Tom's Hardware > Forum > CPU & Components > CPUs > Dell ripoff or not? 955X chipset, 800 MHz FSB, what RAM???

Dell ripoff or not? 955X chipset, 800 MHz FSB, what RAM???

Forum CPU & Components : CPUs - Dell ripoff or not? 955X chipset, 800 MHz FSB, what RAM???

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watso   11-14-2005 at 09:07:26 PM

Hi all:

I've bought a new Dell Workstation 380 with a Pentium D 830, 3 GHz/800 MHz FSB, and 1 GB of DDR2-667 (5400) RAM.

My understanding is that the right RAM for an 800 MHz FSB is DDR2-400, but the 955X chipset doesn't even support that

What gives? Why sell a mismatched CPU/chipset/RAM? Is there any benefit to DDR2-667 with this chipset/CPU combo, or is Dell just upselling more expensive RAM to dummies like me???

Also, Intel doesn't say it, but does the 955X support DDR2-800?

Thanks!

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fishmahn   11-14-2005 at 10:44:29 PM
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Huh? I'm almost certain (having never used one myself...) that it can support DDR2-400. I'm making an assumption here, but I think the mobo can run DDR2-800, but it may not be able to run it at full speed - it may end up running it at 667. (just like using PC3200 in a PC2100 mobo) They may come out with an update to properly support it...

The latency of DDR2 is higher than DDR1, so having the faster ram helps overcome the latency delays (3 ticks of latency at DDR667 = <2 ticks of latency at DDR400).

So, the faster memory is going to perform better.

Mike.

Reply to fishmahn
endyen   11-15-2005 at 02:27:29 AM
- 0 +

I doubt that the ram is going to be your problem. You really should have come before you bought.

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dannyaa   11-17-2005 at 08:47:05 PM
- 0 +

The RAM is fine that's a normal setup, its not mismatched, and Dell isn't upselling. Google some info on DDR2 RAM.

Reply to dannyaa
K8MAN   11-23-2005 at 01:45:55 AM
- 0 +

I know they have small amount of O/Cing on the XPS line so thats why they'd have the 667 on those but i'm not sure why they are putting 667 in non-o/cing 533fsb mobo's. Better upgrade path i guess.....

Reply to K8MAN
spman_1   11-23-2005 at 02:37:35 AM
- 0 +

Quote :

Huh? I'm almost certain (having never used one myself...) that it can support DDR2-400. I'm making an assumption here, but I think the mobo can run DDR2-800, but it may not be able to run it at full speed - it may end up running it at 667. (just like using PC3200 in a PC2100 mobo) They may come out with an update to properly support it...

The latency of DDR2 is higher than DDR1, so having the faster ram helps overcome the latency delays (3 ticks of latency at DDR667 = <2 ticks of latency at DDR400).

So, the faster memory is going to perform better.

Mike.


agree!!!!!!!!

Reply to spman_1
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