1:1 FSB:DDR clocks

i was just wondering if there was a noticeable performance difference with 1:1 ratio? i am currently running a P7N Diamond with a QX9650 @ 333x12 and 4x2GB G.Skill DDR2 1000(500x2) with a 2:3 ratio, and wondering if i should bother trying to get a 1:1 ratio. system seems stable but i am always looking for more speed

ok, i see where a 1:1 ratio would be good in keepin a low latancy for benchmarks. but in real world application faster speed is the best route my 2:3 rayion is un noticable,, means i xhoud be just fine with my stability. thanks for your help guys check my system out here http://valid.x86-secret.com/show_oc.php?id=329680 i have had some good stability afer getting the G.Skill ddr2 1000ram and 1.1b1 bios. all i did was up the multiplyer and cpu volts. keep in mind i dont qit get 24/7 uptime like i used too with my laptop. somrtime my internet explorer gets all f'ed up and requirers a system restart. but my bit torrent client is just fine through this whole mess so i dont know what is the major deal here.
but thanks for your input...

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FSB:DDR ratio?

I don't really understand the FSB:DDR ratio? I have a MS-6758 LSR with a P4 2.6HT . I have 1 gb of Crucial TEch DDR Ram. I downclocked my FSB back to normal because of an instable system in windows ( freeze all the time).
Can you help me finding the best settings ( FSB, DDR CLocks, AGP VOLTAGE ect..)
Thanks very much !!!!

You don't really 'lock' it to 400. You set it to 400 which puts it in 1:1 synch with the FSB at 200. I think what you want to do is set the DRAM clock at 333, so as it steps up with the FSB it won't reach 400 until your CPU is at a higher speed.
If you get this working, please report your current benchmark and your new benchmark when not running 1:1. I'm cursios to see the net effect of increasing your CPU speed while sacrificing memory speed.

Setting FSB:DDR ratio?

How does one go about setting the FSB:DDR ratio on the Neo-2 (865)?
I'm trying to overclock my P4 2.4C (with HyperX PC3500 RAM), but I'm not able to get any higher than about 2.7 GHz because the DDR frequency gets too high, even if I lock it at 400 MHz in the BIOS.
Is there a setting I'm missing? Does the board automatically set the ratio if the system bus is set high enough?
Help would be appreciated, thanks.

You don't really 'lock' it to 400. You set it to 400 which puts it in 1:1 synch with the FSB at 200. I think what you want to do is set the DRAM clock at 333, so as it steps up with the FSB it won't reach 400 until your CPU is at a higher speed.
If you get this working, please report your current benchmark and your new benchmark when not running 1:1. I'm cursios to see the net effect of increasing your CPU speed while sacrificing memory speed.

Current DDR Clock

Greetings - My Fellow MSI users!!
This is my first post and I'd like to welcome myself... Thank you, thank you!!
I must start off with saying that I've built a number of rigs before, but to date I'm having the most fun with this one (see specs in sig). This forum has provided me with a wealth of info and for that I thank you all for your input - VERY HELPFUL!
OK, now that's off my chest - here's my question -
Under the Cell Menu -
Where it lists Current CPU Clock and Current DDR Clock -
My Current DDR Clock lists 200 - Is this correct when I'm running Kingston KHX3200AK2/512 (2x256). I've up the voltages for the ram to 2.60v (as kingston indicated)... I cannot get the timing correct however... everytime I try to adjust, NO boot! This is true whether the the RAM is in slots 1&2 or 1&3. Is this a setting that can be/should be changed somewhere?
It seems pretty stable overall, but I keep thinking this thing should by flying right now!
Thanks
The specs incase the sig does not show up...
MSI K8N NEO2 Plat -
Athlon 64 3500+
Rosewill FX5200 256MB
Aspire 500W PSU
Seagate 80GB Sata
Kingston KHX3200AK2/512 (2x256

Currently the settings are all on "Auto"
Kingston recommends 2-3-2-6-1
However when I try to enter those timings, by the time I get to the last entry "Row Precharge" there is no entry for #1 (only 2-6) and the one prior is "Min Ras#) is 5-15.
I've realized I need a better understanding of the timing settings because it seems really blurry right now.
I'll would like to give the your suggested timings a try, but clarify that 8 (in your 3-3-3-8) would be the selection for "Row Precharge" or "Min Ras#".... I'm thinking the latter of the 2 mentioned because "Row Precharge" only offers 2-6.
Thanks in advance!

MOVED: MSI P31 Neo and FSB/DDR ratio

This topic has been moved to Overclockers & Modding Corner.
https://forum-en.msi.com/index.php?topic=116635.0

Hello Aacko,
the P31 Neo is a budget board that is not really designed for overclocking (notice the red PCB). The P31 chipset supports DDR2-667 and DDR2-800 memory modules. With a FSB-200-MHZ-CPU installed, 1:1.66 and 1:2 are exactly the ratios you need to get your RAM to 667 MHz or 800 MHz.
Quote
Can I do something about this or should I swap P31 Neo to some P35-chipset mobo that would allow more flexible FSB/DDR ratio settings?
If you really want to overclock, you should go for a P35 Platinum or P35 Neo2-FR/FIR board.

MSI P31 Neo and FSB/DDR ratio

I purchased P31 Neo -mb and E2160 processor.
I've red that this processor could easily hit 3.0 Ghz with 333 mhz fsb. The problem is that I can't find a setting from P31 Neo's bios that would allow to unlock FSB/DDR ratio. There is only Auto, 1:1.66 and 1:2 setting for FSB/DDR ratio. When I raise the FSB the DDR speed quickly raises over 800 Mhz and the system doesn't post. 2160 Mhz is the top that i've managed to overclock E2160 because my DDR2-chips can't handle the higher FSB speeds.
Can I do something about this or should I swap P31 Neo to some P35-chipset mobo that would allow more flexible FSB/DDR ratio settings?

Hello Aacko,
the P31 Neo is a budget board that is not really designed for overclocking (notice the red PCB). The P31 chipset supports DDR2-667 and DDR2-800 memory modules. With a FSB-200-MHZ-CPU installed, 1:1.66 and 1:2 are exactly the ratios you need to get your RAM to 667 MHz or 800 MHz.
Quote
Can I do something about this or should I swap P31 Neo to some P35-chipset mobo that would allow more flexible FSB/DDR ratio settings?
If you really want to overclock, you should go for a P35 Platinum or P35 Neo2-FR/FIR board.

MSI K7N2-V incorrect FSB/CPU clock

I just flashed a K7N2-V with latest bios (6729v54). The system includes 512 mb 333mhz Memory and an Athlon XP 2100+ (266 mhz). After flashing the bios I reset the bios to the previous settings (FSB to 166 and the CPU to 133). The only problem is the system now identifies the CPU as an Athlon 1500 running at 1300 Mhz. After booting, WCUPID shows the cpu running a system clock of 100 (as opposed to 133) with a multiplier of 13 (hence the 1300 mhz (13 x 100) and the FSB as 200 Mhz rather than the correct 166. Prior to the flash this system ran normally.
I have reset this numerous times and tried multiple settings, including manual, auto , high performance but the system always shows the same 1300 mhz. I reflashed to a previous version (6729V52) hoping to turn it back but the results are the same. Regardless of what settings I put in the FSB and CPU it always reverts to the 100 mhz clock speed and 200 FSB. The bios ALWAYS indicates a 1300 Mhz speed even if I up the CPU clock to 166 or 200. In essence the system is stuck at 100 mhz system clock and 200 FSB and it does'nt care what I set in the bios.
What in the heck is causing this? and how can I fix it?
Any ideas are appreciated.
beullar

I am having the same exact issue (not "Exact" same board, but same series.)
I have the MSI K7N2GM-L (MS-6570)
I have installed in the board a AMD Athlon XP 1900+ (12x133 @ 1.75 Volt)
However, when I turn the PC on, it is set to 1200MHz when it should be 1600MHz
I have tried resetting the BIOS, even bought a new battery (though no settings are being lost, I figured it was worth a shot..)
I have tried to let it auto config it, ect.., tried manual of course, FSB is set to 133, I have double checked, I am using 3x 512MB PC-2100 DDR sticks, they are 266MHz (have not upgraded to 400Mhz Dimms yet)
The DDR is fine, I installed it into a MSI K7T266 Pro2-A Motherboard and did not get the same issue, along with the CPU ect.. however, I use a nVidia GeForce FX 5900 AGPx8 video card which the KT7 board only supports 4x speed where as the one I have issues with supports 8x.
Now funny part is, if I shut off the computer, wait some time, turn it on, "sometimes" not always but sometimes, it will decide to kick into 1600MHz and shows the CPU name properly. When it does boot and shows 1200MHz it does not show the CPU Name.
So basically, if I have to shutdown for something such as installing a drive, removing a drive, ect.. I have to play with it by turning off and waiting, then turn on until it decides to boot using 1600MHz instead of 1200MHz
I have tried Flashing the BIOS using Live Update via DOS mode. Right now I am on the machine and it is running @ 1600MHz. But the minute I shut off the PC completly, and turn it on, it will be at 1200MHz and I have to go through the process of turning it off and on until it posts 1600MHz again..
And I had checked to make sure it was not typo on the BIOS part by letting it boot to Windows and sure enough it would show it was a 1200MHz when it does this.
I am thinking the BIOS has some bug, the board runs fine however, no lockups, performs well, ect, apart from the BIOS not wanting to cooperate with my 1900+ 100% of the time, it seems to run fine.
Any suggestions, please lemme know :S

MSI G41M-P23 FSB/core clock issue (HELP!)

Alright, so a few days ago I bought an MSI G41M-P23 with 8 gb of DDR3 1066 (PC3 8500) RAM (the standard for this board). My CPU is an E8400 (3.0 ghz). At first I wanted to maybe fiddle with some overclocking, which is where I realized that this mobo fails at. Not a big deal...but every time I attempted to up the FSB above 336 or so (this CPU's default is 333... x 9 = 3000 mhz), the system would not POST, instead it simply would loop on/off until eventually going back to defaults.
That was fine with me -- I don't need to overclock, really. However, I noticed something odd in the BIOS. The CPU speed, which according to the fsb multiplier was the correct speed (2997 mhz), was very not correct in the CPU info section of the BIOS. There, it listed the speed at 1.8 ghz. Thus I decided, for the heck of it, to take at look at CPU-Z at this time.
This is what CPU-Z is currently telling me (I have a screenshot, but I can't seem to post it here):
In the "Clocks" section (bottom left of the main tab in CPU-Z)
Core speed: ~1894 mhz
Multiplier: x 9.0
Bus Speed: ~210 mhz
Rated FSB: ~842 mhz
The RAM speeds and ratios are correct, though, given the FSB:RAM ratio (it would seem). Ram clocks in at ~333 mhz, which with a 5:8 ratio should put it at 1066...I think.
So now CPU-Z and part(?) of the BIOS is showing me the wrong CPU speed (1800 mhz). It's also listing my FSB at 200 mhz despite the fact that my I set it in my BIOS at 333 mhz. The 200 Mhz adds up with the incorrect core speed, as 200 X 9 = 1800. If I go back to the BIOS, it lists the FSB correctly, and the POST screen displays the correct FSB and multiplier, but again, the CPU info screen of the bios is reading 1800 mhz, while listing the FSB as 333. I don't have any speedstep/CE1/other modifiers turned on, and this reading is currently under normal load (read: not idle). I'm at my wit's end here.
Is this board not saving my FSB speeds in the BIOS? Is there any way to fix this issue? I apparently have the most up-to-date BIOS according to CPU-Z and MSI's support website. I have not tried every setting of the OC switch yet, though I have tried a few (200 -> 333, for example) and all have resulted in a system that will not POST, and leaves me having to reset the CMOS jumper in order to get it to boot again (as opposed to the looping/defaulting cycle mentioned earlier).
Can someone PLEASE help me? I just reinstalled Windows 7 x64/all my programs because of this new board...and I really, really don't want to do that all again.

Well, I heard back from MSI. They are just as confused over the BIOS version as I am, apparently. V30.8 is not what is supposed to be on the board. So, rather than flash it and hope that it works, etc., I decided to simply return the board, as I've only had it for a few days, and bared used it. Something is clearly wrong with it to have an "unknown" BIOS installed.
I went ahead and ordered a new CPU and mobo entirely...Core i5, too. No MSI board this time...only because they didn't have a board in my price range. I wanted this upgrade to be something easy and simple so I wouldn't have to do that.. oh well.
I do find it very strange what's happened with this board, though....I've never before heard of ordering and receiving a board with an unknown BIOS on it...even according to the manufacturer. Maybe an out-of-date BIOS, but not something completely off the radar. Still, thank you again for your help.

Setting BIOS CPU FSB clock to 333

Hello everyone,
I recently acquired the K7N2-Delta ILSR (MS-6570) motherboard; nVIDIA Next GF2 400 FSB DDR. The CPU is an Athlon XP 2500 1.85 GHZ, 333 MHz.
The mainboard specs states the Socket A (Socket - 462) supports AMD Athlon XP processors @ FSB 266/333/400. I have the jumper J11 on the board set to 'short'.
With all that said, I've tried adjusting the CPU FSB Clock Frequency to 333 in the BIOS Setup Utility yet 200 is the highest option it gives. Does the CPU Interface have to be set to 'High Performance'? Other adjustments necessary?
Thanks for any feedback!

200 mhz fsb is the correct setting, DDR is just that "double data rate" so 200 x 2 = 400 mhz
MikeB

Is it possible to use DDR 266 on a AMD XP 2600+ with a FSB 333?

I was wondering, is it possible to use a DDR 266 RAMS on a AMD XP 2600 with a
FSB 333MHZ? So far I am using it and I didn't have any problems with it...
I was thinking it may burn out the RAMS! Will someone please give me some pointers on this!

only problem is you are better running ram 1.1 with fsb,wether rams slower or faster,any other setting gives very bad results
lower fsb to 133 and set ratio fsb ddr 1.1 and bench it ,then raise it a bit at a time as far as you can
if it will not boot use j10 after shutting it down to get it back

Ballistix pc4000 ddr 500 running @ ddr 214 - help please?

k8n neo2 plat bios ver 1.3
3200 winchester
2x512 ballistix pc 4000 ddr sdram in slots 1+3
Hi
Im hoping someone will be able to help. I cannot get this memory to run at anything more than a ddr clock of 107 (214 ddr) when i set the timing to 'auto' on the memlock. Cpu-z says this speed but also has '256 clocks' in the 'dram idle timer' in its memory tab (meant to be 16 clocks im sure).
Ive messed around with it for ages trying to get it to work and have just received various error sounds and messages causing me to have to reset the cmos numerous times just to be able to get back in.
I can get it to work if i lock the memlock at 200 but this is causing it to run at only pc3200 (ddr 400) speed, not to mention giving me the inability to overclock it at all. Timings are set at what the memory is meant to run ddr 500 at - 2.5-4-8-4 (but im only sticking 2.7 volts through it, from stated 2.8, as it's running slower).
The crucial tool said it would work fine, the spec of the memory and board indicate that they're compatible with each other, and several people in the thread on this site are using it (1 person @ 235 fsb) - so i seem to think that i may be missing something.
Also, each stick of the memory works fine on it's own, got it to ddr 440 without flinching (220 fsb... ), and stable, no crashes or nothing - hours of use and numerous benchmarking. But 2 sticks just sends the ddr clock back to 107 unless i lock the memlock.
I've run memtest whilst locking the memlock at 200 and it showed no errors. Im going to do the same thing overnight tonight with the ddr clock knackered at 107 - see what shows up.
My other memory works fine - 2x512 2700 kingstonX.
Can anyone help? Much thanks

Try a BIOS upgrade.
Maybe it's no coincidence that my OCZ 3500EB was also limited to 214 mhz on my K8N Neo (not Neo2) with BIOS 1.4. Both sets of RAM use ICs made by Micron so perhaps it's no coincidence (not to say they're exactly the same. They're not.)
Upping to beta BIOS 1.52, 1.55, or 1.56 fixes things for me.
Maybe for the Neo2 you should try beta 1.36 or 1.37 then? Worth a try. I believe that K8N Neo BIOS 1.4 and K8N Neo2 BIOS 1.3 are total clunkers.
Good luck...

Can't change FSB or anything

I have been trying to oc my 2200 to get the most out of it that I can. I tried the wire trick a while back but I ended up bending a pin which I fixed. After that I never oc'ed my cpu. I tried the other day just to raise my FSB but had no luck.
For some reason when I raise the FSB nothing happens to the cpu. I had the FSB at 290 but the cpu was still 1800mhz in bios, core center, and windows. Im pretty sure you can raise the FSB without unlocking the cpu. I thought I had before. Now I cant for some reason, and I dont know why.
What am I doing wrong? How come the FSB wont go up and change my cpu clock? Any suggestions?
Thanks.

Hi, thanks for the tip. I changed the fsb/ddr ration to 1:1 as you suggested and upped the fsb to 140 last night (multiplier set at 7 in the bios) with Vcore left at standard. WCPUID showed a clock speed of 2100 with a multiplier of 15. The cpu temp is now around 48c, and system seems to be stable.
I will try upping it a bit more tonight, but a jump of 300 Mhz over the standard clock speed seems pretty good to me.
The only thing that is bugging me is that I can't up the multiplier from 7 in the bios, even if I go at 7.5 with a fsb of 133 the system won't boot, even when I up the Vcore to 1.8v. Also 7 is the lowest I can go (I get options from 7 to 13.5). If you know why this might be (do I need to unlock the cpu?) or have any other tips for oc'ing this system I'd be grateful.
tbed 2200
WD Caviar 40 Gb
k7n2-Delta L
radeon 9800 pro
Thermaltalke Purepower 350w
2x256 Corsair 2700
1x256 Crucial 2700

Some question and problems on FSB:Dram

Hi to all, i have a simple question fo you (i hope that's simple :D )
I have a p4 3.2 GHz like you can see here:
FSB is 200Mhz and it's ok
But i have 4 pc3200 ram modules in dual channel mode, i think that their frequency must be 200Mhz but it's only 160, and i can't activate pat, like yuo can see here:
Now my question is: Why?
Thank to all

Quote
Originally posted by NovJoe
Simple, as displayed in the second picture, you've set your DRAM Frequency to DDR 333MHz which will be detected as 320MHz for FSb 800MHz CPU on DDR 400MHz RAMs. Due to this, CPU-Z will think that you are running in 5:4 ratio instead of 1:1 ratio. To obtain 1:1 ratio, you must set your DRAM Frequency to 400MHz in BIOS and make sure that DDR Clock is reading it at 400MHz also before saving to CMOS. Check with CPU-Z again and you'll see that it'll display 200MHz(RAMs are double rated where you've to multiply the rates by 2) and ratio at 1:1.
Isn't so easy...
My actual configuration:
Dynamic Overclocking: Private
Performance Mode: Slow (If i put fast or greater... KABOOM :D)
CPU Ratio: Locked
DRAM Frequency: 400Mhz
Spread Spectrum: Disabled
Adjust CPU Bus Clock(Mhz): 200
DDR Clock: 333 (Adjust AGP/PCI Clock (Mhz): 66.66/33.33
CPU Vcore Adjust: NO
CPU Vcore: 1.5500V
DDR Power Voltage: 2.65V
AGP Power Voltage: 1.55V
I can't understend why DDR Clock is 333 :(

RAM/FSB/RATIO

hello oc'lers
just a simple question i often read that most people set their ram ration to 4:5 meaning using 333instead400ddr etc.
So my question you slow down your ram to get more cpu speed???
I dont understand that if you slow down one componed how can the whole system be faster??

Excellent treatise on FSB and DDR clocks!
Quote
Will the NVidia GPU work faster if I have a faster CPU?
Sorry, but I meant to imply the answer. The long of it is despite offloading most graphic operations to the GPU, a significnt part of display drivers are still executed by the CPU, so YES - by increasing FSB, graphic operations should also run faster :D
Having said that, please note that you won't be able to have a 10% increase in FSB result in a corresponding 10% in application performance OR benchmark results because of inter-dependencies.
Check out this review on a comparison of the same video card on 2 systems with diff proc speed (and architecture)
VGA Charts, Part II: Mainstream Systems

? about FSB and HT

I am new to overclocking and setting up the BIOS
I download PCmark2002 and it states I have a 200 FSB when I thought it was suppose to be 800. When I go into the corecenter it also states 200 but I am able to change it.
I am wondering what should the FSB read in the corecenter and should I change it. Right now its reading 200. And if I should change it, should it be done in the core center or in the BIOS and how.
I was also wondering about Hypertreading Tech. and how do I know its inabled. I remeber reading on Tom's hardware about enabling HT.
Any help would be greatly appriciated.
Any tips on how to overclock it and to what degree would be a great help

Do a search on Core Center on the Overclockers and Modding forum and you'll find a concensus of opinion.
Some people use it. I don't like it. Most other people don't like it. I'd advise not using it and using BIOS.
Your FSB is quad-pumped (4x) to get your CPU frequency base frequency, hence the FSB 200 for a 800 MHz base frequency. Your memory is DDR (dual data rate - 2x) so for 200 FSB you get a memory frequency of 400 MHz.
Things to try:-
In BIOS
Frequency/Voltage Control
Dynamic Overclocking: Disabled
Performance Mode: Slow
CPU Ratio Selection: Locked
DRAM Frequency: Auto
Spread Spectrum: Disabled
Adjust CPU Bus Clock (Mhz): 200
DDR Clock(Mhz): 333 (Greyed out)
Adjust AGP/PCI Clock(Mhz): 66.66/33.33
CPU Vcore Adjust: No
CPU Vcore: 1.5250V (Greyed Out)
DDR Power Voltage: 2.70V
AGP Power Voltage: 1.55V
If you had to change Performance Mode to Slow, you will have to Save and Exit and then re-enter BIOS for all the following options to be available. If it was already Slow move straight to
Advanced Chipset Features
DRAM Timing Setting
Configure DRAM Timing by SPD: Disabled
CAS Latency: 3 Clocks
RAS Precharge: 4 Clocks
RAS to CAS Delay: 8 Clocks
Burst Length: 4 Clocks
Integrity Mode: Disabled
With these settings we can start to overclock your system. SLOWLY increase the FSB (CPU Bus Clock) in increments of 5. Save and Exit. Test memory with MemTest. Boot into Windows and stress test (prime95). Once you start to get errors, back off 2 or 3 MHz.
ALL OVERCLOCKING CARRIES A RISK OF COMPONENT DAMAGE OR FAILURE!!!
IF YOU CAN'T AFFORD TO LOSE IT, DON'T DO IT.
Your memory is likely to be the holding factor here, as it is only rated to 400 MHz!!!
If you do decide to try it, let us know how far you get, we can advise on further optimisation.
Hope this helps a little. Good Luck.

1:1 FSB:DDR clocks

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