Well...i no longer ocing the 9850BE...so now im running at stock with a MSi K9A2 platinum with bios 1.4.
I was wondering can i undervolt the 9850BE from the current vcore to a lower one which still maintaining at stock speed???
Well...i no longer ocing the 9850BE...so now im running at stock with a MSi K9A2 platinum with bios 1.4.
I was wondering can i undervolt the 9850BE from the current vcore to a lower one which still maintaining at stock speed???
i7 4770 | 24GB | Z87 Mpower | 1070FE | 512GB/1TB/2TB | WiNDy FC500 | 2713hm | 2.0 | 650w
Try? Please do, and report back. I don't know anything about the K9A2 BIOS, but it might support undervolting, or you'll have to use a program like RMClock, or CrystalCPUID.Originally Posted by ragnarok95
You should .... in fact, how far you go will be an indication of how tightly AMD might be binning the processor.
I suspect 0.1-0.3 volts, try, the worst that can happen is it locks up. You cannot damage the CPU but supply too little voltage.
Jack
One hundred years from now It won't matter
What kind of car I drove What kind of house I lived in
How much money I had in the bank Nor what my cloths looked like.... But The world may be a little better Because, I was important In the life of a child.
-- from "Within My Power" by Forest Witcraft
Ok, tried. Stock is 1.288v, now using AOD, i set it to 1.2v. CPU-Z report at ~1.208 - 1.216v. Temp drop by 3 degrees as in coretemp.
Using K9A2 platinum and bios v1.4, the bios doesnt allow me to go below 1.3v....does it mean that it needed 1.3v to boot up? Or other bios version able me to go below 1.3v in bios??? I have yet to test bios v1.5 however.
Im using AOD to adjust and auto load when its in window.
i7 4770 | 24GB | Z87 Mpower | 1070FE | 512GB/1TB/2TB | WiNDy FC500 | 2713hm | 2.0 | 650w
K9A2 will not let you under volt (on bios 1.2-1.4 tested) wouldn't under volt on my 9850BE nor my 9550
Ok, i undervolt further now to 1.2v using AOD. CPU-Z reports ~ 1.180 - 1.196v. Thats a drop of 0.1+v with a reduce in temp.
I like!
i7 4770 | 24GB | Z87 Mpower | 1070FE | 512GB/1TB/2TB | WiNDy FC500 | 2713hm | 2.0 | 650w
I run mine at 2.8ghz @1.2375v since the day I bought it
SuperMicro X8SAX
Xeon 5620
12GB - Crucial ECC DDR3 1333
Intel 520 180GB Cherryville
Areca 1231ML ~ 2~ 250GB Seagate ES.2 ~ Raid 0 ~ 4~ Hitachi 5K3000 2TB ~ Raid 6 ~
Power (active power, i.e. loading) goes as the square of the voltage, if you reduce 10%, you are actually getting a .9^2 factor in power or a 20% reduction in power.
One hundred years from now It won't matter
What kind of car I drove What kind of house I lived in
How much money I had in the bank Nor what my cloths looked like.... But The world may be a little better Because, I was important In the life of a child.
-- from "Within My Power" by Forest Witcraft
Ok, playing with current vcore of 1.2v, able to play CnC3 no hang/restart/freeze up. Listening to music/movie ok too.
Mean i can still go lower....
Doing 1.18v now. CPU-Z reporting ~ 1.17v now.
i7 4770 | 24GB | Z87 Mpower | 1070FE | 512GB/1TB/2TB | WiNDy FC500 | 2713hm | 2.0 | 650w
Thanks everyone here for the input!
Now i lower it to 1.165v....
Man i really like this cpu even more now!
i7 4770 | 24GB | Z87 Mpower | 1070FE | 512GB/1TB/2TB | WiNDy FC500 | 2713hm | 2.0 | 650w
Doing a 1.15v now...
i7 4770 | 24GB | Z87 Mpower | 1070FE | 512GB/1TB/2TB | WiNDy FC500 | 2713hm | 2.0 | 650w
Ok, think i will stop here. Vcore at 1.125v.
Anyway, in AOD, under CPU VID, i set to 1.125v, CPU VDDC is showing 1.288v but its highlight in RED. IS it ok????
i7 4770 | 24GB | Z87 Mpower | 1070FE | 512GB/1TB/2TB | WiNDy FC500 | 2713hm | 2.0 | 650w
The program probably has limits, and you're at the bounds of those limits, so it's telling you there's a problem. But since you did this intentionally, don't worry. So, 1.125v? Have you stressed the processor? If you can get 1.125v stable, that's impressive. I wonder what kind of power consumption the processor is drawing.
Well...i ran a couple of games, play some music, watching movie, doing office work, a few tabs of IE running, doing what i normally do and i yet to get a freeze up.
i7 4770 | 24GB | Z87 Mpower | 1070FE | 512GB/1TB/2TB | WiNDy FC500 | 2713hm | 2.0 | 650w
I was playing around with this same concept on my SB750 board yesterday. I was trying to see the lowest possible working voltage for the chip, so I disabled three cores and clocked down to 1600MHz. I was able to run at 0.800V. Full load pulled just 18W off of the 12V rail. Idle was about 13W. Now that's entertainment.
Last edited by Particle; 08-10-2008 at 09:47 AM.
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Pardon the hijack, but could you describe step-by-step how you disable cores?I was playing around with this same concept on my SB750 board yesterday. I was trying to see the lowest possible working voltage for the chip, so I disabled three cores and clocked down to 1600MHz. I was able to run at 0.800V. Full load pulled just 18W off of the 12V rail. Idle was about 13W. Now that's entertainment.
undervolting is good fun
the older cores seem to have been much more tightly binned:
laptop 3400+ clawhammer stock 1.5V (89w DTR cpu)
2200mhz min volts = 1.45
2000mhz min volts = 1.175
thats some huge volts drop for 200mhz freq
desktop x2 6400be 3200mhz @ 1.275v down from 1.4 stock
LCB9E 0641 APMW @3100 1.65V Decapped ~50c orthos load, TDX+House Rad (passive!)+Eheim 1250, Abit AX8, 2*1gig Crucial PC4000 @ 221 3-3-3-8-1T
X4 940BE @ 3640 @1.475, Gigabyte GA-MA790X-UD3P, 4x G.Skill F2-8500CL5D-2GBPK @ 1110mhz 5-5-5-15 @1.8v, 3870XT
At least with Asus M3A32-MVP Deluxe you can do it via BIOS. Simple option for it.
I'm running a Phenom 9500 at 1.15, haven't pushed to see if it will go lower.
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