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Safe Overclock for Stock Phenom II X3 720?

Forum Overclocking : AMD - Safe Overclock for Stock Phenom II X3 720?

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CatfishRes   03-11-2009 at 05:20:11 PM

Hi there, I recently got the Phenom II X3 720 and while the stock performance is a big improvement over my previous P4, I wanted to try and get a little extra performance out of it. I only have the stock fan for now (sometime in the future when money is more abundant I'll spring for a better one), so I don't expect a huge improvement. So does anyone know a nice safe multiplier and speed to use for a stock-fanned 720 without risk of damaging the processor? I'm going to experiment conservatively later but It'd be nice to know the limits from other users here.

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PsychoSaysDie   03-11-2009 at 09:31:06 PM
- 1 +

16 X 200


Monitor temps afterwards

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stevensl2   03-12-2009 at 09:25:08 AM
- 0 +

ah why dont you upgrade your cooler first, overclocking a little bit isnt gunna do anything you can see

------------------------------ Core I7 920 @ 3.66ghz | Xfx 4870 1gb Tri-Fire | DFI Lanparty x58 UT | G.Skill Trident 3x2gb @1834mhz | Asus Xonar Dx | Coolermaster Ultimate 1100w | Coolermaster Storm Sniper case | BenQ E2400HD 24inch 1920x1080 | Thermalright TRUE Push/Pull Fan |
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ChronoBodi   03-29-2009 at 01:03:10 AM
- 0 +

i was wondering also, in the BIOS settings for multiplier, is it 16 or 15.5?

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computabug   03-29-2009 at 03:27:20 AM
- 0 +

Like PsychoSaysDie has said, an increase of 400mhz for Phenom II chips is just right; probably rise temps around just under 10 celcius. Raise it to 16, OCCT for around 5 hours (or until you're comfortable) and raise it some more if you don't mind warmer temps :) I'd stop at 45 celcius tops... stopped at 39 celcius with my Phenom II.

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ChronoBodi   03-30-2009 at 01:01:43 PM
- 0 +

hmm... what temp monitoring program were you using?

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ChronoBodi   03-30-2009 at 08:33:10 PM
- 0 +

ok, i did a noob mistake, i mistook "5" as "15" and i actually underclocked it too low, causing my system to freeze. Luckily, it worked fine after that, back to stock speed.


Message edited by ChronoBodi on 04-15-2009 at 02:54:55 AM
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goonting   04-05-2009 at 02:32:58 PM
- 0 +

Buy a decent Heatsink and fan.... i'm planning of getting the same chip with Xigmatek Achilles

------------------------------ Intel Pentium 4 630 3.0Ghz Shuttle XPC SB81P(intel 915G)
Patriot Dual Channel 2GB DDR400: Raid0 640GB 2pc WD3200AAJS
Powercolor ATI Radeon HD3870 PCS 512MB DDR4
http://valid.x86-secret.com/cache/banner/414710.png
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jaimegmr   04-07-2009 at 09:58:19 AM
- 0 +

The highest I ever tried going with the stock heatsink was 3.2GHz (16x multiplier) with no voltage increase. I could have probably gone higher but I didnt try it.

Once I got a big heatsink, I upped the multiplier to 17x and it is stable at 3.4GHz with no voltage increase whatsoever. (still at stock 1.3V). Ive tried going to 17.5x but it is not stable.

Reply to jaimegmr
eagleowl   04-07-2009 at 05:57:00 PM
- 0 +

I'm currently at 3.4GHZ stable. I don't know why but when I made the jump from an ECS 780 board to the Biostar 790 - the stability jumped from 3.2GHZ to 3.4GHZ. This OC is on the stock heatsink but the case has 2 80mm rear exhaust fans & 3 aftermarket 120mm fans (1 on each side & 1 directly over the stock hs & cpu fan). The cpu is staying steadily between 27 degrees and 32 degrees Celcius.


Message edited by eagleowl on 04-07-2009 at 05:57:32 PM
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Summer Leigh Castle   04-08-2009 at 12:47:03 AM
- 0 +

Safe over-clocking is relative to the user so IMO stability is my measurement of safe.

My 3x cores stability (4hrs of OCCT/Prime95) list using only multipliers + S1283v cooler:

Stock voltage (1.325v) @ 3.3
Light voltage (1.35v) @ 3.4
Medium voltage (1.40v) @ 3.5
*High voltage (1.45v) @ 3.6
*Max voltage (1.50v) @ 3.7

*Significant temperature jump at 3.6ghz.

One thing to note is AMD's website indicated that max voltage for the AM3 720 CPUs is 1.425v. I'm current running 4x cores with 1.40v @ 3.4 to keep the heat down.


Message edited by Summer Leigh Castle on 04-08-2009 at 12:48:04 AM
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ChronoBodi   04-15-2009 at 01:17:49 AM
- 0 +

i'm on 3.2 ghz at stock voltage and stock fan, and that's pretty much it if you don't fiddle with the Voltage or replacing the stock fan.

Reply to ChronoBodi
ltwo   06-07-2009 at 04:22:39 AM
- 0 +

my Phenom II 720 is currently on 3.2GHz (200*16) and on Auto CPU voltage. ran prime95 for about 8 hours without any problems. just wondering if its safe to leave the voltage on Auto ?

Reply to ltwo
XtremeOC95   08-22-2009 at 02:27:02 AM
- 0 +

I have my Phenom II x3 720 BE running stable at 3.67 i jsut applied some as5 to teh heatsink instead of that stock garbage and its running 35 C idle and 52 tops after 5 hours prime95
forgot to mention cpu is at 1.5v stable at 200x18. runs decent at 200x18.5 but not for too long at max load


Message edited by XtremeOC95 on 08-22-2009 at 02:29:06 AM
Reply to XtremeOC95
yukss   11-10-2009 at 02:06:17 PM
- 0 +

mine so far

http://img260.imageshack.us/img260/7864/37ghz.jpg

http://valid.canardpc.com/show_oc.php?id=818210

[url=http://valid.canardpc.com/show_oc.php?id=818210]http://valid.canardpc.com/cache/banner/818210.png


Message edited by yukss on 11-10-2009 at 02:08:42 PM
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