The AMD Phenom II OC'ers Club

[Wartz]

It is crazy! I rebooted and now it doesn't show the extra core. CPU-z is now correctly identifying in the specification string "X3 720" when it was saying "X4 20". If this is a BIOS error does that mean that AMD doesn't use a laser to sever the connection to one of the cores but instead instructs the BIOS to ignore it? Does that mean there might be a way for some BIOS editor to re-enable it?

Ive seen another thread where someone had 4 cores showing up on a kuma 7750, I didn't follow up on the thread though so I don't know what happened.

 

[Flyordie]

http://valid.canardpc.com/show_oc.php?id=512050
I am preppin to run it higher but the highest stable I got was 3.6Ghz @ 1.4V one of my DDR2 sticks is holding me back @ DDR2-1010.

AMD doesn't laser cut them anymore... its a DMI update now. Disables them via the EEPROM on the chip itself. Sometimes it will be mis-read and may re-enable the core for that boot... which may explain why some X3/X2 owners get a failed boot every now and then while OCd.

 

[Super XP]

Forget about the RAM speed so long as you got a stable CPU OC. Once you have a stable CPU OC, start playing around with the RAM. If your RAM is holding your CPU back then underclock the RAM to take it out of the equation.

AMD is sort of smart, nothing wrong with making a failed Quad-Core into a Tri or Dual Core. Intel ran into many failed Core i7 Quad-Core's and they threw them away.

 

[Flyordie]

Please note this is on the stock cooler.
CPU voltage will never pass 1.4V. So I figure I would just push it that high and see what I get. but 3.5 seems good. @ 1.4V

 

[Chicken Patty]

Forget about the RAM speed so long as you got a stable CPU OC. Once you have a stable CPU OC, start playing around with the RAM. If your RAM is holding your CPU back then underclock the RAM to take it out of the equation.

thats what I tell everybody. Also keeping your HT a bit below default helps keep the CPU stable as well. Once you reach your goal for the CPU you can raise everything else. You wanna try to take as many things out of the equation as possible.

 

[trt740]

LOL. It sounds like Wile and I are the "prophets of doom". I just don't want to see people kill their chips. I'll be curious to see degradation report, even though I've sold my AMD rig.

1.5v is even listed on the AMD specs on these chips and I have never seen that before.

 

[cdawall]

1.5v is even listed on the AMD specs on these chips and I have never seen that before.

mine ran 1.65v no issues for 24/7 but that was only a couple of weeks and it got put on DICE/LN2 for some 5.5ghz runs on XS when i sold it

 

[trt740]

mine ran 1.65v no issues for 24/7 but that was only a couple of weeks and it got put on DICE/LN2 for some 5.5ghz runs on XS when i sold it

I saw that.

 

[trt740]

mine ran 1.65v no issues for 24/7 but that was only a couple of weeks and it got put on DICE/LN2 for some 5.5ghz runs on XS when i sold it

I keep seeing 4.0ghz on these 940s with certain stepping and using very low voltage . That tells me AMD is holding back a bit binning wise. These chips are gonna improve a bunch I have a feeling.

 

[cdawall]

I keep seeing 4.0ghz on these 940s with certain stepping and using very low voltage . That tells me AMD is holding back a bit binning wise. These chips are gonna improve bunch I have a feeling.

i have seen 4ghz on stock vcore using 0852 chips not stable

 

[exodusprime1337]

i can hit 4.2 on mine but it needs 1.6v and it's very hot. like 48 idle 60 or so load, too much heat and i can't afford to go cooking a chip. i need water.. anybody wanna piece together a decent kit for less then 200 bucks that will get me started?

 

[Flyordie]

Is 3.6Ghz on 1.40V good?
12hrs P95 stable.

 

[trt740]

Is 3.6Ghz on 1.40V good?
12hrs P95 stable.

very good most need 1.45v for that. If you want the best overclocking stability test for a cpu use this tool, even prime doesn't stress a cpu like this. http://www.majorgeeks.com/OCCT_d5612.html or here http://www.ocbase.com/perestroika_en/index.php?Download

 

[Super XP]

thats what I tell everybody. Also keeping your HT a bit below default helps keep the CPU stable as well. Once you reach your goal for the CPU you can raise everything else. You wanna try to take as many things out of the equation as possible.

Just my point, and I agree 100%.

1.5v is even listed on the AMD specs on these chips and I have never seen that before.

Ya, you can even cook burgers on them
I am very surprized about the volts though. Maybe AMD knows something we don't.

 

[Super XP]

Is 3.6Ghz on 1.40V good?
12hrs P95 stable.

Yes, I used to have it at 3.60 GHz with 1.375v and it wasn't enough. So I think 1.4v is a safe bet.

 

[trt740]

Is 3.6Ghz on 1.40V good?
12hrs P95 stable.

Yes, I used to have it at 3.60 GHz with 1.375v and it wasn't enough. So I think 1.4v is a safe bet.

try it with the tool I listed, it will tell you if you are truely stable. http://www.ocbase.com/perestroika_en/index.php?Download

and here are the Phenom II stats voltages included



Model
Brand AMD
Series Phenom II X4
Model HDZ940XCGIBOX
CPU Socket Type
CPU Socket Type Socket AM2+
Tech Spec
Core Deneb
Multi-Core Quad-Core
Name Phenom II X4 940
Operating Frequency 3.0GHz
Hyper Transports 3600MHz
L1 Cache 4 x 128KB
L2 Cache 4 x 512KB
L3 Cache 6MB
Manufacturing Tech 45 nm
Voltage 0.875-1.5V
Thermal Power 125W
Manufacturer Warranty
Parts 3 years limited
Labor 3 years limited

 

[Super XP]

Cool, I just finished downloading it. It's nice too see we can take the vCore upto 1.5v

 

[trt740]

Cool, I just finished downloading it. It's nice too see we can take the vCore upto 1.5v

I'm betting your voltage is too low, but maybe not Occt is a stressing mother, alot more stress full than prime95, try to use your computer when it's under load and you will see.

 

[Super XP]

Sounds great, I will try it and let you know how it went. I did for now drop the volts to 1.35v and up'ed the CPU speed to 3.40GHz in stead of the 3.60GHz due to some gaming issue. I did this to see if its the game or the CPU giving me problems.

I later on found out its my 8GB of ran running at DDR2-1066 so I had to drop it down to DDR2-800 but with 4-4-4 timings which gives me equal performance anyway.

 

[Chicken Patty]

i can hit 4.2 on mine but it needs 1.6v and it's very hot. like 48 idle 60 or so load, too much heat and i can't afford to go cooking a chip. i need water.. anybody wanna piece together a decent kit for less then 200 bucks that will get me started?

dude this is great to start off, great kit and should keep your Phenom happy.

http://www.sidewindercomputers.com/swh2colicoki.html

 

[Super XP]

That's what I was looking at the other day. This store is awesome.

 

[Chicken Patty]

That's what I was looking at the other day. This store is awesome.

i've only bought from there once and the the owner Gary is an awesome guy. He had me updated everyday via email about the order. When it shipped etc. Great customer service. I just haven't had to order anything else since, but I will def. order from them.

 

[Super XP]

I purchased most of my water cooling and PC modding parts back in 2004 from his store. They are overall one of the best online stores I've ever dealt with. After doing an online custom water cooling review I feature them “sidewindercomputers.com” in my last page of the review as they were my main store for parts source with exceptional customer service and quality of products.

 

[Chicken Patty]

I purchased most of my water cooling and PC modding parts back in 2004 from his store. They are overall one of the best online stores I've ever dealt with. After doing an online custom water cooling review I feature them “sidewindercomputers.com” in my last page of the review as they were my main store for parts source with exceptional customer service and quality of products.

thats pretty cool, I didnt now you had done a little review. got a link?

 

[trt740]

i've only bought from there once and the the owner Gary is an awesome guy. He had me updated everyday via email about the order. When it shipped etc. Great customer service. I just haven't had to order anything else since, but I will def. order from them.

I second that Gary is great. Hey guys the key to keeping your cpu voltage low is cranking the north bridge. I have been testing it with my last few chips and it works with them all. You need 1.45v to 1.5v, try it it works.