Odd bus speeds on Athlon64 3000+

[drvarunmehta]

I can't seem to understand why the bus speed is 199 MHz rather than 200 MHz. I haven't changed anything from the BIOS and my mobo dosen't even support OCing. See the config in the siggy.

[akshayt]

Was this from the time of purchase or has it happened out of the blue?

Is the PC performing as fast as it should?

Check these things with some other tool or software as well.

If 'Yes' to these 2 questions:

Enter bios and reset the settings, this should reset the voltage to auto and take up around 1.4V and it would change the multiplier to 9x. Other things are fine anyway.

[dOm1naTOr]

U have underclocked your system. The cpu is running in .99 Ghz instead of 1.8 Ghz. U r getting only the perfomance of a sempron 2600+ by now.
Do as given below.
Get into ur bios.
Navigate to CPU multiplier and set it to 9x and cpu bus speed to 200Mhz. So u get the original speed of a 3000+, ie 1.8Ghz. (200x9).
Anything higher than that ic ocing, like 10x multiplier and 200 bus, so effective 200x10=2.0Ghz. Or multiplier set to 9x and bus to 225, so effective 2.05 Ghz. Like that.

U SHOULD AT LEAST SET THE ORIGINAL SPEED OF CPU, ie MAKE IT TO 1.8Ghz.

[samrulez]

Originally Posted by aravind_n20

U have underclocked your system. The cpu is running in .99 Ghz instead of 1.8 Ghz. U r getting only the perfomance of a sempron 2600+ by now.
Do as given below.
Get into ur bios.
Navigate to CPU multiplier and set it to 9x and cpu bus speed to 200Mhz. So u get the original speed of a 3000+, ie 1.8Ghz. (200x9).
Anything higher than that ic ocing, like 10x multiplier and 200 bus, so effective 200x10=2.0Ghz. Or multiplier set to 9x and bus to 225, so effective 2.05 Ghz. Like that.

U SHOULD AT LEAST SET THE ORIGINAL SPEED OF CPU, ie MAKE IT TO 1.8Ghz.

lol........no.....he has enabled Cool 'n' Quiet.....

@drvarunmehta:.....is the 199MHz constant.....coz all the buses on the mobo/chipste keep jumping around 1MHz or 2MHz....

[dOm1naTOr]

Wow Ive heard dat cool n quite slows down ur machine, so never turned on...Its totally Bulls**t...who would wanna run a system at half the speed for minimising noise??????
Also @ drvarunmehta
Can u tell your CPU nd system temp at these extreme cool clocks????

Nd dun set your CPU voltage to 1.4. Set it to 1.3 or even 1.35 as AMD recomented one is 1.3v. Also please give your CPU fan speed at idle nd load.

[drvarunmehta]

@arvind: That's only Cool'n'Quiet doing it's job. the PC hits 1780 MHz under load. I'm not concerned with the clock speed. It's the bus speed thats odd.

@akshayt: It's from the time I bought the PC but I just never bothered about it till now. All benchmarks are as good as they should be.

[samrulez]

Originally Posted by aravind_n20

Wow Ive heard dat cool n quite slows down ur machine, so never turned on...Its totally Bulls**t...who would wanna run a system at half the speed for minimising noise??????
Also @ drvarunmehta
Can u tell your CPU nd system temp at these extreme cool clocks????
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C&Q is not constant......if u r only say..surfin the net using firefox then u don't need 1.8GHz....all u need is 1GHz....so...it slows down the procey so that it runs cooler and quieter.......

As soon as u run....F.E.A.R!! or and extensive application....it will pump it back to 1.8GHz.

[drvarunmehta]

CPU temps are quite low and fan speeds ar 2-3k rpm. I just restored the BIOS to factory settings but it dosen't help.
@arvind: Bus speed is a constant 199 MHz.

[dOm1naTOr]

@drvarunmehta
why r u concerned bout bus speed. Its 199 na nd its nomal is 200. U would never notice any diff if u make it 200 nd it won't give u even 1 single point in any benchmarks.

Dun know bout MSI RS 480 board but even ASUS A8N VM can crank bus upto 240 nd for A8NE u can crank upto hell!!!!400MHZ.

[deathvirus_me]

Well , at stock , my bus speed at 201.2 MHz .. so its quite normal for the bus speed to be 1 MHz more or less from the standard value ...

[dOm1naTOr]

Yaa dun worry bout bus speed, but what u have to concern is the CPU clock speed. Disable the cool n quite nd crank it up to 1.8.

@deathvirus_me
how did u increase the mem clock by 4mhz??Ive the option only of 433 after 400. Also plz give ur temp readings.

[deathvirus_me]

how did u increase the mem clock by 4mhz??Ive the option only of 433 after 400. Also plz give ur temp readings.

I downclocked to ddr33 , increased the FSB from 200 to 242 .. ram wen from 166 to 201.9 ... so its ddr404 now ..

[akshayt]

disable cool&quiet

[Rollercoaster]

1 or 2 MHz deviation is very normal....

[dOm1naTOr]

@deathvirus_me
but i usually keep mem clock at 400 nd increased the fsb, but on windows the mem clocks is showed as somethin around 400 only...why so??
But mem clocks won't make much perfomance diff as cpu clock, so not much worried of it.

[deathvirus_me]

but i usually keep mem clock at 400 nd increased the fsb, but on windows the mem clocks is showed as somethin around 400 only...why so??
But mem clocks won't make much perfomance diff as cpu clock, so not much worried of it.

Well .. ur mem. clocks directly affect the total mem. bandwidth .. for example , ddr440 will have better mem. read/write/latencies than ddr400 at stock ...

[mobilegeek]

Is Cool-N-Quiet recommened ?? ... I mean should we enable it .. if we just have to do simple work, no gaming n ripping?

[drvarunmehta]

If you aren't into heavy CPU usage like gaming or encoding, you should enable Cool-N-Quiet. It lets your processor run cooler and saves on power. You won't experience any decrease in performance either.

[mobilegeek]

generally the work is simple .. but sometimes the ripping n gaming
.. in that case just reboot n change everytime .. or keep it enabled

[drvarunmehta]

Keep it enabled. When it needs more power, the processor will automatically run at it's full potential.
Even if you want to disable it, there's no need to even reboot. You can change the settings from within Windows itself.

[dOm1naTOr]

Whuch is better:
DDR at 333 @2-3-2-6
or
DDR at 400@3-3-3-8 ???
Im running in dual channel.

[deathvirus_me]

ddr400 @ 3,3,3,8 ...

[dOm1naTOr]

Ya now Im at 230 mhz @3-4-3-7 in dual ch.
Now how to test/bench mem bandwidth [dun say sisoft sandra-its fails to open even after many reinstall].

[geekgod]

@aravind_n20
download everest..
there's an option to benchmark your ram..gives your read,write and copy bandwidths and latency..

however..i'd suggest you check you ram for stability using memest86+ at these speds, if you havent already done so.

[deathvirus_me]

Everest is the better option for me .. results are easier to compare ..

[mobilegeek]

Originally Posted by geekgod

@aravind_n20
download everest..
there's an option to benchmark your ram..gives your read,write and copy bandwidths and latency..

however..i'd suggest you check you ram for stability using memest86+ at these speds, if you havent already done so.

man memest86+ 3.5 takes ages to end ... how much time did yours took wen you checked ram, did it show errors

[geekgod]

it will take about 20 mins max..

in my machine it took about 17-18 mins for a single pass..i ran at least two passes.

the max stable clock i could get was 220..@2.5-3-3-8.above that it gave errors. might have gone higher if i had loosened them a bit more or pumped a bit more volts, but temps became very high.also it is better not to loosen timings too much on an athlon64 syste..the on die memory controller likes them tight..

also check if you are running the rams at 1T or 2T. you may get higher clocks at 2T, but that doesnt help performance.

it is mandatory to run memtest86+ if u r oc'ing ur ram. might very dangerous for your data if you are running ur system with unstable ram.

[deathvirus_me]

Well , 2T helps to gain in performance in these conditions :

(i) If ur using 2 GB or more RAM , specially or AMD system
(ii) If ur running 2 GB or more RAM in dual channel

Also .. 2,3,3,6 always won't perform better than 2,3,3,8 .. coz if ur running 2 GB or more in dual channel , and ur ram has a higher rating like ddr400 , then 2,3,3,8 will give better mem. performance ... and on nForce 4 chipsets , values above 8 may result in even better performance .. for example u can try 2,3,3,10 ...

[dOm1naTOr]

I get the read/write nd latency score like:
5365/1854/62.4ns
and the scores of
cpu qn/cpo photo wrx/cpu zlib/fpu julia/mandel/Sinjulia as:
4594/19100/30167kbps/2852/4342/2627
Is this scores good nd seems normal.

[geekgod]

Originally Posted by deathvirus_me

Well , 2T helps to gain in performance in these conditions :

(i) If ur using 2 GB or more RAM , specially or AMD system
(ii) If ur running 2 GB or more RAM in dual channel

Also .. 2,3,3,6 always won't perform better than 2,3,3,8 .. coz if ur running 2 GB or more in dual channel , and ur ram has a higher rating like ddr400 , then 2,3,3,8 will give better mem. performance ... and on nForce 4 chipsets , values above 8 may result in even better performance .. for example u can try 2,3,3,10 ...

what u said is not entirely correct..

command rate of 2T doesnt always translate into better performance..but in some cases into better stability. the performance lag..if any.. wont be noticeable if there is a large amount of ram available.
for athlon64 systems..lower command rate is always preferable..simply because of the fact that because of the on die memory controller,the time needed between successive commands is much less.so a 2T timing( 1 command per two clock cycle) is not necessary.its not that it is always bad..just not necessary.
intel on the other hand..locks the command rate to 2T on its motherboards as the system is more stable at that timing.

same for the tRAS timing..if it is too high, it is not that the performance will always be hampered.though in most cases it will be..bt the controller has to wait for more that it needs to. again that wait wont be evident for a large amount of ram.
__________
latency is high..but thats normal as you are using loose timings for the first three values. tighten them all within 2.5-3 and latency is bound to rise within 50 ns.
in my system with timings of 2-3-3-7..latency is 48.1 ns.

as for the other readings, please tell whether they are for read, write or copy. 1854 seems too low.