Inno3D GTX570 1.25GB OC Review

👤by Sahil Mannick Comments 📅17-02-11
Specifications

The GF110 chip shares a lot of its roots with the GF100 core. The GPU still packs an impressive 3.2 billion transistors in a die seize 520mm squared. Its default internal configuration has been ported from GF100 in that the GPU features 512 CUDA cores or shader processors as we are more accustomed to. There are organised in a 4x16x32 block where 16 denotes the number of stream multi-processors (SM) and 32 being the number of cores on each SM. Each SM has its own L1 Cache and a common L2 Cache is shared by all 16. The GPU is still manufactured on the 40nm process.


The GTX570 has 15 out of the total 16 SM enabled for a final 480 CUDA core count. Similarly to the GTX480, it also shares the same number of texture units, which in this case is 60. These represent 32 fewer cores than the fully unlocked GTX580 and 4 texture units less. The size of the L2 Cache is reminiscent of the GTX470 coming at 640KB rather than 768KB as found on the flagship GTX580. Directly related to Cache is the number of ROPs which has been reduced from 48 to 40 on the GTX570. On the other hand, the GTX570 has been presented with a significant clock boost over both the GTX470 and the GTX480 in core and memory clock speeds to avoid “crippled” performance. Consequently, the ROPs are also clocked higher which should minimise the gap between the GTX480 and itself. Thanks to the GF110 GPU, the GTX570 also benefits from the GF104’s superior texture filtering capabilities and further enhancements have been made to the tessellation engine for improved performance in an area where Nvidia already reigns supreme.

The memory subsystem on the GTX570 is more akin to the GTX470 with its 5 memory controllers each sporting a 256MB GDDR5 framebuffer to give 1280MB of available memory. The memory interface is composed of ten 32-bit channels for a 320-bit interface.

GTX580: 16 SMs x 32 = 512 Core, 16 SMs x 4 = 64 texture units
32-bit channel x 12 = 384-bit interface, 256MB x 6 memory controllers = 1536MB memory

GTX570: 15 SMs x 32 = 480 Core, 15 SMs x 4 = 60 texture units
32-bit channel x 10 = 320-bit interface, 256MB x 5 memory controllers = 1280MB memory


The GTX570 looks to be very competitive against the GTX480, with 4.6% better texture fill rate and shader operation. Conversely, it is let down by its memory subsystem to generate lower bandwidth than all the cards in the table and its pixel fill rate falls short of the GTX480’s by 8.7%. Compared to the mighty GTX580, the GTX570 features 12% lower texture fill rate and shader operation, and lower pixel fill rate by 26.5%. For a fraction of the cost ($500 VS $350), the GTX570 is still better value for money but it remains to be seen how real life performance stacks up.

Product Specifications

Graphics Engine: GeForce GTX570
Model: Inno3D GeForce GTX570
Bus Standard: PCI Express x16 2.0 (Compatible with 1.1)
Memory Size(MB): 1280 GDDR5
Memory Interface: 320-bit
Core Clock Speed (MHz): 800
Stream Processors: 480
Shader Clock (MHz): 1600
Memory Clock Speed (MHz): 4000

3D API: Direct X 11 & OpenGL 4.1
DVI Output: 2
HDMI: 1
VGA: Supported using DVI-to-VGA adapter
Display Output (Max Resolution): 2560 x 1600
HDCP Support: Yes
Dual Link DV1: Yes
HDMI Support: Yes
SLI/3-Way SLI support: Yes
Card Dimension (mm): 268 x 115mm

The most impressive feature of the Inno3D card is the sheer speed at which it comes overclocked at. The 9% overclock on the core is one of the highest pre-overclock available to consumers, beaten only by Point Of View’s TGT Ultra Charged Edition.


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