Whats the most voltage i can feed my AMD 620?

[LOUISSSSS]

New AMD x4 620, whats the max voltage that i can/should go for?

Default is 1.4vCore, right now i'm at 3.120ghz @ 1.4vCore in Bios (13x240)

 

[LoneNinja]

Personally I've got 3.5Ghz @ 1.45V, most of the reviews didn't use 1.5V, and I wouldn't recommend going over 1.5V.

 

[heyheybooboo]

AMD Spec: 0.925-1.425v

 

[LOUISSSSS]

so little room to work with, 1.425???

 

[manimal]

On my amds I didnt like going over 1.45. I did push my 955 to 1.5 for benches and the 200 mhz extra didnt do squat for me. Pushing the NB higher did much more than clock once I hit 3.8

 

[filibusterman]

Is there a reason for wanting to go higher than your 3.1GHz? I like it for DC but for anything else the excessive heat and power usage are not worth a few MHz IMO. My PII 945 was very stable at 3.6 but for extended crunching It was not happy so the voltage drop and 3.49 @1.36V is respectable for not having to fool around further...also temps are way lower which will be a plus come summer.

Back when I cared more my e4300 whould have gaps in the fsb that would not work but above those gaps it would work fine (I don't know if this is the case for these amd quads though).

Does your mobo support lots of dividers for the ram? This can also affect stability. I learned this the hard way with a new 775 mobo I purchased which limited my e1400 cele to 2.5 instead of the 3.3GHz I got on a quality board I sold . I am sure there are other factors but again I am less ambitious now and always under the schedule of the next crunching contest!

Yes 45nm should not go above 1.5V !

 

[soccerballtux]

default is 1.4v, wow that's high. Interesting.

 

[formulav8]

I've pushed a PII based 5000+ X2 (2.2ghz) to 1.5xv and a SempronII to 1.55v before. Although its wasn't left for really long periods of time at that voltage



Jason

 

[LOUISSSSS]

thing is, i haven't seen my CPU break 39c yet. Whats wrong? my room temp is 70F, and my temps (dare i say) are too good. i went to 1.45vCore and tried 3.4ghz. it was unstable, and i dont know how to fix that, but my temps were in the mid 30's running linX for an hour.

 

[dark0anima]

thing is, i haven't seen my CPU break 39c yet. Whats wrong? my room temp is 70F, and my temps (dare i say) are too good. i went to 1.45vCore and tried 3.4ghz. it was unstable, and i dont know how to fix that, but my temps were in the mid 30's running linX for an hour.

did you use acc? cause that messes up wit the temp monitor

 

[LOUISSSSS]

ACC on = messes up temps?
or vice versa, or what? i dont remember anything related to ACC in my bios, where can i find that?

 

[Hyperlite]

You can play around with it forever. i have. i think at the moment, i'm running 3211mhz 1.425vcore, DDR31600 @ 1646 9-9-9-24, 1976mhz NB and 1976 HT. I had it running for a few months at 3401mhz, 1.45vcore, DDR3 @ 1450mhz 7-8-8-20 1.8vdimm, 2350 NB, 2100HT. It really wasn't worth the stress of tuning it and the stress on the system. the faster settings were good for about 2 Gflops in linpack...

I haven't run linpack @ 1.425vcore, but at 1.45, they would rocket right up past 70C in 70F ambient. I'm pretty sure i would be stable at 1.4vcore, i just keep forgetting to set it. In other words, the stock cooler blows. Your temps aren't all that surprising.


edit: if you have ACC enabled, temps will read 0, so i don't think that's an issue.

 

[nyker96]

I think 1,5 is max although 1,45 should be enough for most situations.

 

[LOUISSSSS]

if i'm unstable @ 1.45vCore @ 265x13 = 3.445ghz, what should i be looking at to fix?

my ram i can set to under DDR2 800 speeds, so would this rule out my ram being unstable?

I can also lower my HT speed to under 2000mhz, ruling out the HT link?

 

[Hyperlite]

if i'm unstable @ 1.45vCore @ 265x13 = 3.445ghz, what should i be looking at to fix?

my ram i can set to under DDR2 800 speeds, so would this rule out my ram being unstable?

I can also lower my HT speed to under 2000mhz, ruling out the HT link?

It's probably just the processor. volts doesn't solve everything. I max out at about 3450 @ 1.5 vcore.

 

[hans007]

1.4 default is already way more than it needs.

i have a 620 and i've had 2 that work fine at 1.15 V some people have gone as low as 1.1 V

 

[LOUISSSSS]

whats the first thing to do when i'm getting instability and i'm already at 1.45vCore @ 265x13 = 3.4ghz?

If you guys want the rest of my bios settings i can get that too

 

[fffblackmage]

OCers club's Athlon II X4 620 review
They got up to 3.133 GHz on 1.5V.

PureOC's review
They got 3.73 GHz on 1.5V.

Seems like 3.4GHz on the Athlon 620 is pretty good already. My impression is that the HTT typically doesn't like to be OC'ed much. So it seems like even if the cpu clockspeed isn't the limiting factor, the probably HTT is.

You could try lowering the HTT multiplier to keep the HTT at or under 2GHz if you can and see if that will help with stability.

 

[Hyperlite]

It comes down to this: If NB and HT are ~2000mhz and RAM is in spec, give it 1.45v and see how high it'll go. On most AMD mobo's, it isn't difficult to single out the CPU. Once you find the limit of the CPU, which in most cases seems to be about 3.4ghz @ 1.45 volts, you can try and up RAM/HT/NB some.