1:1 FSB:Memory ratio on 865pe fisr (250+Mhz)

Does anyone have memory that is capable of running 250mhz and over? I was interested in knowing whether the bios changes your ratio to 5:4 when you select 250mhz FSB and over like mine does. I don't know why it changes the ratio when the ram is capable of running at 250+ on 2.7V easy. Nothing is holding me back as I have tested all relevant components at required voltages so it is strictly a bios/mobo issue as I see it. Do any of the 5 bioses for the 865pe allow for higher than 250mhz 1:1 ratio? Could it be the brand of memory I have? It is detected as pc3200 memory which is actually a good thing cause it 'tricks' the mobo into thinking it is compatible ram. But even if the ram is not on the list of 'compatible' ram modules, this should not cause such a problem as that. My theory is that this MSI board has set parameters coded into the bios that govern the way the mobo behaves IRRESPECTIVE of the capabilites of the components in the system. If your mem modules, cpu, etc. fall under a certain category defined by MSI, the mobo will change them back to a default or 'safer' setting if you increased it beyond what the deem is acceptable. How do I know this? Well if you use an utility that allows you to change parameters in windows, such as MSI's very own corecenter you will see that the computer will run at a speed that it would not run at if set in the bios (assuming that your components are capable of running at increased speeds). If anyone has done extensive testings and can tell me which of the 5 current bioses are the least restrictive on user settings, can they please let me know?
My sys specs are:
MSI NEO2 865PE FISR
P4 2.4C 800 FSB
2x512MB ADATA PC4000
ATI Radeon 9700
WD 40GB 8MB Cache
IBM Deskstar 120GXP 40GB
Lite-On 16x DVD rom
Enermax 550W PSU
As of now I am in hardcore diagnostic OC mode. I am taking the time to verify the limits of each of my components separately. Only one component is stressed at any one time and the others are all run as below spec as possible. Lets see what turns up. Let me know what bios works best for you guys.

U had any problems with u'r ADATA DDR 500?
Where did u pick it up??
see my other post for my specs
http://www.msi.com.tw/program/e_service/forum/index.php?threadid=27815&boardid=10&styleid=1&sid=f383feb6d3080c2e532cb89a2201c498

Similar Messages

P31 Neo-F - I don't have 1:1 FSB\memory ratio

MSI P31 Neo-F (Bios 1.2) Rev 1.0
Corsair 6400XMS2 2 x 1Gb (Dimm1 & Dimm3)
Core2Duo 4300
Core2Duo 6300
The BIOS sees both sticks of RAM. I have tried slots 2 & 4 in desperation as well.
I can not get 1:1 memory ratio.
With the 4300 I get AUTO\1:1.66\1:2. Set to Auto it runs at 1:1.6
With the 6300 I get AUTO\1:1.25\1:1.5 (if my memory servers me right). Set to Auto it runs at 1:1.25
I have cleared the BIOS many times. What am I doing wrong?

Quote
The Corsair memory is DDR2-800 isn't it?
Quote
Corsair 6400XMS2 2 x 1Gb (Dimm1 & Dimm3)
Yes, and there should be no problem making your RAM operate @800 Mhz by choosing the proper FSB/DRAM ratio in BIOS.
Quote
My MSI P35 Plat runs with the same memory at 1:1 fine with the same processor. So are you saying the P31 can not do the same?
I know, this matter is complicated, but I will try to explain and to give you at least a partial answer. P31 and P35 chipsets do not use the same memory controllers. Have a look at the Intel Datasheets for both memory controllers:
P31 / 82P31 Memory Controller Hub (MCH) --> DATASHEET
Page 21:
Quote
Supports Front Side Bus (FSB) at the following Frequency Ranges: - 800/1066 (200/266MHz)
and Page 25:
Quote
Differential Host clock of 200/266 MHz (HCLKP/HCLKN). Supports transfer rates of
800/1066 MT/s.
Compare to:
P35 / 82P35 Memory Controller Hub (MCH) --> DATASHEET
Page 27:
Quote
Supports Front Side Bus (FSB) at 800/1066/1333 MT/s (200/266/333 MHz)
and Page 31:
Quote
Differential Host clock of 200/266/333 MHz (HCLKP/HCLKN). Supports transfer
rates of 800/1066/1333 MT/s.
As you can see, according to Intel specs, the P31 chipset itseld does not offer native support for CPUs that operate @333 (1333) MHz FSB Clock Speed. That is why, from a chipset point of view, the number and variety of possible dividers is less compared to the P35 chipset. Looking at the differential between FSB and Memory Clock speed you can also see that 1:1.25/1.1.5 (E4300) and 1:1.66/1:2 (E6300) are the native chipset ratios to match DDR2-667 and DDR2-800 RAM with FSB/200 MHz and FSB/266 MHz processors.
Of course, in practice chipset limitations can be exceeded by BIOS programming to a certain degree. That is why P31 boards actually do support FSB/333 MHz CPUs, but the support is not native. Have a look >>here<< as well.
The only situation in which you actually need the 1:1 memory divider is overclocking, but since this a budget board not meant to be put to excessive OC use, BIOS implementation of memory dividers that go beyond Intel specs is limited. After all, it is a matter of price/performance. The MSI P31 Neo-F matches the Intel specs and exceeds them when it comes to FSB/333 MHz processors, there is no real mistake here. I can find nothing in the Intel specs nor in the MSI Product information that says there has to be a 1:1 ratio implemented at all costs.
There is a chance, of course, that MSI will implement more memory dividers in a future BIOS release. Try contacting MSI, maybe they can give you a more definate answer this one:
http://ocss.msi.com.tw/
Quote
The Intel chipset is capable of offering 1:1
Capable: yes, native support: no.
Quote
The issue is MSIs implementation of it = BIOS.
You are most likely right about BIOS implementation in general, but I don't see a reason to call it an issue at this point.

What's FSB Memory ratio? What should i choose? My mobo is in my sig.

It has some choices like 1:1, 1:1.66, or 1:2 etc.? Any help will be appreciated.

Also, AMD's DO not have an FSB.
It's a common mistake, that even BIOS engineers make.
AMD's have a reference clock where everything is devided from.
But it's not a Front-size-Bus, AMD has a Hyper-Transport bus, but the clock for that is a multiple of the reference clock.
However, this HT-clock doesn't have to be the same as the CPU-ref-clock...it can have several different clocks

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.

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.

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.

Fsb/dram ratio on p31 neo

hi,
i have p31 neo board. in bios the only option for fsb/dram ratio is 1.1.66 and 1.2. with this option overclock is almost imposible (fsb <240)
a bios update will resolve problem or i can't do anithing.
thanks
msi p31 neo
pentium dual core 2160
2*1 gb ddr2 pc 6400
wd 3200aaks
gainward 8600gt
corsair vx450
case asus

Actually, the system should start even with DDR2-1066 memory installed, but it should recognize it as DDR2-800. You will not have additional memory dividers when inserting DDR2-1066 RAM. You even be able to increase memory speed beyond DDR2-800 MHz by increasing FSB Clock Speed. However, there is no guarantee that you can successfully make your RAM operate its rated speed.
If you are really planning to overclock your system, you may be better of looking for a board that is more up to this task (P35 Neo2/P35 Platinum would be a much better choice in this case.)

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.

Need help with memory upgrade on Satellite A100-250

Help me with upgrade memory on TOSHIBA Satellite A100-250 up to 1024 mb.
I want to buy another slat of memory ddr2-533 512 mb, what exactly model am I necessary to search, that they worked in a pair.
Sorry for bad english. From Russia with Love.
PS. I like drink russian vodka :)

Hay
Your notebook can be upgraded up to 2 GB and compatible RAM is DDR2-400/533 1GB (PA3411U-1M1G).
Use this part number in Google and you will find it.
Bye and dont drink too much Vodka. ;)

Have a late 2007 MacBook 2.2 Ghz Intel Core 2 Duo, memory upgraded to 4 GB 667 MHz. What do I need to upgrade to run Mountain Lion OS 10.8?

Have a late 2007 MacBook 2.2 Ghz Intel Core 2 Duo, memory upgraded to 4 GB 667 MHz. What do I need to upgrade to run Mountain Lion OS 10.8?

While we all have MacBooks in this forum most of us don’t run Lion. There's a Lion Support Community where everybody has Lion. You should also post this question there to increase your chances of getting an answer. https://discussions.apple.com/community/mac_os/mac_os_x_v10.7_lion

This is what i have:eMac Machine Model:     PowerMac6,4   CPU Type:     PowerPC G4 (1.5)   Number Of CPUs:1   CPU Speed:     1.42 GHz   L2 Cache (per CPU):     512 KB   Memory:512 MB   Bus Speed:     167 MHz   Boot ROM Version:     4.9.2f1? can i update

this is what I have
eMac
Machine Model:          PowerMac6,4
CPU Type:          PowerPC G4 (1.5)
Number Of CPUs:          1
CPU Speed:          1.42 GHz
L2 Cache (per CPU):          512 KB
Memory:          512 MB
Bus Speed:          167 MHz
Boot ROM Version:          4.9.2f1
can i update to snow leopard?? and how? im having a hard time its my first mac.   I need to to create documents, Im trying to avoid buying a new computer.

You cannot upgrade to snow leopard. Snow leopard was the first of os x to drop support for the motorola ppc processors. The latest you could possibly run would be leopard.
Hope it helps,
Ryan

FSB:RAM ratio on MSI KM4AM-V...CHANGE???

Hello.
I was wondering if anyone knows how to change the FBS:RAM ratio on this board.
It is currently 1:1 but i would like to change it to 10:9 if possible or anything close to that...
Thanks for any help.
roddy

You're probably right, but what could we do without these kind of problems? I mean, if everything would be fine and the computers work out all the time, what could we do? I think that our life without these little problems would be a messy for us! Boring it's the perfect word to express the way our lives would be.
So you could try changing the jumpers on the board overclocking the FSB of the processor because on the SETUP you cant see anything ralated to change FSB or memory frequences, so just do it, but by your own risk
Bye, and thanks for remebering me the meaning of life.

Using 3 Memory modules on 865PE Neo2-V

Hi ! I wonder if it´s possible to install three 512MB DDR 400 sticks on a 865PE Neo2-V motherboard (As it has only 3 slots) Will it work as DDR, even if one channel has 1GB and the other 512MB ???
BTW, I´ve always used two 512 MB sticks on one channel (same color slots) Should I see any performance increase if I switch one stick to the other channel ? (one green and one purple)
Thanks for your help !!!

Quote from: Maesus on 23-February-06, 06:28:03
If you want dual channel performance, make sure you plug the DIMM at slot 1 and slot 3; or slot 2 and slot 4. If you have 3 DIMMs and plug them all, you will not have dual-channel performance but you have 512MB more RAM, which will definitely help to reduce the amount of transfer of virtual memory in your HDD and thus improve the overall performance.
So I understand that 1,5 GB of RAM on Single Channel will perform better than 1 GB on Dual Channel ?

Neo2 Platnum - memory ratio issues, please help!

hey all
very strang stuff...
just got a 3200+ winchester .90 CPU, its nice. also have 2x twinx corsair 3200 non LL ram.
idea: I had in mind that since my ram doesnt OC very well (220 max) I was going to get the neo2 and play with the FSB and set the ratio of the ram to 166 or something so that I could up the FSB which would in turn up the ram to around 200 or a bit over. thats the idea anyways...
result: initially I could not even post with this ram, had to flash to 1.3 but now it works. when I try to set the ram to 166 and start upping the fsb, I can get to around 220 fine. any more than 225 and I cant post... huh??? the ram is only running at 183 or so mhz at this point so I know its not that. I raised the voltage of both the cpu and ram to 10% and 2.80v and still had same problem...
ok, so I thought I would just change the fsb to 133... well again around 225 or so I cant post... ram is running at 150 only then, so definately not ram. I am lowering the HT to 4x and 3x and still no difference..
my last resort was 100mhz.... well oddly enough, when I set the ram to 100 I can up the FSB to 270 and it posts! I can boot windows at 260 fine, cpu is 2600 and ram is 133 at that point... well the ram doesnt bench too good there obviously, like 3100 in sandra.
the only other thing I could thing of was upping the FSB as high as I could go to get the ram up there and lower the cpu multi while leaving the ram at 100... I was able to get it up to 300 which the ram runs at 150 and booted into windows. but zcup said that HT was running at 300mhz... when I tried to up it from 3x to 4x it posted all weird, so I dont really want to stay at that level...
anyone else had issues changing the ratio?? I tried 1.37 with the same result.
facts: in 1:1 I can run up to 220 and boot windows, so ram runs fine at 220
: the CPU runs fine at 2.6ghz so the cpu is ok
the only conclusion I can come to is that the motherboard is wacked out.. I think the bios is crummy or something. I cant afford new ram; I only wish I could change the multi on the CPU!! waaaaaa
any thought are appreciated

Try reposting in the Overclocking forum, and include your complete system specs in your signature.

Neo2 Memory ratio issues, please read

hey all
very strang stuff...
just got a 3200+ winchester .90 CPU, its nice. also have 2x twinx corsair 3200 non LL ram.
idea: I had in mind that since my ram doesnt OC very well (220 max) I was going to get the neo2 and play with the FSB and set the ratio of the ram to 166 or something so that I could up the FSB which would in turn up the ram to around 200 or a bit over. thats the idea anyways...
result: initially I could not even post with this ram, had to flash to 1.3 but now it works. when I try to set the ram to 166 and start upping the fsb, I can get to around 220 fine. any more than 225 and I cant post... huh??? the ram is only running at 183 or so mhz at this point so I know its not that. I raised the voltage of both the cpu and ram to 10% and 2.80v and still had same problem...
ok, so I thought I would just change the fsb to 133... well again around 225 or so I cant post... ram is running at 150 only then, so definately not ram. I am lowering the HT to 4x and 3x and still no difference..
my last resort was 100mhz.... well oddly enough, when I set the ram to 100 I can up the FSB to 270 and it posts! I can boot windows at 260 fine, cpu is 2600 and ram is 133 at that point... well the ram doesnt bench too good there obviously, like 3100 in sandra.
the only other thing I could thing of was upping the FSB as high as I could go to get the ram up there and lower the cpu multi while leaving the ram at 100... I was able to get it up to 300 which the ram runs at 150 and booted into windows. but zcup said that HT was running at 300mhz... when I tried to up it from 3x to 4x it posted all weird, so I dont really want to stay at that level...
anyone else had issues changing the ratio?? I tried 1.37 with the same result.
facts: in 1:1 I can run up to 220 and boot windows, so ram runs fine at 220
: the CPU runs fine at 2.6ghz so the cpu is ok
the only conclusion I can come to is that the motherboard is wacked out.. I think the bios is crummy or something. I cant afford new ram; I just want to be able to change the ratio to 166 and have it work, is this too much to ask?
Should I RMA the board?

I use an Antec TruPower and that is hindering my performance right now.
If its your ram that is failing use memtest to see at what speed it's failing. I started at (1:1) at 2.0 Ghz dropped the multi to 9 and slowly raised the fsb until memtest would give me errors. After finding a setting that was error free i then ran prime95 to see if it was really stable. I haven't been able to run 1:1 but i do hit 2.5Ghz without any memtest or prime95 errors.
"the only other thing I could thing of was upping the FSB as high as I could go to get the ram up there and lower the cpu multi while leaving the ram at 100... I was able to get it up to 300 which the ram runs at 150 and booted into windows. but zcup said that HT was running at 300mhz... when I tried to up it from 3x to 4x it posted all weird, so I dont really want to stay at that level..."
You were running HT at 300 and tried to go from x3 to x4? I don't remember the exact number but you can't go over 1020-1040 on HT.
Edit: finally... (1:1), now just gotta test for hours on prime95...ugh.

1:1 FSB:Memory ratio on 865pe fisr (250+Mhz)

Similar Messages

Maybe you are looking for