A64 OC - high bandwidth or low latency?

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morfinx

[H]ard|Gawd
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Feb 18, 2005
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Which would yield better performance for an A64 system? Higher bandwidth but looser timing (say 230Mhz@2.5-3-3-6), or tight timing but lower bandwidth (say 200Mhz@2-2-2-5). Assuming that the multiplier and memory divider are adjusted so that the processor runs at the same frequency for either configurations.
 
charles555 said:
Low latency Yields higher bandwidth with Athlon 64's
Click to expand...

So you are saying it's better to run the memory at 200Mhz@2-2-2-5 rather than 230Mhz@2-3-3-6?
 
lets hypothetically say someone got 250 mhz 2-2-2-5... any difference for a64 vs 200 mhz? (wondering if its capped)
 
I think it's a very real posibility. (the bandwidth cap)

I get 1554Mb/s on the settings in my sig. I will try lowering and edit this post later.

EDIT: the only cap is the computer restarting when your DDR/Chipset's FSB is maxed. Otherwise the bandwidth is not limited.
 
I get about 3-4fps boost in Doom3/HL2 with my mem @ 240mhz 2.5-3-3-8 1T than 2-2-2-5 1T @ 200mhz.. ( both @ 2.4ghz )
 
as long as the frequency is 20mhz or higher then frequency is going to give you much better results and remember cl2.5-3-3-7 isnt a crappy timing.
 
So which is it? Here we have some that say low latency is better, some say high bandwidth is...
 
morfinx said:
So which is it? Here we have some that say low latency is better, some say high bandwidth is...
Click to expand...

If you can get a big enough increase in freq ( 200 to 240+ ) then looser timings are better since you have the extra power. If the difference is small ( 200 to 220ish ) then tighter timings are better.
 
get everest.
bandwidth doesn't matter, the latency benchmark does. find the optimal balance between timings and clock speed to give the best latency ;)
 
(cf)Eclipse said:
get everest.
bandwidth doesn't matter, the latency benchmark does. find the optimal balance between timings and clock speed to give the best latency ;)
Click to expand...

whatcha mean by get everest?
 
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