Benchmark Results: Overclocking, Latency, And Bandwidth
Some of today’s modules are actually rated at 1.65V, but others still tolerate this mild 10% increase very well. That increase also coincides with Intel’s rated memory voltage limit for Core i7 processors, which is why so many “performance” brands use this as their recommended voltage. We used it for both overclock and latency-reduction testing and began by finding the highest achievable data rate for each module set at CAS 9.
We’ve noticed in several past reviews that heat spreaders appear to hinder heat transfer slightly at 1.65V, likely because the low heat produced at this voltage doesn’t efficiently penetrate the thermal interface material, which typically consists of double-sided foil tape. Lacking heat spreaders, Crucial's DDR3-1333 CAS 9 modules once again outpace the competition. This is something that power users must consider when seeking the highest possible memory capacity and frequency in the same part.
Now to find the lowest stable timings of each module set at standard speeds using a 1T command rate.
| Best Timings at 1.65V | |||
|---|---|---|---|
| DDR3-1600 | DDR3-1333 | DDR3-1066 | |
| G.Skill DDR3-1600 CAS 9 F3-12800CL9D-8GBRL | 7-8-7-15 | 6-7-6-12 | 5-6-5-10 |
| Mushkin DDR3-1600 CAS9 Blackline 996776 | 7-8-8-14 | 6-7-7-12 | 5-6-6-11 |
| Crucial DDR3-1333 CAS9 CT2KIT51264BA1339 | 8-8-7-17 | 7-6-6-14 | 5-5-5-11 |
| Patriot DDR3-1333 CAS 9 PGV38G1333ELK | 8-9-7-21 | 6-7-6-13 | 5-6-5-11 |
| Super Talent DDR3-1600 CAS 9 WP160UX8G9 | 8-9-8-14 | 6-8-6-13 | 5-6-5-11 |
Even though we received G.Skill’s high-speed (rather than low-latency) RAM, the brand still achieved the best timings at both DDR3-1600 and DDR3-1333. Power users seeking the shortest response times should be proud of this combination of capacity and latency.
G.Skill’s DDR3-1600 leads in Sandra Memory Bandwidth at its rated speed and minimum stable timings.
G.Skill’s latency win at DDR3-1333 keeps it in the lead at the processor’s standard memory speed.
Crucial managed to pull a surprising latency lead at DDR3-1066 and thus takes the Sandra Memory Bandwidth lead at the same speed.
- Performance PC,
- Hardware,
- 8gb ,
- ddr3 ,
- ram
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Lets not forget 64 bit too eh Rab1d-BDGR ?
what are the timings they refer to... Can someone please explain what the are and how to interpret them?
I've got 2gb 4-4-4-12 DDR2 800 (PC2 6400).
Say I've got a mother board that holds ddr2/3 - Would I see much of a change in frame rate if all the other parts stayed the same?
There is no real difference in speed with memory. This just increases performance for larger applications. You will see maybe a change of 1 or 2 fps in games. Is it really worth it? You must remember that the speed of the memory means that it accesses faster. But if the memory isn't always accessed, then it will make little real difference.
From: http://www.tomshardware.co.uk/foru [...] ad-postingFor more details try http://en.wikipedia.org/wiki/DRAM#Operation_principle
Thank you so much....really appreciated
A little footnote to anyone with triple-channel DDR mobos - if you are thinking of putting three of these kits into your machine for a whopping 24GB of RAM then make sure you are using Windows 7 pro/ent/ult - "Home premium" is limited to 16GB of RAM....If you're rich and/or crazy enough to spend that much on RAM then I'm sure the more expensive OS is small change. :-/
Or Linux.
Look at this loser company Patriot trying to attain credibility and status by charging more for their crappy produce.
reported. for all the good it seems to be doing!