DDR3 Round-Up: Core i7 Performance Analysis - HotHardware

DDR3 Round-Up: Core i7 Performance Analysis

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Test System Details
Specifications and Revisions

  • Intel Core i7 920 (2.66 GHz Quad-Core, 45nm)
  • Asus P6T Intel X58 Motherboard
  • Nvidia GeForce 9600 512 MB
  • Western Digital VelociRaptor 150 GB SATA-II 10K RPM Hard Drive
  • Plextor PX-755SA DVD+/-RW Drive
  • Corsair HX620W 620W Power Supply
  • Microsoft Windows Vista Ultimate Edition (64-bit, SP1)

  • Patriot Baseline Set (1066 MHz, CAS 9-9-9-24)
  • Corsair XMS3 Dominator (1866 MHz, CAS 9-9-9-24)
  • OCZ Platinum XT (1600 MHz, CAS 7-7-7-24)
  • Kingston HyperX 1600 (1600 MHz, CAS 8-8-8-24)
  • Kingston HyperX 1800 (1800 MHZ, CAS 9-9-9-27)
Synthetic Memory Benchmarks
SiSoft Sandra 2008 SP1
 


With their stock settings enabled, the OCZ Platinum and Corsair Dominator modules give the best performance out of box. Both deliver about 26.5 GB/s of memory bandwidth with sub-60ns latencies. Our Kingston HyperX modules delivered about 24 GB/s with 60ns+ latencies. The OCZ modules tested surprisingly well here, considering they are running at a significantly lower clock speed compared to the Corsair. However, our Corsair modules have fairly high latencies by default, whereas the OCZ modules are a tight 7-7-7 which helps make up for the clock speed deficiencies.

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What a great story...thanks for the comparo! DDR3 is so much more expensive than DDR2 right now (I have read that the price difference between the two will be much closer at the end of this year), but Core i7 builders don't have a choice. If a Core i7 builder tries to save some money and only installs two sticks of memory, will it run in dual-channel or single-channel mode?

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awesome article guys. Could have used that a couple weeks ago thoughStick out tongue. I would have went with the OCZ modules more then likely. Although I have not yet messed around with the dominator 1600 set that I got. I have a feeling that if I tweak it I can probaly get some better timings out of it. Default settings on my board have it running at 1333. What did you guys use when you tested the rampage 2 board?

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Dual channel mode.  Raw bandwidth takes a hit, but real world performance impact is nil.

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Im thinking the right ddr3 and the rampage 2 boards are going to sport some very high marks and cant wait to see the numbers the the lucky guys here that alredy have access to these setups!Make you lealous and slobber!

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Glad you liked this one, gents. Chris did a good job with it for sure. It shows some interesting results actually.

For the RE 2 board, I believe Rob used some Qmonda RAM.

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Great review. I too hope that DDR3 prices go down, so I'll be able to use my Eclipse.

Well, maybe I could 'borrow' a review sample. Wink

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Dave_HH:

Glad you liked this one, gents. Chris did a good job with it for sure. It shows some interesting results actually.

For the RE 2 board, I believe Rob used some Qmonda RAM.

Qmonda RAM? Is that like an abreviation for something? I was more curious about the speeds and how he might have adjusted timings if he did any of that when it was overclocked. Seems to have locked in settings for the timings when adjusting the speed of the memory. I have't messed around with the gazillion settings yet but thought since we were on the topic of memory I would ask.

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No Nelson thats not an abbreviation actually. Qmonda is the company who actually made the actual DDR5 on ATI video cards. They also made the DDR4 on the 3870's as well I believe. So they are about the fastest ram maker in the world at least on a developmental aspect. I know other people are making DDR5 now but they had it developed and rolled out for the 4870's release which was what mid July last year.

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Don't you mean Qimonda Dave?

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Nice article,  I do have a question about your comparison of memory bandwidth testing between 1,2 and 3 channel modes.  I've noticed that the amount of ram changes with each test.  While this isn't a problem on synthetic tests that actually check the memory bandwidth it will skew real world testing as things like photoshop tend to gain performance when the ram capacity increases.

Have you guys thought of keeping the ram capacity the same in single, dual and tri channel modes?

This would give you an exact indication of whether the extra channels are giving a benefit or if the previous result was due to extra capacity.

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