Specification and Test Methodology
Corsair Obsidian Series 750D Specification |
|
|---|---|
| Materials | Brushed Aluminium and Steel |
| Available Colours | Black |
| Motherboard Support | Micro ATX / ATX / E-ATX / XL-ATX |
| External Optical Bays | 5.25in x 3 |
| Internal Storage Bays | 2.5in x 4 2.5/3.5in x 6 |
| Cooling | Support for up to 8 fans (3x AF140L fans included) |
| Radiator Support | Top: up to 360mm Front: up to 280mm Bottom: up to 240mm |
| Expansion Slots | 9 |
| Max CPU Cooler Height | 180mm |
| Max GPU Length | 460mm |
| I/O Panel | USB 3.0 x 2 USB 2.0 x 2 Mic x 1, Audio x 1 |
| Power Supply Mount | ATX (PSU not included) |
| Dimensions (H x W x L) | 560mm x 235mm x 546mm |
Test System Configuration |
||
|---|---|---|
| Motherboard | ASUS Sabertooth Z77 | |
| CPU | Intel Core i5-3570K @ 4.4GHz | |
| CPU Cooler | Arctic Cooling Freezer 13 | |
| Memory | G.Skill Ripjaws-X 8GB (F3-12800CL7D-8GBXH) | |
| Memory Speed and Timings | 1,600MHz, 7-8-7-24-2N | |
| Graphics Cards | 2x Sapphire Radeon HD 7950 OC in CrossFireX | |
| Storage | 120GB SanDisk Extreme SSD | |
| Optical Drive | Pioneer DVR-S19LBK DVD Writer | |
| Power Supply | Corsair HX1050W | |
Our Z77 test platform consists of an ASUS Sabertooth motherboard, an Intel Core i5-3570K processor overclocked to a modest 4.4GHz, an Arctic Cooling Freezer 13 cooler, 8GB of high-performance G.Skill Ripjaws-X memory and two factory-overclocked Sapphire Radeon HD 7950 OC graphics cards in a CrossFireX configuration.
To find out how well the chassis can cool this particular setup, we record the CPU temperature during a 15-minute stint of the Prime95 small-FFT stress test. In order to provide a stabilised reading we then calculate an average temperature across all cores from the last five minutes of testing.
To get an idea of GPU cooling performance, we then record the highest GPU temperature after 15 minutes of running Aliens vs. Predator. Last but not least, we also measure chassis noise by using a PCE-318 noise meter to take readings when idle and while running Aliens vs. Predator.
All chassis are tested only with the standard manufacturer-supplied fans (any/all of which are set to 'silent' in the ASUS BIOS or low-speed using a fan controller if present), and to take into account the fluctuating ambient temperature, our graphs depict both actual and delta temperature - the latter is the actual CPU/GPU temperature minus the ambient. For the record, room temperature while testing today's chassis was recorded as 22.9ºC.
