Overclocking AMD Phenom II X2 550 BE

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sabby

sabby

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All right, this is a very new 45nm processor from AMD and I am a proud owner of it. :hap2: Let us see how much it can be overclocked.

My mother board is Biostar TA790GX 128M and using its own OC utility ( not from BIOS ) I set the auto option without changing any voltage. It went upto ( 239 X 15.5 ) = 3.7045 GHz and after then rebooted while testing for 240 MHz FSB. Then it was automatically set up to 236 MHz i.e. 3.658 Ghz. :ohyeah: Earlier I tried to enable Advanced Clock Calibration from BIOS and all 3 set ups (Auto, per core and all core ) caused no display. As instructed, I unplugged the CMOS and replaced it. So no success in enabling all the four cores yet. below is a screen shot:

25rlgeg.jpg

But later, I cut down to 225 MHz FSB i.e. 3.49 GHz ( Kolkata is a very hot place these days and I don't have AC ).

So if anybody around here does have this processor then please tell us about your experience about its OC.

And also I need help about that ACC feature. There was another option under it, probably "CIE<disabled>".
 
^ You are using stock or aftermarket cooler.... An aftermarket cooler can help you OC more later.... Also do use AS5 or something similar for good heat transfer...
 
Not much point in running a 10% overclock, really.

Use the BIOS to OC. You should wring out 3.8-4 gigs on some decent cooling and 1.4-1.45 volts on the CPU.

What exactly do you mean by removing the CMOS - did you handle the physical chip, or just the jumper?

ACC is still a 'secret' feature, there is no documentation from AMD on exactly what it does. You have to poke around the settings to see if it works for you. AMD has locked down the BIOS of some boards and manufacturers to prevent ACC from unlocking hidden cores, you will need to find your own way around it for your particular board. Sometimes this involves going back to older BIOS versions or modded BIOS as well. The processor is brand new, so you'll have to wait for somebody to come along and discover it, if you're not equipped to hack it yourself...
 
^^I guess he meant by taking out the battery /:P

Get yourself a good aftermarket cooler before getting your hands dirty ;)
 
@HailStonE

using stock. Will buy an after market cooler in few days when I will get the 4770 and CX400. :)

@cranky,

You are right.. actually I am using the stock ( and did not increase the V core) and don't wanna cause any harm to my new CPU :P Sooner I will buy a cooler and I think I can cross the 4GHz mark.:)

@Dark Star

Right you are,,, I just took out the battery and fit it again :P . That was told somewhere in the manual. Just waiting to sell my old rig n I will get the cooler and may be another 2 GB RAM. Btw, do you think it will boost my performance significantly as I won't play GTA4 ?
 
Okk. Set the Bus speed back to 200MHz and increased the multiplier to 17.5. Also decreased the HT link to 1.2Ghz. Here is a screen shot:

23kdn69.jpg


Well, somebody please confirm the availability of SCCF ( 120 as well as 92mm) and TR Ultima 90 in kolkata. Do you think guys that installing 120mm SCCF will be a problem on my TA790GX 128 MoBo in Zebby Bijli cabinet ??
 
ACC monitors and varies some critical timings in the link between the CPU and the rest of the peripherals. Due to this, it is possible to achieve a higher stable OC. ACC however is only useful for the 65nm phenoms i.e. 9x50, 8x50 and 7x50 series phenoms. The newer 45nm Phenoms have the ACC secret sauce on the CPU die itself. Therefore, even non SB750 boards automatically have ACC enabled on the processor itself. For the new phenoms, the only use of ACC is to unlock the disabled cores.
 
@sumchamp,

hey, its good to see another member to have this procy. :P

btw, you have SCCF and still stuck at 3.76Ghz !!! Go for 4Ghz.

Btw, can you tell me your idle and load temp with and without SCCF ? I am planning to buy one. :)
 
sabby said:
@sumchamp,

hey, its good to see another member to have this procy. :P

btw, you have SCCF and still stuck at 3.76Ghz !!! Go for 4Ghz.

Btw, can you tell me your idle and load temp with and without SCCF ? I am planning to buy one. :)
Click to expand...

I cannot say without SCCF and its a pain to take out and chk with stock heatsink.

My idles are at 27c and i'll definitely go for 4k mark once i'll do all tests for now.
 
It was a piece of cake after madnav's suggestion. U just hav to press either side(from the side where u hav to take out notch).

Pic should make things clear

thebestcpucooler1n.jpg
 
^^Yes I figured it out myself :P Still It is not as easy to install as Ul90 or other HSF that comes with backplate installation ..
 
@sumchamp and Dark Star

well, was the installation problem due to its size and the required space in the case or for the AMD 939/940 pin mobo? FYI, I have Biostar TA790GX 128M and Zebronics cabinet and wish to buy one SCCF 120mm. But I am confused whether I should buy the 92version or 120mm or TR Ultima 90. Reviews show that SCCF 120mm is one of the best in 120mm dept. So will it be the right choice to take SCCF92mm instead of TR Ultima 90 ? or the 120mm SCCF will fit into my board and case ?
 
U should chk whether aftermarket coolers fit in ur cabinet or not(chk for height dimension). Also installing is a pain on AMD systems until u install it pushing its levers.

[mod]Refrain using sms lingo.. Please read forum rules[/mod]
 
sabby said:
@sumchamp and Dark Star

well, was the installation problem due to its size and the required space in the case or for the AMD 939/940 pin mobo? FYI, I have Biostar TA790GX 128M and Zebronics cabinet and wish to buy one SCCF 120mm. But I am confused whether I should buy the 92version or 120mm or TR Ultima 90. Reviews show that SCCF 120mm is one of the best in 120mm dept. So will it be the right choice to take SCCF92mm instead of TR Ultima 90 ? or the 120mm SCCF will fit into my board and case ?
Click to expand...

Space is not an issue .The only reason i can see is AMD bracket and clip design that comes with SCCF..

If you want to get an easy to install and high performing cooler you should rather spend in Thermalright Ultim 90 + Panasonic Paflow | Xigmatek 120mm . It will be around 2400-2600 Rs which is almost same as SCCF current pricing..

Edit : Check this thread Phenom/Phenom II users http://www.techenclave.com/cpu-mobo-corner/amd-phenom-phenom-ii-club-132753.html
 
You don't need a CCF, honestly. The heat load, even overclocked, offered by the 550, is peanuts. I see it not drawing more than 120 watts at 3.8GHz and Prime loaded, so the 160-watt monster coolers will not offer any performance improvement over a good aftermarket cooler.

I'm using a CoolerMaster Gemini IIS, which offers comparable performance to a CCF till a 100 watt dissipation (according to Frostytech it's 3 degrees off at 85 watt loads), the CCF kills it when the heatloads increase. And it cost me <2K, so I'm a happy camper. At 217x17.5 (3.8GHz) it touches 45 degrees on load with a slight overvolt on the core with this cooler, I'm not sure the CCF would be very much better anyway.

I've compared the two coolers extensively on Intel Q6600 and AMD Phenom 9950, and at stock speed the difference is negligible, at overclocked speed the CCF does pull away a bit but not as much as its price would suggest - I never saw more than 3-4 degrees and both coolers easily kept temperatures below dangerous limits. The CCF is also a pain to install on AMD systems, much easier on the Intel, whereas most CM coolers require removal of the motherboard from the case for their brackets (and removal of the stock AMD bracket) but are much easier to get a secure install. With the CCF I'm always worrying about the safety of the stock bracket itself.

Your call, but yeah, get a good cooler.
 
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