About 2 years ago, EDO was the winner in the memory war. Fast Pages Mode-Dynamic RAM (FPM DRAM), the previous standard, was too slow to hold out against Extended Data Out Dynamic RAM (EDO Dram). There was a speed difference of at least 10 percent. Even at the time however, you could see SDRAM (Synchronous DRAM) as something that is now being pushed as the successor to EDO itself. At that point of time Socket 7 chip set was not optimized for SDRAM nor it was confirmed whether a higher board speed, as promised by the manufactures could make a better use of the power of SDRAM.
SDRAM and EDO-DRAM
EDO-DRAM is Socket-7 range, in the mean time, has pushed out the conventional FPM-DRAM from the market and the reason is not just because the price ratio have been revised. Now even the price difference between SDRAM and EDO-DRAM has been drastically reduced or almost removed. Additionally improved chip sets that permit higher board speed of 75 and 83 Mhz, in place of the 66 Mhz that was used till now.
When a test was conducted using a motherboard of A-trend with Ali-Aladin 4+ chip set, which can work both the RAM types and the three system speed types, in commotion with an AMD K6/266.
Evaluating the results, it must be considered that the processor does not deliver the same internal clock frequency in case of all system speeds. In case of 66 Mhz bus frequency, a complete 266 Mhz (100 percent) is achieved, in case of 75 MHz (114 percent) only 262 Mhz (98 percent) and in case of 83 Mhz (126 percent) only 250 Mhz (94 percent).
EDO-DRAM with 66 Mhz is 5 percent slower throughput than SDRAM. The Calculation intensive jobs in the Creativity are are affected mildly (2 percent), the memory-intensive actions in productivity and entertainment sector maximum (7 percent each).
Conclusion
It is in the low level measurement that the difference between EDO- and SDRAM becomes clear. EDO is clearly much slower than SDRAM. At 66 Mhz bus speed EDO is 23 percent slower than SDRAM. With a bus frequency of 75 Mhz the proportion remains more or less the same, while 83 Mhz EDO-DRAM drops due to lack of system capacity. In case you buy EDO-DRAM approximately at the present rates, not only will you get a less profitable system, you will also get slower technology and that too with 66 Mhz systems.
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