Tuesday, January 26th 2010
Athlon II X2 255 Reaches 4.80 GHz
Renowned overclocker Chew* set a speed record for AMD's new value dual-core processor, the Athlon II X2 255. Based on the Regor core, the X2 255 is a monolithic dual-core chip, with just two physical cores on die, and additional L2 cache, with no L3 cache. This cuts the TDP of the chip to 65W. On the bench built by Chew*, the X2 255 reached 4800.1 MHz, with a BClk of 320.01 MHz, multiplied by 15.0. The chip's natural multiplier value is 15.5x, its stock speed is 3.10 GHz. A VCore of 1.696 Volts was set.
The processor was cooled using a Mach 1 phase cooler. The bench consisted of an Athlon II X2 255, Gigabyte GA-MA785GPMT-UD2H motherboard - another mainstream component which proved its mettle, OCZ DDR3 1600 MHz Black Edition certified memory, PC Power & Cooling 1200W PSU, and ATI Radeon HD 4890 graphics. The CPU-Z validation for this feat can be found here. In the same occasion, Chew* could overclock the chip to 4050 MHz using a reference AMD CPU cooler (which comes bundled with higher-end AMD chips). More pictures at the source.
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The processor was cooled using a Mach 1 phase cooler. The bench consisted of an Athlon II X2 255, Gigabyte GA-MA785GPMT-UD2H motherboard - another mainstream component which proved its mettle, OCZ DDR3 1600 MHz Black Edition certified memory, PC Power & Cooling 1200W PSU, and ATI Radeon HD 4890 graphics. The CPU-Z validation for this feat can be found here. In the same occasion, Chew* could overclock the chip to 4050 MHz using a reference AMD CPU cooler (which comes bundled with higher-end AMD chips). More pictures at the source.
24 Comments on Athlon II X2 255 Reaches 4.80 GHz
no doubt he's held back on this review
@Btarunr: It was a 1200w power supply, not 750. :toast:
It's wasn't necessary but those PSU's live on that particular bench station, other 2 stations were tied up with "other" things :)
Cpuz is rejecting everything right now thats AMD, even at stock, no clue.
My 240 hits a FSB wall at 260
Then again I've never gone above 1.48v with the crummy stock cooler that comes with it
Wow I'm surprised it didn't pop at 1.696v
One must ask though, was a 1200W PSU really necessary?
Also the default multiplier of that CPU is 15.5x (15.5 * 200 = 3100), not 15... if Chew* had left it at 15.5 he would have ended up just shy of 5GHz. :)
Totally kills the mood when that happens... :roll:
Excellent overclock, but it needs LN2!
I just picked up a 250 the other day that I could squeeze 4 GHz out of on the stock heatsink that it came with--yes, the wimpy little one. Makes me wonder what a better board would do with it. I'm using a Gigabyte MA78LM-S2H haha.
Your wish is my command.
What happened to the Gigabyte board?
6GHZ is awesome.:rockout:
BTW how much CPU NB VID did you apply?