AMD Sempron 2500+

[21Outlaw]

I just bought and installed this processor but for some reason when booting it reads that it's running at 1.05Ghz. What should I troubleshoot to find out why it's only running that fast when it should be ~1.75Ghz?

 

[Vette73]

They Sempron has a 166Mhz FSB, you are running it at 100Mhz. Change the Bus from 100 to 166 and you should be set as long as your Ram and Board can do 166Mhz

 

[21Outlaw]

I have 768MB of Micron PC2100 Ram; it should be good to go. I just bought a new MSI board that can do 400Mhz FSB so it's good to go as well. Time to go fux with the BIOS.

 

[21Outlaw]

The FSB was at 200Mhz, so I tuned it down to 166Mhz. Still reads 1.05Ghz. Any other ideas?

 

[SimsFreak]

Your multiplyer set right?

 

[Concillian]

Originally posted by: 21Outlaw
The FSB was at 200Mhz, so I tuned it down to 166Mhz. Still reads 1.05Ghz. Any other ideas?

The FSB was not at 200 MHz if your processor is at 1.05GHz.

Your RAM SPEED may have been at 200, but your processor has a 10.5x multiplier and 1050 MHz / 10.5 = 100. Your FSB is set to 100. Check the bios again.

PC2100 RAM will not necessarily run 166MHz, as PC2100 = 133MHz. However many sticks of PC2100 will overclock to PC2700.

 

[Vette73]

^


Maybe, but the thing I THINK may be happening is when he sets it to 200, the computer goes back down to 100 because of the ram I can;t see that ram running at 200Mhz FSB. Micron had problems getting their DDR ram up to 166 at first, let alone 200.

But is there a JUMPER on the board for the FSB or ONLY the Bios?

 

[Concillian]

I suppose it's possible that the BIOS doesn't know what the hell a Sempr0n is, so it runs it default at 100 MHz bus speed.

 

[jedcred]

What motherboard do you have? I know that MSI has just been adding Sempron support to their boards in their latest firmware releases. Try upgrading the BIOS, but be careful and follow all instructions carefully.

 

[21Outlaw]

I have this mobo:
http://www.msicomputer.com/pro...2_Delta-L&class=mb

 

[Vette73]

Here is the BIOS you should be running...

Bios update Version 5.8

This one support Semprons

 

[AkumaX]

if you set 200mhz in bios, that equals 400mhz (2 x 200, DDR dual pumped) PC3200, and there's no way that your PC2100 could possibly handle that (well, maybe), so i bet your computer is just defaulting it at 100 ( 2 x 100 = 200)

if you have PC2100 you'll need to run your cpu/mem ratio async, i think its 5:4 (5 x 33.33 = 166 = cpu, 4 x 33.33 = 133 mem, == 166/133) and your cpu will be at 333 (166 x 2) and your mem at DDR266 (2 x 133)

 

[21Outlaw]

Originally posted by: Marlin1975
Here is the BIOS you should be running...

Bios update Version 5.8

This one support Semprons

UPDATE:

I installed that update. I also switched out my 768mb PC2100 ram for 512mb PC2700 Micron ram. It's still only running at 1.05GHz. The boot and the properties when you right-click on My Computer still show it to be an AMD Athlon processor. Where do I go from here?

 

[Lithan]

set FSB to 166.

 

[21Outlaw]

Originally posted by: Lithan
set FSB to 166.

Done. Still running at 1.05 GHz.

 

[21Outlaw]

Any other ideas?

 

[AkumaX]

Originally posted by: 21Outlaw

Originally posted by: Marlin1975
Here is the BIOS you should be running...

Bios update Version 5.8

This one support Semprons

UPDATE:

I installed that update. I also switched out my 768mb PC2100 ram for 512mb PC2700 Micron ram. It's still only running at 1.05GHz. The boot and the properties when you right-click on My Computer still show it to be an AMD Athlon processor. Where do I go from here?

so when you rt click on My Computer it still says 1.05ghz? hmmmm...

do you have a digital camera? can you post screen shots of the bios setting you are setting?

maybe we should try smaller steps, 133/133 or something, that should equate to 1.4ghz

try resetting the cmos jumper on the mobo and starting from scratch; when you boot up your mobo should auto-recognize your pc2700 memory and should display ddr333 (which is 166)

 

[Budman]

Originally posted by: 21Outlaw
Any other ideas?

look in the manual, page 3-12 ,Advanced chipset features of your bios,

CPU FSB Clock [100 MHz]

change it to [166 MHz]


You may have to set system performance to MANUAL before it will allow you to change it.

 

[Cheetah8799]

When you get Windows up, download and run CPU-Z. Then take a screen shot of what it detects and post it here. It will help us figure out what might be wrong.

 

[21Outlaw]

Here's some info for you to take a look at.

http://silvergsx.netfirms.com/cpuz.html
http://silvergsx.netfirms.com/ss.html

 

[fishmonger12]

Front Side Bus Frequency 99.2 MHz

still set at 100... clock gen says the same thing

you've probably been changing the ram frequency. there's two different frequencies, ram and front side bus. i dont know your specific bios, but that's probably what your problem is.

unless you tried setting it at 166 mhz then changed it back when it didn't work. let us know.

 

[21Outlaw]

I changed my settings to Manual and set the speed to 166MHz. And when I go into my BIOS, it reflects the same thing. I'll reboot and do it again under Auto and put it at 166MHz again.

That's what I don't get, I change the FSB to 166MHz and when I get to Windows it displays it as 100MHz.

FWIW, my ram shows up as 333MHz.

 

[21Outlaw]

Originally posted by: AkumaX

Originally posted by: 21Outlaw

Originally posted by: Marlin1975
Here is the BIOS you should be running...

Bios update Version 5.8

This one support Semprons

UPDATE:

I installed that update. I also switched out my 768mb PC2100 ram for 512mb PC2700 Micron ram. It's still only running at 1.05GHz. The boot and the properties when you right-click on My Computer still show it to be an AMD Athlon processor. Where do I go from here?

do you have a digital camera? can you post screen shots of the bios setting you are setting?

Yes, I have a digital camera but no USB cord. I ordered one last week from Dell and it shipped today so I'll be updatting just as soon as I can.

 

[gwag]

some boards have a jumper for 100 only and 133,166 is there a fsb jumper on the board?

 

[AkumaX]

http://silvergsx.netfirms.com/cpuz.html

your ram setting's right (it even showed it at 166), which is pc2700 (333mhz, 166 x 2)


http://silvergsx.netfirms.com/ss.html

i know it might seem counter productive, but i suppose you could use clockgen to manually set it to 166 ( or higher :evil: ) in windows. you might need to set your ram to 100 also in bios so it'll go up together ( i notice in the cpuz shot that you set the ram timing to 3:5, do 3:3, 4:4, 5:5, or 6:6 (they're all the same) and use clockgen)