Bursting the Athlon 64 Memory bandwidth bubble - Page 3

jmke · 24th May 2005, 21:25

the "problem" is that you need to drop the command rate to 2T instead of 1T, which will cause performance to drop a little;

the newest A64 revisions do run 4 sticks at 1T

jmke · 24th May 2005, 21:33

Quote:

Originally posted by Haut^Karl

in my humble opinion, I don't believe we "gamers" only play the most recent games and that's all. As you can see from the responses above, we re-encode DVDs & video and play many, many other games & applications.

Here are Gamer's DVD Shrink performance numbers (the article has been updated with this also)

that's ~4% performance increase going from CL2.5 3-3-7 @ 200Mhz to 280Mhz...

Sidney · 24th May 2005, 21:57

Bosw8er · 24th May 2005, 22:25

25th May 2005, 01:28

Quote:

Originally posted by jmke
the "problem" is that you need to drop the command rate to 2T instead of 1T, which will cause performance to drop a little;

the newest A64 revisions do run 4 sticks at 1T

I have certainly not read every article but I remember from one that I did read that 4 sticks was still a no go.

And I've seen tccd at 340'ish 2T get out performed by tccd at 270'ish 1T

I don't know if any of this is a good representation of what we can generally expect with these settings/setups but I would like to see that proven wrong

Sidney · 25th May 2005, 01:49

Quote:

Venice based CPUs have finally learned to work with four double-side memory modules supporting 400MHz.

http://www.xbitlabs.com/articles/cpu...venice_14.html

25th May 2005, 02:12

Thanks for the update JMKE. Looks like getting tighter timings is almost as good as getting the HTT super high. Gives me something to think about.

Sidney · 25th May 2005, 02:53

I believe you could still get higher HTT whenever is allowed in your system; but you could use memory divider instead of getting the super expensive ones. I trust this is the very point JMKE is trying to express.

Everybody has constraints and specially in dealing with money. Why spend $270 on memories in a system with <$150 CPU, like in my case, with slight improvement (a few %)in games?

He indicated spending the money on newer HD, or graphic card would serve your system efficiency better.

All bets are off if you have money to waste; or simply spending money pleases you more.

Sidney · 25th May 2005, 06:11

http://www.xbitlabs.com/articles/mem...-ddr600_4.html

Good illustration here.

jmke · 25th May 2005, 07:23

Quote:

Originally posted by kristos
I have certainly not read every article but I remember from one that I did read that 4 sticks was still a no go.

I was wrong, with older CPU cores the memory speeds drops to PC2700/DDR333

24th May 2005, 21:25	#21
jmke Madshrimp Join Date: May 2002 Location: 7090/Belgium Posts: 79,010	the "problem" is that you need to drop the command rate to 2T instead of 1T, which will cause performance to drop a little; the newest A64 revisions do run 4 sticks at 1T __________________

24th May 2005, 21:57	#23
Sidney Member Join Date: Mar 2004 Posts: 15,738	__________________ lazyman Opteron 165 (2) @2.85 1.42 vcore AMD Stock HSF + Chill Vent II

24th May 2005, 22:25	#24
Bosw8er Member Join Date: May 2002 Posts: 3,711	__________________ "Think of how stupid the average person is, and realize half of them are stupider than that."

25th May 2005, 02:53	#28
Sidney Member Join Date: Mar 2004 Posts: 15,738	I believe you could still get higher HTT whenever is allowed in your system; but you could use memory divider instead of getting the super expensive ones. I trust this is the very point JMKE is trying to express. Everybody has constraints and specially in dealing with money. Why spend $270 on memories in a system with <$150 CPU, like in my case, with slight improvement (a few %)in games? He indicated spending the money on newer HD, or graphic card would serve your system efficiency better. All bets are off if you have money to waste; or simply spending money pleases you more. __________________ lazyman Opteron 165 (2) @2.85 1.42 vcore AMD Stock HSF + Chill Vent II

25th May 2005, 06:11	#29
Sidney Member Join Date: Mar 2004 Posts: 15,738	http://www.xbitlabs.com/articles/mem...-ddr600_4.html Good illustration here. __________________ lazyman Opteron 165 (2) @2.85 1.42 vcore AMD Stock HSF + Chill Vent II

25th May 2005, 02:12	#27
perdomot Posts: n/a	Thanks for the update JMKE. Looks like getting tighter timings is almost as good as getting the HTT super high. Gives me something to think about.

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