75hz Causing Blurry & Fuzzy Text at 1920 x 1080

[Salt_Lamp]

Hey everybody. I recently tried overclocking my H233H's refresh rate to 75hz for the improved experience while gaming. Unfortunately, my text becomes very blurry when I try to run my monitor at 1920 x 1080. Nothing unreadable, but still it's pretty annoying. Interestingly enough, if I zoom my monitor to 200% the problem goes away. Do I need to drop my resolution? If I have to sacrifice my resolution for hertz, I'd rather just go back to 60. By the way, I used the CRU tool made by ToastyX to make all the adjustments. Any help is much appreciated.

 

[Shaun o]

It`s more complicated than you think.

You see when your graphics card is connected to your monitor two things happen.
The card signals the monitor and asks what it`s maximum display resolution is, and the clock frequency for that resolution.
60 hz.

The card then stores the resolution table, and each Hz range the monitor reports.
Though I don`t know how you overclocked the monitor to 75hz.

Unless it was stored in the original handshake between the monitor and the graphics card.
The graphics card does not have the frequency value in hz along with the dot pitch. for the 75hz setting,and the blanking timings.for front porch and back porch timings also.

The result is the card does not sync with the monitor, and why the screen in blurry.

With Ati cards and the new crimson driver suite you can set up a new resolution and a hz range for it.
Along with the blanking timings and front porch, back porch timings.

So the video display clock of the graphics card is synchronized to the Hz range the monitor is set to.

To have a chance you need to know all of the timing values stated here.
And the terms used by name for each of the setting for there values.

You could pull up the specifications of the monitor and the settings via a google search.
If they have a technical manual or repair manual.
Simply put the brand name in and its model number found on the back of the monitor via the sticker.
It may even have the table on there. It`s a faff around though, and you can still break the monitor if you get it wrong.

 

[Salt_Lamp]

It`s more complicated than you think.

You see when your graphics card is connected to your monitor two things happen.
The card signals the monitor and asks what it`s maximum display resolution is, and the clock frequency for that resolution.
60 hz.

The card then stores the resolution table, and each Hz range the monitor reports.
Though I don`t know how you overclocked the monitor to 75hz.

Unless it was stored in the original handshake between the monitor and the graphics card.
The graphics card does not have the frequency value in hz along with the dot pitch. for the 75hz setting,and the blanking timings.for front porch and back porch timings also.

The result is the card does not sync with the monitor, and why the screen in blurry.

With Ati cards and the new crimson driver suite you can set up a new resolution and a hz range for it.
Along with the blanking timings and front porch, back porch timings.

So the video display clock of the graphics card is synchronized to the Hz range the monitor is set to.

To have a chance you need to know all of the timing values stated here.
And the terms used by name for each of the setting for there values.

You could pull up the specifications of the monitor and the settings via a google search.
If they have a technical manual or repair manual.
Simply put the brand name in and its model number found on the back of the monitor via the sticker.
It may even have the table on there. It`s a faff around though, and you can still break the monitor if you get it wrong.

Jeez, that's certainly a lot to take in. Thanks for providing all that info.

However, I'd just like to counter by saying that my monitor is in fact capable of 75hz at max resolution, based on its specifications. I should also mention that ANY increase above 60hz at 1920 x 1080 causes this text issue. Like I said previously though, if I zoom in to say 200% the text is crystal clear. What's up with that? Nothing else beyond that is affected by the increase in hertz. It's just the text. Could it be the cable?

I have an EVGA GTX 970 OC'd connected to my monitor via a standard DVI cable.

Just to throw this out there as well, but here's a link to a post from reddit about overclocking refresh rate and the top comment below the main post, username "attrition0", claims they were able to overclock their H233H monitor, (same monitor as mine), to 75hz without any adverse effects. Surely that means it's possible, right? As an aside, the OP's post is describing the exact problem I seem to be facing at this moment in regards to text, so that's worth checking out as well. It appears he solved it by dropping the resolution of his monitor. Something I'd rather not do unless absolutely necessary.

Here's the link: http://

In addition here are two guides I've been following that describe multiple methods on how to overclock your monitor to a higher refresh rate. Note that in the H233H's specifications it indicates the following: "V-Sync Rate at Max Res. 75Hz".

Guide 1: http://

Guide 2: http://

H233H Specs: http://

ToastyX's CRU Utility: http://

 

[Salt_Lamp]

Bump

 

[SinxarKnights]

here's a link to a post from reddit about overclocking refresh rate and the top comment below the main post, username "attrition0", claims they were able to overclock their H233H monitor, (same monitor as mine), to 75hz without any adverse effects.

I have an Acer H233H and used this method a while ago to get 1080p@75hz, it does make a difference. 15hz doesn't seem like a lot but it's a 25% improvement and in game it is noticeable if you're switching between 75hz and 60hz to compare.

That comment says nothing of the sort.

 

[Salt_Lamp]

That comment says nothing of the sort.

How so?

Also, would you happen to have any ideas on what might be causing my text problems? Any additional input is much appreciated.

Are the specifications listed on "cnet" incorrect, do you think?

 

[SinxarKnights]

You said he OC'ed the monitor to 75hz with no adverse effects. The comment does not say that, all it says is there is a difference, he did not say there were no adverse effects.

I would personally say the listed specs are false or refer to a different revision of the same monitor. I have an old acer that in the manual that came with it says it is 2048x1152 @ 75 hz. This is simply not the case, i've tried overclocking it and it fails at anything above 60.

In your case, it is listed at 75hz and you can get 75hz when you overclock it. it doesn't say anything about the image quality at 75hz. I noticed that it says " Six Lamps for Back Light", I am going to assume that this is CCFL bulbs. This could be causing the issue with the text but it is just a guess. My theory is the 60hz backlight has issues with a 75hz refresh rate that results in loss of fine detail.

 

[Salt_Lamp]

You said he OC'ed the monitor to 75hz with no adverse effects. The comment does not say that, all it says is there is a difference, he did not say there were no adverse effects.

I would personally say the listed specs are false or refer to a different revision of the same monitor. I have an old acer that in the manual that came with it says it is 2048x1152 @ 75 hz. This is simply not the case, i've tried overclocking it and it fails at anything above 60.

In your case, it is listed at 75hz and you can get 75hz when you overclock it. it doesn't say anything about the image quality at 75hz. I noticed that it says " Six Lamps for Back Light", I am going to assume that this is CCFL bulbs. This could be causing the issue with the text but it is just a guess. My theory is the 60hz backlight has issues with a 75hz refresh rate that results in loss of fine detail.

I see. This is what I was afraid of, sadly. Thanks for the detailed explanation and your time.

At this point, I guess I'll just go back to 60hz.

 

[SinxarKnights]

Just putting it out there that I do not actually know why it happens. Maybe somebody else will stop by and tell us what is happening.

 

[Salt_Lamp]

Just putting it out there that I do not actually know why it happens. Maybe somebody else will stop by and tell us what is happening.

You may be right, and I certainly don't want to eliminate the possibility. Although, based on what I've been able to gather, your initial description of what's going on here seems like the most likely scenario. As you said, it could simply just be the limitations of this specific monitor. It could even be that the problem might lay with my particular monitor (I should mention that it is in fact refurbished). It doesn't really matter in the end, since I was already leaning towards getting a new computer monitor anyway. Might as well splurge and make it 120hz/144hz.

As an aside, I've always been curious as to whether or not my 55 inch ST60 can display in 120hz. I've heard most TV manufacturers "claim" that their televisions can operate at a very high refresh rate, but in actuality that only applies to 3D content. Everything else is shown at 60hz, no matter what. Nonetheless, I have heard of ways to "overclock" a television like mine to 120hz, but would it really be "true" 120hz? Feel free to share your thoughts, if you'd like.