The State of Linux NVIDIA Overclocking
The card up now is the Leadtek PX6600GT TDH. Although no RAM heatsinks are included, a very nice stock heatsink cools the GPU. The memory equipped on the Leadtek is Samsung 507 K4J55323QF-GC20. This memory is designed for a maximum frequency of 500MHz with a speed of 2.0 ns.
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| Hardware Components | |
| Processor: | Intel Pentium 4 530 (3.0GHz) @ 3.4GHz |
| Motherboard: | DFI LANPARTY UT 915P-T12 |
| Memory: | 2 x 512MB Corsair XMS PC4400 |
| Graphics Card: | Leadtek PX6600GT TDH |
| Hard Drives: | Western Digital 160GB SATA |
| Optical Drives: | Lite-On 52x24x52 |
| Cooling: | Sytrin Nextherm ICS 8200 |
| Power Supply: | Sytrin 460W ATX12V/EPS12V |
Experiencing success with the first 6600GT, we expected similar triumph. However, this wasn't exactly the case. The NVClock overclocking window displayed 300/1000 (GPU/MEM), which is off by 200MHz on the GPU clock. Doing some research revealed other graphics cards have experienced conflicts with NVClock detecting their GPU clock at a lower speed than what was detected, by a multiple of 2 or 4. In our situation, the 300MHz was off by a factor of 1.6. Proceeding to overclock this card anyhow, we began with the memory clock but were soon doomed by the 1188MHz glitch, as we had seen in the Gigabyte 6600GT PCI-E graphics card. Keeping the memory clock at 1188MHz, we were able to increase the GPU clock to 370MHz. EDIT: It appears during this overclocking process, the Leadtek 6600GT had throttled down to a lower speed and voltage, even while running a 3D application simultaneously NVClock continued to display this lower speed rather than the full 3D speed of 500/1000.