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Silent Flex ATX PSU?

post #1 of 3
Thread Starter 
Hey guys. I just finished up a build for my bedroom HTPC which consists of:

Intel i3 530
Zotac H55itx-c-e
2GB Corsair xms3
WD 320GB 2.5" drive
Asus Bluray Drive
Element Q case

This is was to be a small, cheap, quiet bedroom HTPC to replace my loud Xbox 360 extender. I am currently using the stock Intel cooler, since it is low profile and fits perfectly in the case. The case itself came with a 220w PSU, but there seems to be an issue with it. The fan is annoying and almost as loud as the Xbox was (old 20GB, no HDMI... they are loud!) and it also has a high pitch whine that fluctuates with demand. So, if it is writing to the disk, CPU in use, you sneeze... it squeals.

I am going to pull it apart tonight and make sure the PSU is the source of the noise (95% sure it is) and if so, ask Thermaltake for an RMA. Failing that, does anyone know of a good, quiet Flex ATX PSU that is atleast the same, if not more, wattage?

I am pretty sure the current PSU is enough to power everything, but I may be stressing it to the point the where the transformer is being overworked. I calculated the wattage needed to be 190, assuming the efficiency rating is atleast 70, leaving me ~30w of headroom.

So I am open to suggestions because the fan alone is reason to replace this PSU.
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post #2 of 3
Quote:
Originally Posted by BlackandBlue;11927663 
I am going to pull it apart tonight and make sure the PSU is the source of the noise (95% sure it is) and if so, ask Thermaltake for an RMA. Failing that, does anyone know of a good, quiet Flex ATX PSU that is atleast the same, if not more, wattage?

I am pretty sure the current PSU is enough to power everything, but I may be stressing it to the point the where the transformer is being overworked. I calculated the wattage needed to be 190, assuming the efficiency rating is atleast 70, leaving me ~30w of headroom.

So I am open to suggestions because the fan alone is reason to replace this PSU.
Unless you're running IBT on your HTPC, it would use less than 100W tops. Heck, even running IBT+Furmark, the max load on my M-ITX i3-530 build was just 80~90W from the wall measured with a Kill-A-Watt.

Also, you calculate efficiency after DC wattage. If a PSU is rated for 220W with 70% efficiency, that means if your load is 70W, it will suck 100W from the outlet. Granted, I'm not sure how accurate the 220W label on that Thermaltake is. A lot of companies lie about the wattage their power supplies can deliver.

Sparkle and Fortron/FSP makes some Flex ATX power supplies. You might want to try those. They're all pretty low wattage but even 150W should be plenty for your build.
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Garnet
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post #3 of 3
Thread Starter 
Quote:
Originally Posted by rui-no-onna;11927777 
Unless you're running IBT on your HTPC, it would use less than 100W tops. Heck, even running IBT+Furmark, the max load on my M-ITX i3-530 build was just 80~90W from the wall measured with a Kill-A-Watt.

Thats good to know, I have not picked up one of those yet.
Quote:
Also, you calculate efficiency after DC wattage. If a PSU is rated for 220W with 70% efficiency, that means if your load is 70W, it will suck 100W from the outlet. Granted, I'm not sure how accurate the 220W label on that Thermaltake is. A lot of companies lie about the wattage their power supplies can deliver.

I did, just didnt put the math out to bore everyone wink.gif Basically I took the most everything would use (I figured 145w) and then *1.3 to get the value with the 70% efficiency rating that i made up smile.gif I just through the 30w figure out there since I am rounding everything anyway.
Quote:
Sparkle and Fortron/FSP makes some Flex ATX power supplies. You might want to try those. They're all pretty low wattage but even 150W should be plenty for your build.

That is good that I am not overstressing the PSU. I know they do not make much higher than 300w for this size. I was looking at a 80+ silver Sparkle somewhere that I may snatch up.... I think it was 250w and around $50.
Nart
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Hard DriveOptical DriveOSMonitor
OCZ Agility 2 60GB/WD 320GB Lite-on DVD Burner Windows 7 Ultimate HP W2408 
KeyboardPowerCaseMouse
G15 Corsair 750w Cosmos S DeathAdder 
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Nart
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CPUMotherboardGraphicsRAM
Q6600 (L737A771) DFI x48 Dark HIS 4870 4GB Gskill PC2 8500 PK 
Hard DriveOptical DriveOSMonitor
OCZ Agility 2 60GB/WD 320GB Lite-on DVD Burner Windows 7 Ultimate HP W2408 
KeyboardPowerCaseMouse
G15 Corsair 750w Cosmos S DeathAdder 
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Reply
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