2400mhz DDR3 vs DDR2 performance difference??

[cl0ck_ed]

Can anyone enlighten me on the performance gains with this new high speed ram that is becoming available. A year ago when ddr3 was introduced there was little performance gains, but now as ddr3 has reached speeds of excess of 2000mhz, is there any noticable benefit?

I have 1000mhz DDR2 4-4-4-12 timings, which gets in everest 8732MB/s read, 10595MS/s write, 7601MB/s copy, 60ns latency.

Now ddr3 can run at 1600mhz cas 6 for example which gets in everest: 18000MB/s read, 16000MB/s write, 21000MB/s copy, 37ns latency

Does this double bandwidth effect gaming performance and general snappiness of the system?

 

[Hemicuda]

I don't know how measurable you could make it. Running at 2400 implies a hefty CPU overclock- to make it an even playing field you would need a suitable memory divider to run 1333 or 1600 speeds for comparison. When overclocking my system I experimented with different dividers to see which would offer the best performance (Crucial Ballistix 2x2Gb - BL2KIT25664AA80A.16FD3)

DDR2-800 @ 4-4-4-12 tRD 8,most other sub-timings at EPP profile, DDR2-1000 @ 5-5-5-15 tRD 9, others as EPP2 profile and DDR2-1066 -same timings. No perceptable difference tho the benchmarks were faster (SuperPi etc). Likewise with an overclock (CPU 450 x 8 =3.6GHz, DDR2-900 (4-4-4-12, tRD 8, tWR 6, tWTR 4, tRRD 3, tRTP 3, tRFC 52, 2T) and DDR2-1160 (5-5-5-15, tRD 8, sub timings the same except for tRFC 54).

Noticeable in benchmarks but nothing too tangible in the real world- of course the DDR3 scales over a wider range but my old second system (P5E3 based) with DDR3-1600 didn't seem any faster than the DDR2-800 tbh.

 

[cl0ck_ed]

Thanks for the replay, thats sort of what i was thinking, as x48 mobos can use ddr2 and ddr3, so they have the potential to use ram that had double the bandwidth and a dramatically reduced latency. Just wondered if the expensive highspeed ram for the newer platforms will incease the speed difference betwwen the new and old platforms, such as 775 vs 1366.

 

[uchihas]

The diference in RAM speed are really low, specially in games, where the diference from DDR3 1333Mhz to 2000Mhz at the same latency are lower than 2fps.

As for now, DDR3 1600Mhz CL7 are the best price/performance generally, mostly for OC (as it's easier than with 1333 ones).

 

[Ham]

as x48 mobos can use ddr2 and ddr3

You know that while the chip can run either, boards are bound to either 2 or 3, not both right? There is a physical difference in the slot.

 

[cl0ck_ed]

You know that while the chip can run either, boards are bound to either 2 or 3, not both right? There is a physical difference in the slot.

There is a gigabyte board that has ddr2 and ddr3 slots on the motherboard. ga-ep35c-ds3r, buts its P35, . The reason why I gave the example of the x48 chipset is because I know that dfi do versions of x48 mobos with either ddr2 and ddr3.

@Ham, I have seen everest memory bandwidth screenies of DDR3 on p55 chipset mobos with huge scores, Does x58 and p55 have higher memory performance than chipsets of 775 socket?

 

[killablade]

MSI X48C also supports both

 

[thestepster]

asus p5kc does ddr2 and 3 i used to have one but i didnt use DDR3 on it and im sure it only supported ddr3 1333

 

[Pyr0]

generally the boards that can use both types of mem aren't very good tho

ever heard the saying: jack of all trades, master of none

Does x58 and p55 have higher memory performance than chipsets of 775 socket?

yes they do, mainly because of the integrated memory controller in the new cpu's

 

[cl0ck_ed]

Ok, found the review that i was looking for compare the memory performence of different platforms and ddr2 vs ddr3.

http://www.bit-tech.net/hardware/cpus/2010/01/27/core-i3-and-i5-memory-performance/1

The actual overall bandwidth of Core i3 and i5 Clarkdale CPUs is a step up from what X48 and DDR3 offered, and certainly more than DDR2, however its access latency is terrible, even when you're not using the onboard GPU. It is only DDR3-1333 at Cl9 we're testing, but even then the Lynnfield CPUs are 50-60 per cent faster at getting to memory: that's a massive difference.