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NVIDIA GT300 'Fermi' Specifications Detailed

Category: Video Cards
Posted: September 30, 2009 03:48PM
Author: premiumgfx

As most of you already know, the GT300 was first unveiled months ago along with some preliminary specifications. Today we get the bigger picture, thanks to bsn. NVIDIA's current next-gen GPU is known as the GT300 or N70. It is now known that the GPU architecture is called "Fermi" by NVIDIA engineers. A quick history lesson: the man behind the name is an Italian physicist, Enrico Fermi who is known for helping develop the first nuclear reactor. This may be why the GT300 board is also known as "reactor". Now, to the important details.

GT300 "Fermi" Architecture GPU Specifications

  • 3.0 billion transistors
  • 40nm GPU by TSMC
  • 384-bit memory interface (6x64-bit memory controllers)
  • 512 shader cores (renamed to CUDA Cores)
  • 32 CUDA cores per shader cluster
  • 1MB L1 cache memory [divided into 16KB Cache - Shared Memory]
  • 768KB L2 unified cache memory
  • Up to 6GB GDDR5 memory (1.5GB for GeForce and up to 6GB for Quadro/Tesla)
  • Half Speed IEEE 754 Double Precision
  • 16 Streaming Multiprocessors (new name for the former Shader Cluster) containing 32 cores each

The Fermi architecture also supports C (CUDA), C++, DirectCompute, Fortran, OpenCL, OpenGL 3.1 and OpenGL 3.2. This means that for the first time in history a GPU can run C++ code! NVIDIA's "Fermi" architecture will be released in three tiers, GeForce for high-end consumers, Quadro for commersial use and Tesla for scientific purposes. There is still no word on pricing or availablility, but I'd expect the new Fermi cards to break the bank a bit.

These revelations are huge for NVIDIA and the enthusiast community, now we need to see one in action!



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nickosha on September 30, 2009 03:50PM
I hope it's still on track to release this year. I can't even begin to imagine what the price might be though.
tkrow21 on September 30, 2009 03:55PM
O.O
XxHellxRaizerxX on September 30, 2009 06:56PM
Finally something original o.O I'm actually impressed. And Cache on a GPU? Looks like they paid attention to the Xbox 360 and Gamecube.
Zertz on September 30, 2009 07:29PM
There always was cache on GPUs just like on CPUs, it's just not widely documented. Without cache, accessing data would be extremely slow.
Waco on October 1, 2009 12:46AM
Not an L2 cache there wasn't... They've included one because they've switched from SIMD to MIMD which should increase efficiency by a huge amount but requires faster access to data/instructions (and more of both).
XxHellxRaizerxX on September 30, 2009 07:55PM
Oh, guess that makes sense just thought the GPU was fine with the higher bandwidth of it's memory data path. But since they are listing it is this a jump from the normal amount placed in a GPU?
_TheAlexO on September 30, 2009 08:22PM
Ive always wondered that as well. They have never listed Cache i just assumed it didnt need it
Zertz on September 30, 2009 09:09PM
It's a bump from GT200, that's for sure. ATI doesn't release those details, but judging strictly by transistor count, the NVIDIA cards probably have more cache. The big features I'm seeing there are mostly oriented towards computing. "Half Speed IEEE 754 Double Precision", ATI does double precision at 1/5 the speed of single, so NVIDIA's 1/2 speed is a huge step. Support for C++ is also a huge step for GPGPU computing.
Zertz on September 30, 2009 09:13PM
We are still months from a GT300 launch though, so while GT300 will almost certainly be faster than RV870, ATI (for the first time since... Radeon 9xxx?) got a lengthy head start.
Guest comment
Yogie P. on October 1, 2009 01:01AM
This is a revenge from N Vidia.
Guest comment
Ersan on October 14, 2009 03:20PM
this card is going to own the ati card by far...6gb GDDR5 at 384bit the 3gb and the 1.5gb versions will be higher bit so id reckon 3gb would be 512bit and 1.5 would be 1gbit 3BILLION transistors lmoa L::D:DD:

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