cancel
Showing results for 
Search instead for 
Did you mean: 

OpenCL

Highlighted
Journeyman III
Journeyman III

AMD OpenCL driver supports Intel's CPU products?

I own an AMD 4870x2 and an Intel Core2Duo E8600. I have the AMD Drivers version 12.1, the AMD APP SDK v2 and the Intel OpenCL 1.5 SDK installed.

As expected, OpenCL reports two platforms present. The Intel platform as expected reports a single device as expected. The AMD platform reports 3 devices.

The first two, devices 0 and 1 are ATI RV770's as expected.

Device 2 however is a bit of a curve ball. My Core2Duo. The CL_DEVICE_VENDOR string is "GenuineIntel".

I find it a bit questionable that AMD is shipping drivers for a competitors products, especially as they are quite crippled in comparison to the drivers Intel provide. From my testing on the Nvidia OpenCL devices, I have not encountered their drivers attempting to provide OpenCL devices for CPUs.

As there are OpenCL applications out in the wild that do not check that the CL_DEVICE_VENDOR string matches the CL_PLATFORM_VENDOR string, is there a method to disable the AMD OpenCL drivers attempts to support non-AMD devices?

0 Kudos
Reply
7 Replies
Highlighted
Journeyman III
Journeyman III

Re: AMD OpenCL driver supports Intel's CPU products?

The AMD SDK supports all x86 processors that have SSE 2.x + instructions. I think if you look through the documentation you will see it stated there. Intel CPUs work fine with AMDs SDK, although in my experience there is a speed difference. As far as I know there is no way to disable a device that is supported by the ICD.

0 Kudos
Reply
Highlighted
Journeyman III
Journeyman III

Re: AMD OpenCL driver supports Intel's CPU products?

You as the developer are the one who decides which platform and which device you use so if you are using a platform which is from a different manufactured than the device you are making that choice not AMD. You can clearly how to read the vendor ID and the platform ID so why would you not do this yourself if you are so concerned? You seem to have the answer yourself, simply check the vendor ID and then don't use that platform so you know how to do it, you have even looked into the problem but you are complaining that AMD has chosen to not restrict you to their hardware. I guess you can't win for loosing can you.

Intel is checking for support of SSE instruction version which is higher than AMD currently supports. They have clearly done this as a defendable way to not have their driver work on other platforms. They easily could have lowered the SSE requirement. It will be interesting as AMD is now going to support AVX instructions.

I have used the AMD driver in production with intel chips which are not supported by intel and it works just fine. As you can expect the performance is not as good as they do not optimize for hardware they do not make but it is still very good so you seem to be having concerns which are unfounded.

Since AMD is targeting X86 and SSE instructions which are common and well defined standards used everyday by multiple vendors and software developers I see little concern here. You have a choice and even if you didn't AMDs driver works just fine on Intel hardware.

I don't understand your comment "especially as they are quite crippled"

0 Kudos
Reply
Highlighted
Journeyman III
Journeyman III

Re: AMD OpenCL driver supports Intel's CPU products?

Will be the posibility HD3850 get Opencl support by adequate drivers?

0 Kudos
Reply
Highlighted
Exemplar
Exemplar

Re: AMD OpenCL driver supports Intel's CPU products?

radeon 3xxx have HW limitation which make them unable to run OpenCL code. so no support.

0 Kudos
Reply
Highlighted
Journeyman III
Journeyman III

Re: AMD OpenCL driver supports Intel's CPU products?

what kind of limitation would be? uvd+?

0 Kudos
Reply
Highlighted

Re: AMD OpenCL driver supports Intel's CPU products?

HD3XXX series does not support compute shader.

0 Kudos
Reply
Highlighted
Journeyman III
Journeyman III

Re: AMD OpenCL driver supports Intel's CPU products?

Oh of course, hd3850 has 320 stream processing units for shaders... it's perfectly compatible.

Radeon™ HD 3850 GPU

Pixel Pipelines

320 stream processing units* (Unified)

Vertex Engines

320 stream processing units* (Unified)

that's part of its spec

  • Powered by Radeon® HD 3800 GPU
  • 512MB(256bit) GDDR3 memory
  • Superscalar unified shader architecture
  • 320 stream processing units
  • 256-bit memory interface
  • DirectX® 10.1 / Shader Model 4.1 support
CHIPSET FEATURES
  • Superscalar unified shader architecture
  • 320 stream processing units
  • 256-bit memory interface
  • DirectX® 10.1 / Shader Model 4.1 support
  • Use up to four GPUs with an AMD 790FX based motherboard
  • High-speed 128-bit HDR (High Dynamic Range) rendering
  • Up to 24x Custom Filter Anti-Aliasing
  • 55nm process technology
  • ATI AvivoTM HD video and display technology
  • Built-in HDMI and 5.1 surround audio
  • Support for the ATI RadeonTM DVI to HDMI adapter
  • Unified Video Decoder (UVD) for Blu-rayTM and HD DVD
  • Dynamic geometry acceleration
  • Game physics processing capability

Il messaggio è stato modificato da: Morris spick

0 Kudos
Reply