Number of Copy Engines on Titan?

It’s fantastic that Titan has Tesla-class double-precision performance in a GeForce card, but does it also have two DMA copy engines? Could someone post the “deviceQuery” output for Titan?

I posed this question over on anandtech and here’s the answer:

1 copy engine. The full output of DeviceQuery is below.

CUDA Device Query (Runtime API) version (CUDART static linking)

Detected 1 CUDA Capable device(s)

Device 0: “GeForce GTX TITAN”
CUDA Driver Version / Runtime Version 5.0 / 5.0
CUDA Capability Major/Minor version number: 3.5
Total amount of global memory: 6144 MBytes (6442123264 bytes)
(14) Multiprocessors x (192) CUDA Cores/MP: 2688 CUDA Cores
GPU Clock rate: 876 MHz (0.88 GHz)
Memory Clock rate: 3004 Mhz
Memory Bus Width: 384-bit
L2 Cache Size: 1572864 bytes
Max Texture Dimension Size (x,y,z) 1D=(65536), 2D=(65536,65536), 3
Max Layered Texture Size (dim) x layers 1D=(16384) x 2048, 2D=(16384,16
384) x 2048
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
Maximum sizes of each dimension of a block: 1024 x 1024 x 64
Maximum sizes of each dimension of a grid: 2147483647 x 65535 x 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: Yes
Integrated GPU sharing Host Memory: No
Support host page-locked memory mapping: Yes
Alignment requirement for Surfaces: Yes
Device has ECC support: Disabled
CUDA Device Driver Mode (TCC or WDDM): WDDM (Windows Display Driver Mo
Device supports Unified Addressing (UVA): Yes
Device PCI Bus ID / PCI location ID: 3 / 0
Compute Mode:
< Default (multiple host threads can use ::cudaSetDevice() with device simu
ltaneously) >

deviceQuery, CUDA Driver = CUDART, CUDA Driver Version = 5.0, CUDA Runtime Versi
on = 5.0, NumDevs = 1, Device0 = GeForce GTX TITAN

Thanks for posting that. I am seriously tempted to get one of these.

I don’t suppose anyone knows whether this card will work in TCC mode? I am guessing not but it sure would be nice if it did!

Titan does not support TCC mode, or any of the other device switches that are fully supported in Tesla GPUs.