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| by Michael "SKYMTL" Hoenig | June 2, 2009 | ||
| Overclocking Results Overclocking ResultsWhat do we consider a stable overclock? If the card can pass our test which involves a 20 minute loop of 3DMark06, 30 minutes of playing Far Cry 2 and an additional 30 minute gameplay sequence in Left 4 Dead, it is considered stable. Since overclocking can vary from one card to the next within the same family of cards, you should be aware that these results will not be considered when voicing our final opinions about these four cards. As such, we will show you the final overclocking results but leave our opinions to ourselves and let you guys form your own conclusions. A Note About Voltages Please note that the default core voltages on the cards are as follows: Stock: 1.312V ASUS: 1.312V (Adjustable up to 1.45V) Diamond: 1.312V HIS: 1.312V Sapphire: 1.36V XFX: 1.312V At the time of writing, the voltage used for the overclock on the ASUS TOP Edition was 1.37V through Smartdoctor. We are still experimenting with additional voltages and will update the overclocks in the comment thread in our forums. In addition, the HIS Turbo was excluded from the overclocking section due to the fact we found one that ran the proper clock speeds only two days before this roundup went live. As such, we did not have the time for overclocking stability testing. ASUS HD 4890 TOP Final Overclocks Core: 1026Mhz Memory (DDR): 4560Mhz  Diamond HD 4890 XOC Final Overclocks Core: 968Mhz Memory (DDR): 4644Mhz  Sapphire HD 4890 Atomic Final Overclocks Core: 1035Mhz Memory (DDR): 4420Mhz  XFX HD 4890 Final Overclocks Core: 1004Mhz Memory (DDR): 4784Mhz  | ||
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