DDR1 still great performace :P

Yeah it is indeed interesting, espically in the fact that it shows that latencies have a lot to say, combined with a processor that actually needs all that bandwidth. I dropped from DDR2-850 to DDR2-800 and overclocked my processor a bit and in Everest the Memory Bandwidth actually increased with about 100, not much but considering that if i had a good MOBO it would be significantly over that, it's looking like Penryn and Barcelona will add some more fun to the equation :) Also bigger L1 + L2 caches might end up replacing some of the writes to RAM entirely?
 
That DDR isn't even really top of the range, it's like PC3500 cas2.5.
My oldschool Twinmos purchased way back in 2003 does PC3700 cas2 and I dread to think what kind of benches it would get in a decent system.

Heck a guy at work has some OCZ running at cas1.5, that must be pretty brutal when clocked.

It's been shown in direct comparisons before that the gain from DDR2 is very minimal compared to high end DDR. Although I guess once you start getting above PC8500 that DDR2 starts to stretch it's legs.
 
the ram i have is OCZ platinum 2GB kit, the timings are 2-3-2-5 i use cl 2.5 because of the overclock.

Reality|Bites "intergrated memory controller
and the fact it's clocked at 3Ghz, you need a C2D @ 2.4Ghz to match that.

The DDR2 is running with 2T cmd"
Click to expand...

how do figure that? a core2 2.4 (e6600) on defult would run ddr2 533/pc4200.


HangTime. That DDR isn't even really top of the range, it's like PC3500 cas2.5.
Click to expand...

really? i'm sure @cl 2-3-2-5 (in 2GB kit) has the same bandwidth as DDR500 if not better
 
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apart from the latency which will obviously be better on a cpu with an intergrated controller, i dont see whats so amazing?


everest ultimate is giving me a figure of 7463/6143Mb/sec read/write for some moderately overclocked ddr533 DDRII (@350mhz - the equiv. of ddr700)
 
james.miller said:
apart from the latency which will obviously be better on a cpu with an intergrated controller, i dont see whats so amazing?


everest ultimate is giving me a figure of 7463/6143Mb/sec read/write for some moderately overclocked ddr533 DDRII (@350mhz - the equiv. of ddr700)
Click to expand...

was not saying it was amazing unless u read something else, i was pointing out that DDR1 still has very good performance even when DDR3 is cuming into the market.
 
Ronaldo said:
was not saying it was amazing unless u read something else, i was pointing out that DDR1 still has very good performance even when DDR3 is cuming into the market.
Click to expand...


its bested by some slightly overclocked bottom-of-the-range ddrII. while the figures are good, raw memory speeds mean very little in terms of pc performance. you only have to look at s754 a64's and p4's running on ddrI to see that:)
 
E6400 @ 476x8 = 3808MHz @ 1.5V
Crucial 10th Aniv @ 5:6 = 1190Mhz 5-5-5-18-2T @2.4V

Mem Read = 9970MB/s
Latency = 50.2ns

ok, its only bench stable, and only just that, but it gives you an idea what "great performance" really means. Oh, and i'd take a shot at getting it ORTHOS/Memtest stable, but i dont think my Ultra-120 would cope with 1.5V+

currently stab testing at:

E6400 @ 443x8 = 3550MHz @ 1.44V
Crucial 10th Aniv @ 5:6 = 1066Mhz 4-4-4-12-2T @2.3V

Mem Read = 9543MB/s
Latency = 51.7ns

I must admit, my C2D seems to be a pretty good clocker, and the mem clocks pretty well for 4x1GB :D
 
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Despite all those nice high readings, i still think my aging asrock puts in a good showing ;)

Cpu AthlonX2 3800 @ 5000 (260x10) 2x1024 Corsair 3500 3-3-2-6 2T (DDR520)

Read 7546
Write 5375
Copy 5830
Latancy 50.9

Edit, took this oportunity to test low latancy with 166 divider 2-3-2-6 1T (DDR 440)

Read 6577
Write 6559
Copy 5639
Latancy 46.9

Seems now read speed has dropped dramatically to make way for a big write latancy speed up !.
 
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