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Problem with O.C HD4850

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meodowla   07-13-2009 at 06:11:27 AM

I O.C my HD4850 from 625/993 to 700/1098 with ATi Catalyst Overdrive.. The test result was 'passed'... but when running FarCry2 at 1920x1080 BSOD appears(GPU stops responding)... which other O.C software would be better to attain stable clock..

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ragsters   07-13-2009 at 07:52:33 AM
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I don't think it is the software. What are your temps before it "stops responding"? What cooler do you have on the card?

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rambo117   07-13-2009 at 08:14:52 AM
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ok, to let you on a little fact, the ati overdrive thing that "tests" the GPUs is totally BS
it said i could overclock my 3870s with a core clock of 890mhz and 1375mhz mem clock!!!!
I personally just know what my cards can handle from the pains of crash reports and GPU not responding reports. im sure there are some good softwares out there that let you test out your OCed settings but i dont use any.

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meodowla   07-13-2009 at 02:36:28 PM
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ragsters wrote :

I don't think it is the software. What are your temps before it "stops responding"? What cooler do you have on the card?


My card never/ever goes above 60ºC... Usually it works at 50ºC-54ºC
Its from MSI, looks like this:
http://www.geeks3d.com/public/jegx [...] 01-big.jpg

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meodowla   07-13-2009 at 02:48:39 PM
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rambo117 wrote :

im sure there are some good softwares out there that let you test out your OCed settings but i dont use any.


I tried FarCry2 Benchmark tool, PC MArk Vantage etc... ended up with BSOD(After O.C)..

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meodowla   07-13-2009 at 08:01:15 PM
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3D Mark06 works well. It scored 12720

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daedalus685   07-13-2009 at 08:06:51 PM
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he only sure fire way to make sure it is stable is to play your favourite games.. If it crashes then back off the OC a bit and try again. There is so software that could find every instability, though any benchmark utility will give you some idea of the stability.

------------------------------ CPU: Q9550 at 3.6ghz (FSB 425mhz) | MB: P5E3 Premium | Ram: 4*2Gb Corsair DDR3 @1417mhz | GPU: 2 HD4890 1Gb (925core/1025mem) CF | PSU: OCZ ELiteXtreme 800W | Sound: Creative Titanium Fatal1ty Pro | 2*120gb OCZ Vertex SSD Raid0 and 2 500gb Raid0 HDDS
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orangegator   07-13-2009 at 08:12:08 PM
- 1 +

Use ATITool to scan for stability. From my experience with a Sapphire HD 4850, I got it up to 690/1050 without errors. Going higher, while being stable, would require volt mods.

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meodowla   07-13-2009 at 08:24:44 PM
- 0 +

A tried ATI Tool... the artifact showed Delta Pixels... so it mean, not stable.. cool..

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