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Sapphire 7950 not working with Z77 Extreme4 at GEN 3 Speeds
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  (#1)
carli21
Newbie
 
Videocard: SAPPHIRE Radeon 7950
Processor: Intel Core i5-3570K
Mainboard: ASRock Z77 Extreme4
Memory: CORSAIR Vengeance 16GB
Soundcard:
PSU: Corsair CX600 600W
Default Sapphire 7950 not working with Z77 Extreme4 at GEN 3 Speeds - 12-04-2012, 20:28 | posts: 8 | Location: WA, State

Hello:

I have a Sapphire 7950 paired with an ASRock Z77 Extreme4 (BIOS v2.7) and an i5-3570K. The problem that I have is the following:

The card is only being detected if it’s working at PCIE Gen 2 speeds and it seizes to be detected at Gen 3 speeds.

Here are some details:
- The video card is connected to the PCIE2 port (which is a PCIE 3.0 x 16 slot, all other slots are of lower speed)
- The video card will only be detected if the port is set to GEN1, GEN2 or AUTO in the North Bridge settings in the BIOS
- If the card is set to GEN 3 it stops being detected
- If the card is set to AUTO, when I run GPU-Z it detects it as running only at GEN2 speeds even with the rendering test.
- All the components are new
- All power connectors are connected to the card and I verified that it is seated correctly


So here are my questions…
-What can I do to get the card running at GEN3 speeds?
-What tests can I do to determine which of the components is at fault?
-Should I care about this? I know something is not right but I'm not sure if this is a big deal.


Bellow are the complete system specs:
Intel Core i5-3570K
ASRock Z77 Extreme4
_ BIOS V2.7 (v2.0, 2.2 and 2.5 also tested with same results)
SAPPHIRE 100352-2L Radeon HD 7950 3GB 384-bit GDDR5 PCI Express 3.0 x16
_ GPU BIOS version: 015.023.000.001.000000
_ Driver Ver: Catalyst 12.11 (12.10 also tested, same results)
CORSAIR Vengeance 16GB (2 x 8GB) DDR3 1600
CORSAIR Builder Series CX600 600W ATX12V
Corsair CWCH60 Hydro Series H60 High Performance Liquid CPU Cooler
OCZ Vengeance SSD
LG BD-RE SATA (WH14NS40)
Windows 7 Pro 64-Bit

Other Similar Case:
http://forums.*********.com/asrock/4...al-output.html
   
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  (#2)
BABA-The Hacker
Banned
 
Videocard: PALIT GTX770 OC 2GB
Processor: i7-4790K - Devil's Canyon
Mainboard: ECS-Z87H3-A2XG GANK MACH
Memory: G-Skill 8GB DDR3 1333 MHz
Soundcard: Realtek High Definition
PSU: Corsair Carbide Series™ 4
Default 12-04-2012, 20:37 | posts: 455 | Location: Xylanthia

motherboard...and GPU card firmwares up-to-date?

Yes..MB updated....
   
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Old
  (#3)
BABA-The Hacker
Banned
 
Videocard: PALIT GTX770 OC 2GB
Processor: i7-4790K - Devil's Canyon
Mainboard: ECS-Z87H3-A2XG GANK MACH
Memory: G-Skill 8GB DDR3 1333 MHz
Soundcard: Realtek High Definition
PSU: Corsair Carbide Series™ 4
Default 12-04-2012, 20:49 | posts: 455 | Location: Xylanthia

Quote:
Originally Posted by BABA-The Hacker View Post
motherboard...and GPU card firmwares up-to-date?

Yes..MB updated....
GPU too....

Plz have a quick view: http://forums.guru3d.com/showthread.php?t=365526
   
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  (#4)
carli21
Newbie
 
Videocard: SAPPHIRE Radeon 7950
Processor: Intel Core i5-3570K
Mainboard: ASRock Z77 Extreme4
Memory: CORSAIR Vengeance 16GB
Soundcard:
PSU: Corsair CX600 600W
Default 12-04-2012, 21:20 | posts: 8 | Location: WA, State

Hello, Thanks for the reply.

As far as I know I have the latest GPU firmware. I submitted a ticket to sapphire and I'll know if there is a new one. The website does not mention anything.

I'll try and do some in-game tests to see if I can get the GPU-Z to read x16 speeds but as of now with the rendering tests it's @ 1.1 on idle 2.0 under load.
   
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  (#5)
carli21
Newbie
 
Videocard: SAPPHIRE Radeon 7950
Processor: Intel Core i5-3570K
Mainboard: ASRock Z77 Extreme4
Memory: CORSAIR Vengeance 16GB
Soundcard:
PSU: Corsair CX600 600W
Default 12-05-2012, 01:20 | posts: 8 | Location: WA, State

UPDATE:

I just tested an XFX Radeon R7770 on the same port (and system) as I was testing my Sapphire 7950 and it is working at GEN 3 speeds (PCIE 3x16).

I ran 2 tests:

1. Set the BIOS to GEN3 and the card is detected with no issues
2. Set the BIOS to AUTO and run GPU-Z and it is also detected as PCIE3x16.


I'm currently in talks with Sapphire. Besides the 9750 being broken are there any other issues that I might be missing??
   
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