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|Release date||April 12, 2010|
|Codename(s)||GF100 / GF104 / GF106 / GF108 / GF114 (Fermi)|
|260M 40 nm (GT218)
|Entry-level cards||GT 430|
|Mid-range cards||GT 440, GTS 450, GTX 460, GTX 465|
|High-end cards||GTX 470, GTX 480|
|Direct3D support||Direct3D 11.0
Shader Model 5.0
|OpenCL support||OpenCL 1.1|
|OpenGL support||OpenGL 4.3|
|Predecessor||GeForce 200 Series|
|Successor||GeForce 500 Series|
The GeForce 400 Series is the 11th generation of Nvidia's GeForce graphics processing units, which serves as the introduction for the Fermi architecture (GF-codenamed chips), named after the Italian physicist Enrico Fermi. The series was originally slated for production in November 2009, but, after a number of delays, launched on March 26, 2010 with availability following in April 2010.
Nvidia claims that the Fermi architecture is the next major step in its line of GPUs following the G80. The GF100, the first Fermi-architecture product, is large: 512 stream processors, in sixteen groups of 32, and 3.0 billion transistors, manufactured by TSMC in a 40 nm process. It is Nvidia's first chip to support OpenGL 4.0 and Direct3D 11. At launch, no product was available with all the stream processors active: the GTX 480 has one group disabled, the GTX 470 has two groups and one memory controller disabled, and the GTX 465 has five groups and two memory controllers disabled. Consumer GeForce cards come with 256MB attached to each of the enabled GDDR5 memory controllers, for a total of 1.5, 1.25 or 1.0GB; the Tesla C2050 has 512MB on each of six controllers, and the Tesla C2070 has 1024MB per controller. Both the Tesla cards have fourteen active groups of stream processors.
In the more expensive "Tesla" configurations, the chip features optional ECC protection on the memory, and can perform one double-precision floating-point operation per cycle per core; the consumer GeForce cards are artificially driver restricted to one DP operation per four cycles. With these features, combined with support for Visual Studio and C++, Nvidia hopes to appeal to the High-Performance Computer users who might presently be using Tesla systems.
Current limitations and trade-offs 
The quantity of on-board SRAM per ALU actually decreased proportionally compared to the previous G200 generation, despite the increase of the L2 cache from 256kB per 240 ALUs to 768kB per 512 ALUs, since Fermi has only 32768 registers per 32 ALUs (vs. 16384 per 8 ALUs), only 48kB of shared memory per 32 ALUs (vs. 16kB per 8 ALUs), and only 16kB of cache per 32 ALUs (vs. 8kB constant cache per 8 ALUs + 24kB texture cache per 24 ALUs). Parameters such as the number of registers can be found in the CUDA Compute Capability Comparison Table in the reference manual.
On 30 September 2009, Nvidia released a white paper describing the architecture: the chip features 16 'Streaming Multiprocessors' each with 32 'CUDA Cores' capable of one single-precision operation per cycle or one double-precision operation every other cycle, a 40-bit virtual address space which allows the host's memory to be mapped into the chip's address space, meaning that there is only one kind of pointer and making C++ support significantly easier, and a 384-bit wide GDDR5 memory interface. As with the G80 and GT200, threads are scheduled in 'warps', sets of 32 threads each running on a single shader core. While the GT200 had 16 KB 'shared memory' associated with each shader cluster, and required data to be read through the texturing units if a cache was needed, GF100 has 64 KB of memory associated with each cluster, which can be used either as a 48 KB cache plus 16 KB of shared memory, or as a 16 KB cache plus 48 KB of shared memory, along with a 768 KB L2 cache shared by all 16 clusters.
The white paper describes the chip much more as a general purpose processor for workloads encompassing tens of thousands of threads - reminiscent of the Tera MTA architecture, though without that machine's support for very efficient random memory access - than as a graphics processor.
- 1 SPs - Shader Processors - Unified Shaders (Vertex shader / Geometry shader / Pixel shader) : TMUs - Texture mapping units : Render Output unit
- 2 Each Streaming Multiprocessor(SM) in the GPU of GF100 architecture contains 32 SPs and 4 SFUs. Each Streaming Multiprocessor(SM) in the GPU of GF104/106/108 architecture contains 48 SPs and 8 SFUs. Each SP can fulfil one single precision fused multiply–add (FMA) operation per cycle. Each SFU can fulfil four SF operations per cycle. One FMA operation counts for two floating point operations. So the theoretical single precision peak performance, with shader count [n] and shader frequency [f, GHz], can be estimated by the following, FLOPSsp ≈ f × n × 2 (FMA). Total Processing Power: for GF100 FLOPSsp ≈ f × m ×(32 SPs × 2(FMA) + 4 × 4 SFUs) and for GF104/106/108 FLOPSsp ≈ f × m × (48 SPs × 2(FMA) + 4 × 8 SFUs) or for GF100 FLOPSsp ≈ f × n × 2.5 and for GF104/106/108 FLOPSsp ≈ f × n × 8 / 3.
SP - Shader Processor (Unified Shader, CUDA Core), SFU - Special Function Unit, SM - Streaming Multiprocessor.
- 3 Each SM in the GF100 contains 4 texture filtering units for every texture address unit. The complete GF100 die contains 64 texture address units and 256 texture filtering units Each SM in the GF104/106/108 architecture contains 8 texture filtering units for every texture address unit. The complete GF104 die contains 64 texture address units and 512 texture filtering units, the complete GF106 die contains 32 texture address units and 256 texture filtering units and the complete GF108 die contains 16 texture address units and 128 texture filtering units.
All products are produced on a 40nm fabrication process. All products support Direct X 11, OpenGL 4.3 and OpenCL 1.1.
|Model||Launch||Code name||Transistors (million)||Die size (mm2)||Bus interface||Memory (MB)||SM count||Config core 1,3||Clock rate||Fillrate||Memory configuration||GFLOPS (FMA)2||TDP (watts)||Release price (USD)|
|Core (MHz)||Shader (MHz)||Memory (MHz)||Pixel (GP/s)||Texture (GT/s)||Bandwidth (GB/s)||DRAM type||Bus width (bit)|
|GeForce 405 (OEM)||September 16, 2011||?||?||?||PCIe 2.0 x16||512
|GeForce GT 420 (OEM)||September 3, 2010||GF108||585||116||PCIe 2.0 x16||2048||1||48:8:4||700||1400||1800||2.8||5.6||28.8||GDDR3||128||134.4||50||OEM|
|GeForce GT 430 (OEM)||October 11, 2010||GF108||585||116||PCIe 2.0 x16||2048||2||96:16:4||700||1400||1600
|GeForce GT 430||October 11, 2010||GF108||585||116||PCIe 2.0 x16||1024||2||96:16:4||700||1400||1800||2.8||11.2||28.8||GDDR3||128||268.8||49||$79|
|GeForce GT 440||February 1, 2011||GF108||585||116||PCIe 2.0 x16||512
|GeForce GT 440 (OEM)||October 11, 2010||GF106||1170||238||PCIe 2.0 x16||1536
|GeForce GTS 450 (OEM)||October 11, 2010||GF106||1170||238||PCIe 2.0 x16||1536||3||144:24:24||790||1580||1804||18.96||18.96||86||GDDR5||192||455||106||OEM|
|GeForce GTS 450||September 13, 2010||GF106||1170||238||PCIe 2.0 x16||512
|GeForce GTX 460 SE||November 15, 2010||GF104||1950||332||PCIe 2.0 x16||1024||6||288:48:32||650||1300||3400||20.8||31.2||108.8||GDDR5||256||748.8||150||$160?-$180?|
|GeForce GTX 460 (OEM)||October 11, 2010||GF104||1950||332||PCIe 2.0 x16||1024||7||336:56:32||650||1300||3400||20.8||36.4||108.8||GDDR5||256||873.6||150||OEM|
|GeForce GTX 460||July 12, 2010||GF104||1950||332||PCIe 2.0 x16||768||7||336:56:24||675||1350||3600||16.2||37.8||86.4||GDDR5||192||907.2||150||$199|
|GeForce GTX 460 v2||September 24, 2011||GF114||1950||332||PCIe 2.0 x16||1024||7||336:56:24||778||1556||4008||18.67||43.57||96.2||GDDR5||192||1045.6||160||$199|
|GeForce GTX 465||May 31, 2010||GF100||3200||529||PCIe 2.0 x16||1024||11||352:44:32||607||1215||3206||19.42||26.71||102.6||GDDR5||256||855.4||200||$279|
|GeForce GTX 470||March 26, 2010||GF100||3200||529||PCIe 2.0 x16||1280||14||448:56:40||607||1215||3348||24.28||34||133.9||GDDR5||320||1088.6||215||$349|
|GeForce GTX 480||March 26, 2010||GF100||3200||529||PCIe 2.0 x16||1536||15||480:60:48||700||1401||3696||33.60||42||177.4||GDDR5||384||1345||250||$499|
As of November 8, 2010, Nvidia released the GF110 chip, along with the GTX580 (480's replacement). It is a redesigned GF100 chip, which uses significantly less power. This allows Nvidia to enable all 16 SMs (all 16 cores), which was previously impossible on the GF100 "NVIDIA GeForce GTX 580". Various features of the GF100 architecture are only available on the more expensive Quadro and Tesla series of cards. For the GeForce consumer products, double precision performance is a quarter of that of the "full" Fermi architecture. Error checking and correcting memory (ECC) also does not operate on consumer cards. The GF100 cards provide Compute Capability 2.0, while the GF104/106/108 cards provide Compute Capability 2.1.
Chipset table 
See also 
- GeForce 200 Series
- GeForce 500 Series
- GeForce 600 Series
- GeForce 700 Series
- GeForce 800 Series
- GeForce 900 Series
- Nvidia Quadro
- Nvidia Tesla
- David Kanter (September 30, 2009). "Inside Fermi: Nvidia's HPC Push". realworldtech.com. Retrieved December 16, 2010.
- "OFFICIAL: NVIDIA says GT300 on schedule for Q4 2009, yields are fine - Bright Side Of News*". Brightsideofnews.com. Retrieved 2010-09-20.
- "Next Generation CUDA Architecture, Code Named Fermi". Nvidia.com. Retrieved 2010-09-20.
- Compute Capability Comparison Table in "Page 147-148, Appendix G.1, CUDA 3.1 official reference manual".. Page 97 in Appendix A lists the older NVIDIA GPUs and shows all G200 series to be compute capability 1.3, while Fermi-based cards have compute capability 2.x (page 14, Section 2.5).
- siliconmadness.com (2010). "Nvidia Announces Tesla 20 Series".
- NVIDIA's GeForce GTX 480 and GTX 470: 6 Months Late, Was It Worth the Wait?
- NVIDIA’s GeForce GTX 460: The $200 King
- "Statement by NVIDIA on their General CUDA GPU Computing Discussion forum".
- "NVIDIA Tesla C2xxx webpage"., note from the description one may infer that on Teslas, ECC may be switched on and off using 1/8 of existing on-board memory, unlike standard ECC memory modules which requires 1/8 extra memory chips (that is, one extra chip to be mounted on the printed circuit board for every 8).
|Wikimedia Commons has media related to: GeForce 400 series|
- The Next Generation of Nvidia GeForce
- Fermi architecture
- GTX 400 Overview
- GeForce GTX 480
- GeForce GTX 470
- GeForce GTX 465
- GeForce GTX 460
- GeForce GTS 450
- GeForce GT 440
- GeForce GT 430
- GeForce GTX 485M
- GeForce GTX 480M
- GeForce GTX 470M
- GeForce GTX 460M
- GeForce GT 445M
- GeForce GT 435M
- GeForce GT 425M
- GeForce GT 420M
- GeForce GT 415M
- GeForce 410M
- GeForce 405
- Nvidia Nsight