REPORT WU-SPEEDS HERE !

NIMRUTH
NIMRUTH
Joined: 24 Feb 05
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I don't think the CPU is the

I don't think the CPU is the limiting factor. However your PC2700 RAM might be unless you are able to run it non-sync with the FSB. I can't look at it right now but I've got a Sempron 2200 box at home with an Asrock K7S41 but the non-GX version. The K7S41GX is rated to DDR333 whilst the K7S41 is rated to DDR400. The non-GX version is slightly dearer than the GX but still very much a budget board. I'm absolutely sure that I've got the home system running at 200mHz FSB but using PC3200 RAM.

The only difference between the K7S41GX and the K7S41 seems to be the onboard graphics. Are you using that or an external graphics card? In any case I think the problem you are having is more likely to be related to the lack of a PCI/AGP lock on these boards. It's not really documented in the motherboard manual (same for both MBs) but at certain FSBs the PCI and AGP busses will be in spec at 33 and 66 mHz and at other values of FSB they will be quite out of spec. When I was playing around with mine, I'm sure that it was locking up at 180-190mHz and OK at 200mHz or something like that. It was explained to me at the time that choosing FSBs of 166 or 200 would have the PCI/AGP busses close to spec whilst mid-range values like 180-190 would be quite out of spec and give problems. Have you tried 200mHz?

Also, using improved air cooling is a lot easier than water cooling. Just lapping the heatsink, using Arctic Silver and putting on a bigger faster fan can give you much better cooling. My cpu temp as measured by motherboard monitor is around 55C (summer - no aircon) and seems to be quite OK. It has been into the low 60s in a heatwave without locking up whilst running Seti. I try to keep below 55C and I'm sure it's OK at that level

Gary,

you are right, the diff between the gx and non gx version of the asrock MB is the fsb of 333 and 400mhz. However, if you raise the fsb to 200mhz, it will run at 400Mhz for the DDR, even if it is a pc2700 memorycard. The kingston seems to have no problem with that. If I try to run it at 210fsb, the system locks up just after the 'welcome" screen of windows XP. I guess It has a big deal to doi with the DDR ability to handle the 400+ fsb settings on a full load. It runs okay at 200mhz and CPU-Z tells me my mem is running at 400mhz at that setting. Now, the problem is that I get a sharp rise in temp as soon as boinc starts computing. CPU-Idle is kicking in all the time, it is set at 55C max. I do not dare to go above that for long crunching sessions. Sooo, the higher Clockspeed is surely faster, but the tempmanagers slow it down. Therefore I choose the 190FSB, it keeps the temp around 54C, without the loss of cycles involved with colling the cpu. it is faster.. the boinc does not count the realtime cpu usage, but the actual time the cpu was used for calculations.. the cpu idle time at higher freq is lost time, and therefore slower..

I`ll go get me some of that silverpaste to get a better thermal contact, maybe it will help..

Gary Roberts
Gary Roberts
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Joined: 9 Feb 05
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> I`ll go get me some of that

Message 5797 in response to message 5796


> I`ll go get me some of that silverpaste to get a better thermal contact, maybe
> it will help..
>

From quite a lot of experimenting here is my assessment of your most important cooling options.

1. Make sure you have a good supply of cool air into your case. You don't get much gain from increased airflow over the heatsink if the air is already too warm.

2. Make sure you tidy up your cables so as not to impede the airflow.

3. Get a 60 to 80mm adapter and use an 80mm good quality fan running at about 4000 to 4500 rpm to cool the cpu. That speed seems to give about the best performance to fan noise ratio. These three will get you about 6-9C cooler running under full load. You will do a little better if you use one of the top cpu coolers but these are quite expensive.

4. Get a small flat sheet of glass and buy some 800, 1200, 1600 grit wetordry emery paper (with plenty of water) and polish the base of a standard heatsink to make it as smooth as possible. Clean and dry with isopropyl alcohol for a grease free finish. Clean any previous thermal pad from the CPU chip. Polish surface with Isopropyl alcohol. Apply arctic silver 5 very sparingly as directed to both the top of the cpu chip and the HSF base. All this takes quite a bit of time and care and in my experience you will get a 1-3C improvement over the standard thermal pad if you are lucky. However it all helps.

5. Do not get overly concerned about the sudden increase in temperature when you start up EAH. Full load temps between 50 and 55C are not a problem. I won't normally go over 60 but here's what happened to me about a year ago. I live in Brisbane Australia which can have some very hot summer days. I was in New Zealand at the time and it was a Friday. I had about 8 machines running in an office which gets air-conditioned when the secretary arrives. She had not long arrived at work and extreme temps were predicted for that day. She had two young children at a primary school near her house. The school rang all the parents and said they were sending children home because of overheated classrooms and no air conditioning. The secretary, concerned for her children simply shut the office, turned of the aircon and went home. When I arrived back from New Zealand on the Sunday, 6 of the 8 machines were still running with CPU temps just under 70. It was still a very hot day. The two that had shut down were quite OK. They had a BIOS shutdown temp set at 75C which had been triggered. I still have all those machines running fine with no problems a year later. AMD CPUs are quite tolerant to temps around 60.

The secret is to keep the ambient air inside the case as cool as possible and let a beefed up CPU fan do its job. If you can get your setup to run at 200 FSB and temps around 55 - 58C you will be fine. Just don't skimp on your case cooling and CPU fans.

Cheers,
Gary.

Cheers,
Gary.

KWSN_Dagger
KWSN_Dagger
Joined: 22 Jan 05
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I run about 48 to 59

I run about 48 to 59 depending on WU and OC settings. 200 - 210MHz FSB. That's with stock cooling and 4 case fans. (3 in and 1 exhaust) That 60 to 80mm converter sounds good though, wonder if there would be any advantage to mounting an 80 mm over a 60 mm fan for a forced air effect.

Gary Roberts
Gary Roberts
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Joined: 9 Feb 05
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Credit: 109397750011
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> I run about 48 to 59

Message 5799 in response to message 5798

> I run about 48 to 59 depending on WU and OC settings. 200 - 210MHz FSB. That's
> with stock cooling and 4 case fans. (3 in and 1 exhaust) That 60 to 80mm
> converter sounds good though, wonder if there would be any advantage to
> mounting an 80 mm over a 60 mm fan for a forced air effect.

No, there's not. I have actually tried it. It performs badly :). There is actually some scientific reason for this to do with air pressure that I read at the time I was experimenting. Can't remember the details.

Your best result will be with a 4500rpm 80mm fan on top of an 80/60 mm converter. You actually do get good results from fast 60mm fans (5800rpm) but the fan noise is really starting to be annoying.

As far as case fans go, I've had better results from blowing hot air out the top back and not worring too much about about blowing in. It doesn't really matter where the cool air leaks in as long as the hottest air is being forcefully extracted. If you have more fans blowing in and building up positive pressure you may loose some of the cool air to case leaks.

CPU temps in the range 48 to 59 sound quite OK to me. Why don't you just leave everything as it is and just replace the CPU fan? You should get at least 5C temp drop or more. What is your ambient room temperature at the moment?

Cheers,
Gary.

Haydenlaw
Haydenlaw
Joined: 24 Feb 05
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Hi - I'm running a new AMD

Hi -
I'm running a new AMD Sempron 3100 - here's the info from my machine profile.

CPU type AuthenticAMD AMD Sempron(tm) Processor 3100+
Operating System Microsoft Windows XP Home Edition, Service Pack 2, (05.01.2600.00)
Memory 510.73 MB
Measured floating point speed 1670.89 million ops/sec
Measured integer speed 4574.31 million ops/sec

My time per work unit is about 7.5 hours.


RandyC
RandyC
Joined: 18 Jan 05
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> Hi - > I'm running a new

Message 5801 in response to message 5800

> Hi -
> I'm running a new AMD Sempron 3100 - here's the info from my machine profile.
>
>
> CPU type AuthenticAMD AMD Sempron(tm) Processor 3100+
> Operating System Microsoft Windows XP Home Edition, Service Pack 2,
> (05.01.2600.00)
> Memory 510.73 MB
> Measured floating point speed 1670.89 million ops/sec
> Measured integer speed 4574.31 million ops/sec
>
> My time per work unit is about 7.5 hours.
>
>
Hmm. My Athlon XP 2600 does much better:
Measured floating point speed 1850.6 million ops/sec
Measured integer speed 4442.28 million ops/sec
About 6 hrs 20+ mins per WU.

Seti Classic Final Total: 11446 WU.

senator2
senator2
Joined: 11 Nov 04
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> Hmm. My Athlon XP 2600 does

Message 5802 in response to message 5801

> Hmm. My Athlon XP 2600 does much better:
> Measured floating point speed 1850.6 million ops/sec
> Measured integer speed 4442.28 million ops/sec
> About 6 hrs 20+ mins per WU.

AMD model numbers are very confusing in a situation like this because they try to combine cache size, bus speed and processor speed in one number. A Sempron only has 256KB of L2 cache, but the socket 754 version has the DDR memory control on chip reducing memory latency and only runs at 1.8Ghz. An XP 2600+ is either 2.133Ghz, 512KB L2 cache with a 133Mhz(266DDR) or 2.133Ghz, 256KB L2 cache with a 166Mhz(333MhzDDR) bus. Those numbers seems reasonable for a 1.8Ghz AMD chip since lower latency/faster memory access isn't as important for E@H.

Tuis
Tuis
Joined: 24 Feb 05
Posts: 1
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3.2 GHz P4 HT, 2GB DDR2 SDRAM

3.2 GHz P4 HT, 2GB DDR2 SDRAM @ 533MHz, Win XP SP2

CPU's: 2
Whet: 1377
Dhry: 2613

My times are skewed because I typically play Battle for Middle Earth while SETI and Einstein are running (database work keeping me from activating my transferred account for SETI). SETI has been finishing under 4 hours on this comp. With my interruptions, Einstein is finishing in about 10-12 hours.

I'm no expert so I must ask: how does it stack up and could it do better?

Dominique
Dominique
Joined: 19 Feb 05
Posts: 66
Credit: 16797
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AMD Barton XP2400-M @2.09ghz

Message 5804 in response to message 5773

AMD Barton XP2400-M @2.09ghz 512k L2
512mb PC3200 ram
Whet: 1960.26
Dhry: 4710.78

E@H: 6 hr
S@H: 2.5-2.75 hr.
P@H: 55 min.
CPDN: a really long time


*I still know CRAP when I see it.

Evan
Evan
Joined: 23 Feb 05
Posts: 7
Credit: 117469
RAC: 0

The Athlon numeric

The Athlon numeric co-processor is twice as fast as the P4 co-processor, clock cycle for clock cycle. Also, the higher speed P4s will clock throttle under 100% CPU load unles they have very good cooling.

My Athlon XP 2700:

FPU: 2025.32 million ops/sec
Integer: 4919.23 million ops/sec

Time for a WU: 5:30 to 6:00 hours

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