AMD Radeon HD 6450 Review


AMD released their Radeon HD6450 after the HD6790 wich filled the gap in the 6000 series at around 115€. The HD6450 is based on their all-new Caicos graphics processor which is an evolutionary step forward from HD 5450, improving performance and media playback features. The 40nm Caicos GPU comes with 160 shaders which is twice that on the previous-generation HD 5450 and instead of (G)DDR3 memory, the Radeon HD 6450 also uses fast GDDR5 memory which will help with available memory bandwidth.

AMD gave me the chance to take a look at one of their samples for the HD6450 before we do I would like to remember this is atargeted at the entry-level market with HTCP’s,file server’s and other office system builds in mind with a PVP of about ~50€. It has support for DirectX 11, EyeFinity and accelerated HD video decode are features that offset it from the integrated graphics competition.

I will try to keep it simple and brief, looking at the new Caicos GPU is based on the same architecture that we first saw in the Barts GPU used on the HD6000 card series except that is much less complex, and besides the improvements over the HD5450 , the Radeon HD 6450 comes in DDR3 or GDDR5 which theoretical doubles throughput of DDR3 with the same memory clock and GDDR5 should compensate for the 64-bit memory interface.

Last but not least the HD6450 series improves tessellation performance, includes Eyefinity enhancements, and, of course, features UVD 3, including the ability to accelerate Blu-ray 3D video over HDMI 1.4a.

HD 5450
GT 220
GT 520
HD 6450
GT 430
HD 5550
Shader units 16 80 48 48 160 96 320
ROPs 4 4 8 4 4 4 8
GPU GT218 Cedar GT216 GF119 Caicos GF108 Redwood
Transistors 260M 292M 486M Unknown 370M 585M 627M
Memory Size 512 MB 512 MB 512 MB 1024 MB 1024 MB DDR3

/512MB GDDR5

1024 MB 1024 MB
Memory Bus Width 64 bit 64 bit 128 bit 64 bit 64 bit 128 bit 128 bit
Core Clock 589 MHz 650 MHz 625 MHz 810 MHz 750 MHz 700 MHz 550 MHz
Memory Clock 533 MHz 800 MHz 790 MHz 800 MHz 900 MHz 900 MHz 1000 MHz
Price $40 $35 $50 $60 $55 $60 $60

Here you can see the competition, and notice the evolution from the HD5450 to the new HD6450 Model.In my personal opinion the only real competition is the Radeon HD 5550 but this one doesn’t support Blu-ray 3D decode acceleration, though it is capable of playing back this format over HDMI 1.4a too.


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