Unable To Upgrade From 4870 To 6850?

Jul 25, 2012

Today I installed hd6850.I did a clean install with use of Driver Fusion(ex driver sweeper)And Im getting atikmdag.sys bsod when booting.I searched for atikmdag.sys in windows folder, and found 9 atikmdag.sys and 2 atikmdag.sys.mui. [URL] Can I delete this files, when doing clean install? An after cleaning with DF Im still having a lot of files wich begins with ati...sys(ATi technologies). Are they safe to delete. Im thinking, probably not. Or can I ,but not ones in amd64_microsoft-windows-w..ationservice .... folders?

This is minidump report:

[URL]

I know there are a lot of solutions on the net but nothing worked.I will try different version of drivers. But first wil try clean install with drivers only, without CCC. One guy did a extended research, and found aou that, without CCC, there is no BSOD.

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ATI Radeon 4870 Drivers

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i have Windows 7 ultimate x64 and the drivers to run my ATI Radeon 4870 work and have already been installed when i switched to windows 7 from windows vista.

I try to download the control center where i can overclock and change settings for my PC and whenever they start to install i get the blue screen and my comp restarts... What can i do?

p.s i did go to windows 7 x64 on the drivers list on the ATI wedsite and didn't accidentally click another OS

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Dec 7, 2009

I put together a rig not too long ago and have been playing a few games with it and recently have had some major issues with the Asus ATI Radeon HD 4870 card.

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Initially I thought it was a power issue so I upgraded from a 550w to 850w PSU. No good. I updated the video drivers to the newest ones as of 11/26/09 and still have issues. I updated the bios just incase. Still no dice.

I am almost positive that it is a graphics card issue of some sort because I put in my older Nvidia 7600 GT OC and it runs the games almost perfectly but I can't max everything out like I could on the HD 4870.

Anyone have any ideas of what it could be or what I can try to get this thing working?

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May 8, 2009

I am experiencing a very disturbing issue with my newly installed ATI 4870 and my Windows 7 RC (7100). Prior to installing this card I had the following setup, which worked flawlessly.

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intel p35 chipset in the motherboard

Samsung a656 40" LCD connected via a DVI to vga connector.

When I got my 4870, I uninstalled the nvidia drivers,rebooted, installed the latest (9.5) ati drivers and rebooted.

Then, I got a no signal in the monitor at the windows login screen.

Mind you, that when I (dual) boot in Vista, using the 9.4 drivers, everything is fine.

Things that I tried:

1. Creating a new monitor.inf file (located at the windows folder) using info from a post in this forum.- This should not make a difference, since I was using the same monitor.inf file in the same windows 7 installation, whitout any issues before I installed the 4870.
2. Changing the ATI .inf file to include only one resolution for the r7x cards 19 20 10 80 00 00 00 60- I think it sould be a refresh rate issue, since the vga port of the TV supports many resolutions, including 1600x1200 etc.

- It could also be an unsupported resolution, if the ATi driver cannot detect the monitor correctly.
3. Installing the windows 7 default ATI driver.

Things that I noticed:

1. I can login only in safe mode.

2. Low res mode (640x480) gets me to the login in screen, but as soon as I input my passowrd, I get no signal.

3. Changing DVI ports in the 4870 (it has 2)

Does anyone have any ideas?

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I've got a machine that bluescreened yesterday while putting a new XFX 6850 through its paces. Machine had been back up about an hour, I'd installed latest AMD drivers, ran OCCT's GPU stress test on error check mode for half an hour or so without issue, and then was running Unigine's Heaven DX11 benchmark tool on loop to check out performance & noise/thermals. I returned with some food 30 min later to find the machine BSOD'ed. Tried for about an hour to replicate the BSOD without it recurring.

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Intel i3 540 @ 3.67ghz (160 bclk)
2x OCZ3G1333LV2G @ 1280mhz 9/9/9/20 tRFC 88 2T
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I've got a few other computers I can test the card in, just trying to track down any other potential causes first.

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i think if i can default k-lite mpg2 codecs for windows my problem will be solve. waiting for your answers thanks see this link too : Asus Ati 4870 1gb mpg2 video files problem.

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