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ASUS EAH4890 TOP HTDI/1GD5/A Radeon HD 4890 Rev. B Videocard Review

ASUS EAH4890 TOP HTDI/1GD5/A Radeon HD 4890 Rev. B Videocard Review - PCSTATS
Abstract: The ASUS EAH4890 TOP HTDI/1GD5/A videocard ships with its ATI 'R790' GPU running at 850MHz, and its 1GB of GDDR5 memory clocked to a respectable 975MHz, or effectively 3.9GHz (quad-pumped means 4x975= 3.9GHz).
 90% Rating:   
Filed under: Video Cards Published:  Author: 
External Mfg. Website: ASUS Sep 19 2009   J. Apong  
Home > Reviews > Video Cards > ASUS EAH4890 TOP HTDI/1GD5/A

Overclocking the HD4890 GPU to 1GHz!

Overclocking Results:
Stock Overclocked
GPU Speed: 850 MHz 985 MHz
Memory Speed: (975) 3900 MHz (1200) 4800 MHz effective
Voltage Tweaked to 1.387v (GPU)
GPU Speed: 850 MHz 1000 MHz
Memory Speed: (975) 3900 MHz (1200) 4800 MHz effective
If you're new to Overclocking and not sure what to do, check out these two excellent Guides for some pointers:
Overclocking the CPU and Memory
Overclocking the Videocard

The ASUS EAH4890 TOP HTDI/1GD5/A videocard ships with its ATI 'R790' GPU running at 850MHz, and its 1GB of GDDR5 memory clocked to a respectable 975MHz, or effectively 3.9GHz (quad-pumped means 4x975= 3.9GHz).

What makes this videocard particularly special is that ASUS have enabled GPU voltage tweaking via the Asus SmartDoctor overclocking tool. SmartDoctor allows users to change GPU and memory clock speeds, and tweak the ATI RV790 GPU voltage from a default of 1.312v to as high as 1.45v(we don't suggest you push voltage that high). Voltage adjustments are a handy overclocking tool, but generally speaking you always want to keep voltages as close to the stock values as possible.

As always, PCSTATS overclocked the videocard through ATI's Catalyst Control Center using ATI Overdrive. The fan was set to run at 100% from the start, leaving GPU temps around 48C degrees. PCSTATS started with the GPU first, pausing to test the results with a quick 3D benchmark before continuing. The same process is repeated with the memory, then both GPU and memory are overclocked together.

The ATI Radeon HD 4890 GPU was slowly increased from 850MHz in roughly 25MHz jumps, and in a matter of minutes we had it operating at 895MHz without any visible artifacts or instability. I was able to push the GPU as far as 1000MHz (the maximum under ATI Overdrive), but after a few moments in 3Dmark06 it crashed... a voltage boost may fix that. For the time being we settled on a pure overclocked GPU speed of 990MHz.

The 1GB of GDDR5 memory was a lot easier to overclock. With the GPU re-set to 850MHz (default speed), I set about overclocking the RAM from its default speed of 975MHz to 1100MHz, then 1185MHz.. and finally 1200MHz (the maximum in ATI Overdrive). The GDDR5 memory overclocked like a dream, no noticeable artifacts or polygon tearing at all. End result, the maximum memory overclock was a staggering 1200MHz, or effectively 4.8GHz!

GPU and Memory Maximum Overclock (non-volted)

Without any adjustments the ASUS HD 4890 should be capable of 990MHz GPU / 1200MHz memory, however this is hardly ever possible - something always has to give. Instead, we found that the EAH4890 TOP HTDI/1GD5/A videocard overclocked nicely to 985MHz GPU / 1200MHz memory, without any GPU voltage adjustments.

ASUS Voltage Tweak - ATI RV790 GPU Overclocked with extra juice!

With a baseline overclock of 985MHz GPU /1200MHz memory established, PCSTATS set about overclocking the ATI RV790 GPU with the aid of a slight voltage boost from 1.312v (default) to 1.35v with the ASUS SmartDoctor software. Success! The small voltage tweak brought the EAH4890 to 1000MHz GPU / 1200MHz memory (the maximum in ATI Overdrive) without any fuss!

All the while GPU temperatures hovered around 50-52C degrees. I have to say that ASUS EAH4890 HTDI/1GD5/A videocard did not disappoint.

In the end PCSTATS overclocked the EAH4890 TOP HTDI/1GD5/A videocard to 985MHz GPU / 1200MHz memory without any voltage changes, and 1000MHz GPU / 1200MHz memory by tweaking the GPU to 1.35v.

I guess that Fujitsu capacitor really does make a difference to overclocking potential, fantastic results wouldn't you say?

Prelude to Benchmarks

The details of how the EAH4890 TOP HTDI/1GD5/A videocard was configured for benchmarking; the specific hardware, software drivers, operating system and benchmark versions are indicated below. All benchmarks for the videocard were run in Windows Vista Ultimate, the reference video cards were tested in both Windows XP and Vista for the DX10 benchmarks.

PCSTATS is in the process of making the transition to a Windows Vista and Intel CPU test platform, so keep this in mind as you scan the benchmark results. In the second column are the general specs for the reference cards this Radeon HD 4890 videocard is compared against.

PCSTATS Test System Configurations
Test System Reference System #1 Reference System #2
Processor: Intel Core 2 Duo E8400 (775) Intel Core 2 Duo E6750 (775) AMD Athlon64 FX-62 (AM2)
Clock Speed:

15 x 200MHz = 3.0GHz

14 x 200MHz = 2.6GHz 14 x 200MHz = 2.8GHz

ASUS P5E3 Premiun (Intel X48 Express)

MSI X48 Platinum (Intel X48 Express)

Foxconn C51XEM2 (NF 590 SLI)

Asus EAH4890 HTDI/1GD5/A Rev.B
Gigabyte GV-N26OC896H-GA
Sparkle GTX260 Core 216
Gigabyte GV-N96TSL-1GI

Palit Radeon HD 4870X2
ASUS Radeon EAH4850/HTDI/512MA
MSI Radeon R3870X2-T2D1G-OC
ASUS Radeon EAH3870X2 1G
Diamond HD 3650 Pe 512
MSI R4830-T2D512-OC

Foxconn FV-N88SMCD2-ONOC
nVidia GeForce 8600GTS SLI
Gigabyte GV-NX85T256H SLI
Gigabyte GV-NX85T256H
Gigabyte GV-NX76GT256D-RH
Biostar Sigma-Gate GeForce 7600GS
Albatron 8600GT-256
Palit 9600GT Sonic
Biostar V903GT52-NV1AN *


Corsair DOMINATOR Twin2X2048-1800C7D (DDR3)

Corsair Twin2X2048-6400C3 (DDR2)

Hard Drive:

74GB Western Digital Raptor WD740


ASUS BC-1205PT-BD Blu-Ray Drive

Monitor (1080p):


Power Supply: PC Power amp; Cooling TurboCool 750W
Heatsink: Intel E8400 Reference Intel E6750 Reference Athlon64 FX-62 Reference Heatsink
Test System Setup:

Microsoft Windows Vista Ultimate 32-bit
Intel INF
Catalyst 9.4
Forceware 185.85
nVidia 15.23

Microsoft Windows XP Pro SP2
Microsoft Windows Vista Ultimate 32-bit*


3DMark Vantage
Far Cry 2
Call of Juarez
Lost Planet

Benchmark results are organized by GPU manufacturer first (AMD/ATI or nVidia), then by GPU generation, and then by GPU class (high end, mainstream, value). This approach provides a clearer view of how performance can differ from generation to generation, and class to previous generation. The product being tested is marked with the red colour bar.

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Contents of Article: ASUS EAH4890 TOP HTDI/1GD5/A
 Pg 1.  ASUS EAH4890 TOP HTDI/1GD5/A Radeon HD 4890 Rev. B Videocard Review
 Pg 2.  ATI Radeon HD 4890 Core Technologies
 Pg 3.  Videocard Power Consumption Measurements
 Pg 4.  — Overclocking the HD4890 GPU to 1GHz!
 Pg 5.  Videocard Benchmarks: 3DMark06
 Pg 6.  DX10 Videocard Benchmarks: 3DMark Vantage
 Pg 7.  DX10 Videocard Benchmarks: Stalker, Crysis
 Pg 8.  DX10 Videocard Benchmarks: Call of Juarez
 Pg 9.  DX10 Videocard Benchmarks: Lost Planet
 Pg 10.  Videocard Benchmarks: FEAR
 Pg 11.  AA/AF tests: Far Cry 2
 Pg 12.  AA/AF tests: Crysis and Conclusions

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