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Quick PSU question for Mobo

post #1 of 9
7/17/12 at 1:08pm
Thread Starter 
If I have a 20-pin running a 24-pin board, do I lose power to my PCI-E 16x slot and 1x slots? Or, is it just power to the 16x slot or is it to both?

It's a slow-low-end build for general TV/HTPC use.

mATX board - ECS GeForce 7050M-M v2
PSU is generic Sparkle 350w older 20-pin type

No PSU GPU, but I do have a TV tuner in the 1x slot that is recognized in device manager but not working when trying to be detected by WMC.

( edit )
Mistake fixed
Edited by GanjaSMK - 7/17/12 at 2:10pm
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post #2 of 9
7/17/12 at 1:17pm
  • Schmuckley
  • No keyboard detected! Press F1 to continue..
I'm stumped on that one..even the PSUs I've salvaged have been 24-pin.
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post #3 of 9
7/17/12 at 1:22pm
Quote:
Originally Posted by GanjaSMK View Post

If I have a 20-pin running a 24-pin board, do I lose power to my PCI-E 16x slot and 1x slots? Or, is it just power to the 16x slot or is it to both?
It's a slow-low-end build for general TV/HTPC use.
mATX board - ECS GeForce 7050M-M v2
PSU is generic Sparkle 350w older 20-pin type
No PSU, but I do have a TV tuner in the 1x slot that is recognized in device manager but not working when trying to be detected by WMC.

No, +12v = +12v and +3.3v = +3.3v.

The traces are all connected anyways. The additional 4 pins are to reduce current load on the the other wires. A HTPC will not be drawing enough power for this to be an issue.


Being a cheap old PSU... they probably used the cheaper pins...... you can probably pull 12v@70-120w and 12v@60-80w.
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post #4 of 9
7/17/12 at 1:24pm
Quote:
Originally Posted by GanjaSMK View Post

If I have a 20-pin running a 24-pin board, do I lose power to my PCI-E 16x slot and 1x slots? Or, is it just power to the 16x slot or is it to both?
It's a slow-low-end build for general TV/HTPC use.
mATX board - ECS GeForce 7050M-M v2
PSU is generic Sparkle 350w older 20-pin type
No PSU, but I do have a TV tuner in the 1x slot that is recognized in device manager but not working when trying to be detected by WMC.
Yes, you lose power (not a very good description of what's happening but we'll leave it that way) to all PCIe slots, even so it shouldn't be an issue without a somewhat demanding discrete video card.

What specific TV Tuner do you have?
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post #5 of 9
7/17/12 at 2:07pm
Thread Starter 
Quote:
Originally Posted by Original Sin View Post

Quote:
Originally Posted by GanjaSMK View Post

If I have a 20-pin running a 24-pin board, do I lose power to my PCI-E 16x slot and 1x slots? Or, is it just power to the 16x slot or is it to both?
It's a slow-low-end build for general TV/HTPC use.
mATX board - ECS GeForce 7050M-M v2
PSU is generic Sparkle 350w older 20-pin type
No PSU, but I do have a TV tuner in the 1x slot that is recognized in device manager but not working when trying to be detected by WMC.
Yes, you lose power (not a very good description of what's happening but we'll leave it that way) to all PCIe slots, even so it shouldn't be an issue without a somewhat demanding discrete video card.

What specific TV Tuner do you have?

It's a WinTV-HVR-1800 (OEM version of the 1850 model - identical, roughly 2007 I think) that I picked up for $7.50 yesterday used.

After installing it, it instantly recognized without having to download drivers in Windows 7 HP (x86), I then ran an update to check for drivers and it installed one that was updated or newer. I then went to try and set it up in WMC and what I get when it tries to detect a signal is a blue-colored-screen (I can actually take a picture if need be).

So, I'm just wondering if it's the card or if it's a lack of power. thinking.gif
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post #6 of 9
7/17/12 at 2:14pm
That's a very low power part, I wouldn't blame it on the PSU.

Check this and make sure you're doing everything correctly.
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post #7 of 9
7/17/12 at 2:19pm
Thread Starter 
Hrm I have my next question handy then. tongue.gif

I did read that guide already and that got me thinking - do I need the install CD to make the device usable (and if so NP, I'll just buy the CD)?

I was under the impression I did not need the CD to make it work with Windows 7 WMC; but if I do then I'm SOL until I can get it.

I don't have any of the accessories or CD, just the card. I have a remote with a USB IR blaster that already works perfectly in WMC and I was hoping it would work just fine with the HVR too.
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post #8 of 9
7/17/12 at 3:05pm
Thread Starter 
Alright thanks for all the help and answers. I think the TV card is bad, can't get it to do anything it is supposed to. Will have to try and replace it for another one at the place I got it from. Thanks everyone.
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post #9 of 9
7/17/12 at 3:22pm
The downloaded drivers should be fine, you shouldn't need the CD.

You're welcome!
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