Zitat von Joliet im Beitrag #16

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Based on the modded BIOS, I've made some pictures from important facts. As you can see in the picture with the drives, no SSD or HDD is shown (the OS is already installed). But in the picture with the Boot Sequence, all drives are available.

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Zitat

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The device manager shows an AHCI driver.
At the moment I don't know, in which mode the SSD runs. Do you have an idea?

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If you have connected the SSD to one of the AMD SATA ports, which have been set to "AHCI", everything is fine. You can verify it by checking the DeviceID of the listed "Standard AHCI 1.0 Serial ATA Controller" (right click onto it > "Properties" > "Details" > "Property" > "HardwareIDs"). It should be DEV_4391.
By the way: I do not recommend to install any AMD AHCI driver instead of the generic MS AHCI driver, because you may loose TRIM support by that.

Zitat

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And there is another problem. I cannot install the graphics-driver. I tried it few times but I've got always an failure. Maybe it has to do with the SSD-improvements I've made in WIN 7 Pro 64bit (Prefetch, Superfetch, swapfile, computer protection, windows search)?

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I don't think, that the problem has something to do with the SSD improvements.
Tip: Remove the listed device "AMD Radeon HD 8600 Series", which shows a yellow mark and look, what happens after the reboot.

Zitat von Joliet im Beitrag #18

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Ok, I found DEV_4391 in "Hardware-IDs".

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Zitat

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In the device manager i found in the driver details of the HD6800 also an error massage.

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Please check the HardwareIDs of both listed graphics adapters ("ATI Radeon HD 4200" and "AMD Radeon HD 6800 Series").
It seems very strange, that the Device Manager shows 2 different AMD/ATI graphics adapters.
Question: Are there really 2 different graphics adapters within your system?
If not, you should disable the "AMD Radeon HD 6800 Series".

Zitat von Joliet im Beitrag #20

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Yes, there are two different graphic units - HD4200 is an onboard-GPU and HD6800 an dedicated GPU. Maybe I should deactivate the Onboard-graphic and try to install the driver for the HD6800 again?

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Zitat von Joliet im Beitrag #22

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But now - with deactivated onboard-graphic - there is a difference: The driver seems to be working. I can choose the full resolution (1920*1200) and the monitor is reconized .

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Zitat

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By the way, can you evaluate the following graphic please? Is there a problem with my HDD?

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Yes, there may be a problem. I recommend to do a test by using the Samsung HDD diagnostic tool named "ES Tool" (>LINK<).