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Difference between RDRAM and DDR for P4 System?!?!?

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x86

Banned
I am planing on building a P4 system but there are so many memory choices out there that it is hard to make a decision. What are the differences between DDR-SDRAM and RDRAM? The prices of RDRAM are practically on par with DDR. I could use some help.

By the way, which is the best chipset for DDR? I am looking for stability, compatability, and performance.

Thanks

-DocSmarts
 


<< I am curious. Why are u going with a P4? >>



LOL. You must have missed his previous thread about his AMD chip flamed up.
 


<< Crucial makes the best ddr.

I am curious. Why are u going with a P4? >>



It has better overclocking potential and it has great heat management technology and thus is less flammable than its XP counterpart.
 
The main advantage of RDRAM is bandwidth. PC800 has a bandwidth of 3.2GB/s due to its dual channel nature. PC1200 has a bandwidth of 4.8GB/s, again due to its dual channels. Currently the highest bandwidth offered by DDR SDRAM is 2.7GB/s. This 500MB/s disparity is probably only noticeable in applications that make great use of bandwidth, such as multimedia apps, rendering, and bandwidth intensive games like Q3.

The advantages of DDR are cost (barely), latency, and slightly higher overclocking potential. In the end the choice is yours. You will probably not be dissapointed either way. Comparing PC2700 to PC800 is like comparing the XP2000+ to the P4 2.0Ghz. They both kick booty.


Here's some interesting specs on DDR II:

As part of the preliminary spec, JEDEC approved 400 and 533MHz DDR chips. Comparable DDR memory modules would carry the PC3200 nomenclature for a 3.2Gbyte/s bandwidth using the 400MHz chip, and PC4300, with a bandwidth of 4.3GBytes/s for the 533MHz chip.

 
I am curious. Why are u going with a P4?

I'm curious as to why everyone thinks the P4 is such a horrid processor. So what if its expensive, it's still fast and if someone is willing to fork over a few extra bones why not get a P4?. They run cooler, offer a wider selection of motherboards, and offer that Intel name of course. The P4 is a good proc., I own an Athlon XP simply because I dident have the extra cash for a P4, but I certainly wouldent mind having a new northwood with RDRam.
 
RDRAM chipsets: i850

DDR chipsets in terms of speed: SIS 645, P4X266A, P4X266, i845D, Ali Magik P4 (the new one)

Sis645 is faster than i850 if you can get a stick of PC2700 ram. DDR boards seem to overclock better, and they seem to be more stable.

i845D is probably the most stable since Intel made it. But like the SDRAM enabled i845, it's kinda slow when compared to SIS645 and P4X266A.

BTW, IMHO, your best bet is to build an AMD system again. You've learned your lesson, and you won't fry it again. This way, the overall system cost will come out less than if you build a P4 system right now.

<---has RMAed a mobo twice already. First time, I accidently got an 8KHA instead of an 8KHA+, and second time, 8KHA+ was busted.
 


<< RDRAM chipsets: i850

DDR chipsets in terms of speed: SIS 645, P4X266A, P4X266, i845D, Ali Magik P4 (the new one)

Sis645 is faster than i850 if you can get a stick of PC2700 ram. DDR boards seem to overclock better, and they seem to be more stable.

i845D is probably the most stable since Intel made it. But like the SDRAM enabled i845, it's kinda slow when compared to SIS645 and P4X266A.

BTW, IMHO, your best bet is to build an AMD system again. You've learned your lesson, and you won't fry it again. This way, the overall system cost will come out less than if you build a P4 system right now.

<---has RMAed a mobo twice already. First time, I accidently got an 8KHA instead of an 8KHA+, and second time, 8KHA+ was busted. >>



You mentioned that the 845-D is kind of slow. I have read the reviews and the other contenders take the lead by a marginal 1%-4%. At what %age will one notice the speed difference?
 
I haven't seen many i850/i845-D/SiS635/P4X266 comparisons, but GamePC did post such a comparison last Wednesday. I've ranked the results from each benchmark. To say that i845-D is a slouch compared to i850 or SiS635 is unfounded:

SiSoft Sandra 2002
1) i850 (26% faster than i845-D)
2) SiS635 w/PC2700
3) i845-D
4) SiS635 w/PC2100

Sciencemark
1) i845-D
2) i850
3) SiS635 w/PC2700
4) SiS635 w/PC2100

3DMark 2001 Default Benchmark - 1024x768x32
1) i850 (2% faster than i845-D)
2) i845-D
3) SiS635 w/PC2700
4) SiS635 w/PC2100

3DMark 2001 Default Benchmark - 1600x1200x32
1) i850 (0.7% faster than i845-D)
2) i845-D
3) SiS635 w/PC2700
4) SiS635 w/PC2100

Valley of the Jaguars Demo - 1024x768x32
1) i850 (6% faster than i845-D)
2) i845-D
3) SiS635 w/PC2700
4) SiS635 w/PC2100

ATDemo8 - High Quality - 1024x768x32
1) i850 (2.5% faster than i845-D)
2) i845-D
3) SiS635 w/PC2700
4) SiS635 w/PC2100

ATDemo6 - High Quality - 1024x768x32
1) i850 (1.6% faster than i845-D)
2) i845-D
2) SiS635 w/PC2700
3) SiS635 w/PC2100

Photoshop 6.01 Filter Benchmark (v.2)
1) i850 (3% faster than i845-D)
2) i845-D
2) SiS635 w/PC2700
3) SiS635 w/PC2100

3D Tank Model Rendering Time
1) SiS635 w/PC2700 (0.6% faster than i845-D)
2) i845-D
3) SiS635 w/PC2100
4) i850

50MB MPEG Video to Windows Media Video Encode
1) i850 (1.8% faster than i845-D)
2) SiS635 w/PC2700
3) i845-D
4) SiS635 w/PC2100

200MB Wav to MP3 File Encoding Time
1) i850 (1.4% faster than i845-D)
1) SiS635 w/PC2700
1) VIA P4X266
2) i845-D
2) SiS645 w/PC2100

 


<< I am planing on building a P4 system but there are so many memory choices out there that it is hard to make a decision. What are the differences between DDR-SDRAM and RDRAM? The prices of RDRAM are practically on par with DDR. I could use some help.

By the way, which is the best chipset for DDR? I am looking for stability, compatability, and performance.

Thanks

-DocSmarts >>




I've tried both on the northwood processor.

The i850 will give you better 3dmark scores.

The i845 will give you better overclocking.

Both are great boards.

Starcutter is exactly right.
 
Docsmart your a dumb@$$, going intel cuz ur too stupid. Blaming amd for something thats ur fault.😀


Edit: I hope ur p4 combusts and explodes right in ur face! 😉
 


<< Docsmart your a dumb@$$, going intel cuz ur too stupid. Blaming amd for something thats ur fault.😀


Edit: I hope ur p4 combusts and explodes right in ur face! 😉 >>



That was unecessary. All I asked for was for some advice and you insulted me. So screw you! You are just an AMD zealot that can't accept the facts.

-DocSmarts
 


<< I haven't seen many i850/i845-D/SiS635/P4X266 comparisons, but GamePC did post such a comparison last Wednesday. I've ranked the results from each benchmark. To say that i845-D is a slouch compared to i850 or SiS635 is unfounded:

SiSoft Sandra 2002
1) i850 (26% faster than i845-D)
2) SiS635 w/PC2700
3) i845-D
4) SiS635 w/PC2100

Sciencemark
1) i845-D
2) i850
3) SiS635 w/PC2700
4) SiS635 w/PC2100

3DMark 2001 Default Benchmark - 1024x768x32
1) i850 (2% faster than i845-D)
2) i845-D
3) SiS635 w/PC2700
4) SiS635 w/PC2100

3DMark 2001 Default Benchmark - 1600x1200x32
1) i850 (0.7% faster than i845-D)
2) i845-D
3) SiS635 w/PC2700
4) SiS635 w/PC2100

Valley of the Jaguars Demo - 1024x768x32
1) i850 (6% faster than i845-D)
2) i845-D
3) SiS635 w/PC2700
4) SiS635 w/PC2100

ATDemo8 - High Quality - 1024x768x32
1) i850 (2.5% faster than i845-D)
2) i845-D
3) SiS635 w/PC2700
4) SiS635 w/PC2100

ATDemo6 - High Quality - 1024x768x32
1) i850 (1.6% faster than i845-D)
2) i845-D
2) SiS635 w/PC2700
3) SiS635 w/PC2100

Photoshop 6.01 Filter Benchmark (v.2)
1) i850 (3% faster than i845-D)
2) i845-D
2) SiS635 w/PC2700
3) SiS635 w/PC2100

3D Tank Model Rendering Time
1) SiS635 w/PC2700 (0.6% faster than i845-D)
2) i845-D
3) SiS635 w/PC2100
4) i850

50MB MPEG Video to Windows Media Video Encode
1) i850 (1.8% faster than i845-D)
2) SiS635 w/PC2700
3) i845-D
4) SiS635 w/PC2100

200MB Wav to MP3 File Encoding Time
1) i850 (1.4% faster than i845-D)
1) SiS635 w/PC2700
1) VIA P4X266
2) i845-D
2) SiS645 w/PC2100 >>



Thanks for your time in going through all of that. I really appreciate it.

-DocSmarts
 


<<

<< I am planing on building a P4 system but there are so many memory choices out there that it is hard to make a decision. What are the differences between DDR-SDRAM and RDRAM? The prices of RDRAM are practically on par with DDR. I could use some help.

By the way, which is the best chipset for DDR? I am looking for stability, compatability, and performance.

Thanks

-DocSmarts >>




I've tried both on the northwood processor.

The i850 will give you better 3dmark scores.

The i845 will give you better overclocking.

Both are great boards.

Starcutter is exactly right. >>



Is the difference in performance noticable?

-DocSmarts
 


<< That was unecessary. All I asked for was for some advice and you insulted me. So screw you! You are just an AMD zealot that can't accept the facts.

-DocSmarts >>



Yes it was, but the good thing is he's in the minority 🙂

Good luck with your purchase!
 


<< I've tried both on the northwood processor.

The i850 will give you better 3dmark scores.

The i845 will give you better overclocking.

Both are great boards.

Starcutter is exactly right. >>



Is the difference in performance noticable?

-DocSmarts[/i] >>



In a word, no 🙂 And actually, I found the i845 is a bit more stable.

Small things like Tribes 2 not locking up loading a map and having to reboot. It used to do that like twice a month. And the display properties was a bit slow as well.

Bottom line, both are great, but if your an overclocker the choice is clearly the i845. I got 100mhz more out of it than the i850.

But it has made keeping AmusedOne one off my butt on 3dmark hard as hell! 😀
 


<< Small things like Tribes 2 not locking up loading a map and having to reboot. It used to do that like twice a month. And the display properties was a bit slow as well. >>



would that be a fault of the motherboard/processor (stability issues), or just the game?
 


<< RDRAM chipsets: i850

DDR chipsets in terms of speed: SIS 645, P4X266A, P4X266, i845D, Ali Magik P4 (the new one)
 >>

There are two RDRAM chipsets, the i850 and the i860. Of course, the i860 is dual processing with the Intel Xeon...
You also left out a DDR chipset, namely, the SiS 650. It's probably about as fast as the P4X266. Next, the SiS 645 is not necessarily faster than the Via P4X266A. In some applications, the P4X266A is faster. And when the two are given the same type of RAM, the P4X266A easily outpaces the SiS 645. As for the ALi chipset, you're thinking of the craptacular ALi ALADDiN. The engineering team at Acer Labs that created the ALADDiN should be fired and never let into the semiconductor industry ever again. Something of note is that the i850 really isn't a good chipset. If it weren't for RDRAM, it'd probably be slower than the i845D.
 
I hear that motherboards with Intel chipsets dont fare too well when you pour water on them while running. I havent heard anything definitive about the processors themselves though. You may want to ask about the water solubility of those from someone who has tested it already.

 
Oh really, when you poor water on an electronic board, it doesn't fare well.......gee. Either way, as far as heating, the P4's doesn't get as hot as the AthlonXP's, although not much of a difference. The main thing is that it has a throttling mechanism that will prevent overheating and burning of the chip. For DocSmart, it may be just the thing he needs 🙂
 


<< i845 is a bit more stable than what? >>

Nothing. That's a myth.
On the other had, the i845 does overclock farther than the SiS 645, but not necessarily farther than the P4X266A.
 
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