Tesla K20m and TCC mode

Hello,

I’m trying to get a Tesla K20m working in Windows 7 x64 in TCC mode. It appears to work ok in WDDM mode but not TCC mode. The Windows driver is loading ok, nvidia-smi.exe output is shown below.
But deviceQuery always returns

cudaGetDeviceCount returned 30
-> unknown error
Result = FAIL

==============NVSMI LOG==============

Timestamp : Thu Jan 30 20:43:39 2014
Driver Version : 332.21

Attached GPUs : 1
GPU 0000:03:00.0
Product Name : Tesla K20m
Display Mode : Disabled
Display Active : Disabled
Persistence Mode : N/A
Accounting Mode : Disabled
Accounting Mode Buffer Size : 128
Driver Model
Current : TCC
Pending : TCC
Serial Number : 0324712062715
GPU UUID : GPU-18c12d74-9ca1-ff95-7f2a-0a5fb1859751
Minor Number : N/A
VBIOS Version : 80.10.11.00.0B
Inforom Version
Image Version : 2081.0208.01.07
OEM Object : 1.1
ECC Object : 3.0
Power Management Object : N/A
GPU Operation Mode
Current : All On
Pending : All On
PCI
Bus : 0x03
Device : 0x00
Domain : 0x0000
Device Id : 0x102810DE
Bus Id : 0000:03:00.0
Sub System Id : 0x101510DE
GPU Link Info
PCIe Generation
Max : 2
Current : 1
Link Width
Max : 16x
Current : 16x
Bridge Chip
Type : N/A
Firmware : N/A
Fan Speed : N/A
Performance State : P8
Clocks Throttle Reasons
Idle : Active
Applications Clocks Setting : Not Active
SW Power Cap : Not Active
HW Slowdown : Not Active
Unknown : Not Active
FB Memory Usage
Total : 4799 MiB
Used : 12 MiB
Free : 4787 MiB
BAR1 Memory Usage
Total : 256 MiB
Used : 2 MiB
Free : 254 MiB
Compute Mode : Default
Utilization
Gpu : 0 %
Memory : 0 %
Ecc Mode
Current : Enabled
Pending : Enabled
ECC Errors
Volatile
Single Bit
Device Memory : 0
Register File : 0
L1 Cache : 0
L2 Cache : 0
Texture Memory : 0
Total : 0
Double Bit
Device Memory : 0
Register File : 0
L1 Cache : 0
L2 Cache : 0
Texture Memory : 0
Total : 0
Aggregate
Single Bit
Device Memory : 0
Register File : 0
L1 Cache : 0
L2 Cache : 0
Texture Memory : 0
Total : 0
Double Bit
Device Memory : 0
Register File : 0
L1 Cache : 0
L2 Cache : 0
Texture Memory : 0
Total : 0
Retired Pages
Single Bit ECC : 0
Double Bit ECC : 0
Pending : No
Temperature
Gpu : 42 C
Power Readings
Power Management : Supported
Power Draw : 13.63 W
Power Limit : 225.00 W
Default Power Limit : 225.00 W
Enforced Power Limit : 225.00 W
Min Power Limit : 150.00 W
Max Power Limit : 225.00 W
Clocks
Graphics : 324 MHz
SM : 324 MHz
Memory : 324 MHz
Applications Clocks
Graphics : 705 MHz
Memory : 2600 MHz
Default Applications Clocks
Graphics : 705 MHz
Memory : 2600 MHz
Max Clocks
Graphics : 758 MHz
SM : 758 MHz
Memory : 2600 MHz
Compute Processes : None

Any suggestions?

LordLucan

I experience the similar problem, Only reboot would fix the problem
However it’s keep on getting back every couple hours

S

Try a newer driver.