#1 Como afecta el rendimiento las bajas latencias.
http://techreport.com/etc/2005q4/mem...y/index.x?pg=1
Conclusión personal:
Las memos grossas y de super-bajas-latencias solo son útiles para darle mucha rosca, que suban Mhz subiendo los timmings, logrando OC's grossos.
Pero para tenerlas en "stock", pagar el doble por una mejora del 8% promedio, no da.
Conclusión personal:
Las memos grossas y de super-bajas-latencias solo son útiles para darle mucha rosca, que suban Mhz subiendo los timmings, logrando OC's grossos.
Pero para tenerlas en "stock", pagar el doble por una mejora del 8% promedio, no da.
Conclusions
Although tighter memory timings and a 1T command rate can certainly improve the performance of the Athlon 64's memory subsystem, that improvement doesn't always translate to better application performance. In fact, with the exception of the Sphinx speech recognition engine, moving to tighter memory timings or a more aggressive command rate generally didn't improve performance by more than a few percentage points, if at all, in our tests. Lower latencies only improved WorldBench's overall score by a single point, and performance gains in games were generally limited to lower resolutions and detail levels.
So how much does the modest performance improvement brought by tighter memory latencies cost? Close to twice as much. As I write, a single 512MB stick of OCZ Value DDR400 memory rated at 2.5-4-4-8 sells for between $45 and $52 online, while a 512MB Platinum Rev 2 2-2-2-5 DDR400 module sells for between $81 and $94. Looking at dual-channel kits, a pair of 512MB OCZ Value DDR400 DIMMS rated for 2.5-4-4-8 timings sells for between $91 and $103 online, while a pair of 512MB Platinum Rev 2 sticks rated for 2-2-2-5 costs between $155 and $191.
OCZ isn't the only DIMM maker charging that sort of premium for ultra-low-latency modules. In fact, it's common. To cite another example, a pair of 512MB Corsair Value DDR400 DIMMs rated for 2.5-4-4-8 will set you back between $80 and $159, while a couple of the company's 512MB TWINX1024-3200XL 2-2-2-5 DDR400 modules run from $189 all the way up to $325.
For most users, the price premium associated with exotic 2-2-2-5 memory won't be worth the relatively modest performance gains that it offers. Low-latency memory does have an ace up its sleeve for overclockers, though. Most low-latency modules are capable of running at much higher clock speeds if you back off on their latencies a little. We've had our OCZ Platinum Rev 2 DIMMs, which are rated for 2-2-2-5 latencies at 400MHz, cranked all the way up to 560MHz with more relaxed 2.5-4-4-8 timings. Overclocking success is never guaranteed, of course, but low-latency memory modules tend to use higher quality chips that respond better to overclocking.
At the end of the day, the appeal of low-latency memory modules may be limited to overclockers and enthusiasts intent on squeezing every last drop of performance from a system. More pedestrian "value" memory should be plenty fast enough for everyone else, especially since you can practically afford twice as much.
Although tighter memory timings and a 1T command rate can certainly improve the performance of the Athlon 64's memory subsystem, that improvement doesn't always translate to better application performance. In fact, with the exception of the Sphinx speech recognition engine, moving to tighter memory timings or a more aggressive command rate generally didn't improve performance by more than a few percentage points, if at all, in our tests. Lower latencies only improved WorldBench's overall score by a single point, and performance gains in games were generally limited to lower resolutions and detail levels.
So how much does the modest performance improvement brought by tighter memory latencies cost? Close to twice as much. As I write, a single 512MB stick of OCZ Value DDR400 memory rated at 2.5-4-4-8 sells for between $45 and $52 online, while a 512MB Platinum Rev 2 2-2-2-5 DDR400 module sells for between $81 and $94. Looking at dual-channel kits, a pair of 512MB OCZ Value DDR400 DIMMS rated for 2.5-4-4-8 timings sells for between $91 and $103 online, while a pair of 512MB Platinum Rev 2 sticks rated for 2-2-2-5 costs between $155 and $191.
OCZ isn't the only DIMM maker charging that sort of premium for ultra-low-latency modules. In fact, it's common. To cite another example, a pair of 512MB Corsair Value DDR400 DIMMs rated for 2.5-4-4-8 will set you back between $80 and $159, while a couple of the company's 512MB TWINX1024-3200XL 2-2-2-5 DDR400 modules run from $189 all the way up to $325.
For most users, the price premium associated with exotic 2-2-2-5 memory won't be worth the relatively modest performance gains that it offers. Low-latency memory does have an ace up its sleeve for overclockers, though. Most low-latency modules are capable of running at much higher clock speeds if you back off on their latencies a little. We've had our OCZ Platinum Rev 2 DIMMs, which are rated for 2-2-2-5 latencies at 400MHz, cranked all the way up to 560MHz with more relaxed 2.5-4-4-8 timings. Overclocking success is never guaranteed, of course, but low-latency memory modules tend to use higher quality chips that respond better to overclocking.
At the end of the day, the appeal of low-latency memory modules may be limited to overclockers and enthusiasts intent on squeezing every last drop of performance from a system. More pedestrian "value" memory should be plenty fast enough for everyone else, especially since you can practically afford twice as much.
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