Posts by BarrowHill

1) Message boards : Number crunching : GPU Requirements [OLD] (Message 37797) Posted 27 Mar 2010 by BarrowHill Post: Yes Madhalo, you are quite right. Reducing GDDR frequencies in many tapes of graphic cards significantly reduces power draw and temperature. This is most usable for VGA wich has GDDR5. For example my VGA is Sapphire HD4730 512Mb 625MHz/3600MHz. Power consumption of my "stupid" VGA is more than 75W in idle!!! In idle state radiator is so hot that I can't touch it! Using ATI Try Tools v1.6.9.1451 I can easily change both GPU and DDR frequencies. This is the measurements of power usage of my PC (without monitor) in idle state/in boinc with active MilkyWay tasks/time to take for 1 task to complete: 1. 625MHz/3600MHz - 266W/340W/6m30s Default clocks 2. 625MHz/4000MHz - 275W/352W/6m35s 3. 625MHz/2000MHz - 232W/308W/6m15s 4. 625MHz/1200MHz - 220W/289W/6m01s So we can see that reducing GDDR5 frequencies is important)) I can say the one thing. Sapphire and maybe even ATI are stupid brands! Because the power consumption in idle state vor my VGA is very big!! I can't find bios which can fix this problem. Because power consumption more than 50-70W in idle for non top VGA is a problem!
2) Message boards : Number crunching : GPU Requirements [OLD] (Message 37681) Posted 23 Mar 2010 by BarrowHill Post: ATI HD Radeon 4730 also supports double precision. This is my card and it is 100% works.