Sapphire 7950 OC version crash when OC-ed to 1100+

pizza

member

Activity: 112

Merit: 10

Quote from: YipYip on May 01, 2013, 12:23:00 AM

Quote from: scifimike12 on April 30, 2013, 11:34:01 PM

Quote from: 18RATTT on April 30, 2013, 11:30:32 PM

i understand that, but i thought buying the OC version which is $30 more expensive will give me more OC value. =(
i was hoping maybe i did something wrong in the config file or my gpu-engine and memclock ratio isnt correct or something.

The OC versions guarantee that they'll run at their rated clocks over the reference clock. It doesn't mean overclock better past that.

1100MHz on the core is pretty high and might need a slight bump in voltage.

I have the vortex which is basically the same card but OC and Boost together

I dont go past 1040 core 1098 v 1455 mem and its getting 650 + 24/7 ... i have not bothered to puss it harder as i prefer reliability over in lights max hash rate

What are u mining bitcoin or litecoin?

ewitte

member

Activity: 98

Merit: 10

I just hit 1200 on a 7950 but wasn't going to be there to baby it and make sure it was stable so I dropped to 1150 for the time being.

YipYip

hero member

Activity: 574

Merit: 500

Quote from: scifimike12 on April 30, 2013, 11:34:01 PM

Quote from: 18RATTT on April 30, 2013, 11:30:32 PM

i understand that, but i thought buying the OC version which is $30 more expensive will give me more OC value. =(
i was hoping maybe i did something wrong in the config file or my gpu-engine and memclock ratio isnt correct or something.

The OC versions guarantee that they'll run at their rated clocks over the reference clock. It doesn't mean overclock better past that.

1100MHz on the core is pretty high and might need a slight bump in voltage.

I have the vortex which is basically the same card but OC and Boost together

I dont go past 1040 core 1098 v 1455 mem and its getting 650 + 24/7 ... i have not bothered to puss it harder as i prefer reliability over in lights max hash rate

scifimike12

sr. member

Activity: 303

Merit: 250

Quote from: 18RATTT on April 30, 2013, 11:30:32 PM

i understand that, but i thought buying the OC version which is $30 more expensive will give me more OC value. =(
i was hoping maybe i did something wrong in the config file or my gpu-engine and memclock ratio isnt correct or something.

The OC versions guarantee that they'll run at their rated clocks over the reference clock. It doesn't mean overclock better past that.

1100MHz on the core is pretty high and might need a slight bump in voltage.

18RATTT

sr. member

Activity: 282

Merit: 250

Quote from: crazyates on April 30, 2013, 11:20:11 PM

Not all cards are guaranteed to OC to any given value. Apparently you got one that can't OC quite as far. It happens.

i understand that, but i thought buying the OC version which is $30 more expensive will give me more OC value. =(
i was hoping maybe i did something wrong in the config file or my gpu-engine and memclock ratio isnt correct or something.

crazyates

legendary

Activity: 952

Merit: 1000

Patient: Doctor, it hurts when I do this! *touches elbow*
Doctor: So don't do that!

Not all cards are guaranteed to OC to any given value. Apparently you got one that can't OC quite as far. It happens.

notaek

legendary

Activity: 1268

Merit: 1009

Every card overclocks differently; some better than others. In this case, one of your cards overclocks better than the other one. There is no way around this.

18RATTT

sr. member

Activity: 282

Merit: 250

Hi guys, recently i bought two different Sapphire HD 7950:
1. SKU# 11196-02-40G (this is the Sapphire HD 7950 OC version) <-- ~$30 more expensive
2. SKU# 11196-19-41G (this is the Sapphire HD 7950 with Boost)

However, when i tried to OCed the #1 to --gpu-engine 1100+ it will crash the cgminer.
here are the config that im running:

Code:

cd C:\Users\User\Desktop\cgminer-2.11.4-windows
color 06
cgminer.exe -o stratum.btcguild.com:3333 -u USER -p PASS -I 9 --auto-gpu --gpu-engine 1000 --gpu-memclock 300 --gpu-fan 85

Arent #1 is suppose to be OC-ed better than #2 ?? but right now its underperform my #2, which runs --gpu-engine 1100-1200 and get 630Mh/s

Any help will be much appreciated. thanks.

Topic: Sapphire 7950 OC version crash when OC-ed to 1100+ (Read 2391 times)