P4V8X-X
in [Asus]
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From: s|a.PPy on 15 Aug 2005 00:33 This is my first time to this site, so if this question has been answered I apologize. I currenty have a P4V8X-X ASUS motherboard with a 3.0 prescott p4 processor. I have built my computer from scratch, and am almost done. My motherboard will support pc2700 and pc3200 ddr ram. I currently have a radeon x800xl as a graphics card, but with a bigger heat sink on the graphic card as well as the processor. This motherboard will max out at 3gigs of ram. Will there be any difference in speed if I put 3 gigs of 2700 ram verses 3 gigs of 3200, and if so what will it do. If not thank you for your time.
From: Paul on 15 Aug 2005 02:38 In article <5WULe.6965$XY5.6825(a)fe09.news.easynews.com>, nrmeans1422(a)hotmail-dot-com.no-spam.invalid (s|a.PPy) wrote: > This is my first time to this site, so if this question has been > answered I apologize. I currenty have a P4V8X-X ASUS motherboard with > a 3.0 prescott p4 processor. I have built my computer from scratch, > and am almost done. My motherboard will support pc2700 and pc3200 ddr > ram. I currently have a radeon x800xl as a graphics card, but with a > bigger heat sink on the graphic card as well as the processor. This > motherboard will max out at 3gigs of ram. Will there be any > difference in speed if I put 3 gigs of 2700 ram verses 3 gigs of > 3200, and if so what will it do. If not thank you for your time. Your motherboard's Northbridge has a single channel memory interface. In the manual, it says: "PC3200 DDR DIMMs max to 2 DIMMs only" You could put 2 x 1GB (in slot 1 and slot 3) of PC3200 memory. That is what I would choose. (For most games, 1GB total memory is sufficient. I have seen 2GB total memory mentioned as useful for one game, so that should be enough for quite a while.) You might still have problems at that memory bus speed, so it might still be necessary to drop the memory clock - DDR400 is a pretty demanding rate for most single channel motherboards. Do you have a reason for wanting 3GB of memory ? If you have an application that is demanding of memory, it is time for you to upgrade the motherboard. A P4C800-E Deluxe would be a good choice, and allow your socket 478 processor to be reused. (I.e. If you are using Photoshop, a dual channel memory interface will allow faster manipulation of large images. A dual channel board solves two problems - more memory bandwidth, and four usable slots, versus the two usable slots on your three slot board.) If you are on a budget, any of the P4P800 family boards (865PE Northbridge) are also good candidates for you, as long as you are not planning on overclocking by 25% or more (they work fine at stock speed). According to the manual, FSB800 is an overclocking mode for your P4X533 Northbridge. You will have more room for increasing the CPU clock on a P4Pxxx/P4Cxxx board. The four DIMM slots on the Intel based boards can run in dual channel mode, and you could run 4x1GB DIMMs if you want. They could run at around DDR440 (equiv. to PC3500 or so). I doubt the P4V8X-X will be able to match that. Also, when buying the memory, there are different types of 1GB modules. For example, look at this advert: http://www.portatech.com/catalog/memory.asp?ID=285 The two more expensive modules use (16) 64Mx8 chips. They are $117 and $98. They have normal bus loading, for your memory bus. It would be safe to buy two of those for your P4V8X-X. The cheap module on the right uses (16) 128Mx4 chips, which means all 16 chips form one bank. This module will overload certain control signals on the memory bus. While you may be able to use just one of these on your motherboard, running two of them might not work very well at all. So, do not be tempted by dirt cheap modules - buy something with 64Mx8 chips on it. Crucial, Kingston, and the other name brands, will not sell you a 128Mx4 module, and they will sell the 64Mx8 type. The 128Mx4 memory chips should really only be used on registered modules, but where there is a buck to be made, there will be non-compliant products like those 128Mx4 based modules. Paul
From: s|a.PPy on 15 Aug 2005 11:33 What is the difference between Dual Channal DDR and DDR. Am I able to use the same memory.
From: Paul on 15 Aug 2005 13:42 In article <kB2Me.17222$PI2.13267(a)fe03.news.easynews.com>, nrmeans1422(a)hotmail-dot-com.no-spam.invalid (s|a.PPy) wrote: > What is the difference between Dual Channal DDR and DDR. > Am I able to use the same memory. The DIMMs do not change, between Dual Channel and Single Channel. There are several ways to construct a Dual Channel interface. On an Nforce2 chipset, for example, the memory modules are virtually independent of one another. There is no matching requirement on that chipset. The memory controller works in dual channel mode, for as long as there are matching quantities of RAM on the bus. If there is 600MB of memory on one channel, and 456MB of memory on the other channel, the first 2x456MB would operate in dual channel (128 bits) mode, and the last 600-456=144MB would operate in single channel. (I've tested this with a three line mod to memtest86, and it really works.) On Intel chipsets, I think the very latest chipset has requirements almost as relaxed as the Nforce2. For the 875 and 865PE, DIMMs sitting in equivalent spots (like A1 & B1) have to match in their addressable dimensions. That is because the address bus on each channel uses identical address information, so for the modules to operate in "lock-step", the modules have to be addressed the same way. Each memory chip has a multiplexed address bus. Row and column address bits ride on that bus. The memory is a rectangle inside the memory chip, and the row and column address pick a location in the chip. The memory also is chopped into four separate banks (logically speaking), so we are talking about three dimensions from a logical addressing perspective, even though the memory is planar. At the next level, is the fact that a module can be single or double sided. While that concept is easy to remember, it is not exactly precise. DIMM modules have 64 bit wide data busses, and if you put 8 chips side by side, each one having 8 data bits, that is enough to make the required 64 bit width. Another way to make a "rank" of memory, would be to use 4 chips that are 16 bits wide. Or, an illegal configuration would be to put 16 chips of 4 bits wide each together (due to bus loading issues). A DIMM has enough control signals for up to 2 ranks of memory. A standard 512MB DIMM has two groups of 8 chips each. That is (8) x8 on one side of the module and (8) x8 on the other side. The memory chips used are 32million locations by 8 bits, or 32Mx8 in a shorter notation. A second way to make a 512MB module (not too common yet), is to use 64Mx8 chips. In this case, we have a single rank of (8) x8 chips. The other side of the DIMM is blank. But each chip is 64Mx8, so the row and column addressing cannot be the same as for a 32Mx8 chip. If I mix an 8 chip 512MB module with a 16 chip 512MB module, they do not match in their addressing dimensions. They cannot run dual channel on the Intel chipset. Since the dominant way of making 512MB modules results in many (16) x 32Mx8 designs, odds are very good that you can mix a Samsung module with a Micron module etc. The 8 chip DDR modules are more expensive, and you have to look hard to find them. Timing is another issue. But a good BIOS will read the speed info from each DIMM, and simply pick the slowest timing from all the DIMMs, when setting them up. Timing should not really be an issue. When you buy dual channel memory, the modules themselves are no different than any single channel memory. But, the manufacturing process used to make them is very similar. At the very least, the rows/columns/banks/ranks are matched. The timing ("2-3-2-6") matches as well, although that is not a strong technical requirement. The contents of the SPD EEPROM on the DIMM, that holds the speed info, will match (except for the serial number). With 128MB and 256MB DIMMs, the situation is more fluid. There are different ways of making modules, in many cases visible from the outside (if there are no heat spreaders in the way), that will make the modules unmatched. The Intel chipset will use them in "virtual single channel" mode, meaning you won't get the same level of performance as you would if they were dimensionally matched. The matching requirement on Athlon64 seems to be different than on Intel chipsets. It seems the BIOS, at least, is demanding more parameters match, than would be used on a board like an 875/865 based chipset. As you can see from recent postings to this newsgroup, people are still trying to figure out what will work, and perhaps later BIOS will improve things. Technically, revision E silicon for 64 bit AMD processors, have similar capabilities to the Intel chipsets, but it may be a while before a good BIOS makes this apparent. (Document 26094 on the AMD site is the best reference available.) So, to summarize, if you are using two 512MB DIMMs, chances are very good they will match well enough to be used in dual channel mode on a new motherboard. You could use, for example, a pair of 512MB DIMMs, and a pair of 1GB DIMMs. In the previous example, there are slight performance advantages to using four matching DIMMs, versus two pairs of matching DIMMs. In the first case, the memory controller can be put in an interleaved mode, which means logically adjacent memory locations are in physically different DIMMs. Using pairs of DIMMs that aren't the same size, while the memory is still dual channel, means interleaving cannot be enabled. The performance loss is not worth fretting about, and is quite miniscule in real world terms. The memory requirements are also stated in these two Intel documents. Have a look at this, and compare to the inventory of modules you have in your hand. 865P memory guide (for P4P800 type boards) ftp://download.intel.com/design/chipsets/applnots/25303601.pdf 875 memory guide (for P4C800 type boards) ftp://download.intel.com/design/chipsets/applnots/25273001.pdf Also, when shopping for a board, do not get an 848P board, as I believe that is a single channel version of the 875/865 and will be no more useful than your P4V8X-X board to you. In terms of buying "dual channel memory", where two DIMMs are packaged together, you should not have to pay a premium for the fact that two DIMMs were pulled from a big barrel and slapped into a retail package. The price of two individual DIMMs should match the price of two DIMMs packaged together. There is no "secret matching process" being used. There is also nothing contained inside the DIMM that says "dual channel only" or the like. Since the DIMMs came from the same big barrel of parts, we know their physical construction is identical, and that is what you are getting when the DIMMs are packaged as duals. If getting 1GB modules, get ones with (16) 64Mx8 chips. Ask your vendor if in doubt. If getting 512MB modules, (16) 32Mx8 are the most common design. For smaller modules, there are too many construction techniques to list. Memory is too cheap now, to worry about such small modules. HTH, Paul
From: DaveW on 15 Aug 2005 19:32 Yes! The PC3200 RAM uses a faster bus speed (400MHz) than the PC2700 (333 MHz). Your CPU is based on a 400 MHz bus speed so definitely ONLY use PC3200 sticks of RAM. -- DaveW "s|a.PPy" <nrmeans1422(a)hotmail-dot-com.no-spam.invalid> wrote in message news:5WULe.6965$XY5.6825(a)fe09.news.easynews.com... > This is my first time to this site, so if this question has been > answered I apologize. I currenty have a P4V8X-X ASUS motherboard with > a 3.0 prescott p4 processor. I have built my computer from scratch, > and am almost done. My motherboard will support pc2700 and pc3200 ddr > ram. I currently have a radeon x800xl as a graphics card, but with a > bigger heat sink on the graphic card as well as the processor. This > motherboard will max out at 3gigs of ram. Will there be any > difference in speed if I put 3 gigs of 2700 ram verses 3 gigs of > 3200, and if so what will it do. If not thank you for your time. >
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