Help with electricity usage of monitor

Original post by Anonymous370

Hey

,

I'm trying to compare 2 24" monitors in terms of their electircity usage in particular (for a start atleast). So here they both hare:

https://www.amazon.co.uk/gp/product/B08GGDHQ99?ref=ppx_pt2_dt_b_prod_image
https://www.amazon.co.uk/gp/product/B07CP9DN99?pf_rd_r=SVJ7SRSHTPABCQC0M24K&pf_rd_p=6e878984-68d5-4fd2-b7b3-7bc79d9c8b60&pd_rd_r=033bfa17-c121-4695-a3d9-aeb83fdaecb2&pd_rd_w=XTqBY&pd_rd_wg=Qaf1m&ref_=pd_gw_unk

The first one is the one I bought (as it's VESA mountable) and it's apparently 45.7 kWh (searched wattage under the customer Q&A section). The second is what I planned at first butcancelled onand it's 20 watts. How do these two ocompare then ? 45.7kWh vs 20 W ??? :confused:

Aside, what do others think generally about which is the better one of the two ? WFH times...

Thnx :smile:

According to the product pages of both monitors, the HP uses 22W and the Dell uses 13W. This can be attributed to the higher peak brightness and refresh rate.

https://store.hp.com/UKStore/Merch/Product.aspx?id=2XN62AA&opt=ABU&sel=MTO&lang=en-GB&gclid=Cj0KCQjwvr6EBhDOARIsAPpqUPFA3HY9TzaHOslaabrbtVlz8vrrPWcezcR9U4hhp-JcsM6sH-wUs7QaAiqIEALw_wcB&gclsrc=aw.ds

https://www.dell.com/en-uk/shop/dell-24-monitor-s2421h/apd/210-axkr/monitors-monitor-accessories#techspecs_section

As for which is better, they're both relatively similar, cheap IPS monitors from respectable brands, so quality is probably going to be in the same ballpark. I would vote for the HP for the same reasons it draws more power- higher brightness means better visibility in bright sunlight and potentially a more contrasty image, and while the different between 60Hz and 75Hz refresh rate doesn't make a great deal of difference, it never hurts to have more, especially if you're going to be doing any gaming.

Reply 2

OP

Thanks

. Appreciate the info. It'll be used for WFH only purposes for the majority of the time so should be fine. I find my current monitor (HP 22w) to be enough good for me for its brightness and contrast, which are 250 cd/m² (or "nits" as they call it from what appears so) and 1000:1. It turns out the Dell 24" monitor above that I bought matches this exactly so should be fine. The HP one is 50 nits higher for brightness (300 nits) and same for the contrast (1000:1).

Reply 3

Original post by Anonymous370

Thanks

. Appreciate the info. It'll be used for WFH only purposes for the majority of the time so should be fine. I find my current monitor (HP 22w) to be enough good for me for its brightness and contrast, which are 250 cd/m² (or "nits" as they call it from what appears so) and 1000:1. It turns out the Dell 24" monitor above that I bought matches this exactly so should be fine. The HP one is 50 nits higher for brightness (300 nits) and same for the contrast (1000:1).

If you haven't already bought and fancy saving yourself a few quid, I've just stumbled across this Asus monitor that ticks all the boxes to make it the best of both worlds from your original choices- 1080p IPS with the 250 nits and 75Hz of the HP while using less power at approx 17W, while also having VESA mounting from the VESA mounting of the Dell, with enough savings for a monitor arm without exceeding the original budget. It's even got USB passthrough, essentially letting the monitor act as a USB hub. It's a cracking deal at £99.

https://www.cclonline.com/product/asus-va24dqlb-monitor-23-8-inch-1920-x-1080-full-hd-ips-panel-amd-freesync-black-90lm0541-b01370-338982/?siteID=hL3Qp0zRBOc-j34SgUKvhf9tQSNqC85MmA

(edited 2 years ago)

Reply 4

OP

Universities Forum Helper

Well the Dell one I went for has already been dispatched (besides it'll be on the company, not my wallet) and it has got built in speakers too which I found interesting as well as two HDMI ports.

That Asus monitor for its price, 24" and VESA mountable does seem interesting. USB passthrough ? Huh ? How many USB ports is this out of interest ? Or does a dock go into that one port and the anything on that dock is same as if that dock was connected to the laptop instead ? I wonder.

Reply 5

mnot

20

Original post by Anonymous370

Hey

,

I'm trying to compare 2 24" monitors in terms of their electircity usage in particular (for a start atleast). So here they both hare:

https://www.amazon.co.uk/gp/product/B08GGDHQ99?ref=ppx_pt2_dt_b_prod_image
https://www.amazon.co.uk/gp/product/B07CP9DN99?pf_rd_r=SVJ7SRSHTPABCQC0M24K&pf_rd_p=6e878984-68d5-4fd2-b7b3-7bc79d9c8b60&pd_rd_r=033bfa17-c121-4695-a3d9-aeb83fdaecb2&pd_rd_w=XTqBY&pd_rd_wg=Qaf1m&ref_=pd_gw_unk

The first one is the one I bought (as it's VESA mountable) and it's apparently 45.7 kWh (searched wattage under the customer Q&A section). The second is what I planned at first butcancelled onand it's 20 watts. How do these two ocompare then ? 45.7kWh vs 20 W ??? :confused:

Aside, what do others think generally about which is the better one of the two ? WFH times...

Thnx :smile:

You can’t compare kWh & W.
kWh is a measure of energy, essentially the integral of power with respect to time.

W is power, if you knew the time interval in which 45.7 kWh was accrued you could find the average power output and compare that though.

Reply 6

Original post by Anonymous370

Well the Dell one I went for has already been dispatched (besides it'll be on the company, not my wallet) and it has got built in speakers too which I found interesting as well as two HDMI ports.

That Asus monitor for its price, 24" and VESA mountable does seem interesting. USB passthrough ? Huh ? How many USB ports is this out of interest ? Or does a dock go into that one port and the anything on that dock is same as if that dock was connected to the laptop instead ? I wonder.

You connect the monitor to the PC using one USB port, then you have two USB ports in the monitor's I/O. The monitor effectively has a built in two port USB hub.

Reply 7

OP

Original post by mnot

You can’t compare kWh & W.
kWh is a measure of energy, essentially the integral of power with respect to time.

W is power, if you knew the time interval in which 45.7 kWh was accrued you could find the average power output and compare that though.

Yeah, thought so too. W is energy per second flow, whereas kWh is an amount of energy, rather than a rate of energy flow.

Reply 8

OP

Isn't laptop connected to monitor by HDMI port though ? I/O of monitor ?

Reply 9

Universities Forum Helper

Original post by Anonymous370

Isn't laptop connected to monitor by HDMI port though ? I/O of monitor ?

It has USB ports in addition to the standard HDMI/DP/VGA ports. So you would still use a standard display port for video connection, for example HDMI, but it also has USB ports for that additional functionality of acting like a USB hub.

I/O= input/output, the selection of ports on the monitor.

(edited 2 years ago)

Reply 10

mnot

20

Original post by Anonymous370

Yeah, thought so too. W is energy per second flow, whereas kWh is an amount of energy, rather than a rate of energy flow.

Watts is power and yes it is a measure of energy transfer, and kWh is a measure of total energy.

Its a bit like a river, power is the speed of the flow & energy is the volume of water.

Reply 11

OP