Upgrade Power supply

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gerry normandeau

Honorable
Mar 29, 2013
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Acer Aspire PT.SHWP2.001
I have already upgraded my video card. What is a good 400 watt power supply that will fit in this case? Also is 400 watts enough? I use this computer as an HTPC.

The problem I am having is that when i play a 1080 p version of a movie file the TV screen slows down ,hesitates, and freezes. If I play a 780p version I have no problem. I upgraded the video card to a Sapphire Radeon HD 5450 100292DDR3L Video Card - 1GB, DDR3, PCI-Express 2.0(x16), 1x Dual-link DVI-I, 1x HDMI, 1x VGA, DirectX 11, Single-Slot, Low Profile

If I need a bigger PSU what is the type that will fit into a 4" case. I ordered a
ATHENA PWR|AP-MP4ATX55FEP8 RT but it was to wide.
 
Solution
ko888


If you're using a USB 2.0 port on the host device then that's your problem. USB 2.0 doesn't have sufficient bandwidth to keep up with the amount of data needed from the 1080p files so the host has to wait, i.e. hesitate, until enough of the data arrives in the buffer to be able to assemble and display an image frame.

A local hard disk drive or SSD on the SATA bus would be the ideal solution. It doesn't have to be the C: drive. If you have the space...
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geofelt

geofelt

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Oct 9, 2006
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If you have already upgraded your video card, and it is working ok, you don't need a different PSU.
The PSU size you need is primarily determined by the video card.
Exactly what card did you upgrade to?
If your current psu is noisy, it is because it is under load, and perhaps a stronger psu would quiet things down, A good thing for a HTPC.
 
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ko888

ko888

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Feb 18, 2009
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I don't think you'll be able to find a decent quality 400 Watt FLEX ATX form factor power supply.

What is the brand and model of your new graphics card?

400 Watts would indicate to me that it is an AMD Radeon HD graphics card. The recommended minimum of 400 Watts is just ludicrous for some of their entry level cards. Even for the Radeon HD 6450 27 Watt card they specify a 400 Watt power supply unit.
 
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G

gerry normandeau

Honorable
Mar 29, 2013
5
0
10,510






The problem I am having is that when i play a 1080 p version of a movie file the TV screen slows down ,hesitates, and freezes. If I play a 780p version I have no problem. I upgraded the video card to a Sapphire Radeon HD 5450 100292DDR3L Video Card - 1GB, DDR3, PCI-Express 2.0(x16), 1x Dual-link DVI-I, 1x HDMI, 1x VGA, DirectX 11, Single-Slot, Low Profile

If I need a bigger PSU what is the type that will fit into a 4" case. I ordered a
ATHENA PWR|AP-MP4ATX55FEP8 RT but it was to wide.

 
Upvote 0 Downvote
G

gerry normandeau

Honorable
Mar 29, 2013
5
0
10,510


The problem I am having is that when i play a 1080 p version of a movie file the TV screen slows down ,hesitates, and freezes. If I play a 780p version I have no problem. I upgraded the video card to a Sapphire Radeon HD 5450 100292DDR3L Video Card - 1GB, DDR3, PCI-Express 2.0(x16), 1x Dual-link DVI-I, 1x HDMI, 1x VGA, DirectX 11, Single-Slot, Low Profile

If I need a bigger PSU what is the type that will fit into a 4" case. I ordered a
ATHENA PWR|AP-MP4ATX55FEP8 RT but it was to wide.
 
Upvote 0 Downvote
ko888

ko888

Titan
Feb 18, 2009
16,708
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84,990


A Radeon HD 5450 should only be drawing 8 Watts during Blu-ray playback.

My suspicion is that the hesitations may be caused during hard disk drive access when the movie file is being read from the HDD it is unable to keep up.

720p files are smaller than 1080p files. 2.25x more data needs to be streamed when playing 1080p compared to 720p.

Your power supply isn't the problem.

If you were replacing your power supply unit you will need something like the following:

FSP Group FSP300-60LG 300W Mini ITX / Flex ATX 80 PLUS BRONZE Certified Active PFC Power Supply - OEM
http://www.newegg.com/Product/Product.aspx?Item=N82E16817104145

Athena Power AP-MFATX40 400W Mini ITX 80 PLUS BRONZE Certified Active PFC Power Supply
http://www.newegg.com/Product/Product.aspx?Item=N82E16817338081
 
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G

gerry normandeau

Honorable
Mar 29, 2013
5
0
10,510


I keep all my movies on a Western Digital My Book Essential 2 TB USB 3.0/2.0 Desktop External Hard Drive WDBACW0 connected by a USB 2.0 cable to my home network. Would I be Better off replacing my C drive with a larger one so I can Read of my computer for a faster transfer speed?

 
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ko888

ko888

Titan
Feb 18, 2009
16,708
41
84,990


If you're using a USB 2.0 port on the host device then that's your problem. USB 2.0 doesn't have sufficient bandwidth to keep up with the amount of data needed from the 1080p files so the host has to wait, i.e. hesitate, until enough of the data arrives in the buffer to be able to assemble and display an image frame.

A local hard disk drive or SSD on the SATA bus would be the ideal solution. It doesn't have to be the C: drive. If you have the space in your system to add a second drive then it can be added as strictly a data drive.
 
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