remaining length of cables, I simply stashed them away in the bottom chamber next to the power supply unit (it definitely helped that I did not install a 3.5" hard disk for this demo build, which would have made the said stashing a wee bit more complicated).

While the Eclipse G370A doesn’t come any out-of-the-ordinary cable management features, we do get plenty of cable anchor points with which to secure your cables to with the included zip ties, and of course, openings on the motherboard tray at all the right places to help with cable routing. All in all, building a PC with the Eclipse G370A was as easy as it gets, given its traditional mid-tower layout.

Completed Demo Build Aesthetics

Thermal Performance

To benchmark the thermal performance of the Phanteks Eclipse G370A PC case, I put together a demo build with the following specifications:

• CPU: AMD Ryzen 7 7800X3D (stock settings, PBO & Curve Optimiser disabled)
• CPU Cooler: Thermalright Phantom Spirit 120 SE ARGB
• CPU Thermal Paste: Arctic MX-4
• Motherboard: Gigabyte X670E AORUS MASTER
• Memory: 32GB (2x16GB) KingBank DDR5 Dark Heatsink UDIMM 6000MHz (DDR5 6000 CL28-35-35-76 1.45V)
• Storage: Lexar NM790 1TB NVMe SSD
• Graphics Card: MSI GeForce RTX 5060 Ti 16G GAMING TRIO OC
• PSU: Cooler Master MWE Gold 1050 V2 ATX 3.0
• Case: Phanteks Eclipse G370A
• Case Fans: 4x Phanteks M25-120 G2 120mm (Black, D-RGB) case fans (3x as top panel exhaust, 1x as rear panel exhaust), 3x preinstalled Phanteks M25 120mm on front panel as intake
• OS: Microsoft Windows 11 Pro
• Fan Curve: Stock standard profiles

With F1 23’s in-game benchmark, where I ran a five-lap test for around 9 minutes in total, the Ryzen 7 7800X3D processor in the demo build achieved an average CPU temperature of around 53.5°C, while the GeForce RTX 5060 Ti 16G GAMING TRIO OC by MSI achieved an average GPU temperature of 64.6°C and an average GPU memory junction temperature of 61.4°C - a pretty solid set of thermal results I must say. These results were achieved in an air-conditioned room with a temperature of around 26°C, and for the purposes of benchmarking, the fan curves were left on their stock settings without any further tweaks, where the case fans ran at an average speed of 921RPM for the benchmark duration.

Conclusion & Pricing

To sum up, I think that the Phanteks Eclipse G370A delivers on its value proposition as a no-frills high-airflow PC case that is targeted at both everyday consumers and professionals alike, where it has great thermal performance and is hence well suited for you folks intending to build a performance PC but without the need for a blinged-out PC case. Build quality is decent for its price bracket, though there are a couple of minor things that I wish could have been included, such as having a GPU support bracket that works even with motherboards larger than the ATX form factor, and having default support for more 3.5” hard drives, seeing as this case could be targeted at the workstation crowd after all. In any case, given the Eclipse G370A's good thermal performance, it'll definitely serve your requirements well if you’re looking to build a high-end PC without the need for a pricey tricked-out PC case.

As of the time of publishing this review in mid-August 2025, the Eclipse G370A can be purchased from Newegg for around $59 US dollars, or around $105 Singapore dollars from local PC hardware retailers in Singapore.

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The PC case featured in this article was a review unit sponsored by Corbell Technologies, the official distributor for Phanteks in Singapore.