Corsair 750D User manual
CONGRATULATIONS!
!
Thank you for purchasing
an Obsidian Series®750D
Full-Tower PC case.
The 750D has a clean, elegant exterior
that dispenses with arbitrary plastic
add-ons in exchange for the beauty
of brushed aluminum and solid steel.
This rigid, rugged exterior surrounds
a frame that has ample room for
high-performance components and the
sophisticated cooling you’ll need if you’re
going to push those components to their
limits. And, it incorporates a host of clever
builder-focused features, because we
know that building a system should be
straightforward, trouble-free and even fun.
mm mm
mm
MaximumGPUlength
Topslots mm
Lowerslots mm
MaximumCPU
coolerheight
mm
Obsidian Series® 750D
Full-Tower PC Case
with one AF140L rear
exhaust fan and two
AF140L front intake
fans
Installation Guide
Accessory Kit
OBSIDIAN SERIES®
750D
CONTENTS
x x x x
MBD/HDD screws Long fan screws Short fan screws SSD/ODD screws
x x xx
Motherboard
standos
SSD pan
head screws
HDD tray screws Cable ties
A
A
B
C
D
E
F
G
OBSIDIAN SERIES®750D FULL-TOWER PC CASE OBSIDIAN SERIES®750D FULL-TOWER PC CASE
(x3) Corsair AF140L fans included
Top triple 120mm or dual 140mm fan mounts
compatible with 240/280/360mm radiators
Rear 120/140mm fan mounts compatible
with 120/140mm radiators
Front dual 120/140mm fan mounts
compatible with 240/280mm radiators
A
(x2) USB 3.0, (x2) USB 2.0, Headphone/Mic, Power/Reset
Full windowed side panel
CPU backplate cutout
B
C
D
E
F
G
H
I
J
K
L
M
N
H
I
J
K
L
M
N
OBSIDIAN SERIES®750D FULL-TOWER PC CASE OBSIDIAN SERIES®750D FULL-TOWER PC CASE
Built-in cable routing cutouts with grommets
(x3) Tool-free removable optical drive bays
Tool-free 3.5" hard drive cages with 2.5" compatibility
(x4) Tool-free 2.5" SSD removable caddies
(x9) Expansion slots for GPUs
Removable front and bottom low restriction dust filters
Bottom dual 120mm fan mounts
compatible with 240mm radiators
> Install your motherboard's I/O shield
(see your motherboard’s manual for guidance).
> Align the motherboard with the standos in the case.
> Secure with the included screws (MBD/HDD screws).
Installing the motherboardRemoving the side panels
> Remove the thumbscrews and slide the side panel back and out.
Note: Corsair recommends removing both side panels and setting
them aside when building your system to avoid accidental damages.
> Remove thumbscrews and corresponding slot cover(s).
> Install the add-on card and secure with thumbscrews.
Installing the PCI-E/PCI cardsInstalling the power supply (PSU)
> Seat the PSU on the bottom of the case.
> Align holes and secure the PSU with screws.
Note: PSU can be installed in either fan up or fan down orientations.
Installing a 5.25" drive/devices (ODD)
> Remove the front panel 5.25" drive bay cover.
> Insert the ODD into the drive bay until the tool-free
latch clicks, securing the drive.
> To remove, push the tool-free tab to release
the ODD drive and remove.
A B
Installing a 2.5" SSD into tool-free expandable SSD cage
> Pull down the tab and place the SSD into
the tool-free cage until you feel it secure.
> To remove the SSD, pull the tab down to release.
> Remove the tool-free 3.5" HDD tray.
> Insert the HDD into the HDD tray.
> Align the HDD holes with the tray pins to secure.
Note: To mount a 2.5" drive in this tray, it is necessary to remove one
of the side pins and secure the drive from underneath with screws.
Installing a 3.5" HDD/ 2.5" SSD
A
B
> To remove the front panel dust filter, first remove the
solid front panel by pushing the top corners of the aluminum cover.
> The front solid panel will pop out for access to the front dust filter.
> Remove the front dust filter by pressing the arrowed tab located on the top center.
> To remove the bottom dust filter, first locate the pull out tab underneath the PSU, then
pull the bottom dust filter out.
Removing the front and bottom dust filters
USB 3.0
HD AUDIO
USB 2.0
RESET SW POWER LED +
POWER LED –POWER SW HDD LED
> See your motherboard’s manual for front panel header locations and pin-outs.
Installing the front I/O connectorsAttach case fan cables to motherboard headers
> See your motherboard’s manual for fan header locations.
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