nel

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I have a MUSHIN 533 MHZ DUAL CHANNEL 2 GIG. But after checking that to CPU-Z it only has a 266 max bandwidth, is this suppose to be normal or do I need to increase the voltage on the memory...
 

needbe

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I have 400 Mhz ram, and cpuz says 200 Mhz. I think it has something to do with double data rate, where it gets data on the pos egde and neg egde of the clock cycle.
 

BMFM

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It appears you've bought DDR2 533 modules.

If so, then you are OK; nothing wrong there.

When you see memory modules described as DDR2 533 (for example), the numbering actually refers to the number of micro-transfers executed by the memory. Being DDR (Double Data) it can send and receive up to 533 million micro-transfers per second at 266MHz. :wink:

Regards.
 
I have a MUSHIN 533 MHZ DUAL CHANNEL 2 GIG. But after checking that to CPU-Z it only has a 266 max bandwidth, is this suppose to be normal or do I need to increase the voltage on the memory...

DDR stands for DOUBLE DATA RATE, it runs as x mhz but offers twice the performance, so 266mhz DDR translates to 533mhz performance, thats correct.
 

nel

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Hi there, thanks 4 the response... but can u teach me how to set properly the timing of the ram I have...

this is what I have right now:
frequency (296.6 mhz)
fsb:dram (3:4)
cas# latency (4.0 clocks)
ras# to cas# delay (4 clocks)
ras# precharge (4 clocks)
cycle time {tras} (12 clocks)
bank cycle time {trc} (24)

My ram require a 4-4-4-12

Is the setting right now o.k.
 

ZozZoz

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YEs, the setting is fine, the 4 digits in ram description always refer to:

cas#
Ras# to cas#
ras# precharge
and
tras

You can try and lower timings in order to increase performance, but not every stick of ram can handle it. (unless you lower its frequency).
That also means, that if you overclock your ram, by increasing the Front Side Bus speed, it will automatically switch to higher timings, or you'll have to increase them manually.
 

nel

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wow, I thought higher number means a lot faster... So, which of the 4 I can possibly lower at least by 1. If you can help me to OC... it will be a big help, thnks...
 

ZozZoz

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I don't know much about overclocking ram, perhaps you should check the appropriate forum threads.
Value ram usually doesn't overclock well.
 
wow, I thought higher number means a lot faster... So, which of the 4 I can possibly lower at least by 1. If you can help me to OC... it will be a big help, thnks...

The timings are like delays etc - the lower the delay, the better! When your overclocking your ram, worsening your ram timings helps push the last few mhz out of your ram.
 

ZozZoz

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but beware, a few extra mhz at a cost of higher timings, can actually lower memory's performance.
fool around with the settings, record them, then benchmark to find the optimal ones.
 

bigsby

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I believe that tightening the Cas# first brings the most preformace, and then Ras# Precharge, and then Ras# to Cas# and then Tras is last. Not sure on the Ras# Precharge/Ras# to Cas# going before or after each other, but Cas# (the first number) is most important, and Tras the least important. After you've played with the other 3, then you can tighten the Tras as far as it can go.

Remember though to always test your ram settings with Memtest32. Download the Iso and burn it onto a disk or get the floppy version and after you've changed your overclock/timings, always run it through there for a few full passes before it's deemed stable.
 

Statross

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dont worry too much about reduciong timings...doesnt doo that much from 4 - to - 3...from 6 to 3 would be a 100% increase (half as many clock cycles to do things) but then you need double the frequency, too to get really double performance RAM... but there are other factors involved in system performance over all

CAS is what most poeple lok at but they all have definitions (i forget what they are)

but the timings are the amount of clock cycles it takes for something to happen

CAS is column access strobe (i think) and RAS is row access strobe..then another is to do with reading and another is overall

anyway, search google for CAS latency..or better yet search wikipedia.com for CAS latency it probably has all you need.
 

nel

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current setting now is:

frequency 223.9 rated fsb: 895.7
fsb:dram 1:1
ram timing 2-3-3-5
TRC 9 CLOCKS
its stable !!!
ORIGINAL SETTING: 4-5-5-13 @ 266 mhz
 

ZozZoz

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well, the resulting freq. is now 223.9x2 = 447 mhz, that's why it can handle lower timings. benchmark to see if that's actually faster.

do some thorough testing though. find a tool called S&M, do some ram tests to check stability. that way you don't need to find/burn memtest.
 

nel

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3d mark

original setting: 3995

new setting: 4127

I'm planning to increase the frequency a bit 'till it reach it peak...
Hey, ur from Russia for real, you speak good english...
 

ZozZoz

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That's not much of a difference. try increasing the FSB till the ram hits at least 500 mhz but with the new divider (and stock timings). Then gradually lower 'em, and test every time.

and yes, I am from Russia. high school in UK, and BA in Canada did the trick ))
 

nel

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I got the S&M running right now... done on cpu everything passed.... memory no error (done) load 75%...

I adjusted the fsb to 950 mhz and 237.5 for frequency with the same timing... it seems stable
 

nel

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3dmark: 4146

fsb: 950 frequency: 237.5
same timing: 2-3-3-5
fsb:dram 1:1
trc: 9

I have a p4 6XX H/T 800 fsb ,,, is it o.k. to make it 1000 fsb ???

btw, I have a cheap video card Geforce 600 256 mb