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A64 memory type vs P4?

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June 9, 2004 3:51:17 PM

Hey all, I'm trying to build my first computer and have been reading a lot about different mobos, cpus, memory, etc.

I think I've decided on an A64 3000+ system, on what motherboard I havent decided yet. I've gotten the impression that AMD/A64 is better for games vs Intel/P4 rigs?

Anyway on to the point of this post. One thing that still has me scratching my head is memory. First is Dual Channel vs Single Channel, and if one is better than the other on an AMD or Intel chipset? or even for the different cpu's?

Secondly, those 'twin' packs that are out there, such as Corsair 512MB TwinXMS (256x2)Dual Channel...again, the difference of using them on an Intel vs AMD system? I've gotten the impression that AMD/A64 don't make as much use of the twin packs..or wait, was the dual channel....?!?

Hah.. yeah as you can see I'm pretty ass backwards on this right now, I think I tried to assimilate too much info too quick. SO basically if you can just briefly explain the best type of ram for an intel and amd system that would be great. I dont plan on overclocking, although the MSI 865PE Neo2-FIS2R board I was looking at (IF I went Intel) apparently overclocks on it's own when at full load, so do I need more powerful ram for that? I want either pc3200 512MB or 1GB of Corsair, but not sure what type or whats more efficient.

Anyway, sorry for the long post. This is what happens when I try to unconfuse myself. Thanks for any and all help!

More about : a64 memory type

June 9, 2004 4:32:23 PM

A64 doesn't run dual channel, so yes, the benefits of buying a 'twin' pack is minimal. You could always get one if it was cheaper than buying 2 X 512 modules. As fro the P4, some sets support dual channel, if you go with an Intel rig, you should get dual channel, because the pentium procs needs the extra bandwidth. As for the systems, corsair is fine, although I'd go with a gig over 512 if you plan on gaming in the near future.

"Yeah, I got a magazine for you. It's fulla hollow points. You're gonna love it when I put that in a gun, and then put 'em in your brain!" - Carl
June 9, 2004 4:56:27 PM

You'll stick a lot of money in that FIS2R board over the ABIT IS7. The whole lot of FIS2R boards are being discontinued by MSI in favor of the PFISR series. And yes, to clock-up a P4 you need great memory. The minimum would be Crucial PC3200 but a quality PC3700 will please you more. I am currently running Mushkin PC4000 in an 875P NEO-FIS2R and it plain flies! :smile:


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June 10, 2004 6:30:47 PM

thanks guys. I think I've decided on the Athlon64 3000+ w/ the MSI K8T Neo2-FIS2R mobo. So that means whether or not I purchase Dual Channel ram, it is going to run in Single Channel mode because of the Athlon right? I will probably still get Dual Channel anyway just incase of future upgrades.

Now it's just a matter of choosing which brand and speed of ram to buy. I want either Corsair or OCZ. I've read Corsair will work on this mobo, but I'm not sure about how stable the OCZ is?

I'm looking to get PC3200, and I wont likely be doing any over clocking. Both Corsair and OCZ have many different 'models' of DDR that I'm looking at (Canadian prices):
Corsair:
Corsair PC3200C2 512 XMS Dual Channel (2-3-3-6) = $190
Corsair PC3200C2 512 TWIN-XMS Dual Channel (2-3-3-6) = $210
Corsair PC3200C2 1024 TWIN-XMS Dual Channel (2-3-3-6) = $385
I know there is the XL line of XMS that runs at 2-2-2-6 and C2LL which runs at 2-3-2-6. Do these provide noticable increases in performance vs price? or am I better off getting 1GB vs 512MB of 2-3-3-6?

For OCZ:
Performance: 512Mb PC3200 DDR400 Rev.2 (2-3-3-6) = $182
***Is this stuff dual channel? Probably a dumb question but the site doesnt say http://www.ocztechnology.com/products/memory/OCZ_DDR_PC...

Premier: 512Mb PC3200 DDR400 w/Heat Spreaders (2.5-3-3-7) = $152
Premier: 512Mb PC3200 DDR400 Dual Channel Kit (2x256)(2.5-3-3-7) = $175
Premier: 1024Mb PC3200 DDR400 Dual Channel Kit (2x512)(2.5-3-3-7) = $282

There's also the Enhance Bandwidth series from OCZ that runs @ 2.5-3-2-8. It's a good jump in price though. What confuses me about the way the OCZ stuff is labelled is that it only uses Dual Channel in the label for the Kits of ram, and not for just single sticks of it. So I want to make sure that stuff is dual channel also.

I think it was on one of Tom's guides that they said Athlon64 ram runs at 2.5-3-2-6 (best case) and 2.5-3-3-6 (average) and 3-4-4-8 (worst)? Not sure if that really applies to me or not..

If you could make some suggestions as to which way to go in terms of the most bang for my buck that would be great.
thanks
June 10, 2004 10:50:54 PM

Just to clear summik up:
Athlon XP CPU: Can run dual channel but has minimal performance increase (compared with the performance increase with the bandwidth hungy P4).

Athlon64: Can only use single channel RAM

Athlon FX: Can use dual channel RAM, but doesnt have huge performance advantage over the single channel and has to be ECC.

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June 11, 2004 5:51:37 AM

Now that is the simple answer I have been looking for too, lol.
June 11, 2004 5:35:10 PM

Buying a dual channel set is impractical. If at some point, you decide to upgrade, you'll have to go with a new processor and motherboard, since no socket 754 mobo will support dual-channel, and no A64 processor will either. By the time you buy a new mobo, DDR2 will certainly be out, and the mobo you buy (with dual channel) will probably be using it anyway, so that dual channel ddr you have now won't run. Admittedly, some boards will support DDR and DDR2, but really, if you're planning to upgrade extensively, wait 6 months, there are 2-3 big technology leaps coming. Me, I'm building my 3200+ gaming rig in about a month. I don't care about upgrading, it'll scream now, and it'll still be good in 3 years.

"Yeah, I got a magazine for you. It's fulla hollow points. You're gonna love it when I put that in a gun, and then put 'em in your brain!" - Carl
June 11, 2004 9:24:58 PM

Don't take my word as law here, but I'm pretty confident the "twin" labels and the like are just marketingspeak. The dual channel part is handled by the motherboard. It makes good sense to get two identical sticks of memory, sure, but it doesn't have to be labeled as "twin" or whatever. Go with what's cheaper - twin packs or 2 x individual sticks.

As far as timings, I'm not an authority. A while ago I was hearing that the timings were less important with PC3200 than it was with 2700, but confirm before you believe. :) 

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Anonymous
a b } Memory
June 11, 2004 10:11:43 PM

twin pack are usually tested to work well together, they often from the same batch so they should be identical...
CHance are 2X are gonna do fine tough.

Asus P4P800DX, P4C 2.6ghz@3.25ghz, 2X512 OCZ PC4000 3-3-3-8, Leadtek FX5900 w/ FX5950U bios@500/1000, 2X30gig Raid0
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