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Does Intel® Iris® Xe Graphics Have More Work-Items than Intel® UHD Graphics 620?

Content Type: Product Information & Documentation   |   Article ID: 000059718   |   Last Reviewed: 09/04/2024
Description Resolution Additional information

Environment

Operating System

Other Linux family*
Heterogeneous computing and Data Parallel C++; Intel UHD Graphics; Linux with OpenCL

Description

  • Does Intel® Iris® Xe Graphics have more work-items or threads than Intel® UHD Graphics?
  • Looking for the best Intel® Graphics to perform parallel computations.
  • Typing the command "clinfo" in Linux with OpenCL:

    Linux with OpenCL screenshot

Resolution

  • Intel Iris Xe Graphics has 96 Execution Units (EUs) or threads in total, four times more than the Intel UHD Graphics with 24.
  • The max work item sizes from the image above is a value of a property called CL_DEVICE_MAX_WORK_ITEM_SIZES from the OpenCL 2.1 specifications:

    Maximum number of work-items that can be specified in each dimension of the work-group to clEnqueueNDRangeKernel.
    Returns n size_t entries, where n is the value returned by the query for CL_DEVICE_MAX_WORK_ITEM_DIMENSIONS.
    The minimum value is (1, 1, 1) for devices that are not of type CL_DEVICE_TYPE_CUSTOM.

  • This does not mean that the machine can have 256*256*256 = 16777216 work-items in a workgroup and can execute 16777216 threads in parallel.
  • The CL_DEVICE_MAX_COMPUTE_UNITS property indicates that the machine has 24 Execution Units (EUs) in total.
  • Each thread is capable to execute in either SIMD8, SIMD16, or SIMD32 lanes, SIMD depends on kernel and how it was built by the compiler.
  • Each single EU has 7 hardware (HW) threads (for 6th Generation Intel graphics).
  • The theoretical max number of OpenCL threads for this platform is 24*7*32 = 5376.
  • It will be handled by 168 HW threads and given that any particular kernel is built using SIMD32 mode.

Additional information

The number of EUs for a specific product can be found on our graphics specifications page.

For example, 96 EU is seen in the Processor Graphics section for i7-11370H processor.

Related Products

This article applies to 131 products.
Intel® HD Graphics 5300 Other Graphics Intel® Arc™ A370M Graphics Intel® Arc™ B-Series Graphics Intel® HD Graphics 5500 Intel® UHD Graphics Family Intel® UHD Graphics for 11th Gen Intel® Processors Data Center GPU Intel® UHD Graphics 770 Intel® UHD Graphics 610 Intel® HD Graphics 6000 Intel® Graphics for Intel® Core™ Ultra processors (Series 2) Intel® UHD Graphics 630 Intel® UHD Graphics 710 Intel® Iris® Graphics 6100 Legacy Graphics Intel® Arc™ A770 Graphics (16GB) Intel® Arc™ Pro A60M Graphics Intel® UHD Graphics P750 Intel® Iris® Pro Graphics Family Intel® Arc™ A350M Graphics Intel® Data Center GPU Max 1100 Intel® Arc™ A-Series Graphics Intel® HD Graphics 505 Intel® Arc™ A570M Graphics Intel® Iris® Xe MAX Dedicated Graphics Family Intel® Iris® Pro Graphics 6200 Intel® Arc™ Pro A40 Graphics Intel® Arc™ Graphics Intel® Arc™ 140V GPU Intel® UHD Graphics 605 Intel® Iris® Plus Graphics 645 Radeon™ RX Vega M GH Graphics Intel® UHD Graphics for 10th Gen Intel® Processors Intel® Iris® Xe Dedicated Graphics Family Intel® Arc™ graphics for Intel® Core™ Ultra processors (Series 1) Intel® Arc™ 130V GPU Intel® Iris® Plus Graphics Family Intel® Arc™ Pro A30M Graphics Graphics Intel® Arc™ A530M Graphics Intel® Iris® Xe Graphics eligible Intel® UHD Graphics 615 Intel® Arc™ Pro A50 Graphics Intel® UHD Graphics 750 Intel® Arc™ A380 Graphics Intel® Graphics Intel® Data Center GPU Max Series Radeon™ RX Vega M GL Graphics Intel® Iris® Graphics Family Intel® Iris® Plus Graphics 655 Intel® UHD Graphics for 12th Gen Intel® Processors Intel® Data Center GPU Flex Series Intel® Arc™ Pro B-Series Graphics Intel® Iris® Xe Graphics Intel® HD Graphics Family Intel® UHD Graphics 620 Intel® Iris® Xe Graphics Family Intel® UHD Graphics 617 Intel® HD Graphics 510 Intel® Arc™ Pro A-Series Graphics Intel® Arc™ B570 Graphics Intel® Arc™ Pro A60 Graphics Intel® Arc™ A750 Graphics Intel® Arc™ Dedicated Graphics Family Processor Graphics Intel® Iris® Xe MAX Graphics Intel® UHD Graphics 730 Intel® Arc™ B580 Graphics Intel® Arc™ Pro Dedicated Graphics Family Intel® Arc™ A580 Graphics Intel® Arc™ A770 Graphics (8GB) Intel® HD Graphics for Previous Generation Intel® Processors Intel® HD Graphics 500 Intel® Graphics for Intel® Core™ Ultra processors (Series 1)

Discontinued Products

Intel® HD Graphics 4000 Graphics Drivers for Intel® 82845G Graphics Controller Graphics Drivers for Intel® Q43 Express Chipset Intel® HD Graphics 520 Graphics Drivers for Intel® 82865G Graphics and Memory Controller Hub (GMCH) Intel® Iris® Plus Graphics 640 Graphics Drivers for Mobile Intel® 915GM/GMS, 910GML Express Chipset Family Graphics Drivers for Intel® 82915G/82910GL Express Chipset Family Intel® HD Graphics 4200 Graphics Drivers for Mobile Intel® 965 Express Chipset Family Intel® HD Graphics 615 Intel® HD Graphics 630 Graphics Drivers for Mobile Intel® 4 Series Express Chipset Family Intel® HD Graphics 4400 Intel® HD Graphics 515 Graphics Drivers for Intel® Q35 Express Chipset Intel® Iris® Plus Graphics 650 Intel® Data Center GPU Flex 140 Intel® HD Graphics 4600 Intel® Graphics Media Accelerator 600 (Intel® GMA 600) Graphics Drivers for Intel® Q33 Express Chipset Graphics Drivers for Intel® 82Q963 Graphics and Memory Controller Hub (GMCH) Intel® Iris® Graphics 550 Graphics Drivers for Intel® 82945G Express Chipset Graphics Drivers for Intel® G41 Express Chipset Intel® HD Graphics P630 Intel® HD Graphics 610 Graphics Drivers for Intel® 82852/82855 Graphics Controller Family Graphics Drivers for Intel® Q45 Express Chipset Intel® Iris® Pro Graphics 5200 Intel® HD Graphics 2000 Intel® HD Graphics 2500 Graphics Drivers for Intel® G35 Express Chipset Graphics Drivers for Intel® G31 Express Chipset Intel® HD Graphics 530 Graphics Drivers for Intel® 82Q965 Graphics and Memory Controller Hub (GMCH) Intel® HD Graphics 3000 Intel® Data Center GPU Flex 170 Intel® HD Graphics 620 Graphics Drivers for Intel® 82810 Graphics and Memory Controller Hub (GMCH) Intel® Iris® Graphics 5100 Intel® Iris® Graphics 540 Graphics Drivers for Intel® B43 Express Chipset Graphics Drivers for Intel® G43 Express Chipset Graphics Drivers for Intel® G33 Express Chipset Graphics Drivers for Intel® G45 Express Chipset Intel® Graphics Media Accelerator 3600 Series Graphics Drivers for Intel® 82946GZ Graphics Controller Graphics Drivers for Intel® 82G965 Graphics and Memory Controller Hub (GMCH) Intel® HD Graphics 5000 Intel® Graphics Media Accelerator 3150 (Intel® GMA 3150) Graphics Drivers for Mobile Intel® 945GM Express Chipset Family Graphics Drivers for Intel® 82830M Graphics and Memory Controller Hub (GMCH) Intel® Iris® Pro Graphics 580 Intel® Graphics Media Accelerator 500 (Intel® GMA 500) Graphics Drivers for Intel® 82815 Graphics Controller

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