Diamond Radeon HD 4870 X2 review Print E-mail

Diamond Radeon HD 4870 X2 reviewPCWizKid welcomes ATI's "Dual GPU King" with Diamond Multimedia's HD 4870 X2 - 2GB Edition.   Though most HD4870 X2's may look similar since they use the default reference cooling design from ATI, Diamond spares no expense in the details.

When I first saw the black box it came in , with no pictures or fancy graphics, you knew we were dealing with a serious graphics card.  Taking a closer look the rather large card has a nice black finish all around, from the PCI slot and connector to the PCB board and the backplate, all black.  Though this was not the "Black Edition" pre-overclocked model which is also available from Diamond, there was nothing stopping me from overclocking these GPU's aswell for performance.  PC enthusiasts will appreciate the terrific results this card delivers.

Watch PCWizKid's detailed video review of the Diamond Radeon HD 4870 X2



PCWizKid's Test system uses the AMD Phenom II processors, AMD 790GX based motherboards, and the well known ATI HD Radeon 4800 series graphics cards.  This combination is referred to as the "Dragon" platform.

- Phenom II 720 X3, overclocked at 3.4Ghz (200Mhz bus speed x 17 multiplier)

  • Core voltage only was raised to 1.475v for a stable system at that high frequency.  The no load temperature was 24C and full load temperature was 30C. Ambient room temperature was 20 Celsius during all tests.

- Asus M3A78-T Motherboard
- Diamond HD4870 x2 2GB

  • Video card was overclocked to 790Mhz x2 Core clock and 990Mhz (2000Mhz Effectively x2) memory clock
  • The AMD ATI Radeon Catalyst drivers version were updated to version 9.1
  • ATI Overdrive was tweaked manually and the fan was set to at least 40-60% speed
  • DirectX 10 was used

- Kingston HyperX 4GB DDR2 1066, settings were 5-5-5-18
- Cooler Master V8 CPU Cooler
- Hiper Osiris Mid Tower Case and Hiper 880 Watt PSU
- Replaced the front intake fan with a Silverstone F123 variable fan , which was used between 1200 to 2600 RPM
- Windows Vista Ultimate 64bit SP1 fully up to date
- All tests are performed at 1280x1024 resolution for consistency in results and comparisons with other system tests.

  • Game settings for benchmarks are always maxed out at either Very High or Enthusiast levels when available.
  • 3dmark06, 3dVantage, SiSandra 2009, Everest,GPU-Z  and ATI Overdrive were tools and utilities used in the benchmarking process which was repeated several times to ensure acurate results

Graphics Card specifrications

[SKU : 4870X2PE52G] DIAMOND ATI Radeon™ HD 4870 X2 PCIE 2048MB GDDR5 Video Card

GPU : HD 4870 X2
ASIC Core : RV 700 X2
Default Core Clock : 750 MHZ x 2
GPU Architecture :
BUS : PCI Express x16
Ports : 2 Dual-Link DVI,Video Out [S-Video, Composite, HDTV]
Cooling : Active - FanCooler
MFG Process : 55nm fabrication process
Transistor Count : 956 million transistors on 55nm fabrication proces
Stream Processors : 800 X2


Default Memory Clock : 900 MHz x 2
Memory Configuration : 64Mx32
Memory Type : GDDR5
Memory Bandwidth : 180.6 GB/sec
Memory Size : 2048MB
Memory Interface : 256-Bit x 2
RAMDAC : Dual 400Mhz X2
Video Quality

CrossFire : CrossFire X
QuadFire Support : YES
Direct-X : 8.0, 9.0, 10.0, 10.1
Open GL : OpenGL 2.0
Vide Acceleration : MPEG-2, MPEG-4, DivX, WMV9, VC-1, and H.264
Max Resolution Analog : 2048 x 1536
Max Resolution Digital : 2560 x 1600
HDR F.Point Rendering : 128
HDR Integer : 16-bit integer or floating point
Pixel Operation :
Standard Slot Solution : DOUBLE
Anti Aliasing Modes : Smoothvision HD + Adaptive AA.Up to 24x Custom Filter Anti-Aliasing
Antisotropic Modes : 2x/4x/8x/16x high quality adaptive anisotropic filtering modes (up to 128 taps per pixel)
Texture Support : Texture filtering features 2x/4x/8x/16x high quality adaptive anisotropic filtering modes (up to 128 taps per pixel) 128-bit floating point HDR texture filtering Bicubic filtering sRGB filtering (gamma/degamma) Percentage Closer Filtering (PCF) Depth & stencil texture (DST) format support Shared exponent HDR (RGBE 9:9:9:5) texture format support.

Display Support

HDMI : HDMI 1.2 / HDMI Ready
Native Display Support : 18-, 24-, and 30-bit
3D Resolution : 2560x1600
TV-OUT Resolution : 720
Dual Display support : Hydravision 4
Holywood Q.VIDEO : YES

Hardware Requirements

A 550 Watt or greater power supply with 75 Watt 6-pin and 8-pin PCI Express® power connectors are recommended if you are installing only 1 card.  If installing 2 cards in crossfire configuration, a 660 Watt or greater PSU is recommended.  Please ensure your motherboard also has a PCI Express® X16 lane graphics slot available for installing at least 1 card.  For more details you can visit Diamond Multimedia here. Since this is a new generation graphics card you are advised to have a CPU which is at least 2Ghz and a system with at least 1GB of RAM.

ConclusionsPCWizKid crowns the King of dual GPU cards to Diamond

This big boy from Diamond Multimedia delivers a big punch against the competition.  PCWizKid crowns the HD4870 X2 from Diamond as the leader of the dual GPU on a single board category.  An impressive performance overall, which is proven not only with its overclocking capability but reasonable GPU temperatures and benchmark results which extreme pc enthusiasts are looking for.  This is a premium quality product and thus the price tag shows.  If you have the need for speed then this is the card to give you the fix.

DIAMOND Radeon HD 4870 X2 4870X2PE52GXOC Video Card Click here for the latest pricing on the  DIAMOND Radeon HD 4870 X2 4870X2PE52GXOC Video Card

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