I would like the upgrade the power supply on a HP 750-175se. Suggestions? (to 750W)

[Dreamer-Newburg]

I would like the upgrade the power supply on a HP 750-175se, for a new graphics card.   Suggestions? (to 750W)

[itsmyname]

@Dreamer-Newburg -- is this your computer: HP ENVY 750-175se CTO Desktop PC product specifications and configurable options | HP® Customer Supp...

Did you select the 300 watt or the 500 watt power-supply on your CTO ("Configured To Order") model?

Did you choose the Intel Core i7-6700 (Skylake) (65 W) 3.4 GHz processor or the Intel Core i7-6700K (Skylake) (95 W) 4.0 GHz processor? 

So, if you have the 300 Watt power-supply, and the 95 Watt processor, the remaining wattage is 205 Watts. Of course, your motherboard, your CD/DVD, your disk-drive, and your USB ports will consume about 50 Watts, leaving about 150 Watts for any add-in graphics adapter.  However, 150 Watts is probably not enough for any "high-end" graphics adapter.  If you have the 500 Watt power-supply, you have about 350 Watts available. That should be enough power for many high-end graphic adapters, without the expense of purchasing a replacement power-supply.

I recommend that you take your computer to a local owner/operator computer store, and have them look at the current power-supply, and its various connectors, and to install a compatible power-supply.

[Dreamer-Newburg]

We have the 500 w supply.
Its the 4.0 Ghz processor.
We use this as a server for our camera security system.
Around 45 cameras.
Also have a couple of additional hard drives internally for video storage.
Current GPU is a NVIDIA GeForce GTX 960.
We need to upgrade the camera security software.  They recommend having a better graphics card.
I'd like to jump to a RTX 3060 or better, to future proof our setup.
Not sure if the current power supply will be adequate?

[itsmyname]

@Dreamer-Newburg -- Around 45 cameras.

Are the cameras powered by your computer, or independently?

Are the outputs from your camera connected to your computer, or to some other device, implying that the other device is connected to your computer?

> Also have a couple of additional hard drives internally for video storage.

My WDC 1 TB "spinning" disk-drive uses 6.6 Watts (12 Volts times 0.55 Amperes).

So, together, three such drives require less than 20 Watts.  Not much.

> Current GPU is a NVIDIA GeForce GTX 960.

This device's specifications indicate that it requires 120 Watts.

> They recommend having a better graphics card.

Can you ask them why? Your current video-card costs around $300. 

Its recommended Resolutions are:
640x480 (VGA)
1280x720  (High Definition)
1366x768
1600x900
1920x1080 (Full HD)
2560x1440
3840x2160 (not quite 4K resolution)

Is your display screen capable of the higher resolutions, to show clear pictures from each camera?

If not, then purchasing a "better" video-adapter is a waste of your money.  Instead, buy a better display screen, to exploit the current video-adapter's capabilities.

[Dreamer-Newburg]

Thanks for your feedback.
Good points and helpful.
I'll have to try and get a response about more specifics of the graphic card upgrade.
I appreciate your input.
Thanks!