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.


Source: TechReaction.net Forums
Add your own comment

24 Comments on Athlon II X2 255 Reaches 4.80 GHz

#1
TheGoat Eater
um ... yeah - may want to correct the "cascade" part - was a mach1 - lower powered SS phase (single stage)... LOL I'll have to ask why he held back on the ln2 :p

no doubt he's held back on this review
Posted on Reply
#2
skylamer
Awesome with air........ :D)
Posted on Reply
#3
heky
Also correct the used PSU part, the picture shows 2 1200W units. One Antec Truepower Quattro 1200W and one PC Power & Cooling 1200W. Thats a lot more than one PC Power & Cooling 750W unit.
Posted on Reply
#4
newtekie1
Semi-Retired Folder
4GHz on air great!

@Btarunr: It was a 1200w power supply, not 750. :toast:
Posted on Reply
#5
sapetto
Not validated by CPUz :confused: whats that
Posted on Reply
#7
chew*
by: heky
Also correct the used PSU part, the picture shows 2 1200W units. One Antec Truepower Quattro 1200W and one PC Power & Cooling 1200W. Thats a lot more than one PC Power & Cooling 750W unit.
Hmmm , you can clearly see that the 1200 antec OC is not hooked up to anything ;)

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.
Posted on Reply
#8
Sasqui
In a word, Wow! In a few more words, too bad no benchmarks!
Posted on Reply
#9
jmcslob
Nice Job chew*

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
Posted on Reply
#12
WhiteLotus
by: [H]@RD5TUFF
Meh.
It's an impressive feet with just mainstream hardware.

One must ask though, was a 1200W PSU really necessary?
Posted on Reply
#13
EnJoY
by: Sasqui
In a word, Wow! In a few more words, too bad no benchmarks!
You must not have clicked the link. There are benches in the thread @ TR.

by: [H]@RD5TUFF
Meh.
You don't think 4.8GHz is impressive on a budget chip with an old, under-powered phase change unit designed to run on Pentium 4 Northwood's? Ok. :rolleyes:

by: WhiteLotus
It's an impressive feet with just mainstream hardware.

One must ask though, was a 1200W PSU really necessary?
No, definitely not, but why not?
Posted on Reply
#14
DrunkenMafia
Shit he used the same MB as I have, I cant get my fsb up to 300 though. :)
Posted on Reply
#15
Assimilator
bta, maybe edit your original post to add the info that the stock speed of the 255 chip is 3.1GHz?

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. :)
Posted on Reply
#16
HammerON
The Watchful Moderator
by: chew*
Hmmm , you can clearly see that the 1200 antec OC is not hooked up to anything ;)

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.
Crazy OC and welcome to TPU:toast:
Posted on Reply
#17
Dippyskoodlez
by: WhiteLotus
It's an impressive feet with just mainstream hardware.

One must ask though, was a 1200W PSU really necessary?
750w could probably power the CPU, but why not just overcompensate if it's available? Doesn't make sense to waste time possibly having to troubleshoot a bunk PSU, if you hit a frequency barrier.

Totally kills the mood when that happens... :roll:

Excellent overclock, but it needs LN2!
Posted on Reply
#18
johnnyfiive
Who cares what PSU was used? That is an impressive overclock. Congrats Chew*!
Posted on Reply
#19
breakfromyou
Congrats Chew*

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.
Posted on Reply
#21
Hayder_Master
great work "Chew*" , keep on moving , welcome to TPU
Posted on Reply
#22
exodusprime1337
hahha, i got to see some of chew*'s work firsthand, he lives not 10 minutes from me lol
Posted on Reply
#23
chew*
by: Dippyskoodlez
750w could probably power the CPU, but why not just overcompensate if it's available? Doesn't make sense to waste time possibly having to troubleshoot a bunk PSU, if you hit a frequency barrier.

Totally kills the mood when that happens... :roll:

Excellent overclock, but it needs LN2!
Budget system benching is fun :cool:

Your wish is my command.



Posted on Reply
Add your own comment