Dell S2721DS with Acer Aspire 5742G-584G75Mnkk.will it run QHD@75 Hz refresh rate on the HDMI port

Delyrium
Delyrium Member Posts: 7

Tinkerer

edited January 24 in Aspire Laptops

Hello.

I have a question regarding conecting a new monitor to my system.

I have an Acer Aspire 5742G-584G75Mnkk that I want to connect it to a Dell S2721DS and my question is will it run QHD@75 Hz refresh rate on the HDMI port that the laptop has??

I saw some debates that it might only work via the display port, which this laptop doesn't have.

Can you please help me with this issue?

Thank you!!

Best regards!

[Edited the thread to add issue detail]

Answers

  • JackE
    JackE ACE Posts: 44,862 Trailblazer

    Sorry no. It might yield 75Hz at FHD 1080P resolution. But the maximum guaranteed is 60Hz on the specsheet for this model.

    Jack E/NJ

  • Delyrium
    Delyrium Member Posts: 7

    Tinkerer

    Hey. Thanks for the reply.

    I appreciate it. So, it's no chance i can run that at 1440p@75hz. But how come I can run 1440p on VGA and not on HDMI. That's pretty wild in my opinion. If i can run 1440p even it it's only 60hz it's still better than 1080p at least for a 27 inch display. 1080p with 27 inch displays is horrible, I've encountered some and they're not pretty at all. So, should i look for a 27 inch display that has VGA port right?

    Again thanks for the reply.

    Much appreciated!

  • JackE
    JackE ACE Posts: 44,862 Trailblazer

    Or a high-quality VGA-to-HDMI (analog-to-digital) signal converter. Should cost about $50usd.

    Jack E/NJ

  • Delyrium
    Delyrium Member Posts: 7

    Tinkerer

    edited February 15

    Thanks again for the reply.

    Well, I'm not such a big fan of those adaptors, i think i used some before in some different circumstances and had only issues with them.

    I found around here to buy a 24" Benq BL2420PT for around 200$ and it has a huge array of connectors, including VGA and HDMI. They say it's capable of 1440p, unfortunately only 60hz, but i kinda resigned of getting at least 75hz on 1440p..so, if the laptop handles 1440p on VGA I Think this monitor is a decent choice. I don't necessarily like it's 24", but it's more than enough for my needs.

  • JackE
    JackE ACE Posts: 44,862 Trailblazer

    Yeah. While their i/o connectors might be the same, cheap $10-20 passive video connector adapters are often confused with expensive $50-100 analog-to-digital video signal converters. But an active A2D converter is probably your only choice for newer larger-screen monitors with digital inputs only.

    A caveat. While 60Hz@MaxRez seems reasonable from 15yo PC & 10yo monitor designs, it might be inconsistent. Acer only specifies up to —- but doesn't guarantee — 60Hz@MaxRez in every situation.

    Jack E/NJ

  • Delyrium
    Delyrium Member Posts: 7

    Tinkerer

    If you have a certain model/brand of adapte, please feel free to share it here. Meanwhile, after doing a little bit of more research and did some measurements on my desk and setup, i think I'll ultimately go with a 24" inch monitor instead of a 27. But still i would like do go for one that supports 2k. I know that around 200$ i can find enough Full HD ones and for a 24" monitor it's enough, still i would like to go for the 2k ones, cose i also do a lot of work with numbers, graphs, also part time designer, but in the area of engineering, working with SoldiWorks and CAD software so that's why it's important for me a 2k display.

    Also, forgot to mention, I've upgraded the cpu long time ago to a i7 640m, the last supported for this laptop model, but i think the integrated gpu is the same as for the original model, so i don't think it will make any difference from the monitor stand point.

  • JackE
    JackE ACE Posts: 44,862 Trailblazer

    Yes, the dGPU chip should be soldered. And i7 iGPU about the same performance. So overall video performance shouldn't change much.

    Don't have any specific recommendations on a converter. Mainly because you're hoping to do an A2D conversion with virtually 100% efficiency. Frankly, I doubt that even the 24" BenQ's own built-in converter can process the PC's analog 2K@60Hz signal and digitally maintain 2K@60Hz. I think either resolution and/or frequency will suffer.

    A PC with more powerful graphics might be more practical for what you'd like to do. Sorry I can't be more positive.

    Jack E/NJ

  • Delyrium
    Delyrium Member Posts: 7

    Tinkerer

    Well, I'm looking to upgrade at some point, but for now i'll have to go with this old timer of a laptop, cose it has a 1tb samsung evo 860 ssd installed a couple of years ago, also maxxed the ram to 8GB and more so i've replaced that crappy fan with a more advanced but still kinda improvised one that does a better job at cooling..the only thing missing from the setup is a better monitor, even though i still run a 10+ year old LG 22" one, but i feel it's time to move to something more advanced. I'll continue my research and see what i can come across and start to test some monitors and adatpers and when i'll have a definitve option i'll check in with the info.

    Thanks a lot for the help so far and hopefully we'll get in touch again soon.

  • JackE
    JackE ACE Posts: 44,862 Trailblazer

    OK. Good luck. Let us know if you find a reasonably-priced combo that'll yield anything close to 2K@60Hz in a decent screen size.

    Jack E/NJ

  • Delyrium
    Delyrium Member Posts: 7

    Tinkerer

    After another round of quick research, I found the HP 24MQ which it says it runs QHD@60Hz and also 2 models that run WUXGA@60Hz: PHILIPS 252B9 and ASUS ProArt PA248QV. These last 2 are 16:10, which my current LG is also, so I'm familiar with this aspect ratio and I'm quite used to it. Now, I'm going to do some further research on the ASUS ProArt one cose i remember coming across some very good reviews, but were for the 27 inch model. The Asus it's kinda in the same range as the Benq that i mentioned earlier, they're both in the "professional" line, also the ASUS is a more modern and newer display than the Benq is, so I might give it a try, cose it's available to buy around here.

    Regarding the HP and Philips models i just mentioned, both very renowned brands, just that there's very few information about these 2 models I've found and I'm a bit hesitant going forward with them, but i have em on my list anyways.

  • Delyrium
    Delyrium Member Posts: 7

    Tinkerer

    I managed to test the HP 24MQ and got it to run 1920x1200@60Hz on both VGA and HDMI cables, with the image being a bit more clearer using the HDMI, but not by a lot. In the end i gave it back, because i didn't like the colors it produced (no matter the settings i would go through), the buttons were poorly positioned for making all the settings and also the text no matter what settings i would do was still a bit fuzzy and kinda elongated. Maybe because i was using a 16:10 aspect ratio on a 16:9 screen, but that's what windows recommended, couldn't reach the advertised 2560x1440 that the monitor was capable of. Also if i wanted indeed to use 1920x1080 resolution (an indeed 16:9 aspect ratio) , the top and bottom of the screen had black lines even when selecting in the monitors settings the aspect ratio - fit to screen mode, nothing worked, that being another reason why i gave it back. Now I'm looking into the ASUS ProArt PA248QV, it currently has a decent price and if it runs at 1920x1200 as the HP did and has the color accuracy they advertised it, then it might be the right monitor for some of my needs.

    I'll be back with some info as soon as i get it and I'm done testing it.