Specification and test methodology
Antec Three Hundred Two specification |
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Material | Steel structure with plastic front panel | |
Colour | Black with grey interior | |
Motherboard Support | ATX, Micro-ATX, Mini-ITX | |
Drive Bays | External | 5.25in x 3 |
Internal | 3.5in x 6 2.5in x 2 |
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Cooling | Rear | 1 x 120mm TwoCool exhaust fan |
Top | 1 x 140mm TwoCool exhaust fan | |
Front | 2 x 120mm intake fans (optional) | |
Side | 1 x 120mm intake fan (optional) 1 x 120mm exhaust fan (optional) |
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Expansion Slots | 8 | |
Front I/O Ports | USB 3.0 x 2 (backward compatible with USB 2.0) Audio x 1 Mic x 1 |
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GPU Clearance | 318mm (max length) | |
CPU Cooler Clearance | 170mm (max height) | |
Power Supply | ATX (not included) | |
Net Weight | 6.9kg | |
Dimensions | 513mm (H) x 229mm (W) x 471mm (D) |
Test System Configuration |
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Motherboard | ASUS P6X58D | |
CPU | Intel Core i7 980X Extreme Edition (with reference DBX-B cooler) | |
Memory | 6GB (3 x 2GB) Corsair Dominator DDR3 | |
Graphics Card | AMD Radeon HD 6970 | |
Power Supply | Corsair HX1050W | |
Storage | Intel SSD |
To find out how well the chassis can cool, we've loaded it up with an X58 test platform and run a series of CPU and GPU benchmarks for comparison against a variety of mid-tower alternatives.
Firstly, CPU cooling performance is measured by setting fan speed to low and recording CPU temperature when the system is idle. We then apply a 15-minute load of the Prime95 stress test and record CPU temperature again. To demonstrate the chassis' optimum cooling capability, we also set all fans - including the CPU cooler - to high speed mode and re-run the Prime95 torture test for a further 15 minutes.
Secondly, GPU temperature is also recorded in three states; idle, load with fans at standard speed and load with fans at high speed. In this test, GPU load is defined as a 15-minute stint of Furmark.
And finally, to find out how loud the chassis can get we're using a PCE-318 noise meter placed at the front of each chassis to take decibel readings with the system idling in two modes; low fan speed and high fan speed.
All chassis are tested only with the standard manufacturer-supplied fans, and to take into account the fluctuating ambient temperature, our graphs depict the delta temperature - that's actual CPU/GPU temperature minus the ambient. Just so we're clear, room temperature at the start of testing was recorded for each chassis as follows:
Ambient Temperature During Testing (ºC) |
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Antec SOLO II | 18.5 |
Antec Three Hundred Two | 21.3 |
Cooler Master Silencio 550 | 23.9 |
Corsair Carbide 300R | 21.3 |
Corsair Carbide 400R | 24.6 |
Corsair Carbide 500R | 18.9 |
Corsair Graphite SE 600T | 21.2 |
Corsair Obsidian 650D | 21.4 |
Fractal Design Core 3000 | 20.9 |
NZXT Phantom 410 | 19.4 |
NZXT Tempest 410 Elite | 22.7 |
SilverStone Raven RV03 | 21.9 |
SilverStone Temjin TJ04-E | 20.4 |