My PSU crapped out and I am out of warranty time. What is a 3rd party PSU that would fit? Any mATX size?

http://m.newegg.com/Product?itemNumber=N82E16817371016 is what I used, however with the modular cables and the way it is turned in the case, the case doesn't close right. Just make sure if you get psu it's dimensions are less than : W x H x L, 150 x 86 x 140 mm, 5.90" x 3.39" x 5.51" inch.

would that be compatible with 2011 socket processor?

Not enough information to answer the question. If you are doing a monster build with power hungry components, this is probably not the case for you. There is not a lot of space inside this case. My video card power connector slightly pushes on the cover. It has an odd sized power supply, so upgrades are limited on that end. So far, it's been a great case for me.

What is the biggest video card that will fit in this case? I want to put an MSI R9 270x HAWK into it, but I'm not sure if it will fit. It is 10.35" (or about 263mm) long. I'm not worried about ventilation; I'll be modifying the door to install more vents and fans anyway. Thank you!

The short answer is "no". The reason is because the opening between the case lips is 9.5". The actual card slot does barely have room for 10.35", but the height and width of the "MSI R9 270x HAWK" prevents it from being tilted and maneuvered much. There is a chance someone could squeeze it in there, but I would not recommend it since it could damage the card.

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In Win BK644. SFF mATX Computer Case with 300W Haswell Ready power supply, PPCT, USB2.0 x 4, HD audio, Air Filter

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0.6mm SECC Japanese ECO Steel MicroATX Mini Tower
USB 2.0 x 4, HD Audio x 1 Front Ports
300W Power Supply
1 External 5.25" Drive Bays
1 Internal 3.5" Drive Bays

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A great blend of quality, function and style, the IN WIN BK644 mini tower case offers an ideal choice for digital home, digital office other space-constrained environments, at an unbeatable price. System cooling is taken into serious consideration. The 3rd Generation of Partition Plate Cooling Technology (PPCT) featuring an adjustable air duct delivers exceptional thermal and acoustic performance. The support for standard desktop components simplifies your hardware choices and minimizes your Total Cost of Ownership. A quality 300W SFX power supply is included for out-of-the-box application.

3rd Generation of Partition Plate Cooling Technology (PPCT)PPCT is the world's first advanced thermal and acoustic cooling technology, which provides S.F.F. chassis with excellent thermal solutions while creating a quieter computing experience. The 3rd generation of PPCT includes an adjustable air duct for various CPU fans and efficiently eliminates overheat while enhances airflow of entire system.
Standard ComponentsThe IN WIN BK644 supports standard size components and 4x full height PCI cards. The use of standard components helps to maximize configuration choices and minimize product costs.
Easy InstallationDetachable 5.25” optical drive bracket for easy installation.
300W Power Supply IncludedStandard SFX 12V 300W power supply platform offers high performance / low power solution.

Model
Brand	IN WIN
Model	BK644.BH300TB

Details
Type	Micro ATX Mini Tower
Color	Black
Case Material	0.6mm SECC Japanese ECO Steel
With Power Supply	300W
Power Supply	300W
Power Supply Mounted	Bottom
Motherboard Compatibility	Micro ATX
Dust Filters	Yes

Expansion
External 5.25" Drive Bays	1
External 3.5" Drive Bays	1
Internal 3.5" Drive Bays	1
Expansion Slots	4

Front Panel Ports
Front Ports	USB 2.0 x 4, HD Audio x 1

Dimensions & Weight
Dimensions (H x W x D)	10.80" x 5.50" x 12.70"

Additional Info
Features	3rd Generation of Partition Plate Cooling Technology (PPCT) - PPCT is the world's first advanced thermal and acoustic cooling technology, which provides S.F.F. chassis with excellent thermal solutions while creating a quieter computing experience. The 3rd generation of PPCT includes an adjustable air duct for various CPU fans and efficiently eliminates overheat while enhances airflow of entire system. - No second fan needed. - Support LGA1156 Socket and downward compatible (LGA775) Adjustable Partition Plate Cooling Tech accommodates different motherboards and provides the optimal thermal performance. Detachable 5.25” optical drive bracket for easy installation. Standard SFX 12V 250W & 300W power supply platform offers high performance / low power solution. Designed to fit standard Micro ATX motherboards for easy system integration. Designed for Digital Home and Digital Office. Supports 4 x full height slots for GFX / TV tuner cards. Optional removable air filter. Optional screwless designs-ODD / FDD / HDD bays and top cover clips for easy installation. Meets RoHS, CE and FCC Class B requirements

Additional Information
First Listed on Newegg	September 24, 2009

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Warranty

Limited Warranty period (parts): 2 years
Limited Warranty period (labor): 2 years
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In Win BK644. SFF mATX Computer Case with 300W Haswell Ready power supply, PPCT, USB2.0 x 4, HD audio, Air Filter

Learn more about the In Win BK644.BH300TB

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Warranty, Returns, And Additional Information

Warranty

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Manufacturer Contact Info

Item#: N82E16811108191

In Win BK644. SFF mATX Computer Case with 300W Haswell Ready power supply, PPCT, USB2.0 x 4, HD audio, Air Filter

Learn more about the In Win BK644.BH300TB

Customer Reviews of the In Win BK644.BH300TB

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info