Video perf. is off by 40% PCI-e x8 slot is running @ x4?

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scottfree1_01

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Oct 24, 2012
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Video perf. is off by 40% and apparently this is why?

"PCI-E 2.0 x8 port in Use @ x4 NVIDIA GeForce GTX 760"

Supermicro X8DTH
Dual Xeon X5680 @ 3.33GHz
NVIDIA GeForce GTX 760
DDR3 49144 MBytes


Display adapter 1
Name NVIDIA GeForce GTX 760
Board Manufacturer NVIDIA Corporation
Revision A2
Codename GK104
Technology 28 nm
Memory size 2 GB
Memory type GDDR5
PCI device bus 132 (0x84), device 0 (0x0), function 0 (0x0)
Vendor ID 0x10DE (0x10DE)
Model ID 0x1187 (0x0984)
Performance Level 0
Core clock 823.1 MHz
Memory clock 3004.7 MHz

Win32_VideoController AdapterRAM = 0x80000000 (2147483648)
Win32_VideoController DriverVersion = 21.21.13.7892
Win32_VideoController DriverVersion = 10.0.10586.0
Win32_VideoController DriverDate = 03/16/2017
Win32_VideoController DriverDate = 06/21/2006


DMI BIOS
vendor American Megatrends Inc.
version 2.1b
date 05/04/12
ROM size 4096 KB

DMI System Information
manufacturer Supermicro
product X8DTH-i/6/iF/6F
version 1234567890
serial 1234567890
UUID {49434D53-3858-5555-4944-0025909273C2}
SKU To Be Filled By O.E.M.
family Server

DMI Baseboard
vendor Supermicro
model X8DTH
revision 1234567890
serial 1234567890

DMI System Enclosure
manufacturer Supermicro
chassis type Main Server Chassis
chassis serial 1234567890

DMI Processor
manufacturer Intel
model Intel(R) Xeon(R) CPU X5680 @ 3.33GHz
clock speed 3333.0 MHz
FSB speed 133.0 MHz
multiplier 25.0x

DMI Processor
manufacturer Intel
model Intel(R) Xeon(R) CPU X5680 @ 3.33GHz
clock speed 3333.0 MHz
FSB speed 133.0 MHz
multiplier 25.0x

​
Windows Version Microsoft Windows 10 (10.0) Professional 64-bit (Build 10586)
DirectX Version 12.0​​
 
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nzalog

nzalog

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Yeah that could definitely be a big bottle neck. Have you tried another PCIE slot?
All your slots should be 8X. I wonder if it's doing some weird thing where the lanes are split between the two CPUs....
 
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scottfree1_01

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Oct 24, 2012
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Supermicro only lets you choose 1 slot to use for an external card, emailed support but I usually more help to them than they are 2 me

"Boot Graphics Adapter Priority
This feature allows the user to specify which graphics controller to be used as
the primary boot graphics controller. The options are Onboard VGA, Offboard
VGA, and PCI-E Slot 7."

Here are the bios options, no link speed, the jumpers are the only untried option, guess I need to crack her open ;-(

Active State Power-Management
Select Enabled to use the power management for signal transactions between
the PCI Express L0 and L1 Links. Select Enabled to confi gure PCI-Exp. L0 and
L1 Link power states. The options are Disabled and Enabled.
IOH PCI-E Max Payload Size

Some add-on cards perform faster with the coalesce feature, which limits the
payload size to 128B; while others, with a payload size of 256B which inhibits
the coalesce feature. Please refer to your add-on card user guide for the desired
setting. The options are 256B and 128B.

Bus to PCI-Exp. Slots
Use Jumpers to connect
the System Management Bus to
PCI-Express slots in order to improve
PCI slot performance. These two jumpers
are to be set at the same time. The
default setting is Closed to enable the
connections. See the table on the right
for jumper settings.
 
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scottfree1_01

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"All your slots should be 8X. I wonder if it's doing some weird thing where the lanes are split between the two CPUs...."

Everything's the same video -40% so not architecture..

2cf5t7k.jpg
 
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nzalog

nzalog

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Reseat card?

Latest Drivers?

Any way that you can rule out being a software issue? Use spare drive and install windows and driver to see if it hits 8x?

Update system bios, reset defaults?

Just rule out the easy stuff and isolate the problem.

 
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