why won't a p4 520j work on ddr3 socket 775 boards?

[rieds]

a friend gave me a p4 520j to build a unit for my girlfriends kids but its not listed on any of the ddr3 socket 775 motherboards. just about every other p4 with 800fsb and 1mb cache is listed. there are 2 520j"s listed on intels ARK web page. one 89w and mine is 84w like all the others. is the 89w one the one they were refering to when they didnt list it on the supported processor list? theres about 5 2.8 and there all listed except the 520j. im stumped. any ideas why? all the specs are the same. i tried to post the link to the intel ark p4 page here so you all can check it out but it wont work for some reason. do i need to just got with a ddr2 board?

 

 

[Braegnok]

You need to provide information, as to which 775 socket motherboard you are installing chip in. The 520J is a Prescott  P4, 2800mhz with 800mhz buss. The J means chip includes execute disable bit feature, the TDP is 84 watts, Both the 520 and 520J are common chips found in most Dell, IBM, Sony type platforms back in the P4 era. So it will work in most basic socket 775 motherboards. But not if your motherboard BIOS does not support it, or offer a update for the Netburst Microarchitecture.

 

In response to your question about ddr3 memory, The 520J chip was released on June 12 2004, And ddr3 memory was just a wet dream in 2004. It was announced in 2005 and released on the market in 2007 with Intel's P35 Bearlake chipset, also ddr3 is not backward compatible with any earler type of random access memory. So it is unlikely you will find a ddr3 motherboard that supports your 520J P4 chip.

 

If you are looking for a inexpensive  compatible motherboard for the 520J, Any Dell OptiPlex 280 series will work fine with some cheep ddr2-800 memory.

Should be a nice pc for the kids to enjoy learning on, for under $50.00

Edited December 17, 2012 by Braegnok

[ohldboy]

i do not agree. If you had a motherboard it would make some sense. As you do not.

A dual core Intel Celeron G540 is about $50

http://www.newegg.com/Product/Product.aspx?Item=N82E16819116408

or a Pentium G860 for $75

http://www.newegg.com/Product/Product.aspx?Item=N82E16819116405

A motherboard about $40-50 on sale Asrock H61M-DGS $53.97 shipped

http://www.newegg.com/Product/Product.aspx?Item=N82E16813157315

memory 2x2gb $17  DDR3 1600

http://www.newegg.com/Product/Product.aspx?Item=N82E16820148542

 

Video is likely much better than thay on a P4 board, you can cheaply upgrade CPU or memory when if required. Celeron combination  $121

I've seen H61 board from $30 on sale

combos

http://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.1161623

 

http://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.1162020

 

http://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.1162005

Edited December 17, 2012 by ohldboy

[rieds]

should have gave some more info. my friend works in the computer department of a technical school so he gets tons of old computer donations. so i will be looking for a motherboard in his collection which will be free. so i was thinking if i can find a motherboard that uses ddr3 memory id go that route for the performance gain in memory since its fairly cheap. otherwise ill go with a 965 chipset as he has plenty of ddr800. the motherboard will be free so the only thing i'd be paying for would be ddr3 memory if i go that route. ive looked at  the cpu support list of all the socket 775 boards on the gigabyte website that accept ddr3 and they list tons of p4's one of them being the 520 wich has the same specs as the 520j so im wondering if its an oversite  and it will work or if theres some difference between the 2 chips im not seeing. there are other p4's with the j on the end listed in the cpu support lists so its not the j. the only thing i see is there is a 520 520j chip listed on the intel ark website thats 89w thats not listed on the cpu support lists that has a different id number than the 520j i have and im wondering if thats the 520j thats not on the support list and my 520j will work.   

[Braegnok]

If the motherboard is free, And still not knowing which board it is.  I would go for the ddr3 board you say the 520, 84 watt, 2800mhz, with bus speed of 800mhz chip is listed on QVL. As the letter :J: Stands for " Includes Execute Disable Bit Feature". Sometimes you get lucky,.. and a chip with a upgraded feature that is not listed on QVL will still fire up and run, but the feature may not work. And any Gigabyte DDR-3 board, would be a far better platform, better BIOS options ,. Than a old Dell 280 OptiPlex  board, I'd go for it     

Edited December 17, 2012 by Braegnok

[ir_cow]

Socket 775 is only ddr2 I thought . Also the pin layout is different so it won't fit if you tried

[Braegnok]

Socket 775 is only ddr2 I thought . Also the pin layout is different so it won't fit if you tried

Come-on! you know lots of socket 775 chipsets support DDR-3, from the P-35 up to the X48. 240 pin on DDR-2 and 240 pin on DDR-3

[d6bmg]

IMO, ditch that old system parts, and build a cheap system using G630. Would be better in terms of performance and longevity.

[l90]

That old cpu doesnt have ddr3 controller just like phenom II 940.

[rieds]

That old cpu doesnt have ddr3 controller just like phenom II 940.

that must be what it is.  i looked a little more and found some boards with both ddr2 and ddr3 slots where it will work and a few with the newer chipsets but only take ddr2 and its listed for those too but none that take ddr3 only. 

 

update:i found it listed on some msi boards with ddr3 only so i don't know why its not listed on gigabyte and asus boards with the same chipset.

Edited December 17, 2012 by rieds

[Waco]

That old cpu doesnt have ddr3 controller just like phenom II 940.

That CPU has no controller. It'll work fine guaranteed.

[EuroFight]

 

That old cpu doesnt have ddr3 controller just like phenom II 940.

That CPU has no controller. It'll work fine guaranteed.

 

 

If I may expand on what Waco said; only recently have chips featured onboard memory controllers, previously, memory controllers were on the motherboard, and the chip merely communicated with the board's controller, thus the standard of memory supported would be determined by the board instead of the processor. More recently, however, chip manufacturers have begun to incorporate memory controllers onto the chip itself (e.g. Phenom II, FX-series, Intel Core series), generally to reduce latency between the memory and the processor, thus increasing performance. There are other reasons too, including it is often easier and cheaper to integrate a memory controller into the processor die than making a completely separate system on the motherboard itself.

 

I hope that has explained what Waco said