Super Talent vs. Team Group: Competing at high speeds
Like the computer industry as a whole, the memory industry also does not keep up with its memory and constantly increases memory speed. With the launch of P35 chipset Of Intel about ten months ago - which first offered support for DDR3 memories - DDR3 memories at 1066MHz were first introduced. It later emerged that most models also supported the next 1333MHz speed step and shortly thereafter memories that officially supported 1600MHz speeds were already on display.
The DDR3 memories were characterized by their launch at times higher than we had been accustomed to in the past. 9-9-9-25 timings were not unusual and caused an eyebrow lift among many who were accustomed to tight timings such as 2-2-2 in DDR memories at 400MHz or 4-4-4 in DDR2 at 800MHz. But as has been said, industry is constantly improving and the timing of 7-7-7 is already a fairly common sight for fast DDR3 memories.
Despite the relatively high timing of the DDR3 memory, resulting from their modus operandi Which has been extensively explained in the past, It is important to understand that due to higher than DDR2 workloads, the DDR3 memory is higher than that of DDR2 memory, although the latency may be longer.
Keep in mind that the numbers specified for the different timelines indicate clock cycles and therefore with the increase in the working frequency of the memory, the time for each clock cycle is shorter. If for 2MHz DDR800 (base frequency of 400MHz) the duration of each cycle is 2.5 nanoseconds, the DDR3 cycle duration of 1600MHz is only 1.25 nanoseconds, about half of the time. Therefore, in the same conditions mentioned above, 8-8-8 schedules for DDR3 are exactly equivalent to 4-4-4 times for DDR2. This should make it clear that the high frequencies typical of DDR3 memories are not necessarily a disadvantage compared to DDR2 memories.
To illustrate the timing issue, you can see in the following table the length of the delay for several common memory speeds. Memory speed is indicated in three different ways for convenience. The table shows the length of time in nanoseconds for the usual CAS delays, although it is also true for the other timings since they are all specified in a number of clock cycles. If we follow for example the cells in the table marked with pink, it seems that timing of CAS4 in DDR-800 memory equivalent to 10 nanoseconds is identical to the timing of the CAS10 in DDR-2000 memory, which will also result in a delay of 10 nanoseconds.
To understand how these values are reached, take the example CAS4 for DDR-800. This is a DDR2 memory running at 800MHz speed. The base frequency of the memory is 400MHz. Each clock cycle at this speed takes 2.5 nanoseconds and therefore 4 clock cycles will attract 10 nanoseconds.
The memory manufacturers purchase the memory chips themselves from companies that specialize in chip production. They produce a printed circuit board (PCB) according to their knowledge and experience and combine the chips into a finished product with certain characteristics embedded in the SPD chip. For DDR3 memories there is also an extended profile in addition to the SPD called XMP (Extreme Memory Profile) which is actually a technology developed by Intel. This is the place to note that NVIDIA Was the first to offer an extended memory profile called EPP (Enhanced Performance Profiles) supported by chipsets of NVIDIA Only, but the X48 chip set of Intel Can only support the XMP profile.
Micron, which specializes in the production of memory chips, is responsible for a chip called Z9 originally designed for the 1066MHz frequency, but it enabled the DDR3 memory at 1600MHz frequencies to become reality. The D3 series DDR9 chip was introduced, enabling even higher working speeds, and the two memory models are based on our review.
Although memory prices are constantly declining, the prices of DDR3 memory are still significantly higher than DDR2 memory costs and buying a DDR3 board significantly increases the cost of the entire system. The advantages of the DDR3 memory, besides their high speed, are the ability to compress more memory on each memory module and their ability to work at lower voltages of 1.5 volts only (compared to 1.8 volts to DDR2). The ability to work at low voltage can be advantageous to lower heat emission, but keep in mind that the memories will work at low voltage only at low speeds (relative to DDR3) and in most cases when they are used for the purposes of the speed, the actual voltages will be much higher.
In this review, we will examine two DDR3 memories, one made by 1600MHz Team Group, and the other one by SuperNalent 1800MHz. We know that X48's chipset Intel The 1600MHz supports the 38MHz bass, but the X35 and PXNUMX can also support such a frequency band (although speeds are needed to achieve these speeds). The fast And are even aiming at this market in their branding.