VR-Zone checks out the GTX 285, a slightly higher clocked version of the GTX 280. Just how much difference can a dieshrink make to this 1.4 billion transistor monster of a GPU?

Eager to improve on the (now discontinued) GTX 280, Nvidia did the obvious thing and sent the GT200 GPU for a die shrink. The result is the GeForce GTX 285, which is essentially a higher clocked GTX 280.

Before we move on, let’s take a quick look at the specifications of both the GTX280 and the GTX285.

  Nvidia GeForce GTX 295 Nvidia GeForce GTX 285 Nvidia GeForce GTX 280 Nvidia GeForce GTX 260 Core 216 ATI Radeon HD4870 X2 ATI Radeon HD4870 1GB
GPU 2x GT200b GT200b GT200 GT200/GT200b R700 XT  R700
Process (nm) 55 55 65 65/55 55  
Core Clock (Mhz) 576 648 620 576 750 750
Shader Clock (Mhz) 1242 1476  1296 1242 750 750
Memory Clock (Mhz)* 999 1242  1107 999 900 900
Memory Size
(MB)
1792
(2x 896)
1024 1024 896 2048
(2x 1024)
1024
Memory Type GDDR3 GDDR3  GDDR3 GDDR3 GDDR5  GDDR5
Unified Shaders/ Stream Processors 480
(2x 240)
240 240 216 800  800
Texture Mapping Units 160 (2x 80) 80 80 74 80 (2x 40) 40
Raster Operation Units 56 (2x 28) 32 32 28 32 (2x 16) 32
Memory Interface
(bits)
896
(2x 448)
512 512 448 512
(2x 256)
 256
Outputs (on reference design) 2x Dual-Link DVI
1x HDMI
2x Dual-Link DVI
TV-Out
2x Dual-Link DVI
TV-Out
2x Dual-Link DVI
TV-Out
2x Dual-Link DVI
TV-Out
 2
Power Connectors 1x 6-pin, 1x 8-pin 2x 6-pin 1x 6-pin, 1x 8-pin 2x 6-pin 1x 6-pin, 1x 8-pin 2x 6-pin
 Thermal Design Power (w) 289 183 236 182 286 150
Estimated Retail Price (USD) 499 399 289 449

*Effective clock, or transfers/second, is twice the stated speed for GDDR3 and four times the stated speed for GDDR5.

The GTX 285 we’re using in this review is Asus’ TOP model, which uses the reference heatsink but is factory-overclocked. For the purposes of this article however we’ll be
downclocking the card to reference speeds and treating it as a reference GTX 285.

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