Question Monitor has no signal with new GPU but works with old GPU

Oct 1, 2020
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Hi all.

I am trying to replace my old GPU (ASUS GT 430) with a new one (Zotac GTX 1650).

Computer:
CPU: i5-2500 (3.3 GHz)
Motherboard: ASUS P8P67 LE
Ram: 12 GB Crucial DDR3 - 1333 (3 banks of 4)
HDD: Western D HDD 7200 (WD1002FAEx)
PSU: Thermomaster TM-420-PMSR (e.g. 420 W)
Case: Coolmaster (no idea which one)
OS: Windows 10 Pro 64-bit
Monitor: ASUS 278H-P

As far as I can tell, the GTX 1650 is compatible with a P8P67 LE. The GT430 works "fine", but as you can imagine, runs like molasses. Bought a new GTX 1650, and swapped them.

When I plugged in my machine and turned it on, received a "No HDMI signal".

Note that the power requirements for the GTX is only 75 W, and does not have any pins (hence runs only on power from PCIe). The recommended PSU is 350 W, and I have 420W. I have but one HDD, and nothing else but the basics (aside from GPU), so I have trouble seeing that I do not have enough power. Further I can tell it is getting power as the GPU fan runs when I turn the computer on. I swapped HDMI cords, and no change. I put the old GT 430 back in, and I am back in business. Swap the GTX 1650, and again no signal. I tried both HDMI ports in my monitor, and tried two HDMI cords. Note that the P8P67 LE does not have an integrated graphics chip, so that can't be interfering.

So... power works, cord works, monitor works, computer works fine with GT 430, but gives no signal with GTX 1650.

What next?

Thanks for any info
 
Last edited:

DSzymborski

Polypheme
Moderator
Gross. This is an extremely old, extremely ancient PSU that can't even handle 200W of +12V power (which is the vast majority of what a PC uses because it's not 1997).

I'd consider it not starting up a feature, not a bug. This garbage is infinitely more likely to fry your PC if it's on than if it's off. Get something halfway safe and send this to the recycling center.

 
Oct 1, 2020
6
1
15
0
Gross. This is an extremely old, extremely ancient PSU that can't even handle 200W of +12V power (which is the vast majority of what a PC uses because it's not 1997).

I'd consider it not starting up a feature, not a bug. This garbage is infinitely more likely to fry your PC if it's on than if it's off. Get something halfway safe and send this to the recycling center.
Ok then...

I clearly do not know enough about PSUs...

I took a quick look, and found the following:

CORSAIR SF Series SF450 CP-9020181-NA 450W SFX 80 PLUS PLATINUM

https://www.newegg.ca/corsair-sf-series-sf450-cp-9020181-na-450w/p/N82E16817139243

450 W (total), with high efficiency, and 37.5 A at 12 V.

Having said that, I take it it is reasonable that failure of the GPU to function was due to a lack of power?

Thanks for your help.
 
Ok then...

I clearly do not know enough about PSUs...

I took a quick look, and found the following:

CORSAIR SF Series SF450 CP-9020181-NA 450W SFX 80 PLUS PLATINUM

https://www.newegg.ca/corsair-sf-series-sf450-cp-9020181-na-450w/p/N82E16817139243

450 W (total), with high efficiency, and 37.5 A at 12 V.

Having said that, I take it it is reasonable that failure of the GPU to function was due to a lack of power?

Thanks for your help.
That's a SFF (small form factor) PSU made to fit in a tiny ITX case. You have a full size ATX motherboard and can use a standard ATX power supply. Also you don't need something that expensive for your older system. This would be fine-

https://www.newegg.ca/corsair-cx-series-cx450m-450w/p/N82E16817139146
 
Oct 1, 2020
6
1
15
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