running 133/166

[sandoz]

hello, I have the ECS K7S5A and Athlon XP 1800 with DDR 256 PC2100. I have flashed the cheepobios and tried 133/166 setting with safe timing. Everything was run fine, but what a dissapoinment that when I benchmark with sisoft sandra the memory performance was far far behind the 133/133 (full tweak memory setting). Is the asynchronomous mode in the SIS chipset really this bad? And in what maximum memory timing setting with this 166 Mhz? Also why the board is shown 100/133 in CPU PnP when i choose the 133/166 setting. Is it really work in 100/133?
Thanks.

[atbo]

the chipset just isn't capable of runnig a-synchronous in a proper way. The bios displays the a-sync setting as 100/133 just as an indicator that it is in a-sync mode, not as actual speed when set to 133/166. Don't know about the best setting for 166.

[bluetooth]

So does Nforce2. [img]smile.gif[/img]

[SJP]

I've never heard of a board which does run async well. Consider the physics:

CPU clock at 133MHz, Memory at 166MHz. The memory can only actually transfer on clock cycles which coincide with CPU clock cycles, the rest of the time the memory waits.

Stick with Sync, and run at 138 or 143MHz FSB/Mem.

[sandoz]

well, I have a problem with heat in my athlon xp, the temperature if in full loaded app. can reached 63degrees!! so, I don't even think want to o/c this proccessor. The other way that I want to try speed up my system is to increase the memory bus, but since the async mode is slower than sync mode, so maybe I just to stick this setting (133/133)

[guni]

Or just spend 10$ in a better CPU cooler. And call Guiness book, I´ve never seen a XP running @ 63C! Are you sure that you´ve a fan on the HS??? :D

[Legend911]

Oh my God 63c!!!!!!!!!!!!!!!! I have had mine up to 52c before and i thought that was smoking. hmmm yes put a better HSF on there and cool that thing off immediately. More fans!!!!! cool your room.

[sandoz]

well, that's not strange though to reach 63degrees.
First I live in Indonesia, which wheather is hot man
Second I don't put my pc in a cool room with air conditioner. Just place it in my living room.
But, I already have a fan that spins up to 7500 rpm, and while in 63 degrees it spins up until 8000 rpm.
This is my problem that gave me a headache, Is xp is really that hot, or maybe applied a thermal paste will help?

[guni]

Trust me, it´s very strange. You´re gonna fry your CPU with this temps!
You´ve a very bad HS, or a little one, or it´s attached in the wrong way. And also a very noisy fan...It seems you´ve a B52 in your living room, right?
Buy a huge HS (copper or alumminium with copper base) with a 80mm fan @ about 3000rpm (it´s enough) and attach it with thermal paste.
I recommend you the TITAN TTC-D5TB
It´s silent and cheap (about 10$) and I´m running a XP1700+ @ 11x166Mhz under 40C full load with it.

EDIT: the temp sensor is UNDER the CPU, so you´ve to add 10-15C to your temp readings.
Your CPU´s running about 73-78C!!!
Try removing your case side and improve your case airflow with some 80mm fans and rounded cables.
Hope this helps. [img]smile.gif[/img]

[sandoz]

yeah that's right, it's very noisy. I think the heatsink is quite big, and when I touch it, feels warm, do you think that maybe something wrong in the installment of this hs?
What???? must add 10-15c for the real temp? I can boil an egg in my xp!!!! Sounds like I must take some action right away !!
anyway, thanks for your suggestion guni!