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Geforce GTX 285 reviewed: Performance, Loudness and Power consumption

Geforce GTX 285 reviewed

Nvidia's Geforce GTX 285 has to prove its capabilities in nine games and 3DMark Vantage, if it is a worthy successor for the GTX 280. PC Games Hardware also checks overclocking, extreme FSAA modes, loudness and power consumption.

Geforce GTX 285 reviewed
 
[Source: view picture gallery]

Geforce GTX 285 reviewed: Introduction
Today Nvidia's Geforce GTX 285 is officially introduced. The card with the 55 nm GPU GT200b is supposed to replace the GTX 280 and to heat up the price competition with the Radeon graphics cards. Besides a slight increase of the clock speeds Nvidia only switched to a 55 nanometers GPU structure and cost-optimized the PCB layout and the cooler.

The benchmark review with nine games like Left 4 Dead (dt.), Fallout 3, Race Driver Grid, Crysis Warhead or Stalker Clear Sky reveals if this is enough to compete with AMD's cards, which became much cheaper in the meantime, and the GTX 280. Additional tests with extreme FSAA modes like 16xS and overclocking experiments with Supersampling FSAA push the card to the limits.

Geforce GTX 285 - Details of board, RAM and cooler
We already introduced the new Geforce card in every detail at the paper launch. Therefore we summarized the technical specifications in the table below.

Technical specifications Geforce GTX 285
Manufacturer Nvidia Geforce           AMD Radeon      
Graphics card GTX 295* GTX 285 GTX 280 GTX 260-216 9800 GTX+ 8800 GTX HD 4870 X2* HD 4870 HD 4850 HD 3870
Ca. price (Euro) 460.- 350.- 300.- 230.- 140.- 280.- 390.- 190.- 130.- 100.-
Chip 2 x GT200b GT200 GT200 GT200(b) G92(b) G80 2 x RV770 RV770 RV770 RV670
Architecture (Nanometer) 55 55 65 65/55 65/55 90 55 55 55 55
Transistors (Mio.) 2 x 1.400 1.400 1.400 1.400 754 681 2 x 965 965 965 666
Frequency core (MHz) 576 648 602 576 738 575 750 750 625 775
Frequency Shader ALUs (MHz) 1.242 1.476 1.296 1.242 1.836 1.350 750 750 625 775
Frequency memory (MHz) 999 1.242 1.107 999 1.100 900 1.800 1.800 1.000 1.125
Shader version 4.0 4.0 4.0 4.0 4.0 4.0 04. Jan 04. Jan 04. Jan 04. Jan
Shader ALUs 2 x 240 240 240 216 128 128 2 x 800 800 800 320
Memory size (MiByte) 2 x 896 1.024 1.024 896 512 768 2 x 1.024 512 512 512, 1.024
Memory bus (Bit) 2 x 448 512 512 448 256 384 2 x 256 256 256 256
Type of memory GDDR3 GDDR3 GDDR3 GDDR3 GDDR3 GDDR3 GDDR5 GDDR5 GDDR3 GDDR4
MAD performance (GFLOP/s) 2 x 596,2 708,5 622,1 536,5 470 345,6 2 x 1.200 1.200 1.000 496
Texture fillrate (MTex/s) 2 x 46.080 51.840 48.160 41.472 47.232 36.400 2 x 30.000 30.000 25.000 12.400
Memory bandwidth (MiByte/s) 2 x 111.888 158.976 141.696 111.888 70.400 86.400 2 x 115.200 115.200 64.000 72.000
Multi Sampling, max. 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x
Anti Aliasing, max. 16xQ 16xQ 16xQ 16xQ 16xQ 16xQ 24x CFAA 24x CFAA 24x CFAA 24x CFAA
Multi GPU SLI SLI, 3-W.-SLI SLI, 3-W.-SLI SLI SLI, 3-W.-SLI SLI Crossfire X Crossfire X Crossfire X Crossfire X
PCI-E connectors (6-Pin/8-Pin) 1x/1x*** 2x/0x 1x/1x*** 2x/0x 2x/0x 2x/0x 1x/1x 2x/0x 1x/0x 1x/0x

* Individual values don't necessarily double for multi GPU cards
** MUL performance limited
*** 8-pin connector is compulsory


As mention, the PCB has been modified. On the one hand this was achieved because of the TDP which has been lowered from 236 watt to 183 watt and the appropriate cooler. On the other hand there was the intention to lower costs in order to sell the cards for a lower price. AMD had put a lot of pressure on Nvidia with the HD 4870 series.

Geforce GTX 285 - new Nvidia graphics card reviewed at PC Games Hardware Online.
 
Geforce GTX 285 - new Nvidia graphics card reviewed at PC Games Hardware Online. [Source: view picture gallery]
Even without the heat spreader, which makes the graphics processor appear bigger than it actually is, the Die of the old 65 nm GT200 is, according to our digital caliper, about 606 mm² big (CPU-Z displays 576 mm²). TSMC, who produce the GT200 and GT200b, specify a linear shrink of 10 percent for the new architecture. If Nvidia was able to make full use of those possibilities, the Die size of the GT200b should be about 490 mm² - this is still almost twice the size of the RV770 Die which is working on AMD's Radeon HD 4800 cards.

Nvidia doesn't only lower the Die size, but also cuts costs on the board and the cooler. Instead of the full metal cover of the old GTX 2x0 series the GTX 285 only has the metal frame around the GPU, which has been used on the first Geforce 8800 cards already. The cooler has less heat pipes and is a little smaller - the radial fan is still the same. Due to the lower TDP, the 8-pin power connector isn't required for the GTX 285 anymore and the card only needs two 6-pin plugs. The used GDDR3 RAM is from Hynix's currently fastest selection and specified for 1,300 MHz - on the GTX 285 it is clocked to 1,242 MHz.

Picture gallery  (enlarge to view source)



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Author: Spille, Vötter, Sauter (Jan 15, 2009)






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Comments (1)

Read all comments here!
Ar.Pi Re: Geforce GTX 285 reviewed
Senior Member
16.01.2009 07:35
Good product.

But like you concluded; the price of admission is just too high. 4870 can be had for 200$ less than this card and is really the main appeal for me if i'm going to build a new rig.

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