What is described here may cause your computer to crash. Everything that is done is done at your own risk! Anyone interested can send us your original Doc file with photos. This article is devoted to overclocking video cards. Specifically graphics card Sapphire Radeon HD 3650 512MB DDR2 AGP.
It works in conjunction with the processor from AMD Sempron 2800+ Processor, let’s say not new.
Operates at a frequency of 1.6 GHz.
In consequence of which he had little to podrzavati bus through the BIOS. The benefit of BIOS Mat Board allows it. The bus frequency was set at 220MHz instead of the standard 200MHz. The CPU frequency was increased from 1.6 GHz to 1.75 GHz. The result is not the best, but it is almost the maximum that can this percent.
Tried to raise the bus frequency higher but the system just does not run, it stopped at 220 MHz.
I want to note that for legacy systems to take a more powerful video card does not make sense, as the processor will not be able to load to full capacity. Before I started overclocking the video card, I decided to “tune”it a bit. Since sapphire graphics cards often do not cool memory chips, it was decided to make passive cooling for them.
The cooling system is attached to the Board of the video card with four screws. Unscrew the screws, remove the system. By the way after you have removed the cooling system with the GPU suggest to rewrite the data from the chip and the memory chips. This will help you later accurately recognize the GPU and memory type that are installed on your graphics card.
Sometimes it happens that manufacturers are deceiving, indicating the technical data of the device. I had a Sapphire Radeon 9600 Pro card. So when removing the radiator from the processor chip, I found that the Board has a mobile version of Radeon 9600 with all the ensuing consequences.
Now it is necessary to make cooling radiators for memory chips.. All memory chips 8 pieces, but 2 of the chip are under standard cooling system. We won’t touch them.. Total we need 6 radiators to cool the memory.
For the manufacture of radiators I used a passive cooling heatsink from an old graphics card ASUS GeForce 2 MX. It is as impossible to reason suitable for our purposes. If you are not able to find anything similar at home like on the computer flea markets. I’m sure you’ll find a suitable radiator there.
Next, measure the size of memory chips and produce radiators for them.
Next, install the resulting radiators on the memory chips, pre-smearing them with thermal paste on the surface contact planes. In principle it is possible to use thermal glue or thermal tape. I used Russian thermal transfer paste KPT-8. For the best contact of radiators with memory chips I made fasteners from office paper clips. Next, install in place the standard cooling system, pre-smeared with a thermal chip GPU.
This operation was carried out in order to remove heat from the memory chips, as we will increase not only the frequency of the processor of the graphics card, but also the memory frequency. I did not bad.
Now let’s move on to overclocking. I used the RivaTuner program to disperse the video card. This program allows you to manipulate the frequencies of GPU and memory at a low level, ie bypassing restrictions set by video card drivers. To increase GPU/memory frequencies, set RivaNuner to start. In the properties of the target adapter, select the tab “low-level system settings”.
The settings tab opens, where you can control the frequency of video components. By default, I have installed the GPU frequency of 725 MHz, memory clock – 323(646) MHz. Set the GPU frequency and memory within the recommended limits (indicated in blue). To set the frequency higher than recommended is not advised. You can burn down either GPU or memory.
Generally it is best to raise the frequency step by step with a step of 10-20 MHz, after each step checking the system for stability. To check stability you can for example use the program OCCTGPU or Video Card Stability Test. They are well loaded vidyahu. During testing, monitor the temperature of the processor using the same RivaTuner.
If artifacts appear on the screen during testing, reduce the memory frequency. If the system crashes into the blue screen, reboot and reduce the video processor frequency. When testing, monitor the temperature of the graphics card. Above 85 degrees to raise it is not worth it. As a result of all the above actions, I raised the processor frequency to 850 MHz, memory frequency to 405 MHz.
The system is stable. If the system temperature varies between 65-66 degrees.
After 30 min. OCCTGPU test temperature was established to be about 85 degrees
After setting the optimal frequencies in the settings of RivaTuner put a tick against the function “load settings from Windows”. Click “apply” for that approx. Congratulations!! You’re overclocking the graphics card!! What about performance tests? There is a certain increase. In some applications it reaches 20%. And this is about 10 fps in games. Not the best result, but you will agree the result is the more to squeeze more out of this video card is problematic..