New Graphics Card & Power Supply Now Monitor Won't Turn On

EveryNameIsTaken · Mar 2, 2017

Hey guys!

I have a Lenovo k450e, the graphics card it originally came with needed to be replaced. Took it out and ran it on the integrated graphics for a few months. I just got a new card, and a new power supply. The original power supply is 280w, and the new card needs at least 400w and a 6 pin.

When both are installed, the machine boots up and into Windows, but the monitors stay black. Zero signal to them. I took out the new card and it does the same thing with just the new power supply installed. Take them both out, put everything back as it was and it works fine again.

There may be old drivers from the old card that I can try to remove, but first I'm wondering if maybe this is all too much for my Motherboard to handle?

New card: Gigabyte GeForce GTX 750ti 4GB
New Power Supply: EVGA 400w

Sytem Info:
Processor: Intel(r) Core(TM) i5-4460 CPU @ 3.20GHz, 3201 Mhz, 4 Core(s), 4 Logical Processor(s)
Installed Physical Memory (RAM): 12.0 GB ***After looking, it's an 8 GB stick and a 4 GB stick, so I'm planning to grab another 8 GB stick to replace the 4 GB***

Any insight to what may be going on would be much appreciated!

chemmajorp53 · Mar 2, 2017

Is there a setting in the BIOS to change your primary video output from integrated graphics to the GPU? I'd also reset the CMOS if you can and, if none of that works, call lenovo to make 100% sure that that video card is supported for your desktop. It should be.

Lutfij · Mar 2, 2017

1| Make sure your motherboard's BIOS is up to date.
2| Can you link the model of that PSU?
3| You forgot to include the OS. Are you on Windows 10? If so, did you migrate to Windows 10?
4| If you must perform a ram upgrade, you should always work with ram kits since they will be matched(and come off one assembly line+come with better binned chips).
5| While on your iGPU, use DDU to remove your previous GPU's drivers. Speaking of which, what was your previous GPU?

EveryNameIsTaken · Mar 2, 2017

chemmajorp53 :

That was going to be the next step. Going into BIOS and see what it's set at and changing it to PCI-E if need be.

After putting everything back as it was, it still wasn't showing anything to the monitors. So I re-seated the RAM, that did nothing. Reset the CMOS and that fixed it.

chemmajorp53 · Mar 2, 2017

You have the 750 ti with no 6-pin power connector right?

EveryNameIsTaken · Mar 2, 2017

Lutfij :

1| Make sure your motherboard's BIOS is up to date.
Will double check this!
2| Can you link the model of that PSU?
This one
3| You forgot to include the OS. Are you on Windows 10? If so, did you migrate to Windows 10?
Yes, Windows 10. I upgraded to it back when they pushed the download to everyone.
4| If you must perform a ram upgrade, you should always work with ram kits since they will be matched(and come off one assembly line+come with better binned chips).
Gotcha. It's not on my priority list, but something to consider for the near future. This is the first time I've really opened it up and looked, beyond taking out the old graphics card, and realized the ram is mismatched.
5| While on your iGPU, use DDU to remove your previous GPU's drivers. Speaking of which, what was your previous GPU?
The original card in there was NVIDIA GeForce GT720 2GB. So the new card really isn't a huge step better.

EveryNameIsTaken · Mar 2, 2017

chemmajorp53 :

This one does need a 6 pin. Hence needing to get a new PSU. I had a 400w on hand but it didn't have a 6 pin so I needed to get one with it.

EveryNameIsTaken · Mar 3, 2017

Changing the BIOS from auto to pull from PCIE fixed it!

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