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DX11 performance as compared to Radeon 5800 series  (Source: NVIDIA)

Exceptional DX11 scaling  (Source: NVIDIA)

Clearly visible are the Dual-DVI and mini-HDMI interfaces
Beats ATI soundly, but will you be able to buy it?

It was almost exactly six months ago that ATI, the graphics arm of AMD, launched the first ever DirectX 11 video card. They've since launched a top-to-bottom lineup of discrete graphics cards, ranging from the Radeon HD 5970, the most powerful graphics card in the world, to the passively cooled Radeon HD 5450 available for less than $50.

Meanwhile its chief competitor NVIDIA has been struggling to prepare its first DX11 part. The company previewed its Fermi architecture in October, but details have been few as the manufacturing problems and yield issues at the Taiwan Semiconductor Manufacturing Company still plague NVIDIA's 40nm process.

The first Graphics Fermi 100 (GF100) chips started production in January, but it wasn't until February that we learned that they would be sold under the GeForce GTX 480 and GeForce GTX 470 monikers. Some specifications finally showed up last week, and today we have the final details confirmed.

The die size of the GF100 chip is massive, measuring 23mm x 23mm for a total of 529 square millimeters. By comparison, the Cypress chips used in the Radeon 5800 and 5900 series cards come in at a more moderate 334mm², making the GF100 almost 60% larger.

However, performance is much stronger, with the GTX 480 and GTX 470 beating the Radeon HD 5870 and 5850 respectively, according to internal benchmarks shown to us by NVIDIA. The tessellation engine in particular is exceptional strong, and the near-linear scaling bodes well for those enthusiasts considering a GF100 SLI setup.

The powerhouse chip consumes an extraordinary amount of power. NVIDIA recommends the use of a 600W power supply with the GTX 480, but that is just a minimum. Enthusiasts who want to prepare for a possible SLI setup should have a 1000W PSU at the minimum, with a 1200W PSU not out of the question.

The most disappointing news is that after all of this waiting, NVIDIA has told DailyTech that readers should not expect volume availability until the week of April 12. There are supposed to be "tens of thousands" of GF100 cards at launch, but production is slow since all of the cards that will be sold during the launch are reference boards built by NVIDIA.

Somewhat surprising is the lack of support for DisplayPort, the next-generation computer display standard set to replace VGA and DVI for desktops and laptops. NVIDIA states that the GF100 supports DisplayPort, but it will be up to its board partners to support it in their own designs.

Instead, the reference design has two Dual-link DVI ports and an almost useless mini-HDMI port. NVIDIA is keen to tout its three interfaces and support for its 3D Vision Surround technology, but users who wish to use more than two monitors at the same time will be required to use a second card. This contrasts strongly with ATI's Eyefinity technology present on all 5000 series cards, which support the use of three monitors at the same time using a single video card.

Ther is no word yet on support for OpenGL 4.0 or OpenGL 3.30.



Graphics Card


GeForce GTX 470


 GeForce GTX 480

Graphics Processing Clusters

4

4

Streaming Multiprocessors

14

15

CUDA Cores

448

480

Texture Units

56

60

ROP Units

40

48

Graphics Clock
(Fixed Function Units)

607 MHz

700 MHz

Processor Clock (CUDA Cores)

1215 MHz

1401 MHz

Memory Clock
(Clock rate / Data rate)

837 MHz / 3348 MHz

924 MHz / 3696 MHz

Total Video Memory

1280 MB

1536 MB

Memory Interface

320-bit

384-bit

Total Memory Bandwidth

133.9 GB/s

177.4 GB/s

Texture Filtering Rate (Bilinear)

34.0 GigaTexels/sec

42.0 GigaTexels/sec

Fabrication Process

40 nm

40 nm

Connectors

2 x Dual-Link DVI-I
1 x Mini HDMI

2 x Dual-Link DVI-I
1 x Mini HDMI

Form Factor

Dual Slot

Dual Slot

Power Connectors

2 x 6-pin

1 x 6-pin, 1 x 8-pin

Max Board Power (TDP)

215 Watts

250 Watts

Recommended PSU

550 Watts

600 Watts

GPU Thermal Threshold

105° C

105° C

MSRP

$349 USD

$499 USD

 




 





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