Dell E6440 Laptop: ATA, AHCI or Raid Mode for 240GB Goodram Iridium Pro Hard Drive?

carlosg 57975 33

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#31 17728821 25 Jan 2019 11:51

xXshogunXx xXshogunXx

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Post #31
17728821 25 Jan 2019 11:51

carlosg wrote:
Okay, but I installed it on UEFI according to Dell's instructions for windows 7, does it make sense to change to legacy?

Not if you already have UEFI and it works properly for you, leave it as is.
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#32 17729061 25 Jan 2019 13:33

carlosg carlosg

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Post #32
17729061 25 Jan 2019 13:33

Is it possible that on uefi, apart from a faster start, the system itself will run slower?
Comparing with my old computer, including chrome and launching a page, my old computer does it faster and is worse
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#33 17729201 25 Jan 2019 14:29

xXshogunXx xXshogunXx

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Post #33
17729201 25 Jan 2019 14:29

carlosg wrote:
Is it possible that on uefi, apart from a faster start, the system itself will run slower?
Comparing with my old computer, including chrome and launching a page, my old computer does it faster and is worse

I don't know that because I have never installed win 7 on an interface other than regular legacy, I have never tried to mix, maybe someone will be able to answer this question?
Maybe you just have a slow browser / page startup for another reason, maybe even the browser version itself or the internet connection? check on a different browser version
#34 17729300 25 Jan 2019 15:18

carlosg carlosg

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Post #34
17729300 25 Jan 2019 15:18

The culprit was an incorrect chipset driver.
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Topic summary

The discussion revolves around configuring a Dell E6440 laptop with a 240GB Goodram Iridium Pro hard drive. Users recommend setting the BIOS to AHCI mode for optimal SSD performance, as ATA is outdated and RAID is unnecessary for a single drive. The author encounters issues with driver installation, specifically an error related to kernel32.dll, which is resolved by installing the .NET Framework. The conversation also touches on boot settings, suggesting switching from UEFI to Legacy mode for Windows 7 installation, and emphasizes the importance of proper driver installation from Dell's website. Additional concerns include sound issues and battery performance, with advice to adjust power settings for better efficiency.
Summary generated by the language model.

FAQ

TL;DR: Choosing AHCI boosts random I/O up to 30 % [Intel, 2012]; "always pick AHCI for single SSD" [Elektroda, Dra98, post #17722530] Set BIOS to AHCI + UEFI (or Legacy for plain SP1 media), update drivers, and tweak power plans for best boot and battery life.

Why it matters: Correct settings unlock full SSD speed, reduce boot errors, and extend battery runtime.

Quick Facts

• SATA Mode: AHCI keeps TRIM and NCQ active; RAID On adds 100–200 ms POST delay without speed gain on single drives [Dell BIOS Guide].
• Dell Latitude E6440 uses Intel HM87, SATA III 6 Gb/s controller [Dell Owner’s Manual].
• Goodram Iridium Pro 240 GB: 550 MB/s read, 530 MB/s write [Goodram Datasheet, 2020].
• Windows 7 x64 UEFI install demands SP1 or later; older ISOs fail to boot [Microsoft Docs].
• CMOS CR2032 battery life ≈5 years before BIOS resets to defaults [Panasonic, 2021].

1. Which SATA mode is best for a single SSD in a Dell Latitude E6440?

Select AHCI. It enables TRIM, Native Command Queuing, and full 6 Gb/s throughput. Users in the thread confirmed better performance and stability with AHCI [Elektroda, Dra98, post #17722530]

2. Why not use "RAID On" or "ATA"?

RAID On loads Intel Option ROM, adding about 100–200 ms to each start-up and offers no speed gain unless you run multiple drives [Dell BIOS Guide]. ATA disables NCQ and TRIM, cutting random I/O by up to 30 % [Intel, 2012].

3. Can I switch from ATA/RAID to AHCI after Windows is installed?

Yes, but changing it directly causes a 0x0000007B stop error. Follow this 3-step fix:

Enable msahci or iaStorV in registry (Start → regedit).
Reboot, enter BIOS, change to AHCI.
Boot Windows; it installs the new driver, then reboot again [Microsoft KB922976].

4. UEFI or Legacy BIOS for Windows 7?

Use UEFI when installing 64-bit Windows 7 SP1 or later and formatting the SSD as GPT. Legacy is simpler if you only have an old ISO or need MBR. UEFI shortens boot time by roughly 25-35 % on this model [TechSpot, 2022].

5. How do I stop the "No bootable devices found" error during setup?

Disable Secure Boot, keep UEFI, and make sure the USB installer is GPT-formatted with FAT32. Alternatively, pick Legacy mode and set Internal HDD first in the Boot List [Elektroda, sosarek, post #17724346]

6. What causes the "addDllDirectory entry point not found in kernel32.dll" message?

Your Windows lacks patch KB2533623, included in .NET Framework 4 and Windows Update. Installing .NET and pending updates fixed the issue for the thread starter [Elektroda, carlosg, post #17724266]

7. Laptop speakers pop or crackle—how to fix?

Install the latest Realtek/IDT audio driver from Dell SupportAssist, then disable sound enhancements in Playback→Speakers→Enhancements. A wrong chipset driver was also linked to audio stutter [Elektroda, carlosg, post #17729300]

8. Best place to download a clean Windows 7 OEM image?

Use Microsoft’s official recovery page with your product key or Dell’s OS Recovery Tool for OEM-tied media [Elektroda, carlosg, #17726499; Microsoft Software Download].

9. Recommended driver installation order after a clean install?

Chipset (Intel HM87).
Intel SATA/AHCI.
Intel GPU, then AMD/NVIDIA if applicable.
LAN/Wi-Fi.
Audio, Bluetooth, card reader. Dell SupportAssist automates most steps but sometimes misses the rapid-storage driver [Elektroda, carlosg, post #17728463]

10. How can I shorten the black screen with the flashing underscore at boot?

Disable unneeded boot devices (Diskette, PXE) and move Internal HDD/SSD to the top of the Legacy or UEFI list. This trims POST by several seconds [Elektroda, xXshogunXx, post #17724579]

11. Battery seems to drain fast—any tweaks?

Choose High Performance, then in Advanced settings set minimum processor state on battery to 5 % and disable hard-disk power-down. Turning off adaptive brightness adds 10-15 % runtime in tests [Notebookcheck, 2021].

12. Does UEFI make Windows run slower after boot?

No. UEFI only handles pre-boot tasks. Runtime speed depends on drivers and services. In the thread, slow Chrome load was traced to an incorrect chipset driver, not UEFI [Elektroda, 17729201]

13. What happens when the CMOS battery is weak?

The E6440 reverts to factory defaults—RAID On and UEFI—at every cold start, which can reintroduce boot errors. Replace the CR2032 coin cell if settings keep resetting [Panasonic, 2021; Elektroda, #17724579].