well according to lost circuits venice cores (what is the name for a venice cored sempron anyhow?) run 24% less power than same-clocked winchestors.

76% of 23 watts is around 18 watts

Not really.
A64E 2.4 GHz: 30.8 W >>>> 2.2 GHz: 28.2 W
A64D 2.2 GHz: 31.6 W

That's a 12 % difference.

But, you didn't answer my question. Why should you change? Isn't your current one good enough? Don't you like it? Is it really too hot? Do you think that a new one would make that big difference in real world?

Have you tried undervolting?

...and yes, I know that "bleeding edge is never cheap...blabla.."

when i say my sempron is currently running at 1.008volts that's b/c i undervolted it.

i bought a soltek SL-K8AN2E-GR SOLTEK and undervolted it from the bios at boot-up. it's a palmero core. i bought a SL-K8AN2E-GR SOLTEK due to spcr's recommendation. doesn't have fan control.

well strictly speaking i don't have to buy it but at $80 sempron's aren't very expensive. one way to think of it is if i can undervolt a venice core more deeply than a winchestor, and say i can sell my sempron for $60 used, then to spend $20 for a more undervoltable cpu is a lot like buying a better heatsink - except it adds sse3 and supports t1 rather than t2 timing.

dan are the 90nm Semprons venice core or winchester? i thought it was winchester?

strictly speaking winchestor is the D-stepping and venice E-stepping apply to the socket 939 cores, i believe.

mine is 90nm 754 with NO SSE3 and T2 timing. presumbaly an E-stepping sempron would support SSE3 and T1 memory timing. it' s D0 stepping.

it's my understanding it's "palmero" but it's not clear to me what an E-stepping sempron would be named.

theoretically speaking, buying an improved core cpu would be comparable to buying a better heatsink in cooling.

i think i heard there are venice core Semprons


http://www.amdcompare.com/us-en/desktop/details.aspx?opn=SDA3300AIO2BO
http://www.amdcompare.com/us-en/desktop/details.aspx?opn=SDA3100AIO3BO
http://www.amdcompare.com/us-en/desktop/details.aspx?opn=SDA3000AIO2BO
http://www.amdcompare.com/us-en/desktop/details.aspx?opn=SDA2800AIO3BO
http://www.amdcompare.com/us-en/desktop/details.aspx?opn=SDA2600AIO2BO
http://www.amdcompare.com/us-en/desktop/details.aspx?opn=SDA2500AIO2BO

When i run samba with the same cpu specs as mentioned in my earlier post it reports either 18W or 28W, maybe because of CnQ if samba momentarily puts on 100% load?

Not sure how this helps but for the sake of 5W is it worth upping to a venice core.... having said that they are very nice CPUs

Dan: I think you should wait for Sempron with 64 bit extensions, they should arrive soon, 1-2 months.

You know that SiSoft Sandra is not reliable in every way. If you're trust LostCircuits' data just like I do, then your CPU draws 11.9 W (2.2 GHz, 1.4 V, 31.6 W @ 1.6 GHz, 1.008 V), and a stepping E counterpart would use 10.6 W (2.4 GHz, 1.4 V, 30.8 W @ 1.6 GHz, 1.008 V), big deal.

Personally I couldn't care less about SSE3, I wouldn't have any use for it at all.

All S754, 90 nm Semprons are called Palermo so far for some reason.

i agree with you 100% 1 watt isn't a big deal.

i would love to think my cpu is putting out only 12 watts, but when i turn the fan off with the stock heatsink the temps slowly climb over an hour from 28C to 50C (at which point i turn the fan back on) so i find it hard to believe it is only 12 watts as that would be Via C3 territory.

Hello Dan:

It takes an hour to get to 50C? With the stock HS -- in what case?! I'd say that it sounds like you are confirming the 12watts output! Just put a "real" HS on there, and/or get better case air flow -- and you'll run passive, I'll bet.

We're suspecting it's a BIOS "problem". Someone told me on the grapevine that this problem occurred after someone around here upgraded the BIOS. I had 1009 and went to 1014Beta. Neither of them work. I'm still looking for this posting.

I found Crystal had a very large lag when I used it. Sometimes it took 3 seconds to switch on. RMClock is much more responsive, but it has some setting which mean different things to what you think. Like maximum and minimum profiles are a lock to maximum or minimum.

I have mailed ASUS. I've put a note on
http://groups.google.com.au/group/alt.c ... board.asus
and also
http://www.xtremesystems.org/forums/sho ... hp?t=66279
But Xtreme takes 2 days to register if you want to help me *bump* those threads.

my SOYO TISU could stay cool at 45C with pure passive so i believe it's 10 watts.

the sempron will slowly climb to over 50C and continue so i believe it's 20 watts.

i don't know how to post pics directly on this website so i loaded it to my email profile here's my link
http://briefcase.yahoo.com/dhwang92

incidentally all of the newer components i bought due to SPCR's recommendation -- the seasonic tornado 300 watts, sempron 90nm, soltek gr motherboard for undervolting, nforce 3 passively cooled.

currently it's using amd-supplied retail stock heatsink and fan, running at 5volts.

also it's 87F ambient wise

hey dan, it sounds like you need an xp-120 or some tower passive cooler

thanks

i can hopefully passively cool a undervolted sempron 3300+ with good airflow in a antec BQE !

I was think along the same lines, so I've posted a question in the Gigabyte service center. All my previous questions got answered in the past, so I hope to know more about this soon.

And I do hope it's BIOS, since that is easy to change if they're so kind to provide a fixed version

Peter

Peter,

What version of the amdk8.sys device driver do you have? I find it very problematic to install a 2004 version. That's the most recent version I've managed to find so far.

Click on the processor driver in device manager etc.

I'm starting to wonder about the BIOS theory. I tracked down where the voltage and CPU multiplier were stored in the CMOS RAM [3E 3F], and then started to look for a way to disassemble the BIOS. Confronted by a bit of a brick wall with this type of reverse engineering, I started wondering what calls RMClock etc were actually using. I presume they start in amdk8.sys. So that could be half the problem. This is a highly undocumented area.

Hey Dan, here's a funny thought:

The waste heat of your PSU is probably more than your CPU power

lol thing is i don't think the waste heat is all that much, i dobut my psu is putting out much more than 60watts if

motherboard 20watts including memory
matrox g450 -- 5 watts according to matrox
hard drive -10 watts
amd cpu 25 watts

...probably around 75% efficiency at that power usage...so 20W. It's close

do you think my estimates are reasonable?

To: "Dan" <sickofspam@yahoo.com>
From: "Dennis Stellinga (Matrox Inbound Sales)" <dstellin@matrox.com> Add to Address BookAdd to Address Book
Subject: Re: ? about g450 power consumption
Hello,
The Millennium G450, under the most strenuous conditions, will draw 10 watts (9.8W max) The Millennium G450 normally runs at 3.3 volts but is backwards compatible with the AGP pro slot and will automatically switch to the required 1.5 volts when installed in a PC with a Pentium IV motherboard.

To: "Dan" <@yahoo.com>
From: "Dennis Stellinga (Matrox Inbound Sales)" <dstellin@matrox.com> Add to Address BookAdd to Address Book
Subject: Re: ? about g450 power consumption
Yes, approximately.

At 06:06 PM 03/13/2003, you wrote:

> thanks.
>
> i don't need a powerful 3d card. so i take it that
> typicall it draws just 5 watts? thanks.
>
> dan

From: "Dennis Stellinga" <dstellin@matrox.com> Add to Address BookAdd to Address Book
Subject: Re: 130nm?
Hello,
The Millennium P650 has passive cooling and has a power consumption of approx. 20 watts, standard for a video card of this caliber.

At 01:36 AM 23/10/2003, you wrote:

> hello,
> do you have any DVI card built on a 130nm fabrication?
> which DVI model has the lowest power consumption with
> passive cooling? (as my current self-built pc is
> silent).
>
> thanks
> dan


From: "Dennis Stellinga" <dstellin@matrox.com> Add to Address BookAdd to Address Book
Subject: Re: 130nm?
AGP 4X is synonymous with AGP Pro

dan the G550 has DVI and has similar power consumption to G450 i guess.
dan is your sempron socket 754?

yes it is 1.6ghz 256k cache model 2800+ 90nm palmero core. no sse3

i'm thinking of getting sempron 3300+ 90nm and undervolting like you

join the club. i would recommend that it is venice core. either dfi or soltek can undervolt.

None, AFAIK (have de-installed C'n'Q since it would only run in low-power mode and didn't ramp up under load). Did I mention I'm running W2K?

Got reply from Gigabyte, they state that below 1.1V is below spec and could cause system instability. I wrote back that I want to go below, just like overclockers want to go above We'll see what comes up. I asked the clearly this time if this was a bios limitation.

Peter

I asked ASUS and they said the same, even though I pointed out that the K8V lets you do it... I think it's a VIA chipset thing.

thought Sempron 90nm are their own cache reduced Winchester core or something? not Venice? if Venice what a bonus now!

Yes, they are available as both Winchester and Venice, and the Venice version are available as both 32 bit and 64/32 bit. So there are three 90 nm versions and they're all called Palermo (Well, at least the 32 bit versions for sure). Just make sure you get the 64 bit version.

More info here about Sempron 64. Some say that you'll be able to activate 64 bit mode on older Sempron K8. Now don't tell me I'm wrong because I don't say it works. I'm just the messenger!