Hello People,
I have a little problem to know if the GPUs GTX 750 (GM-107) and GTX 980 (GM204) are hybrid between Kepler and Maxwell? According I know Kepler architecture has Streaming Processor (SMX) with 192 CUDA cores and 48 Kb of Shared Memory! Maxwell architecture has Streaming Processor (SMM) with 128 CUDA cores and 64 Kb of Shared Memory! However when I run the program DeviceQuery of CUDA Toolkit the information that I get is very confuse!
I need to know if the GPUs where I am doing some experiments are hybrid between Maxwell and Kepler? Or that is a problem of the runtime or driver version??? I am copying the output of the DeviceQuery program of the Two GPUs! I have written in bold some importance differences between architectures!
amaris@marte:~$ ./deviceQuery/deviceQuery
./deviceQuery/deviceQuery Starting…
CUDA Device Query (Runtime API) version (CUDART static linking)
Detected 1 CUDA Capable device(s)
Device 0: “GeForce GTX 750”
CUDA Driver Version / Runtime Version 7.5 / 5.5
CUDA Capability Major/Minor version number: 5.0
Total amount of global memory: 1023 MBytes (1073020928 bytes)
MapSMtoCores for SM 5.0 is undefined. Default to use 192 Cores/SM
MapSMtoCores for SM 5.0 is undefined. Default to use 192 Cores/SM
( 4) Multiprocessors, (192) CUDA Cores/MP: 768 CUDA Cores
GPU Clock rate: 1110 MHz (1.11 GHz)
Memory Clock rate: 2505 Mhz
Memory Bus Width: 128-bit
L2 Cache Size: 2097152 bytes
Maximum Texture Dimension Size (x,y,z) 1D=(65536), 2D=(65536, 65536), 3D=(4096, 4096, 4096)
Maximum Layered 1D Texture Size, (num) layers 1D=(16384), 2048 layers
Maximum Layered 2D Texture Size, (num) layers 2D=(16384, 16384), 2048 layers
Total amount of constant memory: 65536 bytes
Total amount of shared memory per block: 49152 bytes
Total number of registers available per block: 65536
Warp size: 32
Maximum number of threads per multiprocessor: 2048
Maximum number of threads per block: 1024
Max dimension size of a thread block (x,y,z): (1024, 1024, 64)
Max dimension size of a grid size (x,y,z): (2147483647, 65535, 65535)
Maximum memory pitch: 2147483647 bytes
Texture alignment: 512 bytes
Concurrent copy and kernel execution: Yes with 1 copy engine(s)
Run time limit on kernels: No
Integrated GPU sharing Host Memory: No
Support host page-locked memory mapping: Yes
Alignment requirement for Surfaces: Yes
Device has ECC support: Disabled
Device supports Unified Addressing (UVA): Yes
Device PCI Bus ID / PCI location ID: 1 / 0
Compute Mode:
< Default (multiple host threads can use ::cudaSetDevice() with device simultaneously) >
deviceQuery, CUDA Driver = CUDART, CUDA Driver Version = 7.5, CUDA Runtime Version = 5.5, NumDevs = 1, Device0 = GeForce GTX 750
Result = PASS
amaris@marte:~$ lspci | grep NVIDI
01:00.0 VGA compatible controller: NVIDIA Corporation GM107 [GeForce GTX 750] (rev a2)
01:00.1 Audio device: NVIDIA Corporation Device 0fbc (rev a1)
amaris@venus:~$ ./deviceQuery/deviceQuery
./deviceQuery/deviceQuery Starting…
CUDA Device Query (Runtime API) version (CUDART static linking)
Detected 1 CUDA Capable device(s)
Device 0: “GeForce GTX 980”
CUDA Driver Version / Runtime Version 7.5 / 5.5
CUDA Capability Major/Minor version number: 5.2
Total amount of global memory: 4095 MBytes (4294246400 bytes)
MapSMtoCores for SM 5.2 is undefined. Default to use 192 Cores/SM
MapSMtoCores for SM 5.2 is undefined. Default to use 192 Cores/SM
(16) Multiprocessors, (192) CUDA Cores/MP: 3072 CUDA Cores
GPU Clock rate: 1216 MHz (1.22 GHz)
Memory Clock rate: 3505 Mhz
Memory Bus Width: 256-bit
L2 Cache Size: 2097152 bytes
Maximum Texture Dimension Size (x,y,z) 1D=(65536), 2D=(65536, 65536), 3D=(4096, 4096, 4096)
Maximum Layered 1D Texture Size, (num) layers 1D=(16384), 2048 layers
Maximum Layered 2D Texture Size, (num) layers 2D=(16384, 16384), 2048 layers
Total amount of constant memory: 65536 bytes
Total amount of shared memory per block: 49152 bytes
Total number of registers available per block: 65536
Warp size: 32
Maximum number of threads per multiprocessor: 2048
Maximum number of threads per block: 1024
Max dimension size of a thread block (x,y,z): (1024, 1024, 64)
Max dimension size of a grid size (x,y,z): (2147483647, 65535, 65535)
Maximum memory pitch: 2147483647 bytes
Texture alignment: 512 bytes
Concurrent copy and kernel execution: Yes with 2 copy engine(s)
Run time limit on kernels: No
Integrated GPU sharing Host Memory: No
Support host page-locked memory mapping: Yes
Alignment requirement for Surfaces: Yes
Device has ECC support: Disabled
Device supports Unified Addressing (UVA): Yes
Device PCI Bus ID / PCI location ID: 1 / 0
Compute Mode:
< Default (multiple host threads can use ::cudaSetDevice() with device simultaneously) >
deviceQuery, CUDA Driver = CUDART, CUDA Driver Version = 7.5, CUDA Runtime Version = 5.5, NumDevs = 1, Device0 = GeForce GTX 980
Result = PASS
amaris@venus:~$ lspci | grep NVIDIA
01:00.0 VGA compatible controller: NVIDIA Corporation GM204 [GeForce GTX 980] (rev a1)
01:00.1 Audio device: NVIDIA Corporation GM204 High Definition Audio Controller (rev a1)
amaris@venus:~$ ^C
amaris@venus:~$
I will be grateful if you can send me this information! Best regards,
-Marcos