Title: Problem with two r9 280x toxic - first card is slower Post by: papaya on January 29, 2014, 03:41:10 PM Hi everybody,
I have a strange problem with those cards. The card with a monitor has a ~100kH/s lower speed than the other card: See: http://up-pic.de/images/img134/1583r9280x.png I don't know what I have changed... (BIOS, VBIOS, Windows, etc...) But at the first time i tried out these cards, both runs at ~760kH/s I've reset the MB Bios, Card Bios and set up a new windows. But it's still the same. Maybe you have an idea what's wrong here... My HW: - MSI 7816-001R Z87-G43 Intel Z87 Mainboard Sockel LGA 1150 (4x DDR3, Intel HD Graphics, 2x PCI-e, 6x SATA, ATX) - Kingston KHX1600C9D3B1/4G RAM 4GB (1600 MHz, CL9) DDR3-RAM - 2x Sapphire R9 280X 3GB Toxic (PCI-e, 3GB GDDR5, HDMI, DVI, 1 GPU) - Intel BX80646G3220 Pentium G3220 (3GHz, LGA 1150, 3MB Cache, 54 Watt) SW: - Windows 7 Pro SP1 (with all updates) - Catalyst 13.251-131206a-166389C-ATI - TightVNC Server - CGMiner 3.7.2 My Config: (cgminer.conf) Code: { (run.bat) Code: set GPU_MAX_ALLOC_PERCENT=100 Best regards Title: Re: Problem with two r9 280x toxic - first card is slower Post by: nytrolic on January 29, 2014, 03:58:24 PM Wrong sub forum, maybe try posting here: https://bitcointalk.org/index.php?board=160.0
Title: Re: Problem with two r9 280x toxic - first card is slower Post by: elchorizo on January 29, 2014, 04:01:12 PM Set your resolution on the display to as low as possible and see if your hash rate increases. I use these at the top of my shell script that I start cgminer with:
Code: export DISPLAY=:0 For you, the xrandr might make a difference. Title: Re: Problem with two r9 280x toxic - first card is slower Post by: papaya on January 29, 2014, 04:10:18 PM Set your resolution on the display to as low as possible and see if your hash rate increases. I use these at the top of my shell script that I start cgminer with: Code: export DISPLAY=:0 For you, the xrandr might make a difference. ehm. my operating system is windows, not linux. but changing the resolution doesn't help. Title: Re: Problem with two r9 280x toxic - first card is slower Post by: elchorizo on January 29, 2014, 04:14:12 PM Set your resolution on the display to as low as possible and see if your hash rate increases. I use these at the top of my shell script that I start cgminer with: Code: export DISPLAY=:0 For you, the xrandr might make a difference. ehm. my operating system is windows, not linux. but changing the resolution doesn't help. I don't mine on Windows but I have seen a couple tidbits that might help... ULPS on Windows could be causing it: https://litecointalk.org/index.php?topic=9441.0 http://www.overclock.net/t/667144/crossfire-disabling-ulps http://www.sevenforums.com/tutorials/316913-ulps-ultra-low-power-state-disable-amd-crossfirex.html |