Hacking RADEON 9500 to become a RADEON 9700
Guys from Overclockers.RU made some experiments with 128 MB card RADEON 9500 from Sapphire, as a result they converted it in... RADEON 9700 card!
Card on ATI RADEON 9500 have 128-bit or 256-bit bus, depending on a quantity of video memory. Since these boards are done on PCB from RADEON 9700, it equipped 64-bit half-sized versions, which have exactly half of chips, from RADEON 9700, i.e., 128 bits. Then the 128-megabaytnye boards, which have 8 chips of memory, installed exactly as on RADEON 9700, have the "valuable" 256-bit bus of memory.
For alteration it was required
- To solder one of the resistors, located on the base layer of chip RADEON 9500 of position (2-3) to position (1-2) or to install analogous, with the resistance 6,8 kOm
- flash a hack BIOS for Hercules RADEON 9700 downloaded from warp11
- try to overclock: in this case board equipped 3,6 ns memory from Infineon; therefore overclocking of memory is not strong, only to 300 MHz, but chip from 275 to 370 MHz
The results obtained upon the acceleration illustrate the following graphs (in the testing they participated: 1 board Sapphire RADEON 9500 128MB without overclocking, 2 – overclocked card, 3 – overclocked card with new BIOS, 4 RADEON 9700. Test system: Intel P4 2800 MHz, ASUS P4S8X (SiS 648), 512 Mb. DDR SDRAM PC2700, Windows XP, DirectX 9, Chatalyst 3.0. Setups quality in Quake3 Arena maximum, in UT2003 Testure detail: highest, World detail: highest, Charachter detail: highest, Physics detail: normal, Character Of shadows: on, Dynamic Lighting: on, Detail Textures: on, Projectors: on, Decals: on, Coronas: on, Decal Stay: normal, Foliage: on, Trilinear Filtering: on).
Result: the altered and overclocked RADEON 9500 card outdistanced RADEON 9700! All details about this experiments are placed here.
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