Are DDR2 slots backwards compatible with DDR?

clickynext

Platinum Member
Dec 24, 2004
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I think my agp/DDR motherboard died, and I can't find a place near me which sells one that does agp/DDR, only agp/DDR2. Can a DDR2 slot use regular old DDR?
 

AmberClad

Diamond Member
Jul 23, 2005
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No.

To expand on that slightly, the bottom key/notch is in a different location for DDR and DDR2.
 

Quiksilver

Diamond Member
Jul 3, 2005
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However there are motherboards that feature both DDR and DDR2 slots.

Also the Pin Count For DDR is 184 while DDR2 is 240.
 

Billb2

Diamond Member
Mar 25, 2005
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Originally posted by: clickynext
I think my agp/DDR motherboard died, and I can't find a place near me which sells one that does agp/DDR, only agp/DDR2. Can a DDR2 slot use regular old DDR?

AGP?...DDR? Your motherboard just told you it's time to upgrade.
 

clickynext

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Dec 24, 2004
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Haha, I've hit a sort of dead end in my upgrade path. My only options seem to be either to get an outdated mobo replacement, or build a new system ($$$). With a Pentium D, GeForce6800, and 2GB ram, it's still fast enough for most of my purposes. The biggest mistake I made last year was upgrading my mobo/proc but still sticking with agp/ddr, since I didn't want to spend the money getting a new vid card/ram.
 

clickynext

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Dec 24, 2004
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Thanks, NXIL, it looks like that mobo is virtually my only choice if I'm to replace only my mobo.

But wow, I didn't realize how overpriced DDR/AGP stuff was these days. Looking at the prices these are selling for used, I could actually sell my old stuff and get better DDR2/PCI-E with no net loss! But it'll take a week or two and I'll be without a computer... =/
 

NXIL

Senior member
Apr 14, 2005
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Dear Click,

to paraphrase BillB above: 1999 called, and wants its AGP motherboard back.

You can cycle the Pentium D into a new socket 775 motherboard, like one of the Abit or Gigabyte P35 boards:

http://www.newegg.com/Product/...ue=717%3a28997&bop=And

"Blood Iron"? yuck.

Video card: 7600GT should be faster than 6800....6800gt?

http://www23.tomshardware.com/...1&model2=716&chart=286

Not hugely different from a 6800 ultra:

http://www23.tomshardware.com/...0&model2=716&chart=308

8600gT is not much more, 8600GTS a bit more:

http://www.newegg.com/Product/...1069%2CN82E16814121096

RAM: dude, this is cheap:

http://www.newegg.com/Product/...6673%2CN82E16820148144

Use your case, HD, power supply, DVD drive, along with Pentium D, get it going: then, later you can drop in a nice quad core as prices continue to fall on those.....and, you have a great upgrade path for a while.

HTH

NXIL
 

clickynext

Platinum Member
Dec 24, 2004
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Sounds good, thanks!

I can't believe people are selling 2x1GB DDR for over $100 on craigslist. Looks like I can recoup my costs.