Leah Rowe
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---
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title: Dell OptiPlex 780 MT/USFF
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x-toc-enable: true
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...
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Libreboot is compatible with the Dell OptiPlex 780, of variants: MT and USFF.
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SFF and DT may be supported in a future revision. These instructions are
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identical both the MT and USFF variants.
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<div class="specs">
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<center>
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Dell OptiPlex 780
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</center>
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| ***Specifications*** | |
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|----------------------------|------------------------------------------------|
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| **Manufacturer** | Dell |
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| **Name** | OptiPlex 780 |
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| **Variants** | OptiPlex 780 MT, OptiPlex 780 USFF |
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| **Released** | 2009 |
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| **Chipset** | Intel X4X |
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| **CPU** | Core 2 Duo (e.g. E8400) |
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| **Graphics** | Discrete graphics card, or Intel HD Graphics model |
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| **Memory** | DDR3 DIMMs (max 16GB on MT 4x4GB, 8GB USFF 2x4GB) |
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| **Architecture** | x86\_64 |
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| **Original boot firmware** | Dell UEFI firmware |
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| **Intel ME/AMD PSP** | Present. Entire ME firmware can be removed. |
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| **Flash chip** | SOIC-16 and/or SOIC-8 8MiB (64Mbit) |
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```
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W+: Works without blobs;
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N: Doesn't work;
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W*: Works with blobs;
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U: Untested;
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P+: Partially works;
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P*: Partially works with blobs
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?: UNKNOWN AT THIS TIME
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```
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| ***Features*** | |
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|---------------------------------------------------|----|
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| **Internal flashing with original boot firmware** | W+ |
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| **Display (if Intel GPU)** | W+ |
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| **Display (discrete GPU, SeaBIOS payload only)** | W* |
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| **Audio** | W+ |
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| **RAM Init** | W+ |
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| ***Payloads supported*** | |
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|----------------------------|-----------|
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| **GRUB (libgfxinit only)** | Works |
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| **SeaBIOS** | Works |
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| **SeaBIOS with GRUB** | Works |
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</div>
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Introduction
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============
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**Unavailable in Libreboot 20240612 or earlier. You must [compile from
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source](../build/), or use a version newer than Libreboot 20240612.**
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Official information about the computer can be found here:
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<https://www.dell.com/support/manuals/en-uk/optiplex-7010-plus-small-ff/opti_7010_sff_plus_om/specifications-of-optiplex-small-form-factor-plus-7010?guid=guid-7c9f07ce-626e-44ca-be3a-a1fb036413f9&lang=en-us>
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Build ROM image from source
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---------------------------
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The build target, when building from source, is thus:
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./mk -b coreboot dell780mt_truncate_8mb
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./mk -b coreboot dell780mt_8mb
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./mk -b coreboot dell780usff_truncate_8mb
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./mk -b coreboot dell780usff_8mb
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The `_truncate` image is needed if you're flashing Libreboot internally from
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the original Dell firmware. Otherwise, you only need the regular images that
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lack `_truncate` in the file name.
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100% FREE
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=========
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This mainboard does not rely on any binary blobs in the flash. It is using
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the Intel X4X / ICH10 platform, same as on the already supported
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Gigabyte GA-G41M-ES2L mainboard.
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Installation
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============
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Set MAC address
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---------------
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This platform uses an Intel Flash Descriptor, and defines an Intel GbE NVM
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region. As such, release/build ROMs will contain the same MAC address. To
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change the MAC address, please read [nvmutil documentation](../install/nvmutil.md).
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WARNING about CPU/GPU compatibility
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-------------------------------
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Coreboot has libre initialisation code for Intel graphics, but libre
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initialisation code is not available for most graphics cards. This machine can
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take any graphics card that fits in the PCI-E slot. When a graphics card is
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used, SeaBIOS executes its VGA ROM which provides video init, instead of
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coreboot's native Intel video init. GRUB piggybacks off of what SeaBIOS did,
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so the GRUB payload will also work.
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Flash a ROM image (software)
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-----------------
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**Always make sure to dump a copy of the current flash first. ALSO: [make
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sure /dev/mem protection is disabled](devmem.md) for the flashing to work!**
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If you're already running Libreboot, and you don't have flash protection
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turned on, [internal flashing](../install/) is possible.
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If you have factory firmware (Dell), you can short the service jumper. It's a
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2-pin header located somewhere on the board (no photos available yet).
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With the service jumper set, all flash protections are disabled on the first
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6MB of the flash; the latter 2MB part is restricted. Because we are using an
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Intel Flash Descriptor on this board, the flash will be divided into these
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parts:
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* Intel Flash Descriptor (basic machine configuration)
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* Intel Gigabit Ethernet region (e.g. MAC address configuration)
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* BIOS region (contains coreboot)
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Before you can use the flash commands, please note that the `_truncate` images
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are 6MB in size, but they must be padded to 8MB. Normally a blank part of flash
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should ideally be all 0xFF, but here we do:
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dd if=/dev/zero of=2mb.bin bs=2M count=1
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cat libreboot6mb.rom 2mb.bin > libreboot.rom
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If you're not using the truncate images, you can ignore the above steps.
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The Flash Descriptor can be thought of more like a *partition table* for the
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flash, at least in our use-case scenario. The `_truncate` images configure
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the flash such that only the first 6MB is used, with the BIOS region ending
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at that limit; the upper 2MB is specified as the platform data region, in
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Libreboot's configuration. To flash it, do this:
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./flashprog -p internal --ifd -i fd -w libreboot.rom
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./flashprog -p internal --ifd -i gbe -w libreboot.rom
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./flashprog -p internal --ifd -i bios -w libreboot.rom
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It's very important to do this in the *exact* order as above, because
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the `--ifd` option references the *flashed* IFD, not the one in your image,
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so you must flash the IFD first.
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If you already have Libreboot running, and you don't have flash protection
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enabled, you can omit `--ifd -i REGION` from the flashprog command, and flash
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the full image; the one without `_truncate` in the file name uses all of the
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flash, with the BIOS region ending at the 8MB limit, so the BIOS region is
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therefore 2MB larger on those images.
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Flash a ROM image (hardware)
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-----------------
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For general information, please refer to [25xx NOR flash
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instructions](../install/spi.md) - that page refers to use of socketed flash.
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No photos yet available.
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@ -54,6 +54,7 @@ Desktops (AMD, Intel, x86)
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- [Acer G43T-AM3](acer_g43t-am3.md)
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- Apple iMac 5,2
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- [ASUS KCMA-D8 motherboard](kcma-d8.md)
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- [Dell OptiPlex 780 variants e.g. MT, USFF](dell780.md)
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- [Gigabyte GA-G41M-ES2L motherboard](ga-g41m-es2l.md)
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- Intel D510MO and D410PT motherboards
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- [Intel D945GCLF](d945gclf.md)
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