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Best OC on air for Opty 165 vs. 175???

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May 9, 2006 7:35:39 PM

OK, my finger is on the mouse, ready to place an order. I realize there are no guarantees in life, OK? I'm just wondering what kind of OC to expect with air cooling for Opty 165s as compared to 175s. I'm looking to pop for the new DFI 3200XFire board. Sure wish Newegg would put it on sale - yea right. I've heard of 165s at 2.4GHz or so pretty commonly, which is about 30%. Sure, I've heard of them going higher on air. Can I expect to go much over 2.6 on a 175 with air cooling, like maybe a Zalman 9500? Thing is, the 165 is about $325 and the 175 is ~$500. That extra $175 could go a long ways towards some fast DDR. Too bad AMD isn't releasing the new Opty to fit AM2 right away. Then again, maybe in a year or two after all you DFI freaks get the new socket OC specs worked out, I'll ride in on your coat tails.

More about : air opty 165 175

May 9, 2006 8:34:15 PM

I have a 165 running at 2.8GHz on 1.36V and it loads at 49C with my scythe ninja....

I might try adding voltage later...in fact i havent even found the limit for this sucker at 1.36V!!!!

I only wish i had another multiplier like the 170 so its nicer to my RAM...but im pretty sure the 165's have some of the best steppings for OCing (and more common)
May 10, 2006 6:10:26 AM

I have an Opteron 175 running 24/7 at 240x11 for 2640MHz using 1.475 volts but have 4 sticks of Corsair Pro (2-2-2-5-1T) timed 2.5-3-3-8-2T and temps also stay below 49C.

I seem to hit a wall tho at 2.7GHz...but am definately stable at 2.64GHz. :wink:

With my HiS X1800XT I peak around 5100 3DMarks06.
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May 10, 2006 2:19:43 PM

Quote:
I have an Opteron 175 running 24/7 at 240x11 for 2640MHz using 1.475 volts but have 4 sticks of Corsair Pro (2-2-2-5-1T) timed 2.5-3-3-8-2T and temps also stay below 49C.

I seem to hit a wall tho at 2.7GHz...but am definately stable at 2.64GHz. :wink:

With my HiS X1800XT I peak around 5100 3DMarks06.


Cool! I wonder if there's a way past that wall... Have you tried different RAM? I have some OCZ DDR500 I was planning to use if I got an Opty. I'm not at all belittling 2.64, but this isn't the first time I've seen 165's listed with faster clocks than 175s.
May 11, 2006 12:34:41 AM

IM pretty sure having 2 RAM sticks is better than 4.

I might try and find the wall for my Opty 165 this weekend at stock voltage...then maybe add voltage until my temps get too high.

For the guy with the 175, try lowering voltage back down, and use the x10 multi with 280 HTT...or maybe your mobo is hitting its wall at 240 HTT?
May 11, 2006 2:54:25 AM

I need to try it with 2 sticks, but I also work with this PC, and do not have 2 1gig chips. But I have some of the best Samsung TCCD overclocking chips made, spd of 2-2-2-5-1T. But running 4 sticks limits me, but it is still pretty fast breaking 5k 3dMarks06 and over 10k in 3dMarks05.
Also a 32.36 sec SuperPi mod 1.4 time for 1M.

I have had this memory up to 270MHz, and others have had same memory running at 325MHz on very same mobo. An A8R32-MVP.
Also, I can do 2750MHz with 4 sticks, but not as stable as I would like. I can run benchmarks, but after a few I will get a hang.
2.64GHz is rock solid tho.
May 11, 2006 3:56:12 AM

Quote:
I need to try it with 2 sticks, but I also work with this PC, and do not have 2 1gig chips. But I have some of the best Samsung TCCD overclocking chips made, spd of 2-2-2-5-1T. But running 4 sticks limits me, but it is still pretty fast breaking 5k 3dMarks06 and over 10k in 3dMarks05.
Also a 32.36 sec SuperPi mod 1.4 time for 1M.

I have had this memory up to 270MHz, and others have had same memory running at 325MHz on very same mobo. An A8R32-MVP.
Also, I can do 2750MHz with 4 sticks, but not as stable as I would like. I can run benchmarks, but after a few I will get a hang.
2.64GHz is rock solid tho.


I think that maybe the 165 and 170 have the best steppings on them...or at least the least amount of bad steppings... because i got to 2.8 VERY easily. But in my regular operating state i run it at 2.2GHz because at 2.8 my mobo freaks out (near limits at 314 HTT) and the next best mem divider for my ram puts me at 2.2...would really rather run at 2.6 all the time but i feel that my RAM performance is more important.
May 11, 2006 4:01:58 AM

I feel sure I could break 2.8 by just removing two RAM chips and tweaking memory settings a bit. 4 sticks really impact performance when overclocking, and I know for fighting with timings trying to find the lowest stable with the highest overclock.
I still have room for improvement, but have not taken the time to remove ram to find out top end... But I like running at higher multipliers, and 11x seems like a better platform to reach 2.6GHz and above than 10x does.
!