1. Computers
  2. Display Drivers
  3. Graphics Cards
  4. Memory
  5. Motherboards
  6. Processors
  7. Software
  8. Storage
  9. Operating Systems


Facebook RSS Twitter Twitter Google Plus


Phoronix Test Suite

OpenBenchmarking.org

AMD Radeon HD 4870 X2 On Linux

Michael Larabel

Published on 12 August 2008
Written by Michael Larabel
Page 2 of 2 - 17 Comments

With this initial support, however, you can expect a few caveats. Initially, this CrossFire implementation only supports the Radeon HD 4800 series (R700/RV770) but in the coming months the support will likely be added for the R600 series. In addition, only two GPUs are supported for CrossFire -- either a single graphics card with two GPUs like the HD 4870 X2 or using two Radeon HD 4850 graphics cards. Later on they may possibly add the four-GPU CrossFireX support. It's also important to keep in mind that invasive changes were required when adding this multi-GPU support, so don't be surprised if there are a few other issues. We'll talk more about the CrossFire support when the supported driver has been released.

There is no CrossFire support in any of the open-source ATI drivers for X.Org (xf86-video-ati and xf86-video-radeonhd) and don't expect it in the near future. Before any of the open-source developers are likely to work on the shared-rendering across multiple-GPUs support, first the kernel memory management (now mainly GEM) woes need to settle down, DRI2 returning to a pleasant state, and the Mesa 3D ATI component migrating to the Gallium3D framework for first delivering a reasonable level of performance. We also don't have any level of open-source 2D/3D R600/700 support quite yet. If you add in the current lack of (NDA-free) CrossFireX documentation and all of the other unmentioned prerequisites and items of higher priority, we would be surprised if there's an open-source CrossFire-supportive driver before 2010.

For those just interested in using one of the Radeon HD 4870 X2's GPUs with an open-source driver, you can do that today. The PCI ID for the Radeon HD 4870 X2 is 0x9441. This ID was committed to the xf86-video-ati master branch last night so if you check out the latest source-code and build the driver you can have this card up and running. The xf86-video-radeonhd driver had RV770 hard-coded support added while they are turning to the AtomBIOS abstraction layer. If adding the HD 4870 X2 PCI ID to the RadeonHD master driver, it will work with this Novell-produced driver. We expect the 0x9441 PCI ID though will be added to the RadeonHD driver very soon. However, due to the current lack of open-source R600/700 2D/3D/Video support, both drivers right now only provide mode-setting support with no hardware-based acceleration.

We will be sharing our Radeon HD 4870 X2 Linux results later this month as well as the Radeon HD 4850 and Radeon HD 4870 CrossFire test results from the Phoronix Test Suite.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
Latest Linux Hardware Reviews
  1. ASRock X99 Extreme3 Is An Affordable Choice For Linux Users
  2. A Walkthrough Of The New 32 System Open-Source Linux Benchmarking Test Farm
  3. Habey MITX-6771: Mini-ITX Board With Quad-Core J1900 Bay Trail
  4. OCZ Vector 150 SSD On Linux
Latest Linux Articles
  1. 17-Way Linux Graphics Card Comparison With Civilization Beyond Earth
  2. AMD Kaveri: Open-Source Radeon Gallium3D vs. Catalyst 14.12 Omega Driver
  3. 12-Way AMD Catalyst 14.12 vs. NVIDIA 346 Series Linux GPU Comparison
  4. AMD Catalyst 14.12 Omega Driver Brings Mixed Results For Linux Users
Latest Linux News
  1. Heterogeneous Memory Management Is Coming Along For The Linux Kernel
  2. NTP Is The Latest Project Struck By Security Issues
  3. LDC 0.15.1 Released For A D Compiler In LLVM
  4. Fedora Doesn't Yet Enable F2FS File-System Support
  5. XZ 5.2 Adds New Multi-Threaded Options
  6. Intel 2.99.917 X.Org Driver Released, 3.0 Release Finally Near
  7. Server-Side XCB Is Being Discussed For The X.Org Server
  8. Adreno A4xx Rendering With Freedreno Takes Shape
  9. Linux 3.19-rc1 Kernel Released Ahead Of Schedule
  10. X.Org Server 1.16.3 Released To Fix Security Issues
Latest Forum Discussions
  1. Need some hand holding with upgrading xserver
  2. Maker3D - create your 3D RPG
  3. FPS capped on Linux (AMD fglrx drivers)
  4. Looking for an nVidia GPU, but not sure how well they are supported.
  5. Speeding up systemd networking service
  6. Major Performance Breakthrough Discovered For Intel's Mesa Driver
  7. Are there an app using HSA ?
  8. The New SuperTuxKart Looks Better, But Can Cause GPU/Driver Problems