Downgrade my PSU?

Grimmeh · Mar 9, 2014

Is it ok If I downgrade my PSU back to 300w? I upgraded to a 500w PSU on my PC and I only done that so I can install the GTX 660 MSI OC, but it would not display,it would turn on including the whole computer but It would display including the APU graphics wouldn't either unless I remove the GTX 660 out of my motherboard, and a lot of people say its compatible with my system, and my computer is an HP P6-2376, and the company HP said that it should auto disable the APU graphics when there is a dedicated GPU installed to the Motherboard.

SO should I downgrade my PSU back to 300w because of this reason?
Why?

EasyLover · Mar 9, 2014

Disable built-in graphics in BIOS and select GTX 660 as your primary display adapter. Don't rely on Auto settings if this is the case. Keep the PSU unless it is faulty. Are you correctly connecting the power connectors on 660?

Onus · Mar 9, 2014

What "500W" PSU did you buy?
If you go back to the APU's integrated graphics, you can go back to the 300W PSU. You could also run a GTX750Ti on that PSU, but 300W is not quite enough for a GTX660.

Grimmeh · Mar 9, 2014

EasyLover :

No option like that on HP BIOS 2012, I think, and yes its connected

Grimmeh · Mar 9, 2014

Onus :

EVGA 500w 80 Plus

inzone · Mar 9, 2014

There would be no reason to downgrade the PSU , your computer will only use what it needs for power and what is not used of the 500w will be in reserve if and when it would be needed.
When you installed the GTX 660 you did attach the monitor cable to the video card correct ? Sometime the easiest fix is a simple one if it's not thought of before.

EasyLover · Mar 9, 2014

If this is the PSU then I don't see any reason for GTX 660 not working. You can easily switch to 300W PSU for APU integrated graphics. But question here is why GTX 660 not working

http://www.newegg.com/Product/Product.aspx?Item=N82E16817438012

Though this PSU is average. Check the review

http://www.hardocp.com/article/2013/12/16/evga_500b_500w_power_supply_review/9#.UxyoA_mSxCY

Grimmeh · Mar 9, 2014

inzone :

Yes I did attach the monitor cable to the GTX 660, and I don't know the problem really, I went through BIOS/UEFI and I think theres no option to do that because I can't find it anywhere, but there is an option of Security>Slot Security on the BIOS

EasyLover · Mar 9, 2014

Your motherboard is AAHD2-HY (Holly2) by Pegatron with chipset AMD A55, Memory : DDR3, FSB: 100 MHz, Processor socket: FM1, Gen 2.0 PCIe. It should support GTX 660.

Grimmeh · Mar 9, 2014

EasyLover :

That is not it actually, EVGA 500w 80 Plus Certified http://www.microcenter.com/product/427100/500_Watt_80_Plus_Power_Suply

Grimmeh · Mar 9, 2014

EasyLover :

Yea I know it should, I seen results that it could support on it and a lot of people told me that the GTX 660 is compatible with my system and all I needed to do is upgrade my PSU

EasyLover · Mar 9, 2014

It has 40Amps on its +12v rail. No issue there at least.

Did you properly connect the power connector on GTX 660. In which PCI slot, you installed this card? Did you connect HDMI/DVI cable on this graphics card? Does the same cable work with integrated graphics?

Sorry so many questions, but need answers to work it out.

Grimmeh · Mar 9, 2014

EasyLover :

Your fine.
And yes I properly did, and I insert at the correct PCI slot, I did connect it with DVI cable on the GPU, and the same cable works with the Integrated Graphics, but when the GTX 660 was installed to the motherboard with the PSU cable connected so it can power, It would not display including the Integrated graphics, If I take out the GTX 660 out of the Motherboard, the Integrated Graphics would work without it somehow.
Motherboard: http://h10025.www1.hp.com/ewfrf-JAVA/Doc/images/353/c03345727.jpg

EasyLover · Mar 9, 2014

Try to update BIOS of the mobo and then clear CMOS before installing GTX 660.

Grimmeh · Mar 9, 2014

EasyLover :

I probably don't have to update, in the BIOS/UEFI there is a selection of Security>Security Slots. It would show all PCI Slots. Also what is CMOS? It might be a dumb question

Karadjgne · Mar 9, 2014

Dedicated Gpu's have 2 major advantages over APU's. 1) they are upgradable. 2) they have their own cooling solutions. In reality this means if you get hot and heavy into a great game, the gpu will spin up to cool itself down. In an APU, its your actual CPU that's getting heated up and pushed towards its max thermal settings. This is never a good thing. Heat is a CPU killero and unless you have a good cooler like a cm hyper 212 plus, EVO, t4, you actually run the risk of damaging the APU. Check the bios to see if the pci-e is set as the primary gpu. Check to make sure both motherboard connectors are seated correctly (20+4 pin and 4/8 pin) and both pci-e 6-pin connectors are seated on the gpu. Also check which port you are hooked into. Some gpus require hdmi to be set before being able to use a hdmi port, and don't automatically detect that option.

The gtx 660 is a great mid level card, and by itself is compatible with any system, as long as there is a PCI-e slot and required power connections. Any add-on gpu is built that way, from bottom of the line to the absolute top. The only issue of comparability comes in with the addition of a powerful gpu with a limited CPU and there you will see bottlenecking as the CPU can't keep up with the gpu, or vise-versa.

So, unless you got a DOA gpu, or missed a setting somewhere, or didn't pre-load the drivers for the 660 before adding the gpu, you should be good to use it.

Grimmeh · Mar 9, 2014

Karadjgne :

Dedicated Gpu's have 2 major advantages over APU's. 1) they are upgradable. 2) they have their own cooling solutions. In reality this means if you get hot and heavy into a great game, the gpu will spin up to cool itself down. In an APU, its your actual CPU that's getting heated up and pushed towards its max thermal settings. This is never a good thing. Heat is a CPU killero and unless you have a good cooler like a cm hyper 212 plus, EVO, t4, you actually run the risk of damaging the APU. Check the bios to see if the pci-e is set as the primary gpu. Check to make sure both motherboard connectors are seated correctly (20+4 pin and 4/8 pin) and both pci-e 6-pin connectors are seated on the gpu. Also check which port you are hooked into. Some gpus require hdmi to be set before being able to use a hdmi port, and don't automatically detect that option.

The gtx 660 is a great mid level card, and by itself is compatible with any system, as long as there is a PCI-e slot and required power connections. Any add-on gpu is built that way, from bottom of the line to the absolute top. The only issue of comparability comes in with the addition of a powerful gpu with a limited CPU and there you will see bottlenecking as the CPU can't keep up with the gpu, or vise-versa.

So, unless you got a DOA gpu, or missed a setting somewhere, or didn't pre-load the drivers for the 660 before adding the gpu, you should be good to use it.

Wait, I have to download the Drivers before adding the GTX 660?
And in the BIOS, where can I find that? The BIOS is HP Utility Setup

ko888 · Mar 9, 2014

Check the voltages of all of the rails on that EVGA 100-W1-0500-KR and see if they're within ATX12V specs.

You can also try using a better quality power supply unit. The EVGA 100-W1-0500-KR is made by HEC/Compucase. Those low end HEC PSUs usually have a flaky +3.3V rail and will cause the motherboard to not latch into the ON state when the power button is pressed. All you'll notice is a twitch of the cooling fans and nothing else.

Grimmeh · Mar 9, 2014

ko888 :

When I first set it up with the GPU, everything was perfect, then the next turn on the GTX 660 didnt power on at that time, then I made few adjusts see if nothing is loose, powered up, everything was working, then no displays were made

ko888 · Mar 9, 2014

Grimmeh :

Is nothing showing up on the monitor including POST screens when plugged into the new graphics card?

Inserting the new discrete graphics card will automatically disable the integrated graphics.

Grimmeh · Mar 9, 2014

ko888 :

Yes including the post screens(Which is the logo?)
Could it be the drivers?

ko888 · Mar 9, 2014

Grimmeh :

If the HP logo isn't showing up that has nothing to do with graphics card drivers since the Operating System has not even begun to be loaded at that point.

Has the new graphics card ever put out a video signal that you could see on the monitor?

Grimmeh · Mar 9, 2014

ko888 :

No actually, it does not give signal to the monitor, tried different monitors and still no signal. When the GTX 660 is installed in the motherboard, the Integrated Graphics will not give signal either, it could mean that it is automatically disabled if I'm correct

ko888 · Mar 9, 2014

Grimmeh :

Yes, the integrated graphics is automatically disabled when you install a discrete graphics card.

Does the new graphics card work in another computer?

Grimmeh · Mar 9, 2014

ko888 :

Grimmeh :

Yes, the integrated graphics is automatically disabled when you install a discrete graphics card.

Does the new graphics card work in another computer?

I have not tried to install it in another computer.

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