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Nvidia have been selling GTX970 and GTX980 cards by the truckload since the very successful launch earlier this month. We have already reviewed a handful of GTX970 partner cards and today we supplement our findings by analysing the latest Asus GTX980 Strix OC. This card features a hefty cooling system and hybrid fan configuration to lower noise emissions as far as possible.
Regular KitGuru readers will already be aware of the new Asus Strix range of graphics cards. Kitguru has, so far, reviewed the R9 285 Strix, GTX750ti Strix and GTX970 Strix OC. The GTX980 Strix OC we review today is fitted with a modified cooler and ships in a reasonable state of overclock to further enhance gaming performance.
The Maxwell architecture has been designed to deliver twice the performance per watt of previous generation Geforce hardware. It sounds easy enough on paper to achieve, but the real world challenges for Nvidia have been complex.
| GPU | GeForce GTX 680 (Kepler) | GeForce GTX 980 (Maxwell) | Geforce GTX 970 (Maxwell) |
| Streaming Multiprocessors | 8 | 16 | 13 |
| CUDA Cores | 1536 | 2048 | 1664 |
| Base Clock | 1006 mhz | 1126 mhz | 1050 mhz |
| GPU Boost Clock | 1058 mhz | 1216 mhz | 1178 mhz |
| Total Video memory | 2GB | 4GB | 4GB |
| Texel fill-rate | 129 Gigatexels/Sec | 144.1 Gigatexels/Sec | 109.2 Gigatexels/Sec |
| Memory Clock | 6000 mhz | 7000 mhz | 7000 mhz |
| Memory Bandwidth | 192 GB/sec | 224 GB/sec | 224 GB/s |
| ROPs | 32 | 64 | 64 |
| Manufacturing Process | 28nm | 28nm | 28nm |
| TDP | 195 watts | 165 watts | 145 watts |
The new GM204 GPU is very efficient. The Maxwell SM has been rebalanced so that the CUDA cores are fully utilised more often. Doing so saves power and enhances overall performance. The L2 cache size in the GM204 is 2MB, or four times larger than the GK104. The addition of extra cache means that fewer requests to the GPU memory are needed – again reducing power consumption and pushing more performance.
The Geforce GTX 980 is equipped with 7Gbps memory. Those of you with higher resolution monitors, or running in a multi screen configuration will also be pleased to hear that there is 4GB of GDDR5 memory on the card, not 3GB – this memory will push 224 GB/s sec. Nvidia have added a new compression engine to reduce the demand on DRAM bandwidth.
The Asus GTX780 Strix OC has received a core clock enhancement to 1,178mhz, from 1,126mhz on the reference design. The GDDR5 memory remains untouched, running at 1,753mhz.
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