This is a follow up to my previous thread.
I have been having issues with the K20X maintaining peak performance. As it turns out (and with plenty of help from this forum), I have traced the issue back to the SW Power-Cap engaging. The problem being:
- The card is not overheating, it’s only at about 70C.
- The card is not even drawing too much power. The Power-Cap is activating at ~90W.
Further, the Power cap is rapidly fluctuating: the card is in power mode 0 for 1 second, then power mode 8 for 1 second, power mode 0 for 1 second etc etc.
==============NVSMI LOG==============
Timestamp : Thu Jan 31 08:13:01 2013
Driver Version : 310.90
Attached GPUs : 4
GPU 0000:02:00.0
Product Name : Tesla K20Xm
Display Mode : Disabled
Persistence Mode : N/A
Driver Model
Current : TCC
Pending : TCC
Serial Number : 0324912021549
GPU UUID : GPU-42b69f80-9af6-d385-18fd-f4fc8d55daff
VBIOS Version : 80.10.17.00.02
Inforom Version
Image Version : 2081.0200.01.09
OEM Object : 1.1
ECC Object : 3.0
Power Management Object : N/A
GPU Operation Mode
Current : Compute
Pending : Compute
PCI
Bus : 0x02
Device : 0x00
Domain : 0x0000
Device Id : 0x102110DE
Bus Id : 0000:02:00.0
Sub System Id : 0x097D10DE
GPU Link Info
PCIe Generation
Max : 2
Current : 2
Link Width
Max : 16x
Current : 8x
Fan Speed : N/A
Performance State : P0
Clocks Throttle Reasons
Idle : Not Active
User Defined Clocks : Active
SW Power Cap : Not Active
HW Slowdown : Not Active
Unknown : Not Active
Memory Usage
Total : 5759 MB
Used : 2246 MB
Free : 3513 MB
Compute Mode : Default
Utilization
Gpu : 0 %
Memory : 0 %
Ecc Mode
Current : Enabled
Pending : Disabled
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
Temperature
Gpu : 73 C
Power Readings
Power Management : Supported
Power Draw : 56.89 W
Power Limit : 235.00 W
Default Power Limit : 235.00 W
Min Power Limit : 150.00 W
Max Power Limit : 235.00 W
Clocks
Graphics : 732 MHz
SM : 732 MHz
Memory : 2600 MHz
Applications Clocks
Graphics : 732 MHz
Memory : 2600 MHz
Max Clocks
Graphics : 784 MHz
SM : 784 MHz
Memory : 2600 MHz
Compute Processes
Process ID : 5860
Name : C:\Program Files\MATLAB\R2012b\bin\win64\MATLA
B.exe
Used GPU Memory : 2229 MB
==============NVSMI LOG==============
Timestamp : Thu Jan 31 08:23:28 2013
Driver Version : 310.90
Attached GPUs : 4
GPU 0000:02:00.0
Product Name : Tesla K20Xm
Display Mode : Disabled
Persistence Mode : N/A
Driver Model
Current : TCC
Pending : TCC
Serial Number : 0324912021549
GPU UUID : GPU-42b69f80-9af6-d385-18fd-f4fc8d55daff
VBIOS Version : 80.10.17.00.02
Inforom Version
Image Version : 2081.0200.01.09
OEM Object : 1.1
ECC Object : 3.0
Power Management Object : N/A
GPU Operation Mode
Current : Compute
Pending : Compute
PCI
Bus : 0x02
Device : 0x00
Domain : 0x0000
Device Id : 0x102110DE
Bus Id : 0000:02:00.0
Sub System Id : 0x097D10DE
GPU Link Info
PCIe Generation
Max : 2
Current : 1
Link Width
Max : 16x
Current : 8x
Fan Speed : N/A
Performance State : P8
Clocks Throttle Reasons
Idle : Not Active
User Defined Clocks : Not Active
SW Power Cap : Active
HW Slowdown : Not Active
Unknown : Not Active
Memory Usage
Total : 5759 MB
Used : 2732 MB
Free : 3027 MB
Compute Mode : Default
Utilization
Gpu : 99 %
Memory : 100 %
Ecc Mode
Current : Enabled
Pending : Disabled
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
Temperature
Gpu : 78 C
Power Readings
Power Management : Supported
Power Draw : 107.21 W
Power Limit : 235.00 W
Default Power Limit : 235.00 W
Min Power Limit : 150.00 W
Max Power Limit : 235.00 W
Clocks
Graphics : 732 MHz
SM : 732 MHz
Memory : 324 MHz
Applications Clocks
Graphics : 732 MHz
Memory : 2600 MHz
Max Clocks
Graphics : 784 MHz
SM : 784 MHz
Memory : 2600 MHz
Compute Processes
Process ID : 5860
Name : C:\Program Files\MATLAB\R2012b\bin\win64\MATLAB.exe
Used GPU Memory : 2715 MB
Any help would be greatly appreciated.