OptiPlex 990 (SSF) - Using a AMD Radeon™ HD 6570? How about in Crossfire mode?

Question

Hi,

According to Dell specs http://i.dell.com/sites/content/shared-content/data-sheets/en/Documents/optiplex-990-tech-guide.pdf Page 21, the Small Form Factor Advanced provides 240 Watt.

According to http://www.anandtech.com/show/4263/amds-radeon-hd-6450-uvd3-meets-htpc/13 the Radeon 6450 and 6570 both use only 144 Watt. Which leaves almost 100 Watt left.

So I was thinking why not using a bigger graphic card like 6570 instead? Obviously the first limitation is that it needs also to be a low profile graphic card.

It seems AMD Radeon™ HD 6570 is the next bigger one and still available as Low Profile, which should fit in the OptiPlex 990 (SSF).

1) What I am more interested in is if I could use Cross fire by buying two of these graphic cards and run them on 240Watt? Has anyone tried that?

The wording on AMD Radeon site is not very clear: http://www.amd.com/us/products/desktop/graphics/amd-radeon-hd-6000/hd-6570/Pages/amd-radeon-hd-6570-overview.aspx#3

They claim "The operation of AMD CrossFireX™ technology in dual mode requires a second AMD Radeon™ HD 6670 graphics card and an AMD CrossFireX Ready motherboard. Note that AMD CrossFireX technology in greater than dual mode is not supported with AMD Radeon™ HD 6570 graphics products. "

2) Which makes little sense to me, why do I need a 6670 to run 6570 in a cross fire? Surely I should be able to use the same graphic card for it.

Helpful comments are welcome,

Many Thanks,

Houman

speedstep · Accepted Answer

While the 6570 supports crossfire the Optiplex 990 Motherboard IS NOT a AMD CrossFireX Ready motherboard. AMD CrossFireX™ technology requires an AMD CrossFireX Ready motherboard, an AMD CrossFireX™ Bridge Interconnect (for each additional graphics card) and may require a specialized power supply. AMD Radeon™ HD 6570 GPU Feature Summary 650 MHz engine clock 512MB-2GB DDR3 or 512MB-1GB GDDR5 memory 900 MHz (DDR3) or 1000 MHz (GDDR5) memory clock (1.8 Gbps DDR3 or 4.0 Gbps GDDR5) 28.8 GB/s (DDR3) or 64 GB/s (GDDR5) memory bandwidth 624 GFLOPS Single Precision compute power TeraScale 2 Unified Processing Architecture 480 Stream Processing Units 24 Texture Units 32 Z/Stencil ROP Units 8 Color ROP Units 128-bit DDR3/GDDR5 memory interface PCI Express 2.1 x16 bus interface DirectX® 11 support Shader Model 5.0 DirectCompute 11 Programmable hardware tessellation unit Accelerated multi-threading HDR texture compression Order-independent transparency OpenGL 4.1 support Image quality enhancement technology Up to 24x multi-sample and super-sample anti-aliasing modes Adaptive anti-aliasing Morphological anti-aliasing (MLAA) 16x angle independent anisotropic texture filtering 128-bit floating point HDR rendering AMD Eyefinity multi-display technology1 Native support for up to 4 simultaneous displays Independent resolutions, refresh rates, color controls, and video overlays Display grouping Combine multiple displays to behave like a single large display AMD App Acceleration2 OpenCL 1.1 DirectCompute 11 Accelerated video encoding, transcoding, and upscaling2,6 UVD 3 dedicated video playback accelerator MPEG-4 AVC/H.264 VC-1 MPEG-2 (SD & HD) Multi-View Codec (MVC) MPEG-4 part 2 (DivX, xVid) Adobe Flash Enhanced video quality features Advanced post-processing and scaling Dynamic contrast enhancement and color correction Brighter whites processing (blue stretch) Independent video gamma control Dynamic video range control Dual-stream HD (1080p) playback support DXVA 1.0 & 2.0 support AMD HD3D technology4 Stereoscopic 3D display/glasses support Blu-ray 3D support Stereoscopic 3D gaming 3rd party Stereoscopic 3D middleware software support AMD CrossFireX™ multi-GPU technology5 Dual GPU scaling Cutting-edge integrated display support DisplayPort 1.2 Max resolution: 3840x2400 Multi-Stream Transport 21.6 Gbps bandwidth High bit-rate audio HDMI 1.4a with Stereoscopic 3D Frame Packing Format, Deep Color, xvYCC wide gamut support, and high bit-rate audio Max resolution: 1920x1200 Dual-link DVI with HDCP Max resolution: 2560x1600 VGA Max resolution: 2048x1536 Integrated HD audio controller Output protected high bit rate 7.1 channel surround sound over HDMI or DisplayPort with no additional cables required Supports AC-3, AAC, Dolby TrueHD and DTS Master Audio formats AMD PowerPlay™ power management technology3 Dynamic power management with low power idle state AMD Catalyst™ software and HD video configuration software Unified graphics display drivers Certified for Windows 7, Windows Vista, and Windows XP AMD Catalyst™ Control Center Software application and user interface for setup, configuration, and accessing special features of AMD Radeon products.

Houmie75 · Answer

Sorry it seems I had this initially posted in the wrong category. Thanks for correction.

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OptiPlex 990 (SSF) - Using a AMD Radeon™ HD 6570? How about in Crossfire mode?

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