what's an acceptable vdrrop?

[nyker96]

I'm using a E2140 L2 with IP35-E (latest BIOS). Set the CPU voltage in BIOS to 1.365v but reads 1.312v loaded with ortho blend in CPUZ. I know there's always a vdroop with any m.b. but isn't this a little large? >0.05v !? What you guys think?

 

[Tempered81]

not bad, set 1.365 in bios, and watch cpu-z at ilde, and then again at load. If youre at load 1.312, then you probably idle at 1.32-1.34 in cpu-z. Sounds normal to me.

 

[n7]

Haha, that's nothing.

I set 1.525V in the bios just to achieve 1.425V under load.

 

[nyker96]

I hear you guys, but a .05 drop on load just seems so unreasonable, I don't remember years ago the vdroop is this much on the m.b. I wonder if the BIOS dudes can do some weaking and up the voltage on high load. I did a little digging, some say the PSU is the culprit, but I don't really dig that either.

 

[superstition]

I have an e2140 and my Gigabyte P35-DS3L is set to 1.350 and drops as low as 1.296 under Orthos. Worse yet, it has a higher voltage (1.31) when the multiplier is lowered to 6 to save power. It's ridiculous to have a processor run at a much slower speed and have the motherboard give it a higher voltage.

 

[aigomorla]

Originally posted by: n7
Haha, that's nothing.

I set 1.525V in the bios just to achieve 1.425V under load.

pencil mod FTW!

http://www.xtremesystems.org/f...howthread.php?t=116574

Post #17

 

[Mondoman]

Originally posted by: nyker96
I hear you guys, but a .05 drop on load just seems so unreasonable, I don't remember years ago the vdroop is this much on the m.b....

It's part of the CPU design. Check out Table 6 (p.20) in the "Intel Pentium Dual-Core Desktop Processor E2000 Sequence Datasheet." Under 75A load, the drop spec ranges from -0.1V to -0.15V below the VID value. -0.05V drop is "typical" for about a 20A load.

 

[n7]

Originally posted by: aigomorla

Originally posted by: n7
Haha, that's nothing.

I set 1.525V in the bios just to achieve 1.425V under load.

pencil mod FTW!

http://www.xtremesystems.org/f...howthread.php?t=116574

Post #17

Thanx, but i already had to RMA once due to a bios updating fuckup.

No voiding warranties for me, as i resell when done with stuff too.

I'm trying to find a P35/X38 that suits my needs, but thus far, i've realized no such board exists :frown:

 

[Tempered81]

what do you need out of a p35 that you cant find?

 

[Duvie]

Originally posted by: n7
Haha, that's nothing.

I set 1.525V in the bios just to achieve 1.425V under load.

I hear ya brudda!!!

My P5B deluxe was same way....The DFI board has a .03v drop from idle to load and about a .03v drop from what is set in bios and what shows up when you enter it

I set it to 1.4v and under load while running prime95 I will be at 1.33-1.34v

 

[n7]

Originally posted by: jaredpace
what do you need out of a p35 that you cant find?

Hah, i wondered if someone would ask.

The funny thing is, there are a ton of excellent motherboards out there, but they're all missing something or other.

My needs:

-P35/X38/X48

-Minimum 8 SATA, but ideally 7 SATA + 1 eSATA like my current board, since i need as many internal SATA, & one eSATA can covered for all my externals.
I don't really want fake eSATA though; i'd like true integrated eSATA.
Seems all i can find is either 8 SATA + adaptors or 6 SATA + 2 eSATA.

-Dual gigabit LAN, ideally on PCI-e

-higher TRFC options like 50+
Asus mobos are by far the best options for me in every way except this, since aside from the Maximus, i believe all the sub $250 ones only go up to TRFC 42 unless you set to SPD, which is the exact crap i have to do on this current mobo, & i won't tolerate it on an expensive new one.

-Decent IDE port placement.
Bottom of the motherboard is not decent; i don't want my IDE burner @ the bottom of the case; & no, i don't want a SATA burner, since that steals away another port i need for HDDs.

-Passive cooling all over; no fans allowed

-lots of 3 pin fan headers; & it'd be really nice if they were all controllable for speeds, unlike this mobo where most don't allow any speed control.

-Under $250

:laugh:

No such mobo exists, even over $300 :frown:

If it does, please show me.

 

[Tempered81]

if you need 8 sata, just get a sata controller card

 

[nyker96]

n7, the options you need isn't too common that's why they don't default to them. But you can easily solve them with expansions.
1. get a SATA card//IDE card for your IDE deviced. Some longer cable to support your expansions. Plus couple 5v->3pin adapter (I'm usingone now) then all you set to go. eSATA you already can get from several boards standard. dual megabit isn't very common on boards but you probably get it from nvidia designs. As for passive cooling for mb components you can definitely get your own aftermarket stuff that's much better than any stock can do. All this will cost ya some cash but if money no problem it's doable.

 

[n7]

Originally posted by: jaredpace
if you need 8 sata, just get a sata controller card

Hah, already have one.


Anyway, i know my choices rather well; didn't exactly expect you guys to be able to find a mobo that perfectly fits my needs, since there are none actually.

But i ordered a DFI P35-T2R yesterday...it is missing eSATA (will have to use adaptor card(s), & costs more than i wanted, but i'll see how it does.

 

[Idontcare]

n7 please checkout the P5E WS Pro.

I think it fits all your needs. I have one, so too does Yoxxy. PM either of us if we can help answer any specific questions about the board.

http://www.newegg.com/Product/...x?Item=N82E16813131244

 

[pm]

As Mondoman posted, this is normal and expected and is part of the specification. It's supposed to do this.

 

[Rubycon]

Originally posted by: Idontcare
n7 please checkout the P5E WS Pro.

I think it fits all your needs. I have one, so too does Yoxxy. PM either of us if we can help answer any specific questions about the board.

http://www.newegg.com/Product/...x?Item=N82E16813131244

I've been using this board for about a month now and it seems to work well. The VCORE actually increases a bit from idle to load. Check out the electrical specs and you will see why "vdroop" exists. :Q

 

[n7]

Originally posted by: Idontcare
n7 please checkout the P5E WS Pro.

I think it fits all your needs. I have one, so too does Yoxxy. PM either of us if we can help answer any specific questions about the board.

http://www.newegg.com/Product/...x?Item=N82E16813131244

I saw that board when looking thru options, but it's not available at the good Canadian etailers, & also is even more expensive [than what i ordered].

I hate how expensive good motherboards keep getting...i remember that $200 could get you a damn amazing motherboard a few years ago (or so it seemed).

Now it's $300 & up for truely amazing :roll:

Anyway, if i decide i don't like the DFI, there's one question i have regarding that Asus.

What's max TRFC (manually set; not via SPD or Auto)?

If it's 42 like the majority of other Asus boards, it's no good for clocking 2 GB dimms, & i run 8 GB.
If it's higher, then please let me know, & i might consider it the DFI i've order doesn't please me.

Thanx

Edit: PMed a couple of you, ty.

 

[Rubycon]

Just checked mine and the highest is 42. Latest BIOS.

 

[lopri]

Vdroop and fluctuation is one of the biggest factors that I'm still not convinced with ASUS boards, despite of many positive user reviews in recent years. I recently purchased a P5E-VM HDMI for a tiny system to check e-mails, etc. in the kitchen, and the vDroop on that board is as big as ~0.13V (plus slight fluctuation). Meaning you have to give 1.525V in the BIOS to get actual 1.4V under load. And ASUS has been touting this 8-phase VRM or some such thing that's supposedly supply more stable voltages..

I know there is a theory (or a whitepaper?) that says vDroop is intended feature for CPU safety, but even if that's the case I highly doubt that it should be where it is. DFI boards have been by far the best when it comes to solid voltages in my experiences. Bad Axe 2 with my E6600/E2140 shows 0.01~0.03 vDroop between idle/load, which in my opinion is a respectable job.

 

[Rubycon]

Vdroop is inevitable given the current draw. One cannot twist the immutable laws of physics. The boards that have less are compensating. My P5E-WS actually shows an increase of VCORE with increasing load. (this feature can be toggled in the BIOS).

 

[n7]

Originally posted by: Rubycon
Just checked mine and the highest is 42. Latest BIOS.

Ah ty.

Exactly why i chose a non-Asus mobo, since afaik, only their Maximus crap has the higher TRFC option.

My current Asus is the same max, which cripples overclocking Powerchips 2 GB dimms, & since playing with memory clocking/tweaking is one of my favorite things, it really frustrates me.

It seems every company but Asus offers higher.

Not a big deal for 97% of enthusiasts out there, but a big deal to me.

It's too bad too, since the board i wanted was the P5K Deluxe/Premium.
Both have everything i want, almost precisely, excepting their weakness with RAM subtimings...




And on topic, i realize vdroop is a normal natural thing, but it's not something i appreciate as an overclocker.

 

[Rubycon]

Perhaps the BIOS can be edited to allow higher settings?

BIOS editing is something I have not attempted since socket 370/slot-a/socket-a days so I don't know the code but the risks are probably less since recovery is much easier than it was then. I could not tell you how many times I hotflashed abit KT-7's. :Q

 

[lopri]

Originally posted by: Rubycon
Vdroop is inevitable given the current draw. One cannot twist the immutable laws of physics. The boards that have less are compensating.

So there is no room for quality-control or better components, other than compensating? Out of curiosity.

 

[n7]

Originally posted by: Rubycon
Perhaps the BIOS can be edited to allow higher settings?

BIOS editing is something I have not attempted since socket 370/slot-a/socket-a days so I don't know the code but the risks are probably less since recovery is much easier than it was then. I could not tell you how many times I hotflashed abit KT-7's. :Q

I'm sure it could, but unless there's someone dedicating a lot of time to mod every new bios that comes out, it's not a remotely reasonable option.

I remember modded bioses all over the place back in my s754 Neo2 days, & earlier with my ECS K7S5A Pro, but it seems like no one does modded bioses much anymore.

If someone with influence like Gary from AT's reviews could contact Asus & say hey wtf, why are you guys behind everyone else selling mobos & not including TRFCs of up to around 70, they might do something about it, but otherwise i have no hope.

This is a very little known issue too which doesn't help.

I'm one of the few people preaching the importance of this, since i've seen firsthand how huge the difference it makes is.
Most people barely know how to set their primary RAM timings though, nevermind their subtimings.

It's becoming more & more apparent how important some are though, like TRD when it comes to performance & clocking (huge differences), & TRFC specifically for 2 GB dimms using Powerchips (most good ones do now).