Goolgajuci sam dosao do ovog zanimljivog linka koji se bavi testiranjem memorija na novim Ivy bridge baziranim platformama.
http://www.xbitlabs.com/articles/memory/display/ivy-bridge-ddr3_2.html
Koga mrzi da cita i gleda sve grafikone i parametre testiranja copy paste cu bitan deo.
The diagrams illustrate what we’ve written above. Increasing the memory clock rate by 266 MHz turns out to be more effective than lowering each timing by 3 or 4 cycles. DDR3-1867 with 9-9-9-27 timings turns out to have a better effective latency than DDR3-1600 with aggressive timings of 7-7-7-21. As for effective bandwidth, DDR3-1600 can’t match the higher-clocked alternative under any circumstances.
Thus, memory timings have indeed become a rather insignificant parameter for today’s computers. When choosing DDR3 SDRAM for an Ivy Bridge processor, you should consider its clock rate in the first place whereas a low CAS Latency and other timings are in fact unimportant. The same goes for tweaking and overclocking: you should first focus on increasing the clock rate of your DDR3 SDRAM and only then minimize its latencies if you want to.
Conclusion
Our investigation of the correlation between the performance of Ivy Bridge platforms and their memory subsystem parameters suggests a lack of significant differences from Intel’s earlier platforms. The Ivy Bridge memory controller is largely the same as the Sandy Bridge one and delivers similar performance at the same settings. So, the influence of system memory settings on practical tasks is rather low. However, the new CPUs have brought about certain changes, the most important of which is the opportunity to choose a very high clock rate for DDR3 SDRAM. Such clock rates were not possible even with overclocker-targeted systems of the previous generation. As a result, the range of DDR3 SDRAM offered for LGA1155 systems has been extended, increasing the gap between configurations with slow and fast memory. By changing the memory clock rate alone, you can see a performance boost of 5-10% while applications that need large amounts of data (such as games) may get up to 20-30% faster! So, choosing the right kind of memory for you LGA1155 platform is important. We must note, however, that such benefits can only be achieved after a twofold increase in clock rate whereas a single 266MHz step up leads to a mere 2-3% increase in speed.
So, the rational approach to choosing system memory is in looking for the optimal frequency/price ratio. Modules up to DDR3-2133 SDRAM may be recommended for Ivy Bridge platforms, but not faster ones. Up to that frequency, the price remains reasonable while the performance in everyday applications grows up. Faster memory modules are considerably more expensive without providing tangible performance benefits, so they can only be recommended for enthusiasts who want maximum speed no matter what.
You shouldn’t bother about memory with low latencies, by the way. There are fewer such products on the market nowadays because low timings do not offer much in terms of performance on the modern LGA1155 platform.
http://www.xbitlabs.com/articles/memory/display/ivy-bridge-ddr3_2.html
Koga mrzi da cita i gleda sve grafikone i parametre testiranja copy paste cu bitan deo.
The diagrams illustrate what we’ve written above. Increasing the memory clock rate by 266 MHz turns out to be more effective than lowering each timing by 3 or 4 cycles. DDR3-1867 with 9-9-9-27 timings turns out to have a better effective latency than DDR3-1600 with aggressive timings of 7-7-7-21. As for effective bandwidth, DDR3-1600 can’t match the higher-clocked alternative under any circumstances.
Thus, memory timings have indeed become a rather insignificant parameter for today’s computers. When choosing DDR3 SDRAM for an Ivy Bridge processor, you should consider its clock rate in the first place whereas a low CAS Latency and other timings are in fact unimportant. The same goes for tweaking and overclocking: you should first focus on increasing the clock rate of your DDR3 SDRAM and only then minimize its latencies if you want to.
Conclusion
Our investigation of the correlation between the performance of Ivy Bridge platforms and their memory subsystem parameters suggests a lack of significant differences from Intel’s earlier platforms. The Ivy Bridge memory controller is largely the same as the Sandy Bridge one and delivers similar performance at the same settings. So, the influence of system memory settings on practical tasks is rather low. However, the new CPUs have brought about certain changes, the most important of which is the opportunity to choose a very high clock rate for DDR3 SDRAM. Such clock rates were not possible even with overclocker-targeted systems of the previous generation. As a result, the range of DDR3 SDRAM offered for LGA1155 systems has been extended, increasing the gap between configurations with slow and fast memory. By changing the memory clock rate alone, you can see a performance boost of 5-10% while applications that need large amounts of data (such as games) may get up to 20-30% faster! So, choosing the right kind of memory for you LGA1155 platform is important. We must note, however, that such benefits can only be achieved after a twofold increase in clock rate whereas a single 266MHz step up leads to a mere 2-3% increase in speed.
So, the rational approach to choosing system memory is in looking for the optimal frequency/price ratio. Modules up to DDR3-2133 SDRAM may be recommended for Ivy Bridge platforms, but not faster ones. Up to that frequency, the price remains reasonable while the performance in everyday applications grows up. Faster memory modules are considerably more expensive without providing tangible performance benefits, so they can only be recommended for enthusiasts who want maximum speed no matter what.
You shouldn’t bother about memory with low latencies, by the way. There are fewer such products on the market nowadays because low timings do not offer much in terms of performance on the modern LGA1155 platform.
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