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NVIDIA GeForce 8600, 8500 and 8300 details

Posted on Thursday, April 12 2007 @ 16:39:12 CEST by

The Inq published all the details of the upcoming GeForce 8600, 8500 and 8300 GPUs from NVIDIA:
G84-400/403/405 a.k.a. GeForce 8600GTS comes at a default clock of 675MHz for the GPU and 1GHz DDR (2GHz) for GDDR-3 memory. The GPU consists of 289 million transistors, putting it right in G71, or 7900 territory. These 289 million transistors are spent on 32 Scalar Shader units clocked at 1.45GHz each. Power draw with default clock should not exceed 71 Watts, but theoretical headroom is 125-150W (45-75W from PCIe slot, 75W from 6-pin PCIe power connector), hence the overclocking competition between the companies.

G84-300/303/305 a.k.a. GeForce 8600GT comes with a near-identical GPU, but the clock is different. Thirty-two Scalar Shader units work at 1.18GHz, while the rest of the GPU works at 500/550/600 MHz. Video memory is GDDR-3 and it will be clocked at 700MHz DDR, (1.4 GHz). Power consumption is 43 Watts, only three Watts more than 8500GT (but overclocking is limited by the stable power your motherboard can provide).

G86-300/303/305 a.k.a. GeForce 8500GT is basically half a G84 chip. This el’cheapola packs only 16 Scalar Shaders in 210 million trannies, which does not bode well for performance in shader-intensive applications. The market will decide is this enough. Shader units are clocked at 900MHz, while the rest of the chip is set to work at either 450, 500 or even 600MHz, with this last being the most used option. Video memory is your typical DDR2 system memory, regular PC2-6400 (DDR2-800) memory chips.

G86-303/305 a.k.a. GeForce 8300GTis the only product not launching on April 17th. This product is set for introduction after AMD launches its R(V)630 chip, and it is the same chip as one on the 8500GT board. So the GeForce 8300 will pack 16 Scalar shaders as well (unless nV disables them in drivers, but hardware-wise we are talking about the same chip). But, this chip will be placed on 7300 PCBs, meaning we have a case of castration. Yes, the 8300GT and GS will feature a 64-bit memory interface, so you can guess what the performance will be. This baby is packed with either 128MB or 256MB of DDR2 memory, again PC2-6400 or something slower. Power envelope is around 35W, but this depends on the final clock. Nvidia did not set the clock yet, because it awaits performance results from AMD’s own chips.


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by Anonymous on Thursday, April 12 2007 @ 21:18:57 CEST


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