As soon as we received our first overclocked Radeon HD 4870, the recently reviewed PowerColor PCS+ HD 4870 1GB Radeon, we knew that it was always going to be a matter of time before more overclocked variants started popping up. Fresh in our labs then is the Palit Radeon HD 4870 Sonic Dual Edition (quite a mouthful, we know). Boasting a cooler that can only be described as monstrous, the Palit Radeon HD 4870 Sonic Dual Edition claims, like such cards usually do, to offer improved performance and cooler, quieter operation.
Now Palit is not trying to sound flashy with the card's long name. It does mean something, so allow us to explain. "Sonic" indicates that this particular card belongs to Palit's rather popular series of overclocked cards, while "Dual Edition", on the other hand, refers to the card's dual bios, which allows it to either boot in "Sonic" or "Turbo" mode (more on this Dual Bios later).
So before we get into details about this card, let us first take a look at how the card stacks up against other comparable cards.
|Model||Palit Radeon HD 4870 Sonic Dual Edition 512MB||Radeon HD 4870 512MB||Radeon HD 4850 512MB||NVIDIA GTX 280 1GB||NVIDIA GTX 260 896MB|
|Transistor Count||956 million||956 million||956 million||1400 million||1400 million|
|Core Clock||750/775 MHz||750MHz||625MHz||602MHz||576MHz|
|Stream Processors||160 Processors (800 Stream processing units)||160 Processors (800 Stream processing units)||160 Processors (800 Stream processing units)||240 Stream Processors||192 Stream Processors|
|Stream Processor Clock||750/775MHz||750MHz||625MHz||1296MHz||1242MHz|
|Texture Mapping Units (TMU) or Texture Filtering (TF) units||40||40||40||80||64|
|Raster Operator units (ROP)||16||16||16||32||28|
|Memory Clock||3800/4000 MHz GDDR5||3600MHz GDDR5||2000MHz GDDR3||2214MHz GDDR3||1998MHz GDDR3|
|DDR Memory Bus Width||256-bit||256-bit||256-bit||512-bit||448-bit|
|Memory Bandwidth||121.6/128 GB/s||115.2GB/s||64GB/s||141.7GB/s||111.9GB/s|
|PCI Express Interface||PCIe ver 2.0 x16||PCIe ver 2.0 x16||PCIe ver 2.0 x16||PCIe ver 2.0 x16||PCIe ver 2.0 x16|
|Molex Power Connectors||2 x 6-pin||2 x 6-pin||6-pin||6-pin, 8-pin||2 x 6-pin|
|Multi GPU Technology||CrossFireX||CrossFireX||CrossFireX||SLI||SLI|
|DVI Output Support||2 x Dual-Link, 1 x DisplayPort||2 x Dual-Link||2 x Dual-Link||2 x Dual-Link||2 x Dual-Link|
|HDCP Output Support||Yes||Yes||Yes||Yes||Yes|