8 Krypton

RE: Dell Dimension 4700 RAM upgrade to 4GB doesn't work, causes bizarre behavior

The 4700 chipset with PCI-E 1.0 and DDR2 ram is too old. Any money invested is a waste.

Newer systems like the Optiplex 620 and up are VERY inexpensive.

And come with windows 7 or 8 or 10 for the cost of windows alone.

A better choice for tradeup to used PC is the Precision 380 or T3400.

http://www.ebay.com/sch/i.html?_nkw=dell+precision+380

http://www.ebay.com/sch/i.html?_nkw=dell+precision+3400

http://www.ebay.com/sch/i.html?_nkw=dell+precision+3500

 

The best choice is the Precision T3500 if you can find it for a reasonable price.

Systems as old as the GX620 can be updated to run 64 bit windows 8.1 or even 10 with little effort.  Investments in them can be carried forward to newer and newer machines aka Directx 11 PCI-E video cards can be used well into the next Decade.

http://www.walmart.com/search/?query=Optiplex%20Tower&sort=price_low&cat_id=3944_3951_132982_1224739...

 


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247
6 Indium

RE: Dell Dimension 4700 RAM upgrade to 4GB doesn't work, causes bizarre behavior

SpeedStep you are incorrect.

 

The Dell Dimension 4700 is not AGP and DDR 1.

 

It is PCI Express (It has a dual-width x16 graphics slot, an x1 slot (and 2 conventional PCI slots)) and Dual-Channel DDR2.

 

I know this as I've had two 4700's and upgraded them both (got the first one in 2004) and I'm using the newer 4700 right now.

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8 Krypton

RE: Dell Dimension 4700 RAM upgrade to 4GB doesn't work, causes bizarre behavior

247- So why are you responding to a thread that's from 2011?

Ron

   Forum Member since 2004
   I am not a Dell employee

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8 Krypton

RE: Dell Dimension 4700 RAM upgrade to 4GB doesn't work, causes bizarre behavior

DDR1 and DDR2 are no longer available in the retail channel.  2 Gig Low Density INTEL compatible ram is going to be hard to find.  The newer systems suggested support Pentium D processors which allow installation of windows 8 or 10.  In most cases its not worth while upgrading a netburst Pentium 4 system.

The PCI-E 1.0 bus in these older chipsets is not likely to work with newer cards and will not work at all with UEFI based cards like the Radeon R series.


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247
6 Indium

RE: Dell Dimension 4700 RAM upgrade to 4GB doesn't work, causes bizarre behavior

The Dimension 4700 has four RAM slots and supports up to 4 GB when four 1 GB DIMMs are installed (two 2 GB DIMMs were installed in my first 4700 at one stage and it seemed to work fine but I'm guessing it probably shouldn't be done that way) however Windows will only see around 3 GB or so even on 64-bit. I don't think the 4700 requires Low Density RAM but I'm just guessing.

 

I have a Pentium 4 in my 4700 and I was using Windows 7 + XP before and now I'm just using Windows 10. Some years ago I installed a Pentium 4 661, 3.6 GHz (0F65h SL9KD D0) (cost a few dollars on eBay) which is 64-bit and supports CMPXCHG16b, PrefetchW, and LAHF/SAHF so even 64-bit Windows 10 can be installed on the 4700.

 

It might not work with all new graphics cards but I just bought an EVGA NVIDIA GeForce GTX 1050 Ti SSC (4 GB) to replace my old GT 240 (512 MB) and it works fine.

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247
6 Indium

RE: Dell Dimension 4700 RAM upgrade to 4GB doesn't work, causes bizarre behavior

The newer 4700 motherboards are possibly PCIe 1.1 not PCIe 1.0a

Screenshot from GPU-Z on my Dimension 4700:

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8 Krypton

RE: Dell Dimension 4700 RAM upgrade to 4GB doesn't work, causes bizarre behavior

PCI-E 2.1 and 3.0 break backwards compatibility with 1.0 1.1 and 2.0.

This also means that newer cards in old systems DO NOT WORK due to several reasons.

1.  There is no more BIOS and Dos VESA mode 103 which the F2 Bios and post use.

2. The speed of the bus gets faster and current fast bus slots DO NOT DOWNCLOCK to accomodate older 1.0 1.1 2.0 cards.

3.  The Line code for PCI-E 1.0 1.1 and 2.0 is 8b/10b is a line code that maps 8-bit words to 10-bit symbols.
4.  The Line code for PCI-E 2.1 and 3.0 is 128b/130b.
5.  The 3.3v and 12v electrical power spec is broken for backwards compatibility with 2.1 and 3.0. the increase in power from the slot breaks backward compatibility between PCI Express 2.1 cards and some older motherboards with 1.0/1.1/2.0 .


All PCI express cards may consume up to 3 A at +3.3 V (9.9 W).
The amount of +12 V and total power they may consume depends on the type of card:

    ×1 cards are limited to 0.5 A at +12V (6 W) and 10 W combined.
    ×4 and wider cards are limited to 2.1 A at +12V (25 W) and 25 W combined.
    A full-sized ×1 card may draw up to the 25 W limits after initialization as a "high power device".
    A full-sized ×16 graphics card[13] may draw up to 5.5 A at +12V (66 W) and 75 W combined after initialization a "high power device".

Secure boot and the encoding scheme to 128b/130b from the previous 8b/10b encoding of PCI-E 1.0 1.1 2.0 also makes cards either invisible or makes them lock up and never post.  All future revisions including 4.0 and 5.0 use 128b/130b encoding.  This is low level communication between the CPU and the BIOS and the cards.

 


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