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ASUS EAH4770 FML/DI/512MD5/A Radeon HD 4770 Videocard Review

ASUS EAH4770 FML/DI/512MD5/A Radeon HD 4770 Videocard Review  - PCSTATS
Abstract: Once the box is open it's clear Asus has made some big changes from the reference Radeon HD 4770, starting with the heatsink. Asus claims its new design will increase airflow volume and improve heat dispersion, but it's hard not to notice that the fan shroud resembles a Formula 1 racer.
 88% Rating:   
Filed under: Video Cards Published:  Author: 
External Mfg. Website: ASUS Aug 17 2009   J. Apong  
Home > Reviews > Video Cards > ASUS EAH4770 FML/DI/512MD5/A

Built for Mainstream Gaming - Radeon HD 4770 Technology

The Radeon HD 4770 'RV740' GPU is manufactured on a 40nm process, making it the first desktop GPU to be made on such a small processing node. The GPU itself contains 826 million transistors, and total board power sits around 80W. Smaller manufacturing processes improve power efficiency and to some extent allows the GPU to be clocked higher without the lock-step increase in heat. Another benefit is that videocard manufacturers can produce more GPUs from the same silicon wafer, which lowers production costs and keeps the videocard affordable.

To really understand where the ATI Radeon HD 4770 (RV740) graphics card fit in, it's best to compare it directly against several mainstream videocards. For although the RV740 GPU is a direct descendent of the RV770 from ATI's flagship Radeon HD 4870 and 4870 X2 graphics cards, much of the original card's complex microarchitecture has been stripped down.

While the model numbers indicate that the Radeon HD 4770 is a series "below" the Radeon HD 4850, the RV740 GPU is clocked at 750MHz, compared to 625MHz for the Radeon HD 4850. The Radeon HD 4770 is paired with GDDR5 memory operating at 800MHz (effective speed: 3200MHz), so it has a higher data rate than the GDDR3 RAM used with Radeon HD 4850 cards.

Videocard Comparison Chart

ATI Radeon HD 4550 ATI Radeon HD 4770 ATI Radeon HD 4830 ATI Radeon HD 4850 NVIDIA Geforce GTS 250
GPU Code Name: RV710 RV740 RV770 RV770 G92+
GPU Process: 55nm 40nm 55nm 55nm 55nm
GPU Transistors: 242 Million 826 Million 956 Million 956 Million 754 Million
Board Power: 25W 80W 110W 110W 150W
GPU Core Clock Speed: 600MHz 750MHz 575MHz 625MHz 738MHz
Memory Speed: 800MHz(1600MHz GDDR3) 800MHz(3200MHz GDDR5) 900MHz(1800MHz DDR) 993MHz(1986MHz DDR) 1100MHz(2200 DDR)
Memory Capacity: 256MB 512MB GDDR5 512MB GDDR3 512MB GDDR3
Memory bandwidth: 12.8 GB/S 51.2 GB/S 57.6 GB/S

63.5 GB/S

70.4 GB/S
Stream Processors: 80 640 640 800 128
Texture units: 8 32 32 40 64
Raster Operators: 4 16 16 16 16
GFLOPS: 96 960 736 1000 470

However the Radeon 4850 GPU still has more robust architecture; 800 stream processors and a 40 texture units compared to the HD 4770 which has 640 stream processors and 32 texture units. Even the Radeon HD 4770's use of GDDR5 memory doesn't make it a clear winner on specs alone, since it's limited to a 128-bit wide memory bus, whereas the Radeon HD 4850 GDDR3 memory uses a 256-bit wide memory bus.

What all this means is that the RV740 GPU isn't quite as smart as the RV770 or NVIDIA's G92+, but it's not too far off.

The Radeon HD 4850 has more stream processors than the Radeon HD 4770 (800 vs 640), while the Geforce GTS250 makes use of more texture units and vertex pipelines, which turns into greater shader processing and geometry rendering power.

This means that games that feature complex special effects like distortion, HDR lighting or reflections, or in games with especially complex geometry, the Radeon HD 4770 videocard won't get quite as much done each rendering pass, although it does boast compute performance of 960GFLOPs.

Altogether the Radeon HD 4770 will likely process less shader information in a single pass than the Radeon HD 4850, but compensate for that by running through each pass more quickly. This should translate to very close benchmark results between the two cards in shader-intensive games like Crysis, but there's no need to speculate. Before PCSTATS cuts to the benchmarks and overclocking, it's time to see if Asus' new manufacturing process has improved the EAH4770 FORMULA's power consumption numbers...

Videocard Power Draw Tests

Here's how the Asus EAH4770 FORMULA videocard stacks up for power consumption in real life against a couple different graphics cards. PCSTATS measures total system power draw and compares that in 3D loaded (max value recorded in 3DMark06) and idle states (at Windows desktop). The power supply used in each test is an A-PFC compliant PC Power and Cooling 750W model.

PCSTATS Benchmark ReportVideocard Power Consumption (Total System Power Draw)
Idle at Desktop Watts Ranking
Palit HD4870 X2 2GB 177
Asus EAH3870 X2 1GB TOP/G/3DHTI/1G/A 153
Asus EAH3870 X2 1GB TOP/G/3DHTI/1G/A (Crossfire) 222
MSI R3870X2-T2D1G-OC 165
Asus EAH4890 HTDI/1GD5/A 137
Asus EAH4850 HTDI/512M 120
MSI R4830 T2D512-OC (Radeon 4830) 108
Gigabyte GV-R477D5-512HB 135
Gigabyte GV-R477D5-512HB Crossfire 180
Asus EAH4770 FML/DI/512MD5/A 105
Asus EAH4770 HTDI/512MD5/A 101
Diamond Viper Radeon HD 2900XT CrossFire 195
Asus EAX1900XTX 2DHTV/512M/A 160
Asus EAX1950PRO/HTDP/256M/A 150
Gigabyte GV-N96TSL-1GI 96
nVidia Geforce 9600GTs in SLI 166
Asus EN9600GT Top/HTDI/512M 152
Palit Geforce 9600GT 512 151
MSI NX8800GTX-T2D768E 196
MSI NX7950GX2-T2D1GE 183
MSI NX7900GTX-T2D512E 165
Gigabyte GV-NX76T256D-RH 140
3D Loaded:


Palit HD4870 X2 2GB 421
Asus EAH3870 X2 1GB TOP/G/3DHTI/1G/A 390
Asus EAH3870 X2 1GB TOP/G/3DHTI/1G/A (Crossfire) 610
MSI R3870X2-T2D1G-OC 330
Asus EAH4890 HTDI/1GD5/A 225
Asus EAH4850 HTDI/512M 202
MSI R4830 T2D512-OC (Radeon 4830) 177
Gigabyte GV-R477D5-512HB 186
Gigabyte GV-R477D5-512HB Crossfire 279
Asus EAH4770 FML/DI/512MD5/A 158
Asus EAH4770 HTDI/512MD5/A 153
Diamond Viper Radeon HD 2900XT CrossFire 549
Asus EAX1900XTX 2DHTV/512M/A 333
Asus EAX1950PRO/HTDP/256M/A 252
Gigabyte GV-N96TSL-1GI 160
nVidia Geforce 9600GTs in SLI 313
Asus EN9600GT Top/HTDI/512M 220
Palit Geforce 9600GT 512 221
MSI NX8800GTX-T2D768E 345
MSI NX7950GX2-T2D1GE 315
MSI NX7900GTX-T2D512E 277
Gigabyte GV-NX76T256D-RH 213

While Asus' re-design of the PCB does seem to have increased the power draw of the EAH4770 FORMULA videocard by a tad, overall power consumption is still well below most PCI Express videocards in its class. Total system power draw is only 158W under load, meaning that even the lowliest of power supplies should be able to handle this videocard. Seems that 40nm GPU really pay's off!

With a new cooler and some improved engineering, PCSTATS sets about overclocking the Radeon HD 4770!

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Contents of Article: ASUS EAH4770 FML/DI/512MD5/A
 Pg 1.  ASUS EAH4770 FML/DI/512MD5/A Radeon HD 4770 Videocard Review
 Pg 2.  — Built for Mainstream Gaming - Radeon HD 4770 Technology
 Pg 3.  ASUS Overclocking Challenge - the Radeon HD 4770, Test Specs
 Pg 4.  Videocard Benchmarks: 3DMark06
 Pg 5.  DX10 Videocard Benchmarks: 3DMark Vantage
 Pg 6.  DX10 Videocard Benchmarks: Crysis, Stalker Clear Sky
 Pg 7.  DX10 Videocard Benchmarks: Call of Juarez
 Pg 8.  DX10 Videocard Benchmarks: Lost Planet
 Pg 9.  Videocard Benchmarks: FEAR
 Pg 10.  AA/AF Videocard Benchmarks: Crysis, Farcry 2

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