Geforce GTX 295 - Review of Nvidia's final dual graphics card
Three weeks ago we published a preview of Nvidia's Geforce GTX 295 and now it's time for a full review of the card. What is the Geforce GTX 295 capable of in matters of power consumption, loudness and micro stuttering?
Today Nvida's new dual GPU card based on two 55 nanometer GT200b GPUs is finally launched. It is the first of Nvidia's gaming cards that exceeds the TFLOPS limit. This is achieved by two GPUs each of which has 240 Shader ALUs, 80 texture units and 28 ROPs with a 448 bit memory interface each. The Geforce GTX 295 is supposed to win back the performance crown for Nvidia since currently AMD has the fastest card with the dual GPU model Radeon HD 4870 X2.
Furthermore the GTX 295 is the first 55 nanometer product introduced to Nvidia's enthusiast section. The two GT200b chips are produced in the finer structure and thus can be run with on lower power consumption. Nvidia specifies the TDP of the card with 289 watt. This actually is three watt higher than the HD 4870 X2 is said to need, but a lot less than two GTX 260s with 182 watt each. And compared to the latter ones the GTX 295 has additional functional units. All important details are listed in the chart below.
As it has been the case with the Geforce 9800 GX2, Nvidia uses a so called sandwich design for the GTX 295 (without the GX2 tag) Two PCBs with the two GPUs between them are cooled by a single cooling solution. Nvidia says this design has thermal benefits compared to AMD's tandem design. In contrast to the 9800 GX2 Nvidia uses bigger areas on the slot cover and the upper side of the card to exhaust the heated air from between the two PCBs of the GTX 295. The noise of the radial fan is rather unobtrusive and could be described as hissing; we couldn't hear drumming noises. If you are afraid of getting deaf because of the cooling, we can give an all clear even for our pre-production sample. From a subjective point of view we already had much louder cards in our Test Lab. At full workload the card is not - as expected - the appropriate choice for silent PCs, but in idle it is surprisingly quiet. See "Power Consumption, Loudness and Cooling” for more details.
|Comparison: theoretical specifications|
|Nvidia Geforce||AMD Radeon|
|9800 GTX+||8800 Ultra||GTX 260-216||GTX 280||GTX 295*||HD 4870 X2*||HD 4870|
|Core frequency (MHz)||738||612||576||602||576||750||750|
|Shader ALU frequency (MHz)||1,836||1,512||1,242||1,296||1,242||750||750|
|Memory frequency (MHz)||1,100||1,080||999||1,107||999||1,800||1,800|
|Memory bus (Bit)||256||384||448||512||2x448||2x256||256|
|MAD performance (GFLOP/s)||470||387,1||536,5||622,1||2x596,2||2x1,200||1,200|
|MAD+MUL/ADD performance (GFLOP/s)||705**||580.7**||804.8**||933.1**||2x894,2||2x1,200||1,200|
|Texture fillrate (MTex/s)||47,232||19,584||41,472||48,160||2x46,080||2x30,000||30,000|
|Memory bandwidth (MiByte/s)||70,400||103,680||111,888||141,696||2x111,888||2x115,200||115,200|
|Multi GPU||SLI, 3-W.-SLI||SLI||SLI||SLI, 3-W.-SLI||Q-SLI||Crossfire X||Crossfire X|
|PCI-E. power connector (6-Pin/8-Pin)||2x/0x||2x/0x||2x/0x||1x/1x||1x/1x||1x/1x||2x/0x|
Two NVIO chips are working in the PCB sandwich of the GTX 295. According to Nvidia one is feeding the two Dual-Link DVI ports, while the other one is supplying data to the additional HDMI port. So up to three displays can be connected to the card.
- Seite 1Geforce GTX 295 - Review of Nvidia's final card: Introduction
- Seite 2Geforce GTX 295 - Review of Nvidia's final card: Power Consumption, Loudness and Cooling
- Seite 3Geforce GTX 295 - Review of Nvidia's final card: Micro stuttering
- Seite 4Geforce GTX 295 - Review of Nvidia's final card: Overclocking
- Seite 5Geforce GTX 295 - Review of Nvidia's final card: Test system and Benchmark selection
- Seite 6Geforce GTX 295 - Review of Nvidia's final card: Benchmark Call of Duty: World at War (dt., DX9)
- Seite 7Geforce GTX 295 - Review of Nvidia's final card: Benchmark Crysis Warhead (DX10)
- Seite 8Geforce GTX 295 - Review of Nvidia's final card: Benchmark Fallout 3 (DX9)
- Seite 9Geforce GTX 295 - Review of Nvidia's final card: Benchmark Far Cry 2 (DX10)
- Seite 10Geforce GTX 295 - Review of Nvidia's final card: Benchmark Left 4 Dead (dt., DX9)
- Seite 11Geforce GTX 295 - Review of Nvidia's final card: Benchmark Race Driver GRID (DX9)
- Seite 12Geforce GTX 295 - Review of Nvidia's final card: Benchmark Stalker Clear Sky (DX10/10.1)
- Seite 13Geforce GTX 295 - Review of Nvidia's final card: Benchmarks with extreme FSAA modes
- Seite 14Geforce GTX 295 - Review of Nvidia's final card: Benchmarks with Intel Core i7 plus CPU scaling
- Seite 15Geforce GTX 295 - Review of Nvidia's final card: Benchmarks with Beta drivers (DX10 only)
- Seite 16Geforce GTX 295 - Review of Nvidia's final card: Conclusion
- Seite 17Bildergalerie zu "Geforce GTX 295 - Review of Nvidia's final dual graphics card"
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