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Guru3D.com » Review » PowerColor Radeon HD 5770 PCS+ review » Page 2

PowerColor Radeon HD 5770 PCS+ review - Radeon HD Series 5700 features

by Hilbert Hagedoorn on: 01/31/2010 02:00 PM [ ] 0 comment(s)

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Radeon HD Series 5700 features

Today's tested product will position itself smack down in-between the Radeon HD 4850 and the Radeon 4870 in terms of performance. The Radeon HD 4870 which we all know and love for its performance has 956 million transistors embedded onto that die. The new Radeon HD 5700 GPUs have 1040 million transistors. Correct, that is 1+ billion transistors tucked away in a small chip. The fabrication node, just like the 5800 series, is 40nm for this product.

  • The reference Radeon HD 5770 will be clocked at 850 MHz. Its memory is clocked at 1200 MHz (4800 MHz effective).
  • The PowerColor PCS+ 5770 is clocked slightly higher at 875 MHz and the memory is clocked at 1225 MHz (4900 MHz effective).

Shader processors then; similar to the Radeon HD 4850/4870/4890 the Radeon HD 5770 will have 800 Shader processors, with the 5750 having 720 Shader processors. Though that looks a little pale in comparison to the 5800 series, remember... these are mid-range products at really affordable prices (!).

The number of ROP units are rocking steady at 16 and sure -- texture units remain at 40 for the 5770 and 36 for the 5750.

But before you get blinded by all the specs in a few lines of text, let's break down the card announced today in comparison to last year's Radeon HD 4870.

  Radeon HD 4870 Radeon HD 5750 TUL PCS+
 5770
Radeon HD 5870
Process 55nm 40nm 40nm 40nm
Transistors 956M 1.04B 1.04B 2.15B
Die Size 263 mm² TBA TBA 334 mm²
Core Clock 750 MHz 700 MHz 875 MHz 850 MHz
Shader Processors 800 720 800 1600
Compute Performance 1.2 TFLOPs 1.008 TFLOPs 1.36 TFLOPs 2.72 TFLOPs
Texture Units 40 36 40 80
Texture Fillrate 30.0 GTexels/s 25.2 GTexels/s 34 GTexels/s 68.0 GTexels/s
ROPs 16 16 16 32
Pixel Fillrate 12.0 GPixels/s 11.2 GPixels/s 13.6 GPixels/s 27.2 GPixels/s
Z/Stencil 48.0 GSamples/s 44.8 GSamples/s 54.4 GSamples/s 108.8 GSamples/s
Memory Type GDDR5 GDDR5 GDDR5 GDDR5
Memory Clock 900 MHz 1150 MHz 1225 1200 MHz
Memory Data Rate 3.6 Gbps 4.6 Gbps 4.8 Gbps 4.8 Gbps
Memory Bandwidth 115.2 GB/s 73.6 GB/s 76.8 GB/s 153.6GB/s
Maximum Board Power (TDP) 160W 86W 108W 188W
Idle Board Power 90W 16W 18 27W

These numbers are really good, for the money this is going to make an excellent mid-range product series. We have not discussed it just yet, but memory; ATI will stick to DDR5 for their mid-range and high-end products. On the 5700 they'll crank it down a notch as we get 128-bit memory, cutting the bandwidth in half from 256-bit. However, since it's gDDR5 memory (quad data rate) it will still offer sufficient bandwidth.

So we established that the culprit of the 5700 series will be a cut off memory bandwidth, and this is the reason why its performance actually will be slightly lower (on average) than say a Radeon HD 4870.

However, you can expect the Radeon HD 5770 to outperform any current single-GPU based graphics card in the mid-range segment like the Radeon HD 4850 and GeForce GTS 250. And all that with a single chip utilizing less than 108 Watts.

PowerColor will get you a fairly nice package and bundle. First off, the card itself differs from the reference design, it comes with a custom cooler and next to that we spot no less than four graphics output connectors in the form of two DVI connectors, one DisplayPort connector and then a HDMI connector.

Inside the package we'll find the typical items like driver CD, manual, graphics card but also a coupon for you to download Colin McRae Dirt 2, a very nice and valuable addition alright.

PowerColor Radeon HD 5770 PCS+




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