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System memory FSB

I have been using intel 915glvg motherboard since 2005.It have 4 slot for memory. It supports for 400mhz FSB for RAM. I was using 512MB ,400 Fsb Hynix RAM.Recently I upgraded it to 1GB RAM .For this i installed a new 512MB RAM(400FSB) (which is not hynix brand) in another slot.But now my system shows that system memory speed is 333 FSB. When I remove any one out of them then system show 400 FSB.Why it is happening. The sencod RAM that I have used is not of Hynix brand.My old Hynix 512 Ram consists 8 ICs on it while new RAM which i have installed consist 16 ICs(8 on each side) on it.

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  • ankl Jan 04, 2008



    thanks,

    Yes i have tried them in different slots but problem exist.

    How can I change the command rate from 1T to 2T? I dont know about 1T or 2T

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Have you tried installin the memory in various slow...ie 1,2/1,2/1,4 etc?
Its sounds like your mother board is unable to run the sticks at the rated speed as they are different brands and densities so its dropping the speed to 166.

Have you tried going into the bios and changing the ram speed there?
Also try changing the command rate from 1T to 2T to see if that helps.

Posted on Dec 29, 2007

  • Graeme Fallows Jan 04, 2008

    Its a setting that you should find in the bios. Will be in memory adjusting part and called either "command rate" or just "cr" or "cpc"

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System reguirements to inrease ram memory


Ram Memory typically operates at half of the frequency rate, ('Speed'), that the Processor's -> FSB does.

Your motherboard supports Processors that have either a 400MegaHertz Front Side Bus, (400MHz FSB), or 533MHz FSB, or 800MHz FSB.

(Northwood Core for 400MHz FSB. The rest is in the other solution I provided)

Processor has a 400MHz FSB?
You can use DDR Sdram ram memory that is 266MHz.
(PC2100)

Processor has a 533MHz FSB?
You can use DDR Sdram ram memory that is either 266MHz, Or 333MHz.
(PC2100 and PC2700 respectively)

Processor has an 800MHz FSB?
You can use DDR Sdram that is either 266MHz, or 333Mhz, or 400Mhz.
(PC2100, PC2700, and PC3200, respectively)

NOTE*
When using a processor that has an 800MHz FSB, and using PC2700, (DDR at 333MHz), the PC2700 ram memory will run at ->
320MHz.

JEDEC has set the voltage requirements for DDR Sdram at 2.5 Volts.
'Performance' ram memory that is DDR Sdram may use higher voltages.
Not recommended unless you know how to overclock.

Although the motherboard, and the ram memory module may have SPD, it doesn't always work,

http://en.wikipedia.org/wiki/Serial_presence_detect

A lot of times you are faced with going into BIOS Setup, and changing the ram memory voltage, IF BIOS Setup has this feature.
This is why I say overclocking experience helps tremendously.

You want Low Density, Unbuffered, Non-ECC, and a CL of 2.5 for PC2700, and a CL of 3.0, (3) for PC3200.

[Why would anyone want to run PC2100> Lol! ]

For additional questions please post in a Comment.

Regards,
joecoolvette

Nov 11, 2012 | Computers & Internet

1 Answer

Problems with new ram


This = NO

The Foxconn P4M800P7MB-RS2H motherboard supports ram memory that is either 400MegaHertz, or 533MHz.

You have installed 667MHz ram memory.

http://www.play.com/PC/PCs/4-/3274794/-/Product.html

You also need to watch the Front Side Bus (FSB) of the processor you are using.

Ram memory typically operates at HALF of the FSB of the Processor.

Processor FSB support is 800MHz maximum.
Half of that is 400MHz.
You CAN use 533MHz ram memory, however.

(This is DDR2 Sdram ram memory.
PC2-3200 is DDR2 at 400MHz.
PC2-4200 is DDR2 at 533MHz. (Also known as PC2-4300. Depends on the ram memory manufacturer.

PC2-3200 actually operates at 200MHz. { Max} It is 'Dual Pumped'
PC2-4200 actually operates at 266MHz )

What to do?
Hopefully you saved the carton/s the ram memory came in.
Ship them back, get the ram memory you need.

ALSO;

What is the FSB of the Processor you have installed?
Don't know?
Post back in a Comment as to the model name, and model number.

(Example; Intel Pentium D model 805,

http://en.wikipedia.org/wiki/List_of_Intel_Pentium_D_microprocessors#.22Smithfield.22_.2890_nm.29

FSB support is 533MHz
No, you cannot use 533MHz ram memory. { PC2-4200 }
PC2-3200 is the max.

Pentium D model 820 for example, you can )

Nov 18, 2011 | E-Machines Computers & Internet

1 Answer

Dell dimention 2350 socket 478 I upgrade celeron 2.0Ghz to pentium 4 3.0Ghz 530 The Bios show me the speed 1.5Ghz. Bios A02


The Dell Dimension 2350 Desktop PC motherboard, has an Intel 845GL motherboard chipset,
mounted to it. (System Information),

http://support.dell.com/support/edocs/systems/dim2350/specs.htm#1101572

Here we see that the Intel 845GL chipset supports processors, with a -> maximum <- Front Side Bus of 400MegaHertz, (FSB = 400MHz max.),

http://en.wikipedia.org/wiki/List_of_intel_chipsets#Pentium_4_chipsets

The Intel Pentium 4 model 530 (3.0GHz. Also has Hyper-threading Technology. HT), operates with a FSB of 800MegaHertz, (FSB = 800MHz),

http://en.wikipedia.org/wiki/List_of_Intel_Pentium_4_microprocessors#Prescott_.2890.C2.A0nm.29_2

(Scroll down. Pentium 4 HT 530 )

You can't make the Intel 845GL chipset support a processor with an 800MHz FSB.
BIOS update or not, the voltage range will be too low. Therefore the FSB is low. Changing just the Multiplier will not do the trick either.

(BIOS Setup, Advanced Chipset Setup. Doubt the options of changing the FSB, and/or Voltage, and/or Multiplier, is available with that BIOS program))

Note your 3.0GHz processor is operating at 1.5GHz?

Max FSB supported is 400MHz, and your Model 530 needs 800MHz? (For max operation)

Post additional questions in a Comment.

Regards,
joecoolvette


[ Chip and Chipset are shortened terms for I.C.
Integrated Circuit,

http://en.wikipedia.org/wiki/Integrated_circuit

The motherboard chipset technology used for your computer, has a Northbridge chip, and a Southbridge chip.

(Does not apply to motherboards that support the Intel Core i3, Core i5, Core i7, and Core i9 processors )

The Northbridge chip handles the faster capabilities of a computer.
Processor, Ram Memory, and High-speed graphics.

[ The AGP technology, and the PCI-Express technology, is High-speed graphics.
Using a graphics card in a PCI slot, or using Integrated Graphics, is NOT High-speed graphics ]

The Southbridge chip handles the slower capabilities of a computer.
Anything connected to the PCI bus, (Such as a PCI graphics card)
IDE (PATA)
SATA
USB
Ethernet
Audio (Sound)

http://en.wikipedia.org/wiki/File:Motherboard_diagram.svg

[ CPU stands for Central Processing Unit. Another term used is Microprocessor, or Processor for short ]

So it is first up to the Northbridge chip, of the motherboard chipset, whether it will support a certain processor, THEN if a BIOS update will help.

Nov 12, 2011 | Dell Dimension 2350 PC Desktop

2 Answers

I have a 512 DDR2 (533 FSB) RAM in one of my slot in Intel D102GGC2 Mother board,can i put a 2 GB DDR2 ram in another slot.If yes then What FSB will match and what is the maximum capacity of ram per slot?


This motherboard will support maximum 2 GB of total system memory. so configuration is should be 1GB + 1GB or one 2GB in one slot. If you attempt to install 2GB + 512MB, this is unsupported. but you can try if might the system can read it or not. there is no serious problem for installing memory exceed than maximum system memory...
Memory supported is DDR2 533 Mhz and DDR2 400 MHz...(sometimes on the market DDR2 533 will described as module name PC2-4200 and DDR2 400 as PC2 3200)

Aug 10, 2011 | Intel D102GGC2 Motherboard

2 Answers

Will pc2-5300 memory work in emachines t5082?


Yes it will work

Memory Type: DDR2 PC2-5300, DDR2 (non-ECC)
Maximum Memory: 2GB
Slots: 2
Each memory slot can hold DDR2 PC2-5300 with a maximum of 1GB per slot.*
*Not to exceed manufacturer supported memory.
Although the memory can be installed one module at a time, the best performance comes from using matched pairs of modules.

I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_8b8c2cd6ce148309

Jul 02, 2011 | E-Machines T5082 PC Desktop

1 Answer

I want to know that shall i put pentium 4/ 2.4 Ghz/ 533 Fsb/ Processor on this Gigabyte 845GVM-RZ board? will it support ?and i have 1 Gb ddr1 400 mhz ram will this work on this Board?


Yes for the Intel Pentium 4/2.4GHz/533FSB processor. (Socket 478)

http://en.wikipedia.org/wiki/List_of_Intel_Pentium_4_microprocessors#Northwood_.28130.C2.A0nm.29

(Scroll through. What sSpec number is on top of the processor's case? {You are following Anti-Static Precautions, correct? }

Won't support better than a Prescott Core Pentium 4. (Next chart down)

The Gigabyte GA-8I ((Supports 400MHz or 533MHz FSB)

NO to the Ram Memory.
The Gigabyte GA-8I845GVM-RZ supports DDR Sdram at 333Mhz. (PC2700)
IMHO it will not support DDR Sdram at 400MHz. (PC3200)

My reasoning is this;

Ram Memory typically operates at half of the FSB frequency rate of the Processor.

Processor FSB > MAXIMUM frequency rate is 533MegaHertz for the GA-8I845GVM-RZ
Ram memory at 333MHz is doable.
Not 400MHz.

No, you won't be able to overclock, and bring the FSB of the Processor high enough for PC3200 Ram Memory.
(The rest of the motherboard wouldn't work anyway if you did. PCI Express bus, PCI bus, etc., would not match)

http://www.newegg.com/Product/Product.aspx?Item=N82E16813128238&cm_re=Gigabyte_GA-8I845GVM-RZ-_-13-128-238-_-Product

Have more questions concerning this, or comments, please post in a Comment.
Regards,
joecoolvette

Nov 08, 2010 | Gigabyte GA-8I845GVM-RZ Motherboard

2 Answers

How do i change the memory bus speed on my dell optiplex 170l? The CPU is an Intel Celeron 2.4GHz. The mother board processor speed is 400MHz and the Bios indicates a memory bus speed of 266MHz and does...


You checked in the right place as far as looking in the BIOS, however, memory and CPU sockets do not necessarily have the same buss speed. My FSB runs at 1066Mhz and my RAM at 800Mhz, it all depends on what type of RAM you buy as to the bus speed. You can up the bus speed on your RAM if you wish to reduce bottle-necking, but I've only done that a few times. In order to adjust anything, you must set the settings to manual. Be careful when you change this stuff around though, voltages must also be adjusted accordingly.

Feb 28, 2010 | Dell OptiPlex 170L PC Desktop

3 Answers

I want to upgrade my ram for my pc...atmost to how much i can upgrade and in each slot individually how much capacity of ram it supports ...my motherboard is 915glvg


i would like to inform you that *********** board supports upto 4 gb ram and 2 gb in 2 slots will be the best combination but depends on the OS you are using if its 32 bit XP or Vista it wont accept more than 3 gb so if you wish to use your system in full throttle mode upgrade you r OS to 64 bit XP or Vista and enjoy all 4gb standards that you actually wish to but even 3 gb is like playing with wild fire that will be really too fast processing speed and thrilling performance that you expect.

thanks and regards
kindly rate this solution

Oct 28, 2009 | Intel D915GLVG Motherboard

3 Answers

Why my mother boarb ASUS P5P800S did not run for DDR 400 I want computer more faster my DDR I used now is only 256


hi, actually that 400 is not the ram speed. its the ram frequency. DDR ram comes in 3 types of frequency. one is 333hz and another is 400hz. normally people use 400hz. you should not put two kinds of RAM modules with different frequency at same time.
make sure. all the rams you are using are of same speed and same frequency. example use 256 of 400hz with 256 of 400hz. this must help. else revert back to us. thank you sweet rascal

Oct 18, 2009 | ASUS P5P800S Motherboard

4 Answers

Memory ram


According to SiS® official document, SiS® 748 chipset has limitation DDR supports:
CPU at FSB 200MHz mode, it will NOT support DDR400
CPU at FSB 333MHz mode, it will NOT support DDR200
CPU at FSB 400MHz mode, it will NOT support DDR200/DDR266

Depends on chipset http://www.asrock.com/mb/overview.asp?Model=K7S8XE

Jul 22, 2009 | Computers & Internet

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