ATI Radeon HD 4850 Preview: AMD Delivers Performance for the Masses
by Anand Lal Shimpi & Derek Wilson on June 19, 2008 5:00 PM EST- Posted in
- GPUs
Power, Thermals, Noise and Die Size
The Radeon HD 4850 is a single slot design, but the card itself gets very hot. At idle the card is mostly silent, but like the GeForce GTX 280 you can hear this thing once the fan spins up. It's definitely not as loud as the GTX 280, but it's not silent under full load.
The Radeon HD 4850 draws a bit less power than its closest competitor, the GeForce 9800 GTX.
With two 4850s paired up in CrossFire, we once again ran into issues with our power supply. Our 1000W OCZ EliteXStream wasn't always enough for the dual-GPU setup and in Call of Duty 4 our system rebooted in the middle of our test at 2560 x 1600. Thankfully OCZ sent us a PC Power & Cooling Turbo Cool 1200W unit that is certified for use with GeForce GTX 280 SLI, and if it works on that beast, it had better work with a pair of 4850s in CrossFire.
The PCP&C unit is quite loud as we mentioned in our review, but it got the job done, we were able to run all of our benchmarks without a hiccup after swapping power supplies. Despite AMD's small-GPU strategy, power consumption on multi-GPU configurations is still just as much of a problem as it is for NVIDIA.
The Test
| Test Setup | |
| CPU | Intel Core 2 Extreme
QX9770 @ 3.20GHz |
| Motherboard | EVGA nForce 790i SLI Intel DX48BT2 |
| Video Cards | ATI Radeon HD 4850 ATI Radeon HD 3870 X2 ATI Radeon HD 3870 NVIDIA GeForce 9800 GTX NVIDIA GeForce 9800 GX2 NVIDIA GeForce 8800 GTX NVIDIA GeForce 8800 GT NVIDIA GeForce GTX 280 NVIDIA GeForce GTX 260 |
| Video Drivers | Catalyst Catalyst 8.5 ForceWare 177.34 (for GT200) ForceWare 175.16 (everything else) |
| Hard Drive | Seagate 7200.9 120GB 8MB 7200RPM |
| RAM | 4 x 1GB Corsair DDR3-1333 7-7-7-20 |
| Operating System | Windows Vista Ultimate
64-bit SP1 |
| PSU | PC Power & Cooling Turbo Cool 1200W |
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Clauzii - Thursday, June 19, 2008 - link
Crossfire two of that ;)(starts looking for a humongous PSU...)
rudolphna - Thursday, June 19, 2008 - link
lol oohhh yeah.. I'll be looking for Anandtech to be reviewing PCP&Ps newest 2kW Power supply with 200amps on teh 12V rail :)rudolphna - Thursday, June 19, 2008 - link
PS. (to PCP&P) Switch to 120mm fans, imagine how loud a 2000watt psu will be with an 80mm fan cooling it :)xsilver - Friday, June 20, 2008 - link
the 80mm fan would require its own psu ;)Clauzii - Thursday, June 19, 2008 - link
There goes the carrot cutter :))Devo2007 - Thursday, June 19, 2008 - link
I can walk into a local retailer and pick one up right now (yes, they are actually showing stock on three different cards).Goty - Thursday, June 19, 2008 - link
Something is VERY wrong if a 1000W rated power supply can't boot a system that draws less than 500W at load. Most sites recommend a 500W-600W power supply to run a 4850 CF system, which should be PLENTY of power.Creig - Thursday, June 19, 2008 - link
That's exactly what I was thinking when I read that part of the article. A 4850 supposedly only pulls 110w. So if I was conducting the review, I would have immediately suspected a defective power supply, not an inadequate one.bob4432 - Friday, June 20, 2008 - link
exactly what i was thinking....ocz quality????JarredWalton - Friday, June 20, 2008 - link
I believe the 1000W PSU having problems was specifically in regards to GeForce GTX 280 SLI - though Anand or Derek would have to confirm. The other factor that I don't know is whether the PSU is the problem or perhaps Derek just has really bad electricity in his house. I know I've had no difficulties with even 550W PSUs and 3870 CrossFire (with a Q6600 overclocked to 3.30GHz).