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FirePro V7800 vs GeForce GT 645

CPUCPUGPUGPU

FirePro V7800

2011Core: 725 MHz
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VS
NVIDIA

GeForce GT 645

2012Core: Up to 710 MHz
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FirePro V7800 vs GeForce GT 645 Performance Spectrum

FirePro V7800
4 GB 150
2,028
+1.1%
brand logoRadeon HD 4850 X2
brand logoRadeon HD 5770
brand logoRadeon 630
brand logoRadeon R7 M465X
brand logoRadeon RX Vega M GH
brand logoRadeon RX 7400
brand logoRadeon RX 7700S
brand logoRadeon RX 9060 XT 16GB
GeForce GT 645
2 GB 32
2,006
0.0%
brand logoGeForce 840A
brand logoGeForce GTS 450
brand logoGeForce GTX 550 Ti
brand logoGeForce GTX 580M SLI
brand logoGeForce GTX 1650 Ti with Max-Q Design
brand logoGeForce GTX 980
brand logoGeForce GTX 1080
brand logoTITAN V

About G3D Mark

G3D Mark is a standard benchmark that measures graphics performance in real-world gaming scenarios. It simplifies comparing cards from different brands, where higher scores directly correlate with better fps and smoother gaming experiences.

FirePro V7800 vs GeForce GT 645: Pros, Cons & Final Verdict

See where each GPU makes more sense in practice: raw FPS, VRAM, features, power draw, pricing, and long-term headroom.

FirePro V7800

2011

Why buy it

  • ✅100% more VRAM for high-resolution textures and newer games (4 GB vs 2 GB).

Trade-offs

  • ❌2011 hardware with 4 GB of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.
  • ❌
    666.7% HIGHER MSRP
    $759 MSRPvs$99 MSRP
  • ❌Lower G3D Mark per dollar, at 2.7 vs 20.3 G3D/$ ($759 MSRP vs $99 MSRP).
  • ❌368.8% higher power demand at 150W vs 32W.
  • ❌75.2% longer card at 254mm vs 145mm.

GeForce GT 645

2012

Why buy it

  • ✅Costs $660 less on MSRP ($99 MSRP vs $759 MSRP).
  • ✅Delivers 658.3% more G3D Mark for each dollar spent, at 20.3 vs 2.7 G3D/$ ($99 MSRP vs $759 MSRP).
  • ✅Draws 32W instead of 150W, a 118W reduction.
  • ✅Measures 145mm instead of 254mm, a 109mm shorter card that is more SFF-friendly.

Trade-offs

  • ❌Less VRAM, with 2 GB vs 4 GB for high-resolution textures and newer games.
  • ❌2012 hardware with 2 GB of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.

Quick Answers

Which GPU is faster for gaming right now?
FirePro V7800 is the faster gaming card right now based on the synthetic data we have. It leads by 1.1% in PassMark G3D (2,028 vs 2,006), which is the best performance signal available in this matchup.
Which GPU is the safer long-term pick for 2026 and beyond?
FirePro V7800 is the safer long-term pick for 2026 and beyond. The case is simple: 4 GB vs 2 GB of VRAM. That gives it more room for heavier textures and higher settings over time.
Which GPU is the better buy today?
GeForce GT 645 makes the most sense to buy today. It is $660 cheaper on MSRP at $99 vs $759, and it leads G3D-per-dollar by 658.3% (20.3 vs 2.7), which is enough to swing the recommendation its way. If you are mainly targeting 1080p and some 1440p, GeForce GT 645 is the easier value choice. If you care more about 1080p and some 1440p headroom, FirePro V7800 has the stronger long-term case.

FirePro V7800 vs GeForce GT 645 Technical Specifications

Side-by-side specs, architecture details, clocks, memory, power, and platform differences.

AMD

FirePro V7800

The FirePro V7800 is manufactured by AMD. It was released in May 24 2011. It features the TeraScale 3 architecture. The core clock speed is 725 MHz. It has 1280 shading units. The thermal design power (TDP) is 150W. Manufactured using 40 nm process technology. G3D Mark benchmark score: 2,028 points.

NVIDIA

GeForce GT 645

The GeForce GT 645 is manufactured by NVIDIA. It was released in October 1 2012. It features the Kepler architecture. The core clock speed is Up to 710 MHz. It has 384 shading units. The thermal design power (TDP) is 32W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 2,006 points.

⚡

Graphics Performance

The FirePro V7800 scores 2,028 and the GeForce GT 645 reaches 2,006 in the G3D Mark benchmark — just a 1.1% difference, making them near-identical in rasterization performance. The FirePro V7800 is built on TeraScale 3 while the GeForce GT 645 uses Kepler, both on 40 nm vs 28 nm. Shader units: 1,280 (FirePro V7800) vs 384 (GeForce GT 645). Raw compute: 1.856 TFLOPS (FirePro V7800) vs 0.5445 TFLOPS (GeForce GT 645).

FeatureFirePro V7800GeForce GT 645
G3D Mark Score
2,028+1%
2,006
Architecture
TeraScale 3
Kepler
Process Node
40 nm
28 nm
Shading Units
1280+233%
384
Compute (TFLOPS)
1.856 TFLOPS+241%
0.5445 TFLOPS
ROPs
32+100%
16
TMUs
80+150%
32
L1 Cache
320 KB+900%
32 KB
L2 Cache
512 KB+100%
256 KB
✨

Advanced Features (DLSS/FSR)

The GeForce GT 645 gets NVIDIA DLSS, which still tends to look cleaner in motion. The FirePro V7800 leans on FSR, which is flexible and widely supported, but usually a bit rougher at the same settings.

FeatureFirePro V7800GeForce GT 645
Upscaling Tech
Upscaling support
Upscaling support
Frame Generation
Not Supported
Not Supported
Ray Reconstruction
No
No
Low Latency
Standard
NVIDIA Reflex
💾

Video Memory (VRAM)

The FirePro V7800 has 4 GB of VRAM, while the GeForce GT 645 carries 2 GB. FirePro V7800 gives you 100% more memory capacity, which matters more once you move into heavier textures, mods, or higher resolutions. Memory bus width is 64-bit on the FirePro V7800 and 128-bit on the GeForce GT 645. L2 Cache: 512 KB (FirePro V7800) vs 256 KB (GeForce GT 645) — the FirePro V7800 has significantly larger on-die cache to reduce VRAM reliance.

FeatureFirePro V7800GeForce GT 645
VRAM Capacity
4 GB+100%
2 GB
Memory Type
GDDR5
GDDR5
Bus Width
64-bit
128-bit+100%
L2 Cache
512 KB+100%
256 KB
🖥️

Display & API Support

DirectX support: 11.2 (FirePro V7800) vs 12 (11_0) (GeForce GT 645). Vulkan: None vs 1.2. OpenGL: 4.4 vs 4.6. Maximum simultaneous displays: 3 vs 3.

FeatureFirePro V7800GeForce GT 645
DirectX
11.2
12 (11_0)+7%
Vulkan
None
1.2
OpenGL
4.4
4.6+5%
Max Displays
3
3
🎬

Media & Encoding

Hardware encoder: None (FirePro V7800) vs NVENC (1st Gen) (GeForce GT 645). Decoder: UVD 2.3 vs NVDEC (1st Gen). Supported codecs: H.264,VC-1,MPEG-2 (FirePro V7800) vs H.264,MPEG-2,VC-1 (GeForce GT 645).

FeatureFirePro V7800GeForce GT 645
Encoder
None
NVENC (1st Gen)
Decoder
UVD 2.3
NVDEC (1st Gen)
Codecs
H.264,VC-1,MPEG-2
H.264,MPEG-2,VC-1
🔌

Power & Dimensions

The FirePro V7800 draws 150W versus the GeForce GT 645's 32W — a 129.7% difference. The GeForce GT 645 is more power-efficient. Recommended PSU: 350W (FirePro V7800) vs 350W (GeForce GT 645). Power connectors: PCIe-powered vs PCIe-powered. Card length: 254mm vs 145mm, occupying 1 vs 1 slots. Typical load temperature: 85°C vs 80.

FeatureFirePro V7800GeForce GT 645
TDP
150W
32W-79%
Recommended PSU
350W
350W
Power Connector
PCIe-powered
PCIe-powered
Length
254mm
145mm
Height
111mm
111mm
Slots
1
1
Temp (Load)
85°C
80-6%
Perf/Watt
13.5
62.7+364%
💰

Value Analysis

At launch, the FirePro V7800 came in at $759, while the GeForce GT 645 launched at $99. On MSRP, GeForce GT 645 was 87% cheaper ($660 less). Performance per dollar on MSRP (G3D Mark / MSRP): 2.7 (FirePro V7800) vs 20.3 (GeForce GT 645) — the GeForce GT 645 offers 651.9% better value. The newer card here is GeForce GT 645 (2012 vs 2011).

FeatureFirePro V7800GeForce GT 645
MSRP
$759
$99-87%
Performance per Dollar
2.7
20.3+652%
Codename
Cayman
GK107
Release
May 24 2011
October 1 2012
Ranking
#656
#903
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