Windows 7 lag when using dual monitors with different refresh rates

I have recently installed Windows 7 Ultimate x64 with Service Pack 1, coming from Vista (in which I had no problems). After the installation, the first thing I did was install the graphics card driver for my AMD Radeon HD 6870 1GB card. I then noticed that when I drag windows around the desktop, scroll through windows, and especially drag windows from the secondary monitor to the primary, there was very noticeable lag. However, there was no lag in games – just the Windows desktop and its windows. This was a completely fresh install. I have dual monitors – the primary is a 19″ widescreen Acer X191W, and the secondary is a 15″ Sony LCD. I am using them in extended desktop mode.

What happened at first was Windows locked the primary monitor to 75Hz, and would not let me change it to 60Hz.  For some reason the first time I installed the video drivers, I think there was a conflict with the default Windows display drivers, causing my main monitor to be stuck at 75Hz. I had to uninstall and wipe the display driver to reinstall it, after which the option to set it to 60Hz appeared. I used ATIMAN Uninstaller to wipe the driver. After setting the display to 60Hz, the lag disappeared completely.

So it seemed there was a conflict somewhere with my specific hardware configuration that caused lag when two monitors were set to different refresh rates. However, then I tried to recreate the problem on a different system. This system has a Radeon HD 4870 and different dual displays. It had the same problem when one of the monitors was set to refresh at 60Hz and the other at 75Hz. And again, putting them both to 60Hz resolved the lag issue.

I could not find any information about this issue online. It can’t be the monitors as between the two systems there were four different monitors that had the same problem. It can’t be the hardware, because my computer has a 6870 and the other has a 4870. It can’t be interfering software, as this was a clean install of Windows. It has to be either the AMD driver, or an issue with Windows.

The point of this post is to let people know how to fix this issue, as well as ask if anyone else has experienced this, especially with a different graphics card. It took me two weeks to find the cause of this. I haven’t found anyone online with this issue. Both the video cards I tested should handle different refresh rates without a problem. Although I have fixed the issue, I still want to know what caused it.

Sticker Mule Review

Have you ever wanted to get some custom stickers made for your website, business, band, or any other reason for which you might make a sticker? There are plenty of sticker companies on the internet to choose from, but a lot of these sticker companies require huge bulk orders of a thousand stickers or more. However, there is one company that lets you buy just the right amount of custom stickers, at a reasonable price, with great service. This company is Sticker Mule.

Sticker Mule, first of all, has a very good looking and easy to use website. Second, they are now the official sticker provider of Reddit. They offer free shipping on all orders, and have many different types of stickers to choose from. Your stickers can be different shapes, die cut, kiss cut, bumper stickers, sticker sheets, and even custom iPhone, iPad, iPod, Kindle, and Macbook laptop skins. For this review, I ordered some Reddit stickers, as well as a 50 pack of custom die cut stickers.

Choosing the type of sticker that I wanted was easy, due to the awesome website layout. For the custom stickers, I uploaded a PSD file, wrote a comment to let them know how I wanted it cut, and the next day I got a proof in my email showing exactly how the sticker would look if it was cut that way. I accepted the proof, and got a shipping time estimate for 13 days. After 7 days, I got an email with a UPS tracking number saying my order had shipped. It arrived on the 14th (and I had received my proof on the 1st) in a very sturdy envelope. Considering these were custom die cut stickers, in addition to the popular Reddit stickers, I think that this is a very reasonable time for order fulfillment and shipping.

I could tell right away that the stickers were printed on very high quality paper. They are not glossy, and have a very smooth matte surface. The sticker itself as well as the backing is relatively very thick, meaning you won’t accidentally bend the stickers or rip off a piece, such as the Reddit alien’s antenna. The resolution is superb, with no imperfections visible. There is no color bleed, and the colors were reproduced perfectly from the PSD I had uploaded. The cut was very clean and precise, and followed my outline exactly. I was very surprised at how heavy the stickers were due to the heavy duty paper used. According to the website, the stickers are fade and water resistant. This would take too long to test, but I have no doubts about this claim. In fact, I am going to put one of the Reddit stickers on my motorcycle helmet, which will be wet from rain periodically.

The photos of all the stickers can be seen below. I tried my best to reproduce the colors, and I think the photos come close, but they are not exact. The imperfections visible in the photos are not visible when actually looking at the stickers, even if looking closely. The camera shows things that you won’t be able to see with your eyes, so try to ignore that. Apart from that, as you can see in the photos, the ink quality is amazing. I am very satisfied with my order, and if I need some more stickers I will definitely order from Sticker Mule. The prices are reasonable due to the high quality, and if you are trying to spread your brand with stickers, these will definitely do the job very well. I highly recommend Sticker Mule for all your custom sticker needs, as well as for Reddit stickers. These are awesome stickers with superb quality. Check out the photos below.

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