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.