Overclock pentium d 820: Intel Pentium D 820 Overclock Benchmarks

So, the power consumption measurements slightly reduced the negative impression about the Pentium D 820 processor that remained after reading the results of the corresponding measurements on site Tech Report . Let me remind you that our American colleagues reported that the power consumption level of Pentium D 820 (2.8 GHz) is comparable to that of Pentium 4 670 (3.8 GHz), which is one of the most powerful single-core Intel processors.

The power consumption results of the Gavric show that the Pentium D 820 (2.8 GHz) processor can consume no more power than a single-core Pentium 4 operating at 3.4 GHz. Moreover, under load, the Pentium D 820 falls within the range equivalent to the performance of single-core processors operating at a frequency of 3.2-3.4 GHz. Thus, the lack of support for EIST technology in idle mode negatively affects the power consumption of a system based on the Pentium D 820 processor. they still can’t.

In other words, the applicability of the Pentium D 820 (2.8 GHz) processor TDP=95W has been proven. In fact, the level of power consumed by this processor fits into the vicinity of the TDP=84 W requirements applicable to all Pentium 4 processors with a frequency up to 3. 4 GHz inclusive. In practice, this can provide lower operating temperatures and acceptable noise levels, especially important in the Digital Home segment.

Overclocking a Pentium D 820 (2.8 GHz) using the otherwise effective Zalman CNPS7700-Cu cooler revealed some unpleasant features of this Smithfield model. First of all, it was possible to achieve stable operation only at a frequency of 3360 MHz. The processor was also overclocked to 3.5 GHz, but only a part of the tests were successfully completed at this frequency. Checking with multi-threaded tests at a frequency of 3.36 GHz revealed the following problem: it turns out that one of the cores can go into throttling independently of the other. Keep in mind that in the case of the Pentium D 820, it makes sense to talk about TM1 operation (clock skipping), however, older models like the Pentium D 830 (3.0 GHz) or Pentium D 840 (3.2 GHz) can behave similarly within the framework of TM2 technology , downclocking to 2.8 GHz for a single core. This is how the Smithfield processor «slips» with different «wheels» during overclocking. Eh, he should have a differential lock :)…

It turns out that the absence of such a «block» is explained quite simply. Intel desktop processors with two cores currently have only one thermal diode — it is built into the Core 0 core. The second core (Core 1) does not have a thermal diode, and therefore can go into throttling even when the first one copes well with the load. Server processors with two cores will have two thermal diodes. We hope that Presler desktop processors will correct this omission.

The final frequency of stable operation of both cores was 3220 MHz — this is only 20 MHz higher than the nominal frequency of the older Smithfield model. Therefore, for effective overclocking of these processors, it makes sense to use at least a water cooling system. By the way, a motherboard with an insufficiently strong power supply subsystem can also become a «bottleneck» in the process of overclocking younger Smithfield models, as well as a weak power supply. It turns out that Smithfield supporters thinking about overclocking will have to fork out not only for a new motherboard and memory, but also for a power supply.

recommendations

According to the test results of the Pentium D 820 processor, we can say the following: the traditional strengths such as video/audio/graphics editing and final rendering by the Smithfield core have only been further strengthened. In other cases, this processor reveals its advantages only in a multitasking environment.

Compare Intel Pentium D 820 and Intel Pentium 4 540

Intel Pentium D 820

2.8 GHz | 2 cores | LGA 775

VS

Intel Pentium 4 540

3.2 GHz | 1 core | LGA 775

benchmark

General result

Based on 6 tests:

Intel Pentium D 820 faster than 4.59%

Intel Pentium D 820

9000 9KITUM TODEMI -core)

Intel Pentium D 820 is 41.04% faster

Intel Pentium D 820

1378

Intel Pentium 4 540

Larger L2 cache (2MB vs.