Life At 2 GT/s: 6 GB DDR3-2000 Memory Kits Compared

Features
By Thomas Soderstrom
published

Test Results: Overclocking, Latency And Bandwidth

We used the rated timing rather than the product name to identify each kit in the charts below. The model number is still provided for clarity.

At 1.65 volts CPU core and 1.55 volts CPU Uncore, the two CAS 7 rated kits were able to exceed the fastest CAS 8 set by 14 MHz. Super Talent and Kingston modules barely exceed rated speed, but both are also available at steeply discounted prices.

Next, we tested each module set to find its lowest stable timings at the same voltage levels as above. Because DDR3-2000 is not a stock Intel memory ratio, its tests were performed at a base clock of 200 MHz. The motherboard was returned to its original 133 MHz Bclk for DDR3-1866 and DDR3-1600 tests.

Swipe to scroll horizontally
Best Timings At 1.65 V
 DDR3-2000DDR3-1866DDR3-1600
Patriot DDR3-2000 CAS 8PVT36G2000LLK7-7-6-187-7-6-176-6-5-15
Super Talent DDR3-2000CAS 9 WB200UX6G97-7-7-177-7-6-176-6-5-14
G.Skill DDR3-2000 CAS 7F3-16000CL7T-6GBPS7-7-7-177-7-6-176-6-5-16
OCZ DDR3-2000 CAS 7OCZ3B2000LV6GK7-7-7-177-7-7-176-6-7-16
Corsair DDR3-2000 CAS 8TR3X6G20008GTF7-7-8-167-7-7-166-6-6-14
Kingston DDR3-2000 CAS 8KHX16000D3ULT1K3/6GX8-7-8-177-7-6-176-6-5-16

The third-cheapest module set in today’s lineup takes first place in DDR3-2000 timings, while the only CAS 9-rated kit is stuck in a three-way tie with two CAS 7-rated sets. Super Talent’s low-cost modules also place first at DDR3-1600.

There isn’t much bandwidth difference between top contenders at their lowest-stable DDR3-2000 timings. Miniscule inconsistencies between consecutive Sandra tests mean that the “quickest” module didn’t always win, but the slowest modules lose by a larger margin.

Kingston makes an amazing comeback at DDR3-1866, rising to second place. G.Skill remains on top.

Great DDR3-1600 timings for Super Talent’s low-cost modules are revealed in Sandra Memory Bandwidth.

After running our full battery of tests using the stock air-cooling solution, we retested Corsair's Dominator GT TR3X6G2000C8GTF using the company’s new TEC cooler at full-power. Though our system booted at much higher data rates it was only able to pass our stability test at DDR3-2114, with a corresponding clock-rate increase of 0.7%. Further testing did not reveal enhanced latency capabilities, though the device is likely more useful as overheat-prevention in air-restricted six-module configurations.

Thomas Soderstrom
Thomas Soderstrom
Thomas Soderstrom is a Senior Staff Editor at Tom's Hardware US. He tests and reviews cases, cooling, memory and motherboards.
20 Comments Comment from the forums
  • philologos
    Can I make a suggestion? I would like to see a trial, in which the i7's integrated memory controller is overvolted incrementally to death.

    Much has been made since the inception of Nehalem about the offical "safe" vDimm limit of 1.65v. There have been no lack of intrepid overclockers who've pushed this spec to 1.7, even 1.75 volts. I want to see the actual limitation demonstrated in spectacular fashion with pictures. Also, I highly suspect memory voltage on the X58 platform is capable of increasing the CPU heat output; it would be satisfying to see confirmation of this. Give this idea some thought.
    Reply
  • dragonsprayer
    Hey guys, THG is the best! People you need free tech support THG is #1! The article is nice, I wish we had a big comparison to really show - 3 cpu's, different rans....well anyways!!! Good info as always, fact is you do get significant ranges of mem bandwidth at the same settings. You can take different types of ram , set them at the same settings all 100% stable and yes huge swings in membandidth.

    Yes, in in many cases high end ram give slight increases, those ranges of 10-15% are common for bandwidth. Yet the i7 system is so advanced and so far a head of software, the software rarely knows the difference or the results i should say.

    WSZ says: Skip 2000 ram, go for 1600 ram, a 920 at 1500-1700 fsb is untouchable for the pricer to performance provided. THG has show muskin 7-7-7 or slightly higher latecy ram to really blow everyone away.

    We live in the best times, for the advancement of computer parts, we an not shirink for ever!!! We are at 32nm? Then what 3 atoms thickness?

    Yes, AMD really has a good system now with the south bridge 750 oc, but nobody cares - i mean my customers. 7-8-7-20 at 1.65v at 1550 to 1650 is the sweet spot if you can squeeze it out - you may just go with 8-8-8-24 with 6GB of $100 ram. Sweet spot on the 20 multipier is 3.8ghz air cooled. We getting 4.4ghz with water - i toss a photo in for fun - this is mid level system with minmual rads but runs 70-75c at 4.3ghz all day with quad sli: http://s329.photobucket.com/albums/l373/warpedsystems/?action=view&current=WSZ-WCcm-T31.jpg
    Reply
  • dragonsprayer
    philologos -- does not help at all, in fact it just makes the system unstable, skip the stroy why we set thte QPI to 1.65v instead of 1.33v as was to be done. The reuslts:
    system was find, after 3 weeks starting have issues - crashes
    bottom line is do not to it - 1.33-1.35v is fine for most QPI
    Reply
  • doomtomb
    1600MHz DDR3 still provides the best price/performance. Not just that, but there is about 0.5% real world performance gain from higher clocked memory.
    Reply
  • dragonsprayer
    exactly doomtomb
    in fact this has not change for 3 years

    around 1600-1700 is the sweet spot, in highend and exact system, make just one lateny setting lower - we are build 3 systems. one, is a $4000 air cooled system, one is a $5000 water cooled and one is a $6000+ water - these are not gaming sytems.

    Getting the fsb is right is the most important thing in building a system, while i can it fsb in a i7 - it still the memory bus evern if its not fsb or front side bus

    2-2-2-5 ram for ddr400 ddr
    3-3-4-8 ram in ddr800 ddr2
    7-7-7-20 with ddr3
    Reply
  • Crashman
    philologosCan I make a suggestion? I would like to see a trial, in which the i7's integrated memory controller is overvolted incrementally to death.Much has been made since the inception of Nehalem about the offical "safe" vDimm limit of 1.65v. There have been no lack of intrepid overclockers who've pushed this spec to 1.7, even 1.75 volts. I want to see the actual limitation demonstrated in spectacular fashion with pictures. Also, I highly suspect memory voltage on the X58 platform is capable of increasing the CPU heat output; it would be satisfying to see confirmation of this. Give this idea some thought.
    Unfortunately that's impossible. They don't die instantly, they die over a matter of weeks. Intel published a bunch of data on how long the memory controller last at various voltage levels, we're talking several weeks at 1.70v and at least a few days at 1.75v.

    So, when the memory controller finally did die, nobody woul know whether the voltage or time was the most significant factor.
    Reply
  • Kill@dor
    Awesome review Thomas. Thank you for making a great comparison... I still think Kingston's DDR3-2000 is the best value over all. Pushing the CPU past 1.7v core is not an option in my opinion, and anyone with good clocking skills can push a core i7 920+ to 4.0GHz @ 1.25v with this kind of RAM speed and bandwidth. I'm running an (1066 strap)E6600 @ 3.6GHz, 2:8 ratio and 20MB/s dual-channel throughput on DDR2-1200, the 8800GT Superclocked Version and it runs crysis like silk on 2ms 1920x1080p. Super Talent has shown better performance and value in this line and i'm glad to see it as well. This is the kind of performance i have been waiting for and its a great confirmation of what i have been suspecting about these RAM's. The only reason why i haven't changed the graphics is because Nvidia/ATI have not had a significant jump in hardware besides the 4870x2 and GTX295 (too expensive/too much power needed), but i know the good stuff is coming Q4. Time to build another 5yr build with a quad this time ^_^
    Reply
  • sublifer
    Great review. At the pricing chart I was eyeing the Kingston with the low price and decent rated timings. I was surprised to see the cheapest kit, the Super Talent, to match up with the best in timings, that'd definitely be a great buy.
    Reply
  • dragonsprayer
    Ya, check that supertalent review on newegg - oops thats me! we used that in many systems!
    if you want to pot for the extra bandwidth get muskin

    corasir gave us 10%+ more bandwidth at the same settings a supertalent - then again it was double the price
    Reply
  • avatar_raq
    Nice article..But I thought it'll include real time programs and games benchmarks. Honestly, we all know the difference netween them is so small, that's negligible.
    Reply