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Anyone has overclocking expiriences with Opteron 170/175?

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November 8, 2006 12:04:36 PM

Hi,

I want to upgrade my desktop system and I want to know how far I can expect to OC an Opteron 170/175 CPU on my mainboard. My stable OC-ed desktop system is this:

ASUS A8N5X(with A8N-E BIOS v.1003) NF4 A3 Rev2 s939 PCIe HTT 1040MHz (4x270MHz)
Athlon64 s939 Venice Rev E6 @2.7GHz (10x270MHz) @1.5v
2x512MB A-DATA Vitesta DDR-500 @450MHz CL2 3-3-6 CR1 3.0v
Creative Labs Audigy 2 6.1
Inno3D GeForce 6600 256MB DDR2 PCIe 350/700 @545MHz/830MHz
2x160GB Maxtor SATA 7200RPM 8MB Cache
LG DVD-ROM 16x
Sony CD-RW 40x
PSU Deluxe 420W continous ATX 120mm low noise
Cooler Master Vortex all cooper 90mm low noise

So what do you think? What stable OC I can expect with those CPUs?
November 9, 2006 1:16:31 PM

I've had my opteron 170 at 2.6GHz for about a year (260 x 10) at just under 1.4 volts. I don't bother going any higher because my mobo doesn't allow over volting unless I hard mod the regulation, though I have had it at 2.8 GHz. Zalman 9500 (I think - it's been awhile), runs cool, and reliably. Cheap Asrock 939 dual sata motherboard. Great processor - would be fun to try it on a real OC motherboard, but I like the fact that this board does both AGP and PCI-e simultaneously. It's a 30% OC without adding voltage.
November 9, 2006 2:01:46 PM

Do you think if someone had A DFI LP SLI-Dr Expert mobo, they can increase the voltage hence giving a more OC head?
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November 9, 2006 4:31:39 PM

Quote:
Do you think if someone had A DFI LP SLI-Dr Expert mobo, they can increase the voltage hence giving a more OC head?

Yes, but decend RAM and power supply are required also. On my mainboard I can push the CPU votlage to 1.55v. My CPU boots Windows and works at 2.8GHz at 1.55v, but it is not stable. At 2.7GHz at 1.5v I am running it for a half year without problems. I hope I'll be able to achieve 2.6-2.7GHz with either Opteron 170 or 175.
a b à CPUs
a b K Overclocking
November 15, 2006 3:32:12 AM

Yes, my fromer rig was an Opty 170, and it was an excellent CPU. I couldn't have been more pleased with the 170, and it's overclockability. It was stable but very close to it's limit @ 3.0Ghz (1.500 vCore / 54c load), but I typically ran it as an FX-62 equivalent at 2.8Ghz (1.325 vCore / 47c load).

Build:

Opteron 170
Zalman 9500
MSI K8N Neo 4 Platinum
2Gb Corsair TwinX2048-3500LL (Low Latency) 1T
2 Raptor 150's RAID0
Saphire X1900 XT
Enermax 485W

I became rather attached to it, as it was one of the best rigs I've ever had, and felt somewhat conflicted to disassemble the parts for eBay. It was such a tuned up rig, I would have much prefered it to be sold as a unit, but unfortunately for someone, it didn't work out that way.

The MSI board was a great overclocking platform, but it had a rather common negative characteristic, in that vCore fluctuation could exceed 80 millivolts. When you're trying to run a CPU on less voltage than a flashlight battery, that's just too sloppy. Fortunately, the voltage regulation issue continues to improve, as my new Asus board features eight phase regulation, and typically fluctuates a tolerable 24 millivolts.

The Opteron 170 is one of the finest CPU's AMD has ever produced, and when overclocked, it's a tough act to follow, and for the money, you can't go wrong with it.
November 15, 2006 2:09:09 PM

If you can't get to 3ghz on 1.55 vcore then its not the voltage to the CPU thats holding you back. Both my 148 and 170 did 3ghz (148 actually making 3.2) the 170 did it @ 1.45v the opty I raised to 1.5v just to give it the extra juice.

You might need to set a divider, raise your chipest voltage, mess with your alpha timings, relax your ram a bit etc etc.
November 15, 2006 2:38:35 PM

What sort of cooling are you guys using on your Opty 170's to get beyond 2.5GHz?

I'm using a Zalman 9500 on a ASUS A8N32-SLI Deluxe and I've had a hard time getting it stable beyond 2.5GHz. At 2.5GHz, it runs very well but both the motherboard and CPU seems to run very hot. I actually had to REDUCE to the voltage from the stock "auto" settings on the ASUS MB to get it to run at the non-overclocked 2.0GHz.

My temps via Speedfan are: ~45 deg C for the CPU and high 30's to low 40's for the MB. Is this normal? If not, what am I doing wrong?

Also, one more thing I noticed, CPUz consistantly reports a higher core voltage than the ASUS bios setting.

I've also mouted fans just about everywhere on my case included one 100ish mm one in the floppy bay with all the spacers removed blowing straight back across the CPU. A factor may be that in the summer here in the desert, my computer room is in the low to mid 80's deg F....)-;
November 15, 2006 2:57:29 PM

TT typhoon on the Opteron for 3ghz. 170 was on water. 3.2 for the 148 was watter as well.
a b à CPUs
a b K Overclocking
November 15, 2006 3:22:57 PM

The Zalman 9500 is one of the best air coolers you can own. It sounds like you probably haven't missed any details, but remember that all CPU's, as well as all Opty 170's are electronically unique. We can project what we may expect form an overlocked 170 based upon stepping and what constitutes historically typical performance data, but that doesn't mean that you may be able to improve upon what you've been able to achieve with your particular and unique Opty 170.

Overclocking is always a roll of the dice. CPU's fabricated from one area of the chip wafer may be less flawed than from an adjacent area, and and therefore respond better when overclocked by requiring less voltage to reach the highest overclock before hitting their own unique wall. Aside from marketing requirements, CPU's are generally binned according to rigorous testing, so a typical Opty 170 will overclock higher than a typical Opty 165. Some enthusiasts are tenacious enough to purchase CPU's based upon locating availability on those with the most favored stepping codes known to typically produce the highest overclocks.

Hope this helps, and enjoy!
November 15, 2006 3:26:43 PM

imo the 9500 isnt that great. which is exactly why the 9700 was developed with the same compatibilities.
a b à CPUs
a b K Overclocking
November 15, 2006 3:51:05 PM

I agree that there are better air coolers than the Zalman 9500 or 9700, striclty speaking within the context of coolong the CPU, however, the radial design also provides airflow over the Northbridge as well as the voltage regulators, and any other components near the CPU socket. The Zalman solution takes into consideration design features which benefit the entire system cooling scheme, which for me as well as many others, makes it a logical choice.
November 15, 2006 3:52:37 PM

I've had good results with my opty 165 i got it up to 2.9 ghz on air cooling around 53-54 on load but i think either a voltage was to low or something wasn't liking the speed as it didn't like that speed so now it's back to 2.4.
November 15, 2006 3:56:13 PM

Very true....Zalman designs seems to pass air over RAM sticks mosfets etc.... this first became prevelent in the 7700's design.

touche' I'm still sticking with either my scythe or Typhoon though :lol: 
November 15, 2006 4:41:19 PM

A good friend of my has the DFI expert and a 175 with a Thermal Right Xp-120. It's in a air-conditioned room that stays around 65 degrees F. At 3.0ghz under 100% load, it hits 42 degrees. He has to bump the voltage up to get to 3.2, and for most things the difference isn't worth the extra 15 degrees it causes.
November 15, 2006 5:05:30 PM

I just got an Opteron 170 for my A8N-E. I previously had a 3200 Venice that would only do 2.5Ghz stable. Next, I had a 4400 X2 that could do 2.6 with 1.55 volts. Currently I have the Opteron running stable at 2.5 Ghz with 1.25 volts. I got lucky with the stepping lotery, my stepping was reported to be the most consistant to do 3.0Ghz on air.

:idea:
Regarding the upgrade, if you are at 2.7Ghz, you won't notice a big difference on games. Dual core is really nice for multi-tasking though. Depends on what you are using it for.
November 15, 2006 5:08:28 PM

sorry, 1.25v? am I reading that correctly?
November 15, 2006 5:14:11 PM

For me, it seems the Zalman 9500 (or 9700) design makes sense because my mother board is a fanless heat pipe design. This HSF at least pulls air across the memory, through the heat sink, and then finally past the ASUS heat pipe heat sink before being exhausted out the back of the case.

As I said before I supplimented this by duct taping an addition fan in line with the Zalman inside the harddrive bay. What I didn't mention is that I have two 80mm fans behind the Zalman on the back of case blowing air out the back plus an additional 80mm "input fan" on the bottom front of the case. I swear the thing is a wind tunnel, but I'm still getting 45C with my Opty 170. I also routed all the cables so that my "upper air path" is essentially a straight shot from the front of the case, through the Zalman, then out the back with no interference. (I'll have to post photos some day...).

Granted it overclocks very stable (test with Prime 95 on both cores for many days) at 2.5GHz when the ambient or room temperature is in the low 80 deg F, so I guess I shouldn't complain since this is a 25% overclock. I just had higher expectations for lower temps and at least 2.7GHz on air.

What are you guys using for core voltage, what temps are you getting, and finally, is this with air or liquid cooling.
a b à CPUs
a b K Overclocking
November 15, 2006 5:26:53 PM

45c at load is excellent, so no worries until you pass 50c. Most overclockers agree that 50c is a good reference point for heat / stability threshold, so you still have some headroom to add a little more vCore and clocks. I'd say give it a try.
November 15, 2006 5:34:34 PM

Thanks. That sorta tracks what I've been seeing too. My rig is either 45C and stable or >=50C and unstable (I can't seems to get it in between...(-; ).

What happens is my MB temp also seems to be a factor as it will start pushing 42C when the room temp is high and the system starts to behave poorly there as well.

To answer the original posters question. Yeah the Opty are good overclockers. I run my 170 at 2.5MHz on air and you can read my other posts for my rig description. I just wish I could make it run faster....(-;

Oh yeah, and I'm using OCZ Platinum 500 memory (I thinks that's 500MHz or DDR500 or some such).
November 15, 2006 6:00:21 PM

Quote:
sorry, 1.25v? am I reading that correctly?
That must be a typo as 1.25 would be lower than the X2 4400+'s stock voltage.
a b à CPUs
a b K Overclocking
November 15, 2006 6:22:14 PM

He must've meant 1.35.
November 15, 2006 8:32:52 PM

Please explain to me how the Zalman 9700 and the 9500 cool the northbridge. The 7000 series I can see, but the 9000 series I cannot.
a b à CPUs
a b K Overclocking
November 15, 2006 9:16:56 PM

The radial design of the Zalman 9xxx first pulls air accross the memory modules into the fan blades. Considerable airflow from the fan diverges in a radial pattern, is channeled through the fins, and flows over the surrounding components. The remainder of the fanflow is then pulled accross the voltage regulators and into the case exaust fans. Since many Northbridge heatsinks are in close proximity adjacent to the CPU socket, the Zalman also serves to cool the chipset.
November 15, 2006 9:50:48 PM

I can run with that, but I would see it benefiting the VRMs more than anything else.
a b à CPUs
a b K Overclocking
November 15, 2006 9:53:26 PM

True. It does. Good observation.
November 15, 2006 10:25:37 PM

To pile on:

On the ASUS A8N32-SLI Deluxe motherboard, in particluar, the south and north bridge are connected via a heat pipe that extends to a heat sink that is located right behind the CPU. The Zalman 9500/9700 blows right across this heat sink before the air gets exhaust out the back of the case.

Unfortunately, for me, I noticed no motherboard temperature difference when I added this HSF to my rig. Though, I'm to understand the sensor for "MB Temp" is located on the other end of the ASUS motherboard, near the PCI slot, so that may be expected.
November 16, 2006 11:56:07 AM

Quote:
I just got an Opteron 170 for my A8N-E. I previously had a 3200 Venice that would only do 2.5Ghz stable. Next, I had a 4400 X2 that could do 2.6 with 1.55 volts. Currently I have the Opteron running stable at 2.5 Ghz with 1.25 volts. I got lucky with the stepping lotery, my stepping was reported to be the most consistant to do 3.0Ghz on air.

:idea:
Regarding the upgrade, if you are at 2.7Ghz, you won't notice a big difference on games. Dual core is really nice for multi-tasking though. Depends on what you are using it for.

What steppings has your Opteron 170?
Also, if anyone else knows, what Opteron 170/175 steppings are the best for overclocking?
November 16, 2006 12:13:38 PM

Quote:
I just got an Opteron 170 for my A8N-E. I previously had a 3200 Venice that would only do 2.5Ghz stable. Next, I had a 4400 X2 that could do 2.6 with 1.55 volts. Currently I have the Opteron running stable at 2.5 Ghz with 1.25 volts. I got lucky with the stepping lotery, my stepping was reported to be the most consistant to do 3.0Ghz on air.

:idea:
Regarding the upgrade, if you are at 2.7Ghz, you won't notice a big difference on games. Dual core is really nice for multi-tasking though. Depends on what you are using it for.

What steppings has your Opteron 170?
Also, if anyone else knows, what Opteron 170/175 steppings are the best for overclocking?
a b à CPUs
a b K Overclocking
November 16, 2006 12:18:23 PM

This is the Opty 170 I had which ran stable @ 3.0Ghz / 1.5 vCore.

Model: OSA170DAA6CD
Stepping: CCBBE 0610DPMW
Serial: 1430261C60932
Core: Toledo

I was fortunate to receive a CCBBE and as I researched Opterons, I found that this stepping was apparently one of the most overclockable cores.
November 16, 2006 1:16:11 PM

i have an opty 170 / DFI nf4 ultra rig.

it will run @ 2.5 GHz @ 1.25V (yes: 0.1V undervolt with c&q enabled), 2.65 GHz @ 1.35V, 2.8@2.5, 3.0 @ 2.65. my stepping isnt too great, but with a ghetto modded tt big tyhoon it keeps relatively cool (46°C load @ 3.0 GHz). i am however reluctant to push it beyond that, as i dont feel like frying it.
November 16, 2006 2:36:27 PM

Quote:


it will run @ 2.5 GHz @ 1.25V (yes: 0.1V undervolt with c&q enabled), 2.65 GHz @ 1.35V, 2.8@2.5, 3.0 @ 2.65.


Am I reading that right? your clock speed on the left and voltage on the right?? If that is what you mean its bullshit; anything over 1.7vcore on those chips get's truely dangerous. Now next I bet your gonna say you have Ln2, gallium or nitrogen.
November 16, 2006 3:05:33 PM

Give him a break. I bet he really meant 1.5V and 1.65V vice 2.5 and 2.65V

I ended up undervolting mine too to get it to run stable at 2.5GHz.
November 16, 2006 5:38:18 PM

Quote:
Give him a break. I bet he really meant 1.5V and 1.65V vice 2.5 and 2.65V


1.65v on air is a bit much still.
November 16, 2006 5:45:05 PM

I have an Opteron 175 currently running 100% stable at 2.645Ghz, 1.45V. My idle temp is about 28 C and when both cores are running 100% ( I run an instance of Prime95 on each core ) I max out at about 45 - 48 depending on how warm my room is, and its usually warm enough to make me sweat in here. I have everything running inside a fairly modded Lian Li case. Cooling is provided by Swiftech Apex Ultra (Storm Waterblock) with the MCW55 waterblock for my ATI Video Card (also overclocked). I have been running Prime stable since about the beginning of Feb. The only time Prime is stopped on my rig is when I encode, or play games. Other then that prime is always running.

http://valid.x86-secret.com/show_oc?id=138795

I'm sure I could get more out of it, but my crap Mobo is holding me back. Stupid me sunk a lot o cash into an AGP card just before the switchover to PCI-E and the wife would kill me if I upgraded the Mobo, and VC. :( 
November 16, 2006 6:24:39 PM

This coming from a guy with "*Limits are made to be broken*" in his signature.... :lol: 
November 16, 2006 8:08:42 PM

Its true......but. does it say "hardware is meant to be destroyed" anywhere in there? -- Not saying I havent unintentionally (or on purpose :twisted: ) sent a few things to the graveyard. however I tend not to believe some of the extreme things I see posted.
!